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Keysight Technologies N5244/5B Service Manual

Keysight Technologies N5244/5B Service Manual

2-port and 4-port pna-x microwave network analyzers

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N5244/5B 2-Port and 4-Port

PNA-X Microwave Network

Analyzers - Service Guide

N5244/5B Series -

(900 Hz/10 MHz - 43.5 GHz)

(900 Hz/10 MHz - 50 GHz)

This is the Service Guide for the N5244/5B Series Microwave Network Analyzers.

Service Guide

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Page 1 N5244/5B 2-Port and 4-Port PNA-X Microwave Network Analyzers - Service Guide N5244/5B Series - (900 Hz/10 MHz - 43.5 GHz) (900 Hz/10 MHz - 50 GHz) This is the Service Guide for the N5244/5B Series Microwave Network Analyzers. Service Guide...
Page 2 EULA. Keysight agreement and written consent with the terms of such license. shall be under no obligation to from Keysight Technologies, Inc. as U.S. Government Rights update, revise or otherwise governed by United States and modify the Software. With international copyright laws.
Page 5: Table Of Contents
Contents 1. Safety and Regulatory Information Information in This Chapter ..........1-1 Chapter One at-a-Glance .
Page 6 Contents Performance Tests ............3-8 Certificate of Calibration .
Page 7 Contents IF Response Adjustment (Available Only with Option S93093/4A/B and or S93900/1/2/4/5/7A/B Installed) ......... . 3-57 Noise Figure Adjustment (Available with Option 029 with S93029A/B Installed) .
Page 8 Instrument Block Diagrams – 4-Port (Sheet 4), LFE and Non-DDS (Version 6 Synthesizers) . . 4-68 Microwave PNA-X, N5244/5B – 4-Port, LFE and Non-DDS (Version 6 Synthesizers) . 4-68 Instrument Block Diagrams – 4-Port (Sheet 5), Non-LFE and DDS (Version 7 Synthesizer Assemblies) .
Page 9 Contents A33–A36 Test Port Couplers ..........5-45 A38–A41 60-dB Source Step Attenuators and A42–A45 Bias Tees (Optional) .
Page 10 Contents Top Hardware and Miscellaneous Parts, All Options ......6-293 Bottom Hardware and Miscellaneous Parts ....... . . 6-295 Internal Hardware and Miscellaneous Parts, All Options .
Page 11 Contents Removing and Replacing the A56 Port 1 Noise Bypass Switch (Option 029)... 7-66 Removing and Replacing the A57 Port 2 Noise Bypass Switch and A59 Noise Receiver (Downconverter) – (Option 029)..........7-69 Removing and Replacing the A64 Tuner (Option 029) .
Page 12 Contents Keysight N5244B/45B Service Guide...
Page 13: Safety And Regulatory Information
Keysight Microwave Network Analyzers 2-Port and 4-Port PNA-X Service Guide Safety and Regulatory Information Information in This Chapter This chapter provides safety information that will help protect you and your network analyzer. It also contains information that is required by various government regulatory agencies.
Page 14: Safety Symbols
Safety and Regulatory Information Safety Symbols Safety Symbols The following safety symbols are used throughout this manual. Familiarize yourself with each of the symbols and its meaning before operating this instrument. Caution denotes a hazard. It calls attention to a procedure that, if not correctly performed or adhered to, could result in damage to or destruction of the instrument.
Page 15: General Safety Considerations
Safety and Regulatory Information General Safety Considerations General Safety Considerations Safety Earth Ground This is a Safety Class I product (provided with a protective earthing ground incorporated in the power cord). The mains plug shall only be inserted in a socket outlet provided with a protective earth contact.
Page 16 Safety and Regulatory Information General Safety Considerations Do not operate the analyzer with the outer cover removed for more than 30 minutes, as this could cause the analyzer to overheat which could result in costly damage. Ventilation Requirements: When installing the product in a cabinet, the convection into and out of the product must not be restricted.
Page 17: Servicing
Safety and Regulatory Information General Safety Considerations Servicing These servicing instructions are for use by qualified personnel only. To avoid electrical shock, do not perform any servicing unless you are qualified to do so. Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended.
Page 18 Safety and Regulatory Information General Safety Considerations Figure 1-1 Location of Calibration Stickers on PNA Keysight N5244B/45B Service Guide...
Page 19: Electrostatic Discharge Protection
Safety and Regulatory Information Electrostatic Discharge Protection Electrostatic Discharge Protection Protection against electrostatic discharge (ESD) is essential while removing assemblies from or connecting cables to the network analyzer. Static electricity can build up on your body and can easily damage sensitive internal circuit elements when discharged.
Page 20 Safety and Regulatory Information Electrostatic Discharge Protection Figure 1-2 ESD Protection Setup Keysight N5244B/45B Service Guide...
Page 21: Regulatory Information
Safety and Regulatory Information Regulatory Information Regulatory Information This section contains information that is required by various government regulatory agencies. Instrument Markings The table below lists the definitions of markings that may be on or with the product. Familiarize yourself with each marking and its meaning before operating the instrument.
Page 22 Safety and Regulatory Information Regulatory Information This symbol identifies the Protective Conductor terminal. This symbol indicates the equipment is protected throughout by double or reinforced insulation. The CE mark is a registered trademark of the European Community (if accompanied by a year, it is the year when the design was proven). It indicates that the product complies with all the relevant directives.
Page 23 Safety and Regulatory Information Regulatory Information The crossed-out wheeled bin symbol indicates that separate collection for waste electric and electronic equipment (WEEE) is required, as obligated by the EU DIRECTIVE and other National legislation. Please refer to www.keysight.com/go/takeback to understand your trade-in options with Keysight, in addition to product takeback instructions.
Page 24: Lithium Battery Disposal
If the battery on the A21 CPU board assembly needs to be disposed of, dispose of it in accordance with your country’s requirements. If required, you may return the battery to Keysight Technologies for disposal. Refer to “Contacting Keysight” on page 2-7 for assistance.
Page 25: General Product Information
Keysight Microwave Network Analyzers 2-Port and 4-Port PNA-X Service Guide General Product Information Information in This Chapter Chapter Two at-a-Glance Section Title Summary of Content Start Page Maintenance Cleaning instructions for the external surfaces of your page 2-2 analyzer. Information about electrical maintenance of your analyzer.
Page 26: Maintenance
General Product Information Maintenance Maintenance Physical Maintenance To prevent electrical shock, disconnect the analyzer from the mains source before cleaning. Use a dry cloth or one slightly dampened with water to clean the external case parts. Do not attempt to clean internally.
Page 27: Analyzer Options, Accessories, And Upgrades Available
General Product Information Analyzer Options, Accessories, and Upgrades Available Analyzer Options, Accessories, and Upgrades Available To see a list of the options, accessories, and upgrades available for the network analyzers, including ordering information, refer to the Keysight PNA Family Microwave Network Analyzers Configuration Guide, available online at https://www.keysight.com/us/en/assets/7018-05185/configuration-guides/ 5992-1465.pdf (5992-1465EN).
Page 28: Required Service Test Equipment
General Product Information Required Service Test Equipment Required Service Test Equipment Serial Number Critical Specifications Recommende Alternate Equipment d Model or Model or Part Prefixes Affected Part Number Number Test Instruments and Software Frequency counter All prefixes Freq: 10 MHz to 20 GHz 53151A None P, A,T...
Page 29 General Product Information Required Service Test Equipment Critical Specifications Recommended Alternate Model Equipment Model or Part or Part Number Number Calibration and Verification Kits 2.4 mm calibration kit 85056A 85056D DC to 50 GHz DC to 50 GHz 2.4 mm verification kit 85057B None 45 MHz to 50 GHz...
Page 30 General Product Information Required Service Test Equipment Critical Specifications Recommended Alternate Equipment Model or Part Model Number Number 1/4-inch and 5/16-inch Thin profile 8710-0510 open-end wrench 5/16-inch, open-end torque 1.1 and 2.4 N-m wrench (10 and 21 in-lb) settings (for semi-rigid cables) 1-inch, open-end torque 8.1 N-m (72 in-lb) setting (for...
Page 31: Keysight Support, Services, And Assistance
— R1282A Return to Keysight Calibration Plan The analyzer is delivered with a one-year calibration certificate. Options are available to have Keysight Technologies provide three or five year calibration coverage (perform the annual calibration two or four times). Options for basic calibration or ISO/IEC 17025 or ANSI/NCSL Z540.3–2006 standards compliant calibrations are available.
Page 32: Shipping Your Analyzer To Keysight For Service Or Repair
Keysight for repair. If you wish to send your network analyzer to Keysight Technologies for service or repair: — Include a complete description of the service requested or of the failure and a description of any failed test and any error message.
Page 33: Tests And Adjustments
Keysight Microwave Network Analyzers 2-Port and 4-Port PNA-X Service Guide Tests and Adjustments Information in This Chapter This chapter contains procedures to help you check, verify, and adjust your PNA. — The checks verify the operation of the assemblies in your analyzer. —...
Page 34 Tests and Adjustments Information in This Chapter Section Title Summary of Content Start Page About System Descriptions of: page 3-7 Verification and — System Specifications Performance Tests — Instrument Specifications — System Verification Procedure — Performance Tests — Certificate of Calibration ANSI/NCSL The ANSI/NCSL Z540.3-2006 and ISO/IEC 17025 process of verifying page 3-10...
Page 35 Tests and Adjustments Information in This Chapter Section Title Summary of Content Start Page A brief summary of each performance test: page 3-32 Performance Tests — Source Maximum Power Output Test — Source Power Linearity Test — Frequency Accuracy Test —...
Page 36: Before You Begin
Tests and Adjustments Before You Begin Before You Begin Before checking, verifying, or adjusting the analyzer, refer to the following paragraphs to: — make sure the operating environment is within its requirements — make sure that proper electrostatic discharge (ESD) protection is provided —...
Page 37: Allow The Analyzer To Warm Up
Prior to making connections to your analyzer, carefully review the information about inspecting, cleaning, and gaging connectors. Refer to the calibration kit documentation for detailed connector care information. For course numbers about additional connector care instruction, contact Keysight Technologies. Refer to “Contacting Keysight” on page 2-7. Table 3-1...
Page 38 Tests and Adjustments Before You Begin Table 3-1 Connector Care Quick Reference Guide — Gage all connectors before first use Making Connections — Align connectors carefully Do Not — Apply bending force to connection — Make preliminary connection contact — Over tighten preliminary connection lightly —...
Page 39: About System Verification And Performance Tests
Tests and Adjustments About System Verification and Performance Tests About System Verification and Performance Tests The performance of the network analyzer is specified in two ways: system specifications, and instrument specifications. It is the end user’s responsibility to determine which set of specifications is applicable to their use of the PNA. A network analyzer measurement “system”...
Page 40: Instrument Specifications
Tests and Adjustments About System Verification and Performance Tests Instrument Specifications The analyzer's system specifications are described in the Data Sheet and Technical Specifications documents and also in the analyzer’s on-line help system in the section titled “Corrected System Performance”. Refer to https://www.keysight.com/us/en/assets/9018-04521/technical-specificatio ns/9018-04521.pdf...
Page 41: Certificate Of Calibration
About System Verification and Performance Tests Certificate of Calibration Keysight Technologies will issue a certificate of calibration upon successful completion of system verification or completion of the performance tests. The certificate of calibration will apply to the “system” (analyzer, calibration kit, test cables, and any necessary adapters) if the system verification procedure is used to confirm the system specifications.
Page 42: Ansi/Ncsl Z540.3-2006 And Iso/Iec Verification
Tests and Adjustments ANSI/NCSL Z540.3–2006 and ISO/IEC Verification ANSI/NCSL Z540.3–2006 and ISO/IEC Verification To meet the criteria for ANSI/NCSL Z540.3-2006 and ISO/IEC 17025 verification, perform the preliminary checks and all performance tests without stopping to repair or adjust . Refer to Figure 3-1 for test flow.
Page 43: Non-Standards Compliant Verification
Tests and Adjustments Non-Standards Compliant Verification Non-Standards Compliant Verification To meet the criteria for non-standards compliant verification, perform the preliminary checks and the performance tests while stopping to troubleshoot. Refer to Figure 3-2 for test flow. Troubleshoot and repair the first problem encountered without continuing to other tests.
Page 44: Preliminary Checks
Tests and Adjustments Preliminary Checks Preliminary Checks Preliminary checks include the following: — “The Operator’s Check” on page 3-12 The operator’s check tests the network analyzer’s basic functionality of the source, switch, and receivers. — “The Test Port Cable Checks” on page 3-15 The test port cable checks are not required, but are recommended to verify the performance of the test port cables before performing the verification test.
Page 45 Tests and Adjustments Preliminary Checks 4. If shorts and opens are not connected to all ports, you will be prompted to connect them as needed. 5. The result of the operator’s check will be shown as a PASS or FAIL next to each test (refer to Figure 3-3).
Page 46 Tests and Adjustments Preliminary Checks Figure 3-3 Operator’s Check Dialog Boxes 3-14 Keysight N5244B/45B Service Guide...
Page 47: The Test Port Cable Checks
Tests and Adjustments Preliminary Checks If the Operator’s Check Fails 1. Clean the test ports, shorts, and adapters. Torque to specification. Repeat the check. 2. If the check still fails, suspect a faulty component. Refer to “Measurement System Troubleshooting” on page 4-31 to begin troubleshooting to determine the faulty component.
Page 48 Tests and Adjustments Preliminary Checks Figure 3-4 Typical Cable Return Loss Response If the Cable Return Loss Check Fails 1. Clean the cable and devices and torque to specification. Repeat the check. 2. If the check still fails, the cable should be repaired or replaced. Cable Insertion Loss Check The method below runs on the PNA environment using a mechanical Cal kit.
Page 49 Tests and Adjustments Preliminary Checks 7. Press UTILITY Macro , then . Select Calset 1 and Calset 2 Adapter Cha as shown below in Figure 3-5. Figure 3-5 Adapter Characterize Dialog Box 8. Click the Characterize And Save button in the lower-left corner of the dialog box.
Page 50 Tests and Adjustments Preliminary Checks Figure 3-6 Typical Cable Insertion Loss Response If the Cable Insertion Loss Check Fails 1. Clean the cable and devices and torque to specification. Repeat the check. 2. If the check still fails, the cable should be repaired or replaced. Cable Magnitude and Phase Stability Check 1.
Page 51 Tests and Adjustments Preliminary Checks 6. To provide a good reference, hold the test cable in a straight line perpendicular to the front panel of the network analyzer. 7. Press RESPONSE , then Averaging Restart 8. Wait for the analyzer to average the measurement 50 times (approximately two seconds).
Page 52 Tests and Adjustments Preliminary Checks If the Cable Magnitude and Phase Stability Check Fails 1. Clean the cable and devices and torque to specification. Repeat the check. 2. If the check still fails, the cable should be repaired or replaced. Cable Connector Repeatability Check The connector repeatability measurement should be done at the test port as well as at the end of the test port cable.
Page 53 Tests and Adjustments Preliminary Checks 10.To re-normalize the data trace of the reconnected cable: press MARKER/ANALYSIS , then , then ENTRY Memory Data->Memory Enter 11.Repeat steps 7 through 9 at least three times to look for modes. Modes appear when a harmonic of the source fundamental frequency is able to propagate through the cable or connector.
Page 54: System Verification
Tests and Adjustments System Verification System Verification System verification is used to verify system-level, error-corrected uncertainty limits for network analyzer measurements. The verification procedure is automated and is contained in the firmware of the analyzer. The device data provided with the verification kit has a traceable path to a national standard.
Page 55: Measurement Traceability
Tests and Adjustments System Verification — directivity, — source match, — load match, — reflection and transmission frequency tracking, and — isolation (crosstalk). The random errors include: — noise, — drift, — connector repeatability, and — test cable stability. A complete description of system errors and how they affect measurements is provided in the analyzer’s on-line embedded help.
Page 56: Performing System Verification
Tests and Adjustments System Verification Figure 3-9 NIST Traceability Path for Calibration and Verification Standard Performing System Verification The following verification procedure is automated by the analyzer firmware. The process for the verification is: — connect cables to the analyzer test ports —...
Page 57 Tests and Adjustments System Verification choose to load an existing recent calibration that was created by the verification process. If necessary, refer to the analyzer’s on-line embedded help for information on storing and recalling calibrations. For each verification device, the analyzer reads a file from the verification disk and sequentially measures the magnitude and phase for all four S-parameters.
Page 58 Tests and Adjustments System Verification If the system verification is performed with a non-Keysight cable, ensure that the cable meets or exceeds the specifications for the test cable specified in the previous table, “Equipment Used in the System Verification Procedure.” Refer to the cable’s user’s guide for specifications.
Page 59 Tests and Adjustments System Verification — Print Tabular Data: Prints the verification data in tabular form which includes measured data and uncertainty limits. For an example, refer to Figure 3-12 on page 3-29. — Print Graphs: Prints the verification data in graphical form. The graphical form includes the measured data trace, factory supplied data trace, and uncertainty limits.
Page 60 Tests and Adjustments System Verification 4. If the analyzer still fails the test, check the measurement calibration by viewing the error terms as described in “Accessing Error Terms” on page 8-6. 5. Refer to Figure 3-11 for additional troubleshooting steps. Figure 3-11 System Verification Failure Flowchart Interpreting the Verification Results...
Page 61 Tests and Adjustments System Verification Each S-parameter measurement result is printed with frequency tested, lower and upper limit lines, the measured data, and the result of the test. Figure 3-12 Example of Printed Tabular Verification Results Keysight N5244B/45B Service Guide 3-29...
Page 62 Tests and Adjustments System Verification Figure 3-13 shows an example of typical verification results with Print Graphs selected in the Printer Output area of the System Verification dialog box. The printed graphical results show the following: — the name of the device measured —...
Page 63 Tests and Adjustments System Verification Figure 3-13 Example of Printed Graphical Verification Results Keysight N5244B/45B Service Guide 3-31...
Page 64: Performance Tests
Tests and Adjustments Performance Tests Performance Tests The performance tests verify the electrical performance of your PNA. These performance tests are included in the analyzer’s firmware with Option S93898A. Your analyzer is automatically configured for each individual test. The model numbers of the equipment used by these performance tests are specified under “Required Service Test Equipment”...
Page 65: Source Maximum Power Output Test
Tests and Adjustments Performance Tests Description of the Test: 1. The analyzer is Preset. 2. The analyzer is set up for a CW reflection measurement on the test port to be measured. 3. A power sensor is connected to the test port, using any necessary adapters.
Page 66: Source Power Linearity Test
Tests and Adjustments Performance Tests 6. The analyzer’s output power is increased until a “Source Unleveled” error is detected. The output power is then decreased in increments of 0.01 dB until the error goes away. if the output power reaches +18 dBm without any error, the power is left at this level.
Page 67: Frequency Accuracy Test
Tests and Adjustments Performance Tests 7. This power linearity measurement is repeated at several CW frequencies across the full frequency range of the analyzer. If the Analyzer Fails this Test: — Perform the “Source Adjustment” on page 3-53 and repeat this test. —...
Page 68: Trace Noise Test
Tests and Adjustments Performance Tests Trace Noise Test Function of the Test: To measure the stability of a signal in the internal source and receiver system of your analyzer. Specification Tested: Test Port Input–Trace Noise Magnitude and Trace Noise Phase Equipment Used: A test cable.
Page 69: Receiver Compression Test
Tests and Adjustments Performance Tests Receiver Compression Test Function of the Test: To measure the compression at the analyzer’s specified maximum power level for the receivers. Specification Tested: Test Port Input–Maximum Test Port Input Level Equipment Used: — U3070AK01 or Z5623A Option K01 Compression Test Set —...
Page 70: Noise Floor Test
Tests and Adjustments Performance Tests 11.The magnitude and phase measurements using the receiver under test are read: (Pc). 12.The first test set output attenuator is set to 0 dB. 13.The magnitude and phase measurements using the receiver under test are read: (Pd).
Page 71: Calibration Coefficients Test
Tests and Adjustments Performance Tests 6. The power sensor is disconnected and the cable is connected to the port to be tested. 7. A CW linear measurement sweep is measured for each test point. The receiver reference power level, Pref, in dBm is calculated for each point from the mean of each sweep.
Page 72: Dynamic Accuracy Test - Version 1
Tests and Adjustments Performance Tests 3. The test cable is moved to Port 2. 4. A calibration is performed between the end of the test cable and Port 1. The Port 1directivity and source match and the S12 load match are retrieved from the analyzer.
Page 73: Dynamic Accuracy Test - Version 2
Tests and Adjustments Performance Tests Within the dynamic accuracy test set, the source signal is routed through a small amplifier and a 10 dB step attenuator, A1, to a power splitter. One side of the power splitter is connected to the power sensor port. The signal from the other side of the splitter is routed through a 110 dB step attenuator, A2, to the receiver port.
Page 74 Tests and Adjustments Performance Tests Function of the Test: To measure the relative power linearity of the analyzer’s receivers. Specification Tested: Test Port Input–Dynamic Accuracy Equipment Used: — U3020AD01 dynamic accuracy test set — Signal generator — Power meter — Power sensor —...
Page 75: Receiver Noise Figure Test
Tests and Adjustments Performance Tests — If the analyzer fails this test repeatedly, replace the A23 mixer brick for a Port 1 or Port 2 failure or the A24 mixer brick for a Port 3 or Port 4 failure, then repeat this test. Refer to “Removing and Replacing the A27 and A28 Mixer Bricks”...
Page 76: Noise State Calibration Coefficients
Tests and Adjustments Performance Tests — Check for proper torquing of all semi-rigid cables in the receiver chain, and then repeat this test. — If the analyzer still fails this test, replace the A9 noise receiver board and repeat this test. Refer to “Removing and Replacing the A4–A17 Boards (For analyzers with serial numbers prefixed MY/SG/US5150 and below)”...
Page 77: Noise Receiver Linearity Test
Tests and Adjustments Performance Tests A failure of this test indicates a fault in the noise receiver chain. This can indicate a faulty assembly or a loose cable. — Check for proper torquing of all semi-rigid cables in the receiver chain, and then repeat this test.
Page 78: Noise Receiver Compression Test
Tests and Adjustments Performance Tests 4. With the amplifier active and A1 set to 0 dB, the signal generator power is adjusted to achieve exactly - 10.0 dBm at the power sensor. This is the power meter reference reading, Pmr. 5.
Page 79 Tests and Adjustments Performance Tests Description of the Test: The noise receiver compression level varies from -16 dBm for the high band of the low gain stage down to -52 dBm for the low band of the high gain stage. This range is too wide to get an accurate source power calibration for each gain stage using a standard power sensor.
Page 80: Dynamic Accuracy At Low Frequency (Available With Low Frequency Extension (Lfe) Installed Option 205/220/420/425)
Tests and Adjustments Performance Tests If the Analyzer Fails this Test: A failure of this test indicates a fault in the noise receiver chain. This can indicate a faulty assembly or a loose cable. — Check for proper torquing of all semi-rigid cables in the receiver chain, and then repeat this test.
Page 81 Tests and Adjustments Performance Tests For the two cables between the power splitter and attenuators, choose short but flexible cables. Figure 3-14 Dynamic Accuracy at Low Frequency Setup If the Analyzer Fails this Test: — If the analyzer fails this test, rerun the test. —...
Page 82: Dc Continuity Test The Lfe Board And Test Ports (Available With Low Frequency Extension (Lfe) Installed Option 205/220/405/420/425)
Tests and Adjustments Performance Tests DC Continuity Test the LFE Board and Test Ports (Available With Low Frequency Extension (LFE) Installed Option 205/220/405/420/425) The DC continuity test verifies that the LFE board is installed correctly and does not have any opens or shorts in the DC path. 1.
Page 83: Adjustments
Tests and Adjustments Adjustments Adjustments These adjustments are firmware-driven tests that are used to fine-tune your analyzer. If multiple adjustments are to be performed, perform them in the order listed. — “Touchscreen Adjustment and Verification” on page 3-51 — “10 MHz Frequency Reference Adjustment” on page 3-52 —...
Page 84: 10 Mhz Frequency Reference Adjustment
Tests and Adjustments Adjustments Step 3. In the Table PC Setting window that opens, press Calibrate... Step 4. When the User Account Control opens, press Yes. Step 5. After pressing all of the cross hair calibration points a Digitizer Calibration Tool window opens, press Yes.
Page 85: Synthesizer Bandwidth Adjustment
Tests and Adjustments Adjustments Figure 3-15 Equipment Setup for the 10 MHz Frequency Reference Adjustment Service Adjustment Routines 2. Press UTILITY , then , then , then System click 10 MHz Freq Adjustment. 3. Ensure the GPIB settings are correct. 4.
Page 86: If Gain Adjustment
Tests and Adjustments Adjustments Procedure 1. Connect the equipment as shown in Figure 3-16. Connect a GPIB cable between the network analyzer and the power meter. Figure 3-16 Equipment Setup for the Source Adjustment Service Adjustment Routines 2. .Press UTILITY System , then , then...
Page 87: Receiver Adjustment
Tests and Adjustments Adjustments 2. Follow the instructions and prompts as they are displayed. Receiver Adjustment The receiver calibration is used to adjust the network analyzer receivers for a flat response across its full frequency range: 1. A power meter/sensor is connected to Port 1, as shown in Figure 3-17, to establish a reference for flatness.
Page 88 Tests and Adjustments Adjustments Figure 3-17 Equipment Setup 1 for the Receiver Adjustment Service Adjustment Routines 2. Press UTILITY System , then , then , then click Receiver Adjustment. 3. Ensure the GPIB settings are correct. 4. Follow the instructions and prompts as they are displayed. Figure 3-18 Equipment Setup 2 for the Receiver Adjustment 3-56...
Page 89: Ee Default Adjustment
Tests and Adjustments Adjustments Figure 3-19 Equipment Setup 3 for the Receiver Adjustment EE Default Adjustment This sets the EEPROM data to their default values. Procedure Service Adjustment Routines 1. Press UTILITY System , then , then , then click EE Default Adjustment. 2.
Page 90: Noise Figure Adjustment (Available With Option 029 With S93029A/B Installed)
Tests and Adjustments Adjustments Noise Figure Adjustment (Available with Option 029 with S93029A/B Installed) Option 029 enables noise figure measurements up to 50 GHz. In A models this Option was 029 or H29. The noise figure adjustment should be performed after replacing any component in the noise figure circuitry, or if the PNA fails the noise IF gain portion of the Op check.
Page 91 Tests and Adjustments Adjustments — Set the GPIB address to match the address of the power meter. — If using a single channel power meter, use the default setting Ch. A. If using a dual channel power meter and the sensor is attached to the B channel, select Ch.
Page 92 Tests and Adjustments Adjustments Figure 3-21 Equipment Setup 1 for the Receiver Adjustment 5. When prompted, disconnect the cable from port 2 and connect it to the power sensor. See Figure 3-22. Figure 3-22 Equipment Setup 2 for the Receiver Adjustment 6.
Page 93: Lfe Receiver Adjustment (Available With Low Frequency Extension (Lfe) Installed Option 205/220/420/425)
Tests and Adjustments Adjustments Figure 3-23 Equipment Setup 3 for the Receiver Adjustment The entire procedure takes about 30 to 45 minutes. LFE Receiver Adjustment (Available With Low Frequency Extension (LFE) Installed Option 205/220/420/425) The LFE Receiver adjustment is required when upgrading to Option 205 or 425. In addition, this adjustment must be performed each time a new configuration is set up or if cables are changed.
Page 94 Tests and Adjustments Adjustments 3-62 Keysight N5244B/45B Service Guide...
Page 95: Troubleshooting
Keysight Microwave Network Analyzers 2-Port and 4-Port PNA-X Service Guide Troubleshooting Information in This Chapter The information in this chapter helps you: — Identify the portion of the analyzer at fault. — Locate the specific troubleshooting procedure to identify the assembly or peripheral at fault.
Page 96: Chapter Four At-A-Glance
Troubleshooting Information in This Chapter Chapter Four at-a-Glance Section Title Summary of Content Start Page Getting Started with page 4-7 A starting point for troubleshooting. Troubleshooting Power Up Troubleshooting page 4-9 Power-up problems: — Power supply problems — LCD problems —...
Page 97: Conventions Used For Hardkeys, Softkeys, And Menu Items
Troubleshooting Information in This Chapter Section Title Summary of Content Start Page Instrument Block Diagrams Block diagrams for the analyzer including all options. page 4-56 — “Instrument Simplified Block Diagrams – LFE” on page 4-56 Non-LFE Block Diagrams: page 4-62 —...
Page 98: Operating The Analyzer With Covers Removed
Troubleshooting Operating the Analyzer With Covers Removed Operating the Analyzer With Covers Removed Do not operate the analyzer with the outer cover removed for more than 30 minutes, as this could cause the analyzer to overheat which could result in costly damage. Keysight N5244B/45B Service Guide...
Page 99: Protect Against Electrostatic Discharge (Esd)
Troubleshooting Protect Against Electrostatic Discharge (ESD) Protect Against Electrostatic Discharge (ESD) This is important. If not properly protected against, electrostatic discharge can seriously damage your analyzer, resulting in costly repair. To reduce the chance of electrostatic discharge, follow all of the recommendations outlined in “Electrostatic Discharge Protection”...
Page 100: Assembly Replacement Sequence
Troubleshooting Assembly Replacement Sequence Assembly Replacement Sequence After identifying the problem requiring an assembly to be replaced, follow these steps: Step 1. Order a replacement assembly. Refer to Chapter 6, “Replaceable Parts.” Step 2. Replace the faulty assembly and determine what adjustments are necessary. Refer to Chapter 7, “Repair and Replacement Procedures.”...
Page 101: Getting Started With Troubleshooting
Check the Basics A problem can often be solved by repeating the procedure you were following when the problem occurred. Before calling Keysight Technologies or returning the instrument for service, please perform the following checks: 1. Is there power at the mains receptacle? If not, correct this situation and proceed.
Page 102: Troubleshooting Organization
Troubleshooting Getting Started with Troubleshooting Troubleshooting Organization Follow the flowgraph in Figure 4-1 to help direct you to the correct section for troubleshooting the analyzer. Figure 4-1 Troubleshooting Organization Flowchart Go to “Power Up Troubleshooting” Go to “Front Panel Troubleshooting” Go to “Rear Panel Troubleshooting”...
Page 103: Power Up Troubleshooting
Troubleshooting Power Up Troubleshooting Power Up Troubleshooting Immediately unplug the instrument from the ac power line if the unit shows any of the following symptoms: — Smoke, arcing, or unusual noise from inside the analyzer. — A circuit breaker or fuse on the main ac power line opens. Check your network analyzer for evidence that it is powering up correctly.
Page 104: Power Supply Check
Troubleshooting Power Up Troubleshooting Power Supply Check There are no fuses to replace within the power supply. If you determine that the power supply is the failed assembly, replace the power supply. A catastrophic failure in the power supply can be determined by observing the line switch and the power supply LED indicators: 1.
Page 105 Troubleshooting Power Up Troubleshooting Figure 4-2 A19 Midplane Board Power Supply LED Indicators and Measurement Points The instrument contains potentially hazardous voltages. Refer to the safety symbols provided on the instrument and in “General Safety before operating the unit with the cover Considerations”...
Page 106 Troubleshooting Power Up Troubleshooting If any one individual voltage supply from the A20 power supply develops an over-voltage or over-current problem, all supplies are affected. The cause of the over-voltage or over-current condition can be the A20 power supply itself, or any assembly to which the A20 power supply provides voltage.
Page 107 Troubleshooting Power Up Troubleshooting 1. Unplug the A23 test set motherboard ribbon cable from the A23 test set motherboard (refer to “Removing and Replacing the A23 Test Set Motherboard” on page 7-38). 2. Unplug the A23 test set motherboard to A24 IF multiplexer board ribbon cable from the A24 IF multiplexer board (refer to “Removing and Replacing the A24 IF Multiplexer Board”...
Page 108 Troubleshooting Power Up Troubleshooting To further isolate the failure in the three remaining assemblies, measure the resistance (with the power turned off) from the power supply test points to either ACOM or DCOM. Make sure that the only assemblies plugged in are the four minimum required assemblies listed above.
Page 109: Troubleshooting Lcd Display Problems
Troubleshooting Power Up Troubleshooting Figure 4-3 Fan Power Cable Connections 3. If the correct voltage is present at each connection and the fan connectors are in good mechanical condition, suspect a defective fan. Refer to “Removing and Replacing the Fans” on page 7-89.
Page 110 Troubleshooting Power Up Troubleshooting 2. If the display is dark (not visible), connect an external VGA monitor to the rear panel Monitor output connector. (Be aware that some multisync monitors might not be able to lock to a 60 Hz sync pulse.) If the video information is not present on the external VGA monitor, the most probable cause is the A21 CPU board.
Page 111: Front Panel Troubleshooting
Troubleshooting Front Panel Troubleshooting Front Panel Troubleshooting The front panel assembly consists of the A1 front panel interface board, the keypad, the A2 USB board, and the A3 display assembly. The following tests verify the operation of the front panel assembly when the analyzer is in the measurement mode.
Page 112 Troubleshooting Front Panel Troubleshooting Figure 4-4 Front Panel Key Test Utility Dialog Box Checking the Front Panel Keys To check the front panel keys, push each key and compare the name in the Key Label box to the name physically labeled on the key cap. These names are also Table 4-2 below.
Page 113 Troubleshooting Front Panel Troubleshooting Table 4-2 Front Panel Keyboard Key Names INSTRUMENT Keypad STIMULUS Keypad Keypad Keypad ENTRY ENTRY Keys Code Keys Code Code Code Keys (cont.) Keys Prev Freq Next Power Cancel Trace Sweep Bk Sp Channel Trigger Display Keypad Navigation Code...
Page 114: A3 Display Test
Troubleshooting Front Panel Troubleshooting Checking the RPG (Front Panel Knob) This section assumes you have completed the introduction and opened the Front Panel Key Test Utility window. Refer to “Front Panel Keypad and RPG Test” on page 4-17. To check the RPG knob: 1.
Page 115: Checking The A2 Usb Board
Troubleshooting Front Panel Troubleshooting What Is a Damaged Pixel? A pixel is a picture element that combines to create the image on the display. A pixel is about the size of a small pin point. A damaged pixel is a pixel that has a constant blue, green, red, black, or other color appearance that will not change.
Page 116: A1 Front Panel Interface Board
Troubleshooting Front Panel Troubleshooting 5. If the device does not perform correctly, the USB may need to be reset. Use Windows Device Manager to look for any cautions or warnings and repair those first. Refer to Windows Help. The Windows Device Manager can be used to enable/disable the USB drivers and may repair your USB hub(s).
Page 117 Troubleshooting Front Panel Troubleshooting Checking the Display To verify the display functionality, refer to “A3 Display Test” on page 4-20. Keysight N5244B/45B Service Guide 4-23...
Page 118: Rear Panel Troubleshooting
Troubleshooting Rear Panel Troubleshooting Rear Panel Troubleshooting Each rear panel connector is associated with a hardware group in the analyzer. You can use the data at these rear panel connectors to help troubleshoot these hardware groups in addition to testing the connectors. The connectors discussed in this section are: —...
Page 119: Lan Troubleshooting
Troubleshooting Rear Panel Troubleshooting 4. If the Window Desktop is not displayed, press UTILITY System , then Configure Control Panel... , then to view the Windows Taskbar menu at the bottom of the display. 5. On the Windows Taskbar menu, click Start then point to Programs, National Instruments NI-488.2, and then click Explore GPIB to open the Measurement &...
Page 120 Troubleshooting Rear Panel Troubleshooting The purpose of this section is to determine if the analyzer's hardware is functioning properly. While the turn-on self-test verifies some LAN hardware functionality, it is limited to internal testing only. Incorrect IP addresses will prevent proper operation. Improper subnet masks may allow only one-way communication, while improper gateway addresses may exclude outside LAN access.
Page 121 Troubleshooting Rear Panel Troubleshooting d. At the prompt, type ping xxx.xxx.xxx.xxx and press ENTRY Enter on the front panel. Refer to Step 5 for the results of a successful ping. 5. The analyzer attempts four cycles of communications with the indicated LAN device.
Page 122 Troubleshooting Rear Panel Troubleshooting If the analyzer can talk to the network, but the network can not talk to the analyzer, then the computer or device used from the network may have a subnet mask that excludes communication with the IP address chosen for the analyzer.
Page 123 Troubleshooting Rear Panel Troubleshooting 1. Strip away a few inches of the outside jacket insulation from the middle of a standard LAN cable that has an RJ-45 connector on each end. Pins 1, 2, 3, and 6 of the connectors must be located to determine which wires to cut in the following steps.
Page 124 Troubleshooting Rear Panel Troubleshooting Figure 4-6 Construction of a Crossover Cable 4-30 Keysight N5244B/45B Service Guide...
Page 125: Measurement System Troubleshooting
Troubleshooting Measurement System Troubleshooting Measurement System Troubleshooting This section provides troubleshooting procedures for the measurement portion of the PNA. In this section, the analyzer is used as a tool to help isolate the suspected faulty functional group. Once the faulty functional group is determined, troubleshooting steps are provided to help you isolate the faulty assembly or part.
Page 126 Troubleshooting Measurement System Troubleshooting EEPROM Headers The network analyzer application uses the firmware revision information stored in the pc board header EEPROM. If the information stored in any EEPROM is incorrect, the network analyzer may not operate properly. The following link lists the pc boards in your network analyzer that contain EEPROM headers.
Page 127: Verifying The A, B, C, D, And R Traces (Standard S-Parameter Mode)
Troubleshooting Measurement System Troubleshooting Verifying the A, B, C, D, and R Traces (Standard S-Parameter Mode) The first step is to verify that the A, B,C, D, and R traces are present and that they are approximately level: — Connect an Open or Short standard from a mechanical calibration kit to each test port (use adapters if necessary).
Page 128: Where To Begin Troubleshooting
Troubleshooting Measurement System Troubleshooting Figure 4-9 Typical 5-Receiver Display for 4-Port Models — If all traces are present and are similar to the traces in Figure 4-8 Figure 4-9, then there are no major problems with the analyzer’s measurement system. There may, however, be a minor failure in the analyzer. To test further: —...
Page 129 Troubleshooting Measurement System Troubleshooting — A14 frequency reference — A4 and A17 (A17 optional on 2-port analyzers) 13.5 GHz source synthesizers — A5 and A10 (A10 optional on 2-port analyzers) sources — A15 13.5 GHz LO synthesizer — A25 HMA26.5 —...
Page 130 Click the Hardware tab, click Device Manager, and then expand Keysight PNA DSP Device in the resulting list. The following entry should be listed: Keysight Technologies DSP Driver #2 and should be enabled. 2. If the entry is not present or if the icon to the left of the name is a...
Page 131: Checking The Source Group
Troubleshooting Measurement System Troubleshooting Checking the Source Group Source Group Tests Before checking the source group assemblies, you must open the analyzer. Use an antistatic work surface and wrist strap to reduce the chance of electrostatic discharge for all of the procedures in this chapter. 1.
Page 132 Troubleshooting Measurement System Troubleshooting Equipment Used for This Check Equipment Type Model or Alternate Model or Part Number Part Number Power meter E4418B/E4419B E4418A/E4419A Power sensor, 2.4 mm E8487A None Adapter, 2.4 mm (f) to 2.4 mm (f) 11900B 85056-60007 Equipment Setup 1.
Page 133 Troubleshooting Measurement System Troubleshooting 2. Disconnect cables W75, W76, and W77, one at a time, from the A14 board. 3. Connect the spectrum analyzer to the open connector on the A14 board. 4. The spectrum analyzer should measure a signal at 50 MHz. 5.
Page 134 Troubleshooting Measurement System Troubleshooting 5. If the A15 DDS assembly is faulty, contact Keysight Technologies for help. Refer to “Contacting Keysight” on page 2-7. Figure 4-10 Example of Power On Self Test Error 4-40 Keysight N5244B/45B Service Guide...
Page 135 Troubleshooting Measurement System Troubleshooting Figure 4-11 Example of Instrument Power Up Log Data with A15 DDS Assembly Failure Data Checking the A15 13.5 GHz LO Synthesizer Output 1. Refer to the block diagram at the end of this chapter and to “Top Cables, All Cables—All Options, S/N Prefixes <6021”...
Page 136 Troubleshooting Measurement System Troubleshooting 5. If the observed problem was frequency banded rather than broadband related, set the analyzer frequency to the center of the problem band. The spectrum analyzer should measure a signal above the network analyzer setting. For analyzers with DSP version 4.0, the signal is 7.61 MHz above the network analyzer setting.
Page 137 Troubleshooting Measurement System Troubleshooting 6. If the signal is not present but the signal is present from “Checking the A15 13.5 GHz LO Synthesizer Output” (S/N prefixes <6021) or “Checking the A15 Direct Digital Synthesizer (DDS) Assembly Outputs” (LO Output, prefixes ≥6021), replace the A25 HMA 26.5.
Page 138 Troubleshooting Measurement System Troubleshooting Figure 4-12 Comparison of Legacy HMA26.5 (5087-7765) and New HMA26.5 (N5240-60101) Checking the A26 Splitter Output IMPORTANT! Some PNAs have installed a legacy HMA26.5 (5087-7765) that is used with a discrete A26 splitter. Some PNAs have installed a new HMA26.5 (N5240-60101) with an integrated splitter.
Page 139 Troubleshooting Measurement System Troubleshooting 6. If the signal is not present but the signal from “Checking the A25 HMA26.5 Output,” is present, replace the A26 splitter. Refer to “Removing and Replacing the A26 Splitter” on page 7-46. 7. If the signal is present, reconnect cables W53 and W54, and then continue with “Checking the Receiver Group”...
Page 140 Troubleshooting Measurement System Troubleshooting 2. Disconnect cables W3 and W4 or cables W7 and W8, dependent on which source board is to be checked, at the A7, A8, A12, or A13 50 GHz Doubler board. 3. Connect the spectrum analyzer to the open connector at the end of the cable that connects to the source board to be checked.
Page 141 Troubleshooting Measurement System Troubleshooting 6. If the signal is not present but the signals from “Checking the A4 and A17 Source Synthesizer Outputs” are present, replace the appropriate doubler board. Refer to “Removing and Replacing the A4–A17 Boards (For analyzers with serial numbers prefixed MY/SG/US5150 and below)” on page 7-20.
Page 142: Checking The Signal Separation Group
Troubleshooting Measurement System Troubleshooting Checking the Signal Separation Group Before checking the signal separation group assemblies, you must open the analyzer. Use an antistatic work surface and wrist strap to reduce the chance of electrostatic discharge for all of the procedures in this chapter. 1.
Page 143 Troubleshooting Measurement System Troubleshooting 2. If the Receiver Display (Figure 4-8 Figure 4-9) is not on the analyzer Service screen, perform the following: Press UTILITY , then , then System Utilities Receiver Display , then 3. Set the sweep speed for a 10 second sweep: Press STIMULUS Sweep Sweep Time then...
Page 144 Troubleshooting Measurement System Troubleshooting Equipment Used for These Tests Equipment Type Model or Alternate Model or Part Part Number Number Spectrum analyzer 8565E 856xE Refer to the NOTE notice on page 4-31. Must be capable of measuring a signal at 7.61 MHz (analyzers with DSP version 4.0), or 7.44 MHz (analyzers with DSP version 5.0), and 1 GHz.
Page 145 Troubleshooting Measurement System Troubleshooting 5. If the 800 MHz signal is not present and the analyzer does not have mechanical switches, replace the reference coupler. Refer to “Removing and Replacing the A29–A32 Reference Couplers and Reference Coupler Mounting Brackets” on page 7-51.
Page 146: Checking The Receiver Group
Troubleshooting Measurement System Troubleshooting — Port 3; W112 of A51 — Port 4; W116 of A52 2. Using a 5/16-inch torque wrench, disconnect the semirigid cable at the bypass switch. 3. Connect the spectrum analyzer to the open bypass switch connector. Set the spectrum analyzer to measure a signal at 800 MHz.
Page 147 Troubleshooting Measurement System Troubleshooting 2. Unplug the power to the analyzer and disconnect all front and rear panel connections except installed jumpers. 3. Remove the outer and inner covers from the analyzer. Refer to “Removing the Covers” on page 7-8. Procedures described in this document are performed with power supplied to the product while protective covers are removed.
Page 148 Troubleshooting Measurement System Troubleshooting 4. Refer to the NOTE notice on page 4-31. The measured signal on the spectrum analyzer should be at 7.61 MHz (analyzers with DSP version 4.0), or 7.44 MHz (analyzers with DSP version 5.0), and 1 GHz. 5.
Page 149 Troubleshooting Measurement System Troubleshooting 5. If the 800 MHz signal is present, replace the associated mixer brick, A27 or A28. Refer to “Removing and Replacing the A27 and A28 Mixer Bricks” on page 7-48. Checking the A24 IF Multiplexer Board 1.
Page 150: Instrument Simplified Block Diagrams - Lfe
Troubleshooting Instrument Simplified Block Diagrams – LFE Instrument Simplified Block Diagrams – LFE 2-Port N5290A System Block Diagram (201 and 205) Figure 4-14 System Block Diagram Legend Figure 4-15 2-Port N5290A System Simplified Block Diagram (201 and 205) 1. Your model PNA may not have available all of the LFE Options listed. 4-56 Keysight N5244B/45B Service Guide...
Page 151: 2-Port N5290A System Block Diagram (202 And 205)
Troubleshooting Instrument Simplified Block Diagrams – LFE 2-Port N5290A System Block Diagram (202 and 205) Figure 4-16 2-Port N5290A System Simplified Block Diagram (202 and 205) Keysight N5244B/45B Service Guide 4-57...
Page 152: 4-Port N5290A System Block Diagram (401)
Troubleshooting Instrument Simplified Block Diagrams – LFE 4-Port N5290A System Block Diagram (401) Figure 4-17 4-Port N5290A System Simplified Block Diagram (401) 4-58 Keysight N5244B/45B Service Guide...
Page 153 Troubleshooting Instrument Simplified Block Diagrams – LFE Figure 4-18 4-Port N5290A System Simplified Block Diagram (402) Keysight N5244B/45B Service Guide 4-59...
Page 154 Troubleshooting Instrument Simplified Block Diagrams – LFE Figure 4-19 4-Port N5290A System Simplified Block Diagram (403) 4-60 Keysight N5244B/45B Service Guide...
Page 155 Troubleshooting This page intentionally blank. Keysight N5244B/45B Service Guide 4-61...
Page 156: Instrument Block Diagrams - 2-Port (Sheet 1), Non-Lfe And Non-Dds
Instrument Block Diagrams – 2-Port (Sheet 1), Non-LFE and Non-DDS (Version 6 Synthesizers) Instrument Block Diagrams – 2-Port (Sheet 1), Non-LFE and Non-DDS (Version 6 Synthesizers) Microwave PNA-X, N5244/5B – 2-Port, Non-LFE and Non-DDS (Version 6 Synthesizers) 4-62 Keysight N5244B/45B Service Guide...
Page 157 REAR PANEL INTERCONNECTS N5244B and N5245B 4-Port Overall Block Diagram N5244B and N5245B 2-Port Overall Block Diagram FRONT PANEL FRONT PANEL INTERCONNECTS INTERCONNECTS Including Options 201-Standard; 217-Attenuators; A24 IF MULTIPLEXER A27 MIXER BRICK (1) IF = 0.826 MHz for CW Freq < 53 MHz 219-Attenuators and Bias Tees;...
Page 158: Instrument Block Diagrams - 2-Port (Sheet 2), Non-Lfe And Dds
Instrument Block Diagrams – 2-Port (Sheet 2), Non-LFE and DDS (Version 7 Synthesizer Assemblies) Instrument Block Diagrams – 2-Port (Sheet 2), Non-LFE and DDS (Version 7 Synthesizer Assemblies) Microwave PNA-X, N5244/5B – 2-Port, Non-LFE and DDS (Version 7 Synthesizer Assemblies) 4-64 Keysight N5244B/45B Service Guide...
Page 159 REAR PANEL INTERCONNECTS N5244B and N5245B 2-Port Overall Block Diagram FRONT PANEL FRONT PANEL INTERCONNECTS INTERCONNECTS Including Options 201-Standard; 217-Attenuators; A24 IF MULTIPLEXER A27 MIXER BRICK (1) IF = 0.826 MHz for CW Freq < 53 MHz 219-Attenuators and Bias Tees; IF = 7.438 MHz for CW Freq >...
Page 160: Instrument Block Diagrams - 4-Port (Sheet 3), Non-Lfe And Non-Dds (Version 6
Instrument Block Diagrams – 4-Port (Sheet 3), Non-LFE and Non-DDS (Version 6 Synthesizers) Instrument Block Diagrams – 4-Port (Sheet 3), Non-LFE and Non-DDS (Version 6 Synthesizers) Microwave PNA-X, N5244/5B – 4-Port, Non-LFE and Non-DDS (Version 6 Synthesizers) 4-66 Keysight N5244B/45B Service Guide...
Page 161 REAR PANEL INTERCONNECTS N5244B and N5245B 4-Port Overall Block Diagram FRONT PANEL FRONT PANEL INTERCONNECTS INTERCONNECTS Including Options 401-Standard; 417-Attenuators; A24 IF MULTIPLEXER A27 MIXER BRICK (1) IF = 0.826 MHz for CW Freq < 53 MHz 419-Attenuators and Bias Tees; IF = 7.438 MHz for CW Freq >...
Page 162: Microwave Pna-X, N5244/5B - 4-Port, Lfe And Non-Dds (Version 6 Synthesizers)
Instrument Block Diagrams – 4-Port (Sheet 4), LFE and Non-DDS (Version 6 Synthesizers) Instrument Block Diagrams – 4-Port (Sheet 4), LFE and Non-DDS (Version 6 Synthesizers) , LFE and Non-DDS Microwave PNA-X, N5244/5B – 4-Port (Version 6 Synthesizers) 4-68 Keysight N5244B/45B Service Guide...
Page 163 REAR PANEL INTERCONNECTS N5244B and N5245B 4-Port Overall Block Diagram FRONT PANEL FRONT PANEL INTERCONNECTS INTERCONNECTS Including Option 425-LFE, Attenuators, Combiner, Source Bypass Switches, Bias Combiners A24 IF MULTIPLEXER A27 MIXER BRICK (1) IF = 0.826 MHz for CW Freq < 53 MHz A46 STEP IF = 7.438 MHz for CW Freq >...
Page 164: Instrument Block Diagrams - 4-Port (Sheet 5), Non-Lfe And Dds
Instrument Block Diagrams – 4-Port (Sheet 5), Non-LFE and DDS (Version 7 Synthesizer Assemblies) Instrument Block Diagrams – 4-Port (Sheet 5), Non-LFE and DDS (Version 7 Synthesizer Assemblies) Microwave PNA-X, N5244/5B – 4-Port, Non-LFE and DDS (Version 7 Synthesizer Assemblies) 4-70 Keysight N5244B/45B Service Guide...
Page 165 REAR PANEL INTERCONNECTS N5244B and N5245B 4-Port Overall Block Diagram FRONT PANEL FRONT PANEL INTERCONNECTS INTERCONNECTS Including Options 401-Standard; 417-Attenuators; A24 IF MULTIPLEXER A27 MIXER BRICK (1) IF = 0.826 MHz for CW Freq < 53 MHz 419-Attenuators and Bias Tees; IF = 7.438 MHz for CW Freq >...
Page 166: Assemblies)
Instrument Block Diagrams – 4-Port (Sheet 6), LFE and DDS (Version 7 Synthesizer Assemblies) Instrument Block Diagrams – 4-Port (Sheet 6), LFE and DDS (Version 7 Synthesizer Assemblies) , LFE and DDS (Version 7 Microwave PNA-X, N5244/5B – 4-Port Synthesizer Assemblies) 4-72 Keysight N5244B/45B Service Guide...
Page 167 REAR PANEL INTERCONNECTS N5244B and N5245B 4-Port Overall Block Diagram FRONT PANEL FRONT PANEL INTERCONNECTS INTERCONNECTS Including Option 425-LFE, Attenuators, Combiner, Source Bypass Switches, Bias Combiners A24 IF MULTIPLEXER A27 MIXER BRICK (1) IF = 0.826 MHz for CW Freq < 53 MHz A46 STEP IF = 7.438 MHz for CW Freq >...
Page 168: Assemblies)
Troubleshooting Instrument Block Diagrams – 4-Port (Sheet 6), LFE and DDS (Version 7 Synthesizer Assemblies) 4-74 Keysight N5244B/45B Service Guide...
Page 169: Theory Of Operations
Keysight Microwave Network Analyzers 2-Port and 4-Port PNA-X Service Guide Theory of Operations Information in This Chapter This chapter provides a general description of the operating theory of the N524xB 2-port and 4-port PNA microwave network analyzers. — Theory of operation is explained to the assembly level only. —...
Page 170 Theory of Operations Information in This Chapter Section Title Summary of Content Start Page Digital Processing and Digital Operation of the assemblies associated with digital page 5-57 Control Group Operation processing and digital control. Power Supply Group Operation Operation of the power supply assembly group. page 5-62 Noise Measurement Group Operation of the assemblies associated with the Option 029...
Page 171: Network Analyzer System Operation
Theory of Operations Network Analyzer System Operation Network Analyzer System Operation The PNA network analyzer generates two (2-port models) or four (4-port models) phase-locked incident signals and an LO signal from the internal synthesized source. By means of signal separation, the incident signals are divided into reference signals and test signals.
Page 172 Theory of Operations Network Analyzer System Operation Figure 5-2 2-Port System Simplified Block Diagram Keysight N5244B/45B Service Guide...
Page 173 Theory of Operations Network Analyzer System Operation Figure 5-3 System Block Diagram Legend – LFE Block Diagrams Figure 5-4 4-Port N5290A System Simplified Block Diagram (401) – with LFE Keysight N5244B/45B Service Guide...
Page 174: Functional Groups Of The Network Analyzer
Theory of Operations Network Analyzer System Operation Figure 5-5 2-Port N5290A System Simplified Block Diagram (201 and 205) – with LFE Functional Groups of the Network Analyzer The operation of the network analyzer can be separated into major functional groups. Each group consists of assemblies that perform a distinct function in the instrument.
Page 175 2. Version 7 synthesizers: For PNA frequency ranges and maximum output power lev- els, refer to the section “Test Port Output” in the online Keysight document, “N5244/5B– (900 Hz) 10 MHz to 50 GHz Data Sheet and Technical Specifica- tions.” See the hyperlink above.
Page 176 2. Version 7 synthesizers: For PNA frequency ranges and maximum output power lev- els, refer to the section “Test Port Output” in the online Keysight document, “N5244/5B– (900 Hz) 10 MHz to 50 GHz Data Sheet and Technical Specifica- tions.” See the hyperlink above.
Page 177 Theory of Operations Network Analyzer System Operation — external connections for the DUT (configurable test set) — optional step attenuators in the source and receiver paths — optional mechanical switches — optional bias tees — optional bias tee combiners Refer to “Signal Separation Group Operation”...
Page 178: Synthesized Source Group Operation
Theory of Operations Synthesized Source Group Operation Synthesized Source Group Operation Version 6 Synthesizers: The source group produces a stable output signal by phase locking a synthesized voltage-controlled oscillator (VCO). For the full frequency range of the version 6 and below synthesizer sources, refer to the “Data Sheet and Technical Specifications”...
Page 179: Basic Operation
Theory of Operations Synthesized Source Group Operation — A23 Test Set Motherboard (including rear-panel interconnects) — A70 4-Port and A75 2-Port Low Frequency Extension (LFE) Board (including rear-panel interconnects) Basic Operation This section contains the following: — “Version 6 and Below Synthesizers Basic Operation” —...
Page 180 Theory of Operations Synthesized Source Group Operation test signals. This makes it possible for the LO signal to be tuned to a different frequency than the test signal. With frequency offset mode disabled, the LO signal is higher than the test signal. For analyzers with DSP version 4.0, the frequency value is 7.606 MHz.
Page 181 Theory of Operations Synthesized Source Group Operation Figure 5-6 Source Group – Version 6 and Below Synthesizers Keysight N5244B/45B Service Guide 5-13...
Page 182 Theory of Operations Synthesized Source Group Operation The following band table is for version 6 synthesizers and below. For version 7 synthesizers band values, refer to the table on Table 5-2 on page 5-20. Table 5-1 Version 6 and Below Synthesizers – Subsweep Frequencies Band Mixer ...
Page 183 Theory of Operations Synthesized Source Group Operation Table 5-1 Version 6 and Below Synthesizers – Subsweep Frequencies Band Mixer      Brick L.O. A4/A17 A5/A10 A7/A8/A1 Harmonic Synthesizer HMA26.5 Synthesizer Source 2/A13 Number Frequency Frequency Frequency Frequency 50GHz (GHz) (GHz)
Page 184 Theory of Operations Synthesized Source Group Operation Table 5-1 Version 6 and Below Synthesizers – Subsweep Frequencies Band Mixer      Brick L.O. A4/A17 A5/A10 A7/A8/A1 Harmonic Synthesizer HMA26.5 Synthesizer Source 2/A13 Number Frequency Frequency Frequency Frequency 50GHz (GHz) (GHz)
Page 185 Theory of Operations Synthesized Source Group Operation Table 5-1 Version 6 and Below Synthesizers – Subsweep Frequencies Band Mixer      Brick L.O. A4/A17 A5/A10 A7/A8/A1 Harmonic Synthesizer HMA26.5 Synthesizer Source 2/A13 Number Frequency Frequency Frequency Frequency 50GHz (GHz) (GHz)
Page 186 Theory of Operations Synthesized Source Group Operation Version 7 Direct Digital Synthesizer (DDS) Assembly – Basic Operation Table 5-2 on page 5-20 lists the L.O. harmonic number, the direct digital synthesizer (DDS) frequencies (A15), the main source frequency (A5 and A10), and the doubler frequencies (A7, A8, A12, and A13) within the analyzer for each band.
Page 187 Theory of Operations Synthesized Source Group Operation Figure 5-7 Source Group, Version 7, Part 1 (Example of Option 401 (top image) and Option 417 LFE (bottom image)) – N5247B is shown, but N5244/5B is similar. Keysight N5244B/45B Service Guide 5-19...
Page 188 Theory of Operations Synthesized Source Group Operation The following band table is for version 7 synthesizers. For version 6 synthesizers and below band values, refer to the table on Table 5-1 on page 5-14. Table 5-2 Version 7 Synthesizer Bands – Subsweep Frequencies Band Mixer ...
Page 189 Theory of Operations Synthesized Source Group Operation Table 5-2 Version 7 Synthesizer Bands – Subsweep Frequencies Band Mixer     Brick L.O. A5/A10 A7/A8/A12/A13 50 Harmonic Direct Digital HMA26.5 Source GHz Doubler Number Synthesizer (DDS) – Frequency (GHz) Frequency (GHz) Frequency (GHz) (GHz)
Page 190 Theory of Operations Synthesized Source Group Operation Table 5-2 Version 7 Synthesizer Bands – Subsweep Frequencies Band Mixer     Brick L.O. A5/A10 A7/A8/A12/A13 50 Harmonic Direct Digital HMA26.5 Source GHz Doubler Number Synthesizer (DDS) – Frequency (GHz) Frequency (GHz) Frequency (GHz) (GHz)
Page 191: A4, A15, And A17 13.5 Ghz Synthesizer Boards (S/N Prefixes <6021 Only)
Theory of Operations Synthesized Source Group Operation A4, A15, and A17 13.5 GHz Synthesizer Boards (S/N Prefixes 6021 < Only) On 2-ports models, the A17 13.5 GHz synthesizer board is optional and included only with Option 224. The A4, A15, and A17 13.5 GHz synthesizer boards use the 50 MHz reference signal from the A14 frequency reference board to tune two VCO circuits: one that sweeps from 2 GHz to 4 GHz and one that is set to a fixed CW frequency of 3.4 GHz.
Page 192 Theory of Operations Synthesized Source Group Operation The 100 MHz OCXO signal is coupled off to a divide-by-10 section and the resulting 10 MHz synchronized clock-signal is output from the DDS carrier board to the input of the A16 SPAM board (SPAM CLK) and to the rear panel (REF OUT).
Page 193: A5 And A10 26.5 Ghz Source Boards
Theory of Operations Synthesized Source Group Operation A5 and A10 26.5 GHz Source Boards On 2-port models, the A10 26.5 GHz source board is optional and included only with Option 224. In bands 2–19, the A5 and A10 26.5 GHz source boards input signals from the A4 or A17 13.5 GHz synthesizer board are passed through to both outputs (main and secondary) unchanged.
Page 194: A25 Multiplier/Amplifier 26.5 Board (Hma26.5)
Theory of Operations Synthesized Source Group Operation A25 Multiplier/Amplifier 26.5 Board (HMA26.5) In bands 2–28 and 36–39, the synthesized LO input is filtered, amplified, and passed through to the A26 splitter ( 6021 S/N prefixes, 4-port) or internal < splitter ( 4-port only).
Page 195: A23 Test Set Motherboard
Theory of Operations Synthesized Source Group Operation 10 MHz REF OUTPUT (s/n prefixes A BNC connector that allows a 10 MHz reference signal, produced by the A14 <6021 only) frequency reference board, to be output for use in phase locking external test equipment.
Page 196 Theory of Operations Synthesized Source Group Operation Table 5-3 TEST SET I/O Connector Pin Assignments DB-25 Female Connector Pin Numbers Name Function 0 V, ground reference TTL out, active low address strobe (1 μs min) 9–11 AD4–AD2 TTL I/O, address and latched data 0 V, ground reference Interrupt In TTL in, low level (10 μs min) aborts sweep...
Page 197 Theory of Operations Synthesized Source Group Operation Table 5-4 HANDLER I/O Connector Pin Assignments Rectangular 36-Pin Female Connector Pin Numbers Name Function 0 V, ground reference INPUT1 TTL in, negative pulse (1 ms min) latches OUTPUT1-2 3–4 OUTPUT1–2 TTL out, latched 5–12 Port A0–7 Out TTL out, latched...
Page 198: A70 4-Port And A75 2-Port Low Frequency Extension (Lfe) Board
Theory of Operations Synthesized Source Group Operation Table 5-5 PWR I/O Connector Pin Assignments DB-9 Female Connector Name Description +15V +15 V @ 400 mA -15V -15 V @ 400 mA AnalogOut1 Analog Output Voltage Programmable ±10 V @ 100 mA out Nominally 0 ohms 2.44 mV typical resolution 1 MHz BW...
Page 199 Theory of Operations Synthesized Source Group Operation The Low Frequency Extension (LFE) option in the PNA consists of an LFE board A70 4-port or A75 2-port) and a new 4-Port bias combiners (A70-A74). See also “A38–A41 60-dB Source Step Attenuators and A71–74 Bias Tee Combiners (Optional)”...
Page 200 Theory of Operations Synthesized Source Group Operation Figure 5-8 Block Diagram with Synthesizer Board and LFE Board Synthesizer Bias combiner 5-32 Keysight N5244B/45B Service Guide...
Page 201 Theory of Operations Synthesized Source Group Operation Figure 5-9 2-Port with LFE Synthesizer Bias combiners Figure 5-10 4-Port with LFE Synthesizer Synthesizer Bias combiners Keysight N5244B/45B Service Guide 5-33...
Page 202 Theory of Operations Synthesized Source Group Operation Figure 5-11 2-Port LFE with IF MUX Board Bias combiners Figure 5-12 4-Port LFE with IF MUX Board Bias combiners 5-34 Keysight N5244B/45B Service Guide...
Page 203 Theory of Operations Synthesized Source Group Operation Low Frequency Extension (LFE) – (Bands Table 1 of 2) –(Option 205/220/405/420/425 Only) – (S/N Prefix <6021 Only) See also “Low Frequency Extension (LFE) – (Bands Table (Continued) – 2 of 2) –(Option 205/220/405/420/425 Only) – (S/N Prefix <6021 Only)” on page 5-37.
Page 204 Theory of Operations Synthesized Source Group Operation Table 5-6 LFE Bands (1 of 2) – (S/N Prefix <6021 Only) Band Instrument Div / 4 Div / N Div / Total A4 / A13 Frequency Source (U1006) (DDS) Synthesizer Synthesizer (GHz)– (VCO) (LFE OUT) 0.48828 to 2,000 to 4,000...
Page 205 Theory of Operations Synthesized Source Group Operation Low Frequency Extension (LFE) – (Bands Table (Continued) – 2 of 2) –(Option 205/220/405/420/425 Only) – (S/N Prefix <6021 Only) See also “Low Frequency Extension (LFE) – (Bands Table 1 of 2) –(Option 205/220/405/420/425 Only) –...
Page 206 Theory of Operations Synthesized Source Group Operation Table 5-7 LFE Bands (2 of 2) – (S/N Prefix <6021 Only) Band IF Mode DIV / N Synth RF Synth RF Path Output Synthesizer (VCO) 1.0000 to Thru DDS_CLK 1.95313 1.95313 to DDS_CLK 3.90000 3.90000 to...
Page 207 Theory of Operations Synthesized Source Group Operation Low Frequency Extension (LFE) – (Bands Table 1 of 2) –(Option 205/220/405/420 Only) – (S/N Prefix ≥6021 Only) See also “Low Frequency Extension (LFE) – (Bands Table (Continued) – 2 of 2) –(Option 205/220/405/420 Only) – (S/N Prefix ≥6021 Only))” on page 5-40.
Page 208 Theory of Operations Synthesized Source Group Operation Low Frequency Extension (LFE) – (Bands Table (Continued) – 2 of 2) –(Option 205/220/405/420 Only) – (S/N Prefix ≥6021 Only)) See also “Low Frequency Extension (LFE) – (Bands Table 1 of 2) –(Option 205/220/405/420 Only) –...
Page 209 Theory of Operations Synthesized Source Group Operation Table 5-9 LFE Bands (2 of 2) – (S/N Prefix 6021 Only) ≥ Band A15 DDS IF Mode DIV / N Synth RF Synth RF Path Output Synthesizer (OCXO) 1.0000 to Thru DDS_CLK 1.95313 1.95313 to DDS_CLK...
Page 210 Figure 5-13 on page 5-43 shows an example of current frequency bands in a PNA. In an N5244/5B PNA, the IF frequency will change around 53 MHz. Figure 5-13 on page 5-43 shows the new structure of the frequency bands with the LFE option.
Page 211 Theory of Operations Synthesized Source Group Operation Figure 5-13 Frequency Bands Without LFE – Version 6 and Below Synthesizers (<6021) Figure 5-14 Frequency Bands with LFE – Version 6 and Below Synthesizers (<6021) Keysight N5244B/45B Service Guide 5-43...
Page 212: Signal Separation Group Operation
Theory of Operations Signal Separation Group Operation Signal Separation Group Operation The signal separation group divides the source incident signals into a reference path and a test path. Refer to Figure 5-15 on page 5-47 Figure 5-16 on page 5-48. —...
Page 213: A29-A32 Reference Couplers
Theory of Operations Signal Separation Group Operation — the A31 port 4 reference coupler and the A35 test port 4 coupler — the A32 port 2 reference coupler and the A36 test port 2 coupler — the A33 test port 1 coupler and the A27 mixer brick receiver A —...
Page 214 Theory of Operations Signal Separation Group Operation The coupled arm of the couplers carries the signal reflected from or transmitted through the DUT, to the receiver for measurement (through front panel jumpers), as inputs A, B, C, and D for 4-port models or inputs A and B for 2-port models.
Page 215 Theory of Operations Signal Separation Group Operation Figure 5-15 4-Port Signal Separation Group Keysight N5244B/45B Service Guide 5-47...
Page 216 Theory of Operations Signal Separation Group Operation Figure 5-16 2-Port Signal Separation Group 5-48 Keysight N5244B/45B Service Guide...
Page 217: A38-A41 60-Db Source Step Attenuators And A42-A45 Bias Tees (Optional)
Theory of Operations Signal Separation Group Operation A38–A41 60-dB Source Step Attenuators and A42–A45 Bias Tees (Optional) On 4-port models with Option 419 or 423, a step attenuator and a bias tee are placed in the signal path of each test port between the A29–A32 reference couplers and the A33–A36 test port couplers.
Page 218 Theory of Operations Signal Separation Group Operation These switches allow the source signal to be routed to or from rear-panel connectors. The internal source signal can be sent out through a rear-panel connector to be made available for external use or an external source signal can be input through a rear-panel connector to be used in place of the internal source signal.
Page 219: Receiver Group Operation
Theory of Operations Receiver Group Operation Receiver Group Operation The receiver group measures and processes the input signals into digital information for processing and eventual display. Figure 5-17 on page 5-55 Figure 5-18 on page 5-56 are simplified block diagrams of the receiver functional group for 2-port and 4-port analyzers respectively.
Page 220: A24 If Multiplexer Board
Theory of Operations Receiver Group Operation signal that is a frequency value higher than the source incident signal to produce an IF signal. For analyzers with DSP version 4.0, the IF is 7.606 MHz (at frequencies below 53 MHz the IF is 2.535 MHz). For analyzers with DSP version 5.0, the IF is 7.438 MHz (at frequencies below 53 MHz the IF is 0.826 MHz).
Page 221: A16 Spam Board (Analog Description)
Theory of Operations Receiver Group Operation Table 5-10 PULSE I/O Connector Pin Assignments DB-15 Female Connector Name Description IFGateCin IF pulse gate input C (TTL) IFGateDin IF pulse gate input D (TTL) IFGateRin IF pulse gate input R (TTL) DCOM Digital ground PulseSyncIn Pulse generator synchronization trigger input (TTL)
Page 222 Theory of Operations Receiver Group Operation The processed and formatted data is finally routed to the display, and to the general-purpose interface bus (GPIB) for remote operation. Refer to “Digital Processing and Digital Control Group Operation” on page 5-57 for more information on signal processing.
Page 223 Theory of Operations Receiver Group Operation Figure 5-17 4-Port Receiver Group Keysight N5244B/45B Service Guide 5-55...
Page 224 Theory of Operations Receiver Group Operation Figure 5-18 2-Port Receiver Group 5-56 Keysight N5244B/45B Service Guide...
Page 225: Digital Processing And Digital Control Group Operation
Theory of Operations Digital Processing and Digital Control Group Operation Digital Processing and Digital Control Group Operation The digital processor and control group provides digital control for the entire analyzer. It provides: — front panel operation, — output to the display, —...
Page 226 Theory of Operations Digital Processing and Digital Control Group Operation Figure 5-19 Digital Processing and Digital Control Group 5-58 Keysight N5244B/45B Service Guide...
Page 227: Front Panel Subgroup
Theory of Operations Digital Processing and Digital Control Group Operation Front Panel Subgroup The front panel subgroup contains the following assemblies: — A1 Front Panel Display Board — A2 USB Board — A3 Display Assembly — Keypad Assembly A1 Front Panel Display Board The A1 front panel display board detects and decodes user inputs from the keypad assembly and front panel knob, and transmits them to the A21 CPU board by way of the A18 system motherboard.
Page 228: Data Acquisition And Processing Subgroup
Theory of Operations Digital Processing and Digital Control Group Operation Keypad Assembly The keypad assembly provides user interface to the analyzer. The front panel rotary pulse generator (RPG) knob is not electrically connected to the keypad, but rather provides user inputs directly to the front panel processor. Data Acquisition and Processing Subgroup The data acquisition and processing subgroup contain the following assemblies.
Page 229 Theory of Operations Digital Processing and Digital Control Group Operation Main RAM The main random access memory (RAM) is shared memory for the CPU and the DSP. It stores the raw data received from the DSP while additional calculations are performed on it by the CPU. The CPU reads the resulting formatted data from the main RAM, converts it to a user-definable display format, and writes this to the video processor for display.
Page 230: Power Supply Group Operation
Theory of Operations Power Supply Group Operation Power Supply Group Operation The A20 power supply assembly is a switching power supply operating at 103 kHz switching frequency. The input power ranges for the power supply are 90 to 132 Vac or 195 to 250 Vac. The power supply automatically senses the input voltage and switches between these two ranges.
Page 231: A56 Test Port 1 Option 029 Switch
Theory of Operations Noise Measurement Group Operation (Option S93029A) — A64 Test Port 1 Option 029 Tuner — A57 Test Port 2 Option 029 Switch — A59 Noise Receiver (Downconverter) — A9 Noise Receiver Board A56 Test Port 1 Option 029 Switch The A56 bypass switch is placed in the Port 1 source path, allowing the source signal to be switched between normal test mode configuration and internal noise tuner configuration.
Page 232 Theory of Operations Noise Measurement Group Operation (Option S93029A) synthesized signal to produce IF noise signals. These are filtered and sent to the ADC for sampling. In the ADC, the signals are processed and converted to digital form at the sampling rate of 40 MHz. The digitized data is then sent to the A18 system motherboard via the data bus.
Page 233 Theory of Operations Noise Measurement Group Operation (Option S93029A) Figure 5-20 Noise Measurement Group (Option 029) Keysight N5244B/45B Service Guide 5-65...
Page 234 Theory of Operations Noise Measurement Group Operation (Option S93029A) 5-66 Keysight N5244B/45B Service Guide...
Page 235: Replaceable Parts
Keysight Microwave Network Analyzers 2-Port and 4-Port PNA-X Service Guide Replaceable Parts Before replacing the A23 board, if possible: Run EEBackup.exe at directory C:/Program Files (x86)/Agilent/Network Analyzer/Service/EEBackup.exe. Click on Save EEPROM Backup, and then click on Backup TSMB Memory. If it is not possible to back up the EEPROMs and the TSMB Memory, the data files might not be the most current.
Page 236: Information In This Chapter
Rebuilt-Exchange Assemblies The definition of a rebuilt-exchange assembly. page 6-5 The procedure for replacing and returning a defective assembly to Keysight Technologies. Replaceable Parts Listings Tables that list the assemblies by reference designator with page 6-7 their associated part number and description.
Page 237: Ordering Information
Ordering Information To order a part listed in the replaceable parts lists: — include the part number — indicate the quantity required — Contact Keysight Technologies for instructions on where to send the order. Refer to “Contacting Keysight” on page 2-7.
Page 238: Assembly Replacement Sequence
Replaceable Parts Assembly Replacement Sequence Assembly Replacement Sequence The following steps describe how to replace an assembly in the network analyzer. Step 1. Identify the faulty group. Begin with Chapter 4, “Troubleshooting.” Follow up with the appropriate troubleshooting chapter that identifies the faulty assembly.
Page 239: Rebuilt-Exchange Assemblies
Replaceable Parts Rebuilt-Exchange Assemblies Rebuilt-Exchange Assemblies Under the rebuilt-exchange assembly program: — Certain factory-repaired and tested assemblies are available on a trade-in basis. — Exchange assemblies are offered for lower cost than a new assembly, but meet all factory specifications required of a new assembly. —...
Page 240 Replaceable Parts Rebuilt-Exchange Assemblies Figure 6-1 Module Exchange Procedure Keysight N5244B/45B Service Guide...
Page 241: Replaceable Parts Listings
Replaceable Parts Replaceable Parts Listings Replaceable Parts Listings This section contains the replacement part numbers and their descriptions for your Keysight microwave PNA. You can find the locations of replaceable parts in this section: — listed by reference designator in Table 6-1, or —...
Page 242 Replaceable Parts Replaceable Parts Listings Table 6-1 Part Number Listing by Reference Designator (Continued) Reference Description Location Designator 13.5 GHz source 1 synthesizer board (Applies to PNA “Top Assemblies and Cables, All models with serial numbers <6021 only) Options:” on page 6-11 26.5 GHz source board 1 Not used Doubler 1 board...
Page 243 Replaceable Parts Replaceable Parts Listings Table 6-1 Part Number Listing by Reference Designator (Continued) Reference Description Location Designator Mixer Brick 2 Port 1 reference coupler Port 3 reference coupler Port 4 reference coupler Port 2 reference coupler Port 1 test port coupler Port 3 test port coupler Port 4 test port coupler Port 2 test port coupler...
Page 244 Replaceable Parts Replaceable Parts Listings Table 6-1 Part Number Listing by Reference Designator (Continued) Reference Description Location Designator Noise bypass switch, port 1 (Option 029 only) Your option set determines which assemblies are in your PNA. Refer to Noise bypass switch, port 2 (Option 029 only) “Bottom Assemblies and Cables by Bridge (Option 029 only) Option Set:”...
Page 245 Replaceable Parts Replaceable Parts Listings Table 6-2 Part Number Listing by Type of Part Assemblies and Cables — “Front Panel Assembly, Front Side, All Options” on page 6-13 — “Front Panel Assembly, Back Side, All Options” on page 6-15 — Top Assemblies and Cables, All Options: —...
Page 246 Replaceable Parts Replaceable Parts Listings This page intentionally left blank. 6-12 Keysight N5244B/45B Service Guide...
Page 247: Front Panel Assembly, Front Side, All Options
Lower front panel overlay, 4-port (Option 422 with 029) N5245-80033 Lower front panel overlay, 2-port (Options 222 with 029) N5245-80030 Lower front panel overlay, 4-port (Options 423 with 029) N5245-80037 Dress panel, overlay 4-port (Option 405/420/425, N5244/5B) W1312-40180 Front (RPG) knob  N5245-80026 Nameplate, N5245B ...
Page 248 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Designator N5240-40002   Trim, bottom, goes on the outside, underneath the Front Frame frame ( (All PNA models) 0515-1946 Machine screw, M3 x 6 mm flat head (To attach lower dress panel overlay ...
Page 249: Front Panel Assembly, Back Side, All Options
Replaceable Parts Replaceable Parts Listings Front Panel Assembly, Back Side, All Options Reference Part Number Description Designator N5240-63081 Front panel interface board N5240-63082 USB board not shown N5240-60090 Ribbon cable, 60-wire, A14 system motherboard J9 to A1 front panel interface board J1 N5240-40004 Keypad assembly ...
Page 250 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Designator 0515-2151 Machine screw, M2.0 x 4mm pan head (4 -2 for each bracket - to attach LCD side bracket(s) to 2090-1140 LCD) N5242-00046 LCD display side bracket (in Figure 6-5 on page 6-18, only one bracket (LCD) is shown.)
Page 251 Replaceable Parts Replaceable Parts Listings Figure 6-4 A3 Display Assembly with Interface Board/USB Assemblies Keysight N5244B/45B Service Guide 6-17...
Page 252 Replaceable Parts Replaceable Parts Listings Figure 6-5 A3 Display Assembly with LCD Display 2090-1140 (LED) and Side Brackets 6-18 Keysight N5244B/45B Service Guide...
Page 253: Top Assemblies And Cables, All Options, Serial Number Prefixes <6021
Replaceable Parts Replaceable Parts Listings Top Assemblies and Cables, All Options, Serial Number Prefixes <6021 This section contains the following: — “Top Assemblies, All Options, S/N Prefixes <6021” on page 6-19 — “Top Cables, All Cables—All Options, S/N Prefixes <6021” on page 6-24 See also, “Top Assemblies and Cables, All Options, Serial Number Prefixes ≥6021”...
Page 254 Replaceable Parts Replaceable Parts Listings Referenc Serial Part Number Description Number Prefixes Designat Affected Not used. All prefixes 5087-7349 Doubler assembly port 1 Was 5087-7318 5087-6349 All prefixes 5087-7349 Doubler assembly port 2 Was 5087-7318 5087-6349 All prefixes Noise board N5245-60125 Was: N5242-60098 (Option 029 only)
Page 255 Replaceable Parts Replaceable Parts Listings Referenc Serial Part Number Description Number Prefixes Designat Affected 5201 and above N5240-60074 13.5 GHz (source 2) synthesizer board (On 2-port models, this assembly is included only with Option 224.) Was:N5242-60150 5150 and below N5240-60076 Was N5242-60166, or N5230-60002 5201 and above...
Page 256 Replaceable Parts Replaceable Parts Listings b. If any N5230-60002 13.5 GHz Synthesizer board in your PNA is replaced with the RoHS compliant N5240-60076 board, you must replace ALL of the other N5230-60002 boards. To help lower the price for customers who must replace three synthesizer boards in their PNA-X, Keysight provides kit N5242-60168 - containing three N5240-60076 boards - at a discounted price.
Page 257 Replaceable Parts Replaceable Parts Listings Figure 6-6 Top Assemblies, All Options, S/N Prefixes <6021 Keysight N5244B/45B Service Guide 6-23...
Page 258 Replaceable Parts Replaceable Parts Listings Top Cables, All Cables—All Options, S/N Prefixes <6021 Ref. Part Number Description Type Desig. N5245-20114 A4 13.5 GHz (source 1) synthesizer board J1207 to A5 26.5 GHz source (1) board P1 N5245-20100 A10 source (2) P1 to A17 13.5 GHz source (2) synthesizer J1207 (On 2-port models, W2 is included only with Opt.
Page 259 Replaceable Parts Replaceable Parts Listings Ref. Part Number Description Type Desig. N5242-60029 A14 frequency reference board J6 to A4 13.5 GHz (source 1) synthesizer board N5242-60030 A14 frequency ref (J7) to A17 13.5 GHz (source 2) synth (J5) (On 2-port models, W77 is included only with Option 224.) 8120-5063 A14 frequency reference board J3 to rear-panel 10 MHz REF OUT...
Page 260 Replaceable Parts Replaceable Parts Listings Figure 6-7 Top Cables, All Cables—All Options, S/N Prefixes <6021 6-26 Keysight N5244B/45B Service Guide...
Page 261: Top Assemblies And Cables, All Options, Serial Number Prefixes ≥6021
Replaceable Parts Replaceable Parts Listings Top Assemblies and Cables, All Options, Serial Number Prefixes ≥6021 This section contains the following: — “Top Assemblies, All Options, S/N Prefixes ≥6021” on page 6-27 — “Top Cables, All Cables—All Options, S/N Prefixes ≥6021” on page 6-31 See also, “Top Assemblies and Cables, All Options, Serial Number Prefixes <6021”...
Page 262 Replaceable Parts Replaceable Parts Listings Referenc Serial Part Number Description Number Prefixes Designat Affected All prefixes 5087-7349 Doubler assembly port 2 Was 5087-7318 5087-6349 All prefixes Noise board N5245-60125 Was: N5242-60098 (Option 029 only) N5245-60124 (Option 029 only) All prefixes 5087-7780 26.5 GHz source (2) board (On 2-port models, this assembly is included only with Opt 224.)
Page 263 Replaceable Parts Replaceable Parts Listings Referenc Serial Part Number Description Number Prefixes Designat Affected All prefixes – W1312-60522 CPU board assembly Version 8 All prefixes – W1312-60213 Version 7 Was: W1312-60211 Was: W1312-60210 All prefixes N5240-60059 GPIB board Was N5240-60052 All prefixes –...
Page 264 Replaceable Parts Replaceable Parts Listings Figure 6-8 Top Assemblies, All Options, S/N Prefixes ≥6021 6-30 Keysight N5244B/45B Service Guide...
Page 265 Replaceable Parts Replaceable Parts Listings Top Cables, All Cables—All Options, S/N Prefixes ≥6021 Ref. Part Number Description Type Desig. N5240-20124 A15 13.5 GHz (source 1) DD synthesizer (DDS) board SRC (J4) to A5 26.5 GHz source (1) board SRC 1 RF IN N5240-20126 A15 13.5 GHz (source 2) DD synthesizer (DDS) board SRC (J6) to A10 26.5 GHz source (2) DD synthesizer board SRC 2 RF IN (4-port)
Page 266 Replaceable Parts Replaceable Parts Listings Ref. Part Number Description Type Desig. 8120-5063 A15 DD synthesizer board J10 to rear-panel REF OUT Rear-panel REF IN to A15 DD synthesizer board J9 W149 N5247-60023 A24 IF multiplexer board P603 to A16 SPAM board J2 (SPAM 5, 2-port) W150 N5247-60024 A24 IF multiplexer board P203 to A16 SPAM board J5 (SPAM 5, 2-port)
Page 267 Replaceable Parts Replaceable Parts Listings Figure 6-9 Top Cables, All Cables—All Options, S/N Prefixes ≥6021 Keysight N5244B/45B Service Guide 6-33...
Page 268 Replaceable Parts Replaceable Parts Listings 2-Port Configurations, Serial Number Prefixes <6021 This section contains the following: — “2-Port Configuration, Option 201, S/N Prefixes <6021” on page 6-34 — “2-Port Configuration, Options 217, S/N Prefixes <6021” on page 6-42 — “2-Port Configuration, Options 219, S/N Prefixes <6021” on page 6-50 —...
Page 269 Replaceable Parts Replaceable Parts Listings Reference Description Part Number Designator 5087-7765 LO Multiplier/amplifier 26.5 (HMA26.5) Was 5087-7711 5087-7417 Mixer brick 5087-6417 Was: 5087-7323 Was: 5087-6323 5087-7760 Test port 1 reference coupler Test port 2 reference coupler Was 5086-7658 5087-7793 Test port 1 coupler Test port 2 coupler Was 5087-7724 5087-7759...
Page 270 Replaceable Parts Replaceable Parts Listings Figure 6-10 Bottom Assemblies, Standard 2-Port Configuration, Option 201, S/N Prefixes <6021 6-36 Keysight N5244B/45B Service Guide...
Page 271 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, Standard 2-Port Configuration, Option 201, S/N Prefixes <6021 Reference Part Number Description Type Designator N5245-20109 A29 port 1 reference coupler to W11 N5245-20111 A32 port 2 reference coupler to W17 N5245-20039 A29 port 1 reference coupler to front-panel Port 1 SOURCE OUT N5245-20045 Port 1 CPLR THRU to A33 port 1 coupler N5245-20120...
Page 272 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator W148 N5242-60026 A27 mixer brick (R2) to A24 IF multiplexer (P801) a. SR = semirigid coaxial cable; F = flexible coaxial cable b. On instruments with a new HMA26.5 the N5245-20048 cable is used in all 2-port and 4-port instruments. And, on instruments with legacy HMA26.5, N5245-20150 is used on all 2-port instruments with Option 029.
Page 273 Replaceable Parts Replaceable Parts Listings Figure 6-11 Bottom RF Cables, Standard 2-Port Configuration, Option 201, S/N Prefixes <6021 Keysight N5244B/45B Service Guide 6-39...
Page 274 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, Standard 2-Port Configuration, Option 201, S/N Prefixes <6021 Reference Part Number Description Type Designator N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301  8121-0966 A23 test set motherboard J554 to A37 reference mixer switch ...
Page 275 Replaceable Parts Replaceable Parts Listings Figure 6-12 Bottom Ribbon Cables and Wire Harnesses, Standard 2-Port Configuration, Option 201, S/N Prefixes <6021 Keysight N5244B/45B Service Guide 6-41...
Page 276 Replaceable Parts Replaceable Parts Listings 2-Port Configuration, Options 217, S/N Prefixes <6021 The following may apply to your B model PNA: In August 2020, the N5224/44B and N5225/45B analyzers underwent multiple hardware changes. Some instruments that have A25 – 5087-7765 HMA26.5 multiplier amplifier (with a discrete A26 power splitter and some semi-rigid cables) and A27/A28 –...
Page 277 Replaceable Parts Replaceable Parts Listings Reference Description Part Number Designator N5240-60058 Front panel LED board  Was N5240-60051 a. Part numbers in italic typeface are for rebuilt exchange assemblies. Refer to “Rebuilt-Exchange Assemblies” on page 6-5. b. All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2.
Page 278 Replaceable Parts Replaceable Parts Listings Figure 6-13 Bottom Assemblies, 2-Port, Options 217, S/N Prefixes <6021 6-44 Keysight N5244B/45B Service Guide...
Page 279 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 2-Port, Options 217, S/N Prefixes <6021 Reference Part Number Description Type Designator N5245-20050 A29 port 1 reference coupler to W11 N5245-20049 A32 port 2 reference coupler to W17 N5245-20045 Front panel port 1 CPLR THRU to A33 port 1 coupler N5245-20118 A29 port 1 reference coupler to A37 reference mixer switch N5245-20025...
Page 280 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator W103 N5245-20055 Port 2 RCVR B IN to A49 port 2 receiver attenuator W104 N5245-20057 A49 port 2 receiver attenuator to A27 mixer brick (B) W147 N5242-60025 A27 mixer brick (R1) to A24 IF multiplexer (P601) W148 N5242-60026 A27 mixer brick (R2) to A24 IF multiplexer (P801)
Page 281 Replaceable Parts Replaceable Parts Listings Figure 6-14 Bottom RF Cables, 2-Port, Options 217, S/N Prefixes <6021 Keysight N5244B/45B Service Guide 6-47...
Page 282 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, 2-Port, Options 217, S/N Prefixes <6021 Reference Part Number Description Type Designator N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301  N5245-60026 A23 test set motherboard J205 to A46 port 1 receiver attenuator ...
Page 283 Replaceable Parts Replaceable Parts Listings Figure 6-15 Bottom Ribbon Cables and Wire Harnesses, 2-Port, Options 217, S/N Prefixes <6021 – Bias Tees Require Option 219 – Ignore Bias Tees for Option 217 Keysight N5244B/45B Service Guide 6-49...
Page 284 Replaceable Parts Replaceable Parts Listings 2-Port Configuration, Options 219, S/N Prefixes <6021 The following may apply to your B model PNA: In August 2020, the N5224/44B and N5225/45B analyzers underwent multiple hardware changes. Some instruments that have A25 – 5087-7765 HMA26.5 multiplier amplifier (with a discrete A26 power splitter and some semi-rigid cables) and A27/A28 –...
Page 285 Replaceable Parts Replaceable Parts Listings Reference Description Part Number Designator 33325-60023 Port 1 receiver attenuator Port 2 receiver attenuator Was 33325-60017 Was 33325-60011 N5240-60058 Front panel LED board  Was N5240-60051 “Rebuilt-Exchange Assemblies” on a. Part numbers in italic typeface are for rebuilt exchange assemblies. Refer to page 6-5 b.
Page 286 Replaceable Parts Replaceable Parts Listings Figure 6-16 Bottom Assemblies, 2-Port, Options 219, S/N Prefixes <6021 6-52 Keysight N5244B/45B Service Guide...
Page 287 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 2-Port, Option 219, S/N Prefixes <6021 Reference Part Number Description Type Designator N5245-20050 A29 port 1 reference coupler to W11 N5245-20049 A32 port 2 reference coupler to W17 N5245-20118 A29 port 1 reference coupler to A37 reference mixer switch N5245-20025 A33 port 1 coupler to front-panel REF 1 CPLR ARM N5245-20010...
Page 288 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5245-20054 Front-panel Port 1 RCVR A IN to A46 port 1 receiver attenuator N5245-20056 A46 port 1 receiver attenuator to A27 mixer brick (A) W103 N5245-20055 Port 2 RCVR B IN to A49 port 2 receiver attenuator W104 N5245-20057 A49 port 2 receiver attenuator to A27 mixer brick (B)
Page 289 Replaceable Parts Replaceable Parts Listings Figure 6-17 Bottom RF Cables, 2-Port, Option 219, S/N Prefixes <6021 Keysight N5244B/45B Service Guide 6-55...
Page 290 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 219, S/N Prefixes <6021 Reference Part Number Description Type Designator N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301  N5245-60026 A23 test set motherboard J205 to A46 port 1 receiver attenuator ...
Page 291 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 219 , S/N Prefixes Figure 6-18 <6021 Keysight N5244B/45B Service Guide 6-57...
Page 292 Replaceable Parts Replaceable Parts Listings 2-Port Configuration, Option 222 with and without Option 029, S/N Prefixes <6021 The following may apply to your B model PNA: In August 2020, the N5224/44B and N5225/45B analyzers underwent multiple hardware changes. Some instruments that have A25 – 5087-7765 HMA26.5 multiplier amplifier (with a discrete A26 power splitter and some semi-rigid cables) and A27/A28 –...
Page 293 Replaceable Parts Replaceable Parts Listings Reference Description Part Number Designator 33325-60023 Port 1 receiver attenuator Port 2 receiver attenuator Was 33325-60017 Was 33325-60011 N1811-60033 Port 1 mechanical switch SRC2 OUT1 mechanical switch Was N1811-60031 Port 2 mechanical switch Was N1811-60009 11667-60021 Combiner Was N5532-60002...
Page 294 Replaceable Parts Replaceable Parts Listings Bottom Assemblies, 2-Port, Option 222 with and without 029, S/N Prefixes Figure 6-19 <6021 A56, A57, A59, and A64 only with Option 029. 6-60 Keysight N5244B/45B Service Guide...
Page 295 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 2-Port, Option 222 with and without 029, S/N Prefixes <6021 Reference Part Number Description Type Designator N5245-20045 Port 1 CPLR THRU to A33 port 1 coupler (Option 222 withOUT Option 029) N5245-20118 A29 port 1 reference coupler to A37 reference mixer switch N5245-20025 A33 port 1 coupler to front-panel Port 1 CPLR ARM...
Page 296 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator W103 N5245-20055 Port 2 RCVR B IN to A49 port 2 receiver attenuator W104 N5245-20057 A49 port 2 receiver attenuator to A27 mixer brick (B) W105 N5245-20064 A50 port 1 mechanical switch to W11 W106 N5245-20065 A50 port 1 mechanical switch to A29 port 1 reference coupler...
Page 297 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator W166 N5245-20080 A57 port 2 noise bypass switch to port 2 CPLR THRU (Option 029 only) W168 N5245-20146 A59 noise receiver (downconverter) to A57 port 2 noise bypass switch (Option 029 only) W169 N5245-20147 A59 noise receiver (downconverter) to A57 port 2 noise bypass...
Page 298 Replaceable Parts Replaceable Parts Listings Figure 6-20 Bottom RF Cables, 2-Port, Options 222, S/N Prefixes <6021 6-64 Keysight N5244B/45B Service Guide...
Page 299 Replaceable Parts Replaceable Parts Listings Figure 6-21 Bottom RF Cables, 2-Port, Option 222 with Option 029, S/N Prefixes <6021 Keysight N5244B/45B Service Guide 6-65...
Page 300 Replaceable Parts Replaceable Parts Listings This page intentionally left blank. 6-66 Keysight N5244B/45B Service Guide...
Page 301 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 222 with and without 029, S/N Prefixes <6021 Reference Part Number Description Type Designator N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301  N5245-60021 A64 tuner J9 to A23 test set motherboard J7 ...
Page 302 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5245-60018 A59 noise receiver (downconverter) J1 port 1 to A23 test set motherboard J550 (Option 029 only) N5230-60014 A23 test set motherboard J209 to A25 HMA26.5 J1 Was N5242-60011 100R N5242-60004 A18 system motherboard J1 to A23 test set motherboard J1 to...
Page 303 Replaceable Parts Replaceable Parts Listings Figure 6-22 Bottom Ribbon Cables and Wire Harnesses, 2-Pt, Option 222 with and without Option 029 , S/N Prefixes <6021 Cables 10, 13, 14, and 16 apply only with Option 029. Keysight N5244B/45B Service Guide 6-69...
Page 304 Replaceable Parts Replaceable Parts Listings 2-Port Configuration, Option 224 with and without Option 029, S/N Prefixes <6021 The following may apply to your B model PNA: In August 2020, the N5224/44B and N5225/45B analyzers underwent multiple hardware changes. Some instruments that have A25 – 5087-7765 HMA26.5 multiplier amplifier (with a discrete A26 power splitter and some semi-rigid cables) and A27/A28 –...
Page 305 Replaceable Parts Replaceable Parts Listings Reference Description Part Number Designator 5087-7789 Test port 1 bias tee (includes wire harness) Test port 2 bias tee (includes wire harness) Was 5087-7331 33325-60023 Port 1 receiver attenuator Port 2 receiver attenuator Was 33325-60017 Was 33325-60011 N1811-60033 Port 1 mechanical switch...
Page 306 Replaceable Parts Replaceable Parts Listings Figure 6-23 Bottom Assemblies, 2-Port, Option 224 with and without Option 029, S/N Prefixes <6021 A56, A57, A59, and A64 only with Option 029. 6-72 Keysight N5244B/45B Service Guide...
Page 307 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 2-Port, Option 224 with and without 029, S/N Prefixes <6021 Reference Part Number Description Type Designator N5245-20118 A29 port 1 reference coupler to A37 reference mixer switch N5245-20025 A33 port 1 coupler to front-panel Port 1 CPLR ARM N5245-20010 A32 port 2 reference coupler to front-panel REF 2 SOURCE OUT N5245-20024...
Page 308 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5245-20047 A45 port 2 bias tee to A36 port 2 coupler N5245-20054 Front-panel Port 1 RCVR A IN to A46 port 1 receiver attenuator N5245-20056 A46 port 1 receiver attenuator to A27 mixer brick (A) W103 N5245-20055 Port 2 RCVR B IN to A49 port 2 receiver attenuator...
Page 309: 2-Port Configurations, Serial Number Prefixes <6021
Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator W167 N5245-20105 A57 port 2 noise bypass switch to A45 port 2 bias tee W168 N5245-20146 A59 noise receiver (downconverter) to A57 port 2 noise bypass switch (Option 029 only) W169 N5245-20147 A59 noise receiver (downconverter) to A57 port 2 noise bypass...
Page 310 Replaceable Parts Replaceable Parts Listings Figure 6-24 Bottom RF Cables, 2-Port, Option 224, S/N Prefixes <6021 6-76 Keysight N5244B/45B Service Guide...
Page 311 Replaceable Parts Replaceable Parts Listings Figure 6-25 Bottom RF Cables, 2-Port, Option 224 with Option 029, S/N Prefixes <6021 Keysight N5244B/45B Service Guide 6-77...
Page 312 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 224 with and without 029, S/N Prefixes <6021 Reference Part Number Description Type Designator N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301  N5245-60021 A64 tuner J9 to A23 test set motherboard J7 ...
Page 313 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5245-60026 A23 test set motherboard J208 to A49 port 2 receiver attenuator Was 8121-0982, N5242-60007 N5245-60018 A59 noise receiver (downconverter) J1 port 1 to A23 test set motherboard J550. (Option 029 only) N5230-60014 A23 test set motherboard J209 to A25 HMA26.5 J1 Was N5242-60011...
Page 314 Replaceable Parts Replaceable Parts Listings Figure 6-26 Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 224 with and without 029, S/N Prefixes <6021 Cables 10, 14, 15, and 18 are only with Option 029. 6-80 Keysight N5244B/45B Service Guide...
Page 315: 2-Port Configurations, Serial Number Prefix ≥6021
Replaceable Parts Replaceable Parts Listings 2-Port Configurations, Serial Number Prefix ≥6021 This section contains the following: — “2-Port Configuration, Option 201, S/N Prefixes ≥6021” on page 6-81 — “2-Port Configuration, Options 217, S/N Prefixes ≥6021” on page 6-89 — “2-Port Configuration, Options 219, S/N Prefixes ≥6021” on page 6-97 —...
Page 316 Replaceable Parts Replaceable Parts Listings Reference Description Part Number Designator 5087-7417 Mixer brick 5087-6417 Was: 5087-7323 Was: 5087-6323 5087-7760 Test port 1 reference coupler Test port 2 reference coupler Was 5086-7658 5087-7793 Test port 1 coupler Test port 2 coupler Was 5087-7724 5087-7759 Reference mixer switch...
Page 317 Replaceable Parts Replaceable Parts Listings Figure 6-27 Bottom Assemblies, Standard 2-Port Configuration, Option 201, S/N Prefixes ≥6021 Keysight N5244B/45B Service Guide 6-83...
Page 318 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, Standard 2-Port Configuration, Option 201, S/N Prefixes ≥6021 Reference Part Number Description Type Designator N5245-20109 A29 port 1 reference coupler to W11 N5245-20111 A32 port 2 reference coupler to W17 N5245-20039 A29 port 1 reference coupler to front-panel Port 1 SOURCE OUT N5245-20045 Port 1 CPLR THRU to A33 port 1 coupler N5245-20120...
Page 319 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator W147 N5242-60025 A27 mixer brick (R1) to A24 IF multiplexer (P601) W148 N5242-60026 A27 mixer brick (R2) to A24 IF multiplexer (P801) a. SR = semirigid coaxial cable; F = flexible coaxial cable b.
Page 320 Replaceable Parts Replaceable Parts Listings Figure 6-28 Bottom RF Cables, Standard 2-Port Configuration, Option 201, S/N Prefixes ≥6021 6-86 Keysight N5244B/45B Service Guide...
Page 321 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, Standard 2-Port Configuration, Option 201, S/N Prefixes ≥6021 Reference Part Number Description Type Designator N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301  8121-0966 A23 test set motherboard J554 to A37 reference mixer switch ...
Page 322 Replaceable Parts Replaceable Parts Listings Figure 6-29 Bottom Ribbon Cables and Wire Harnesses, Standard 2-Port Configuration, Option 201, S/N Prefixes ≥6021 6-88 Keysight N5244B/45B Service Guide...
Page 323 Replaceable Parts Replaceable Parts Listings 2-Port Configuration, Options 217, S/N Prefixes ≥6021 The following may apply to your B model PNA: In August 2020, the N5224/44B and N5225/45B analyzers underwent multiple hardware changes. Some instruments that have A25 – 5087-7765 HMA26.5 multiplier amplifier (with a discrete A26 power splitter and some semi-rigid cables) and A27/A28 –...
Page 324 Replaceable Parts Replaceable Parts Listings Reference Description Part Number Designator N5240-60058 Front panel LED board  Was N5240-60051 1250-4261 50 ohm termination (connect to HMA26.5 top connector).  (Indicated, but not shown.) (Indicated, but not shown.) a. Part numbers in italic typeface are for rebuilt exchange assemblies. Refer to “Rebuilt-Exchange Assemblies”...
Page 325 Replaceable Parts Replaceable Parts Listings Figure 6-30 Bottom Assemblies, 2-Port, Options 217, S/N Prefixes ≥6021 Keysight N5244B/45B Service Guide 6-91...
Page 326 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 2-Port, Options 217, S/N Prefixes ≥6021 Reference Part Number Description Type Designator N5245-20050 A29 port 1 reference coupler to W11 N5245-20049 A32 port 2 reference coupler to W17 N5245-20045 Front panel port 1 CPLR THRU to A33 port 1 coupler N5245-20118 A29 port 1 reference coupler to A37 reference mixer switch N5245-20025...
Page 327 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5245-20056 A46 port 1 receiver attenuator to A27 mixer brick (A) W103 N5245-20055 Port 2 RCVR B IN to A49 port 2 receiver attenuator W104 N5245-20057 A49 port 2 receiver attenuator to A27 mixer brick (B) W147 N5242-60025 A27 mixer brick (R1) to A24 IF multiplexer (P601)
Page 328 Replaceable Parts Replaceable Parts Listings Figure 6-31 Bottom RF Cables, 2-Port, Options 217, S/N Prefixes ≥6021 6-94 Keysight N5244B/45B Service Guide...
Page 329 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, 2-Port, Options 217, S/N Prefixes ≥6021 Reference Part Number Description Type Designator N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301  N5245-60026 A23 test set motherboard J205 to A46 port 1 receiver attenuator ...
Page 330 Replaceable Parts Replaceable Parts Listings Figure 6-32 Bottom Ribbon Cables and Wire Harnesses, 2-Port, Options 217, S/N Prefixes <6021 6-96 Keysight N5244B/45B Service Guide...
Page 331 Replaceable Parts Replaceable Parts Listings 2-Port Configuration, Options 219, S/N Prefixes ≥6021 The following may apply to your B model PNA: In August 2020, the N5224/44B and N5225/45B analyzers underwent multiple hardware changes. Some instruments that have A25 – 5087-7765 HMA26.5 multiplier amplifier (with a discrete A26 power splitter and some semi-rigid cables) and A27/A28 –...
Page 332 Replaceable Parts Replaceable Parts Listings Reference Description Part Number Designator 33325-60023 Port 1 receiver attenuator Port 2 receiver attenuator Was 33325-60017 Was 33325-60011 N5240-60058 Front panel LED board  Was N5240-60051 1250-4261 50 ohm termination (connect to HMA26.5 top connector). ...
Page 333 Replaceable Parts Replaceable Parts Listings Figure 6-33 Bottom Assemblies, 2-Port, Options 219, S/N Prefixes ≥6021 Keysight N5244B/45B Service Guide 6-99...
Page 334 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 2-Port, Option 219, S/N Prefixes ≥6021 Reference Part Number Description Type Designator N5245-20050 A29 port 1 reference coupler to W11 N5245-20049 A32 port 2 reference coupler to W17 N5245-20118 A29 port 1 reference coupler to A37 reference mixer switch N5245-20025 A33 port 1 coupler to front-panel REF 1 CPLR ARM N5245-20010...
Page 335 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5245-20054 Front-panel Port 1 RCVR A IN to A46 port 1 receiver attenuator N5245-20056 A46 port 1 receiver attenuator to A27 mixer brick (A) W103 N5245-20055 Port 2 RCVR B IN to A49 port 2 receiver attenuator W104 N5245-20057 A49 port 2 receiver attenuator to A27 mixer brick (B)
Page 336 Replaceable Parts Replaceable Parts Listings Figure 6-34 Bottom RF Cables, 2-Port, Option 219, S/N Prefixes ≥6021 6-102 Keysight N5244B/45B Service Guide...
Page 337 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 219, S/N Prefixes ≥6021 Reference Part Number Description Type Designator N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301  N5245-60026 A23 test set motherboard J205 to A46 port 1 receiver attenuator ...
Page 338 Replaceable Parts Replaceable Parts Listings Figure 6-35 Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 219, S/N Prefixes ≥6021 6-104 Keysight N5244B/45B Service Guide...
Page 339 Replaceable Parts Replaceable Parts Listings 2-Port Configuration, Option 222 with and without Option 029 , S/N Prefixes ≥6021 The following may apply to your B model PNA: In August 2020, the N5224/44B and N5225/45B analyzers underwent multiple hardware changes. Some instruments that have A25 – 5087-7765 HMA26.5 multiplier amplifier (with a discrete A26 power splitter and some semi-rigid cables) and A27/A28 –...
Page 340 Replaceable Parts Replaceable Parts Listings Reference Description Part Number Designator 33325-60023 Port 1 receiver attenuator Port 2 receiver attenuator Was 33325-60017 Was 33325-60011 N1811-60033 Port 1 mechanical switch SRC2 OUT1 mechanical switch Was N1811-60031 Port 2 mechanical switch Was N1811-60009 11667-60021 Combiner Was N5532-60002...
Page 341 Replaceable Parts Replaceable Parts Listings Figure 6-36 Bottom Assemblies, 2-Port, Option 222 with and without 029, S/N Prefixes ≥6021 A56, A57, A59, and A64 only with Option 029. 1. The A26 splitter (5067-4086) and N5245-20013, N5245-20022, N5245-20023, N5245-20101, and N5245-20150 cables are only used with a legacy HMA26.5 p/n: 5087-7765. If you are unclear which HMA26.5 assembly your PNA has installed, refer to Chapter 7 Repairs and Figure 7-20 on page 45 and for...
Page 342 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 2-Port, Option 222 with and without 029, S/N Prefixes ≥6021 Reference Part Number Description Type Designator N5245-20045 Port 1 CPLR THRU to A33 port 1 coupler (Option 222 withOUT Option 029) N5245-20118 A29 port 1 reference coupler to A37 reference mixer switch N5245-20025 A33 port 1 coupler to front-panel Port 1 CPLR ARM...
Page 343 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator W105 N5245-20064 A50 port 1 mechanical switch to W11 W106 N5245-20065 A50 port 1 mechanical switch to A29 port 1 reference coupler W107 N5245-20068 A50 port 1 mechanical switch to PORT 1 SW SRC OUT (J11) W108 N5245-20094 Rear-panel PORT 1 COMB THRU IN (J10) to A54 combiner...
Page 344 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator W168 N5245-20146 A59 noise receiver (downconverter) to A57 port 2 noise bypass switch (Option 029 only) W169 N5245-20147 A59 noise receiver (downconverter) to A57 port 2 noise bypass switch (Option 029 only) W171-173, Refer to “Top Cables, All Cables—All Options, S/N Prefixes ≥6021”...
Page 345 Replaceable Parts Replaceable Parts Listings Figure 6-37 Bottom RF Cables, 2-Port, Options 222, S/N Prefixes ≥6021 Keysight N5244B/45B Service Guide 6-111...
Page 346 Replaceable Parts Replaceable Parts Listings Figure 6-38 Bottom RF Cables, 2-Port, Option 222 with Option 029, S/N Prefixes ≥6021 1. The A26 splitter (5067-4086) and N5245-20013, N5245-20022, N5245-20023, N5245-20101, and N5245-20150 cables are only used with a legacy HMA26.5 p/n: 5087-7765. If you are unclear which HMA26.5 assembly your PNA has installed, refer to Chapter 7 Repairs and Figure 7-20 on page 45 and for...
Page 347 Replaceable Parts Replaceable Parts Listings This page intentionally left blank. Keysight N5244B/45B Service Guide 6-113...
Page 348 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 222 with and without 029, S/N Prefixes ≥6021 Reference Part Number Description Type Designator N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301  N5245-60021 A64 tuner J9 to A23 test set motherboard J7 ...
Page 349 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5245-60018 A59 noise receiver (downconverter) J1 port 1 to A23 test set motherboard J550 (Option 029 only) N5230-60014 A23 test set motherboard J209 to A25 HMA26.5 J1 Was N5242-60011 100R N5242-60004 A18 system motherboard J1 to A23 test set motherboard J1 to...
Page 350 Replaceable Parts Replaceable Parts Listings Figure 6-39 Bottom Ribbon Cables and Wire Harnesses, 2-Pt, Option 222 with and without Option 029, S/N Prefixes ≥6021 Cables 10, 13, 14, and 16 apply only with Option 029. 1. The A26 splitter (5067-4086) and N5245-20013, N5245-20022, N5245-20023, N5245-20101, and N5245-20150 cables are only used with a legacy HMA26.5 p/n: 5087-7765.
Page 351 Replaceable Parts Replaceable Parts Listings 2-Port Configuration, Option 224 with and without Option 029, S/N Prefixes ≥6021 The following may apply to your B model PNA: In August 2020, the N5224/44B and N5225/45B analyzers underwent multiple hardware changes. Some instruments that have A25 – 5087-7765 HMA26.5 multiplier amplifier (with a discrete A26 power splitter and some semi-rigid cables) and A27/A28 –...
Page 352 Replaceable Parts Replaceable Parts Listings Reference Description Part Number Designator 5087-7789 Test port 1 bias tee (includes wire harness) Test port 2 bias tee (includes wire harness) Was 5087-7331 33325-60023 Port 1 receiver attenuator Port 2 receiver attenuator Was 33325-60017 Was 33325-60011 N1811-60033 Port 1 mechanical switch...
Page 353 Replaceable Parts Replaceable Parts Listings Figure 6-40 Bottom Assemblies, 2-Port, Option 224 with and without Option 029, S/N Prefixes ≥6021 A56, A57, A59, and A64 only with Option 029. 1. The A26 splitter (5067-4086) and N5245-20013, N5245-20022, N5245-20023, N5245-20101, and N5245-20150 cables are only used with a legacy HMA26.5 p/n: 5087-7765.
Page 354 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 2-Port, Option 224 with and without 029, S/N Prefixes ≥6021 Reference Part Number Description Type Designator N5245-20118 A29 port 1 reference coupler to A37 reference mixer switch N5245-20025 A33 port 1 coupler to front-panel Port 1 CPLR ARM S N5245-20010 A32 port 2 reference coupler to front-panel REF 2 SOURCE OUT N5245-20024...
Page 355 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5245-20056 A46 port 1 receiver attenuator to A27 mixer brick (A) W103 N5245-20055 Port 2 RCVR B IN to A49 port 2 receiver attenuator W104 N5245-20057 A49 port 2 receiver attenuator to A27 mixer brick (B) W105 N5245-20064 A50 port 1 mechanical switch to W11...
Page 356 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator W168 N5245-20146 A59 noise receiver (downconverter) to A57 port 2 noise bypass switch W169 N5245-20147 A59 noise receiver (downconverter) to A57 port 2 noise bypass switch W171-173, Refer to “Top Cables, All Cables—All Options, S/N Prefixes ≥6021”...
Page 357 Replaceable Parts Replaceable Parts Listings Figure 6-41 Bottom RF Cables, 2-Port, Option 224, S/N Prefixes ≥6021 Keysight N5244B/45B Service Guide 6-123...
Page 358 Replaceable Parts Replaceable Parts Listings Figure 6-42 Bottom RF Cables, 2-Port, Option 224 with Option 029, S/N Prefixes ≥6021 1. The A26 splitter (5067-4086) and N5245-20013, N5245-20022, N5245-20023, N5245-20101, and N5245-20150 cables are only used with a legacy HMA26.5 p/n: 5087-7765. If you are unclear which HMA26.5 assembly your PNA has installed, refer to Chapter 7 Repairs and Figure 7-20 on page 45 and for...
Page 359 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 224 with and without 029, S/N Prefixes ≥6021 Reference Part Number Description Type Designator N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301  N5245-60021 A64 tuner J9 to A23 test set motherboard J7 ...
Page 360 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5245-60026 A23 test set motherboard J208 to A49 port 2 receiver attenuator Was 8121-0982, N5242-60007 N5245-60018 A59 noise receiver (downconverter) J1 port 1 to A23 test set motherboard J550. (Option 029 only) N5230-60014 A23 test set motherboard J209 to A25 HMA26.5 J1 Was N5242-60011...
Page 361 Replaceable Parts Replaceable Parts Listings Figure 6-43 Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 224 with and without 029, S/N Prefixes ≥6021 Cables 10, 14, 15, and 18 are only with Option 029. 1. The A26 splitter (5067-4086) and N5245-20013, N5245-20022, N5245-20023, N5245-20101, and N5245-20150 cables are only used with a legacy HMA26.5 p/n: 5087-7765.
Page 362 Replaceable Parts Replaceable Parts Listings This page intentionally left blank 6-128 Keysight N5244B/45B Service Guide...
Page 363: 4-Port Configuration, Serial Number Prefix <6021
Replaceable Parts Replaceable Parts Listings 4-Port Configuration, Serial Number Prefix <6021 This section contains the following: — “4-Port Configuration, Option 401, S/N Prefixes <6021” on page 6-129 — “4-Port Configuration, Option 417, S/N Prefixes <6021” on page 6-137 — “4-Port Configuration, Option 419, S/N Prefixes <6021” on page 6-149 —...
Page 364 Replaceable Parts Replaceable Parts Listings Bottom Assemblies, Standard 4-Port Configuration, Option 401, S/N Prefixes <6021 Reference Description Part Number Designator N5245-60157 Test set motherboard Was N5245-60003‘ N5240-60062 IF multiplexer board Was N5245-60127 5087-7765 LO Multiplier/amplifier 26.5 (HMA26.5) Was: 5087-7711 5067-4086 Splitter 5067-6086 Was 5086-7408...
Page 365 Replaceable Parts Replaceable Parts Listings Figure 6-44 Bottom Assemblies, Standard 4-Port Configuration, Option 401, S/N Prefixes <6021 Keysight N5244B/45B Service Guide 6-131...
Page 366 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, Standard 4-Port Configuration, Option 401, S/N Prefixes <6021 Reference Part Number Description Type Designator N5245-20109 A29 port 1 reference coupler to W11 N5245-20043 A30 port 3 reference coupler to W13 N5245-20044 A31 port 4 reference coupler to W15 N5245-20111 A32 port 2 reference coupler to W17 N5245-20039...
Page 367 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5245-20006 A37 reference mixer switch to front-panel REF 1 SOURCE OUT N5245-20007 REF 1 RCVR R1 IN to A37 reference mixer switch N5245-20009 A37 reference mixer switch to A27 mixer brick (R1) N5245-20020 REF 3 RCVR R3 IN to A28 mixer brick (R3) N5245-20191...
Page 368 Replaceable Parts Replaceable Parts Listings Figure 6-45 Bottom RF Cables, Standard 4-Port Configuration, Option 401, S/N Prefixes <6021 6-134 Keysight N5244B/45B Service Guide...
Page 369 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, Standard 4-Port Configuration, Option 401, S/N Prefixes <6021 Reference Part Number Description Type Designator N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301  N5247-60015 A23 test set motherboard J552 to A28 mixer brick (2) J52 ...
Page 370 Replaceable Parts Replaceable Parts Listings Figure 6-46 Bottom Ribbon Cables and Wire Harnesses, Standard 4-Port Configuration, Option 401, S/N Prefixes <6021 6-136 Keysight N5244B/45B Service Guide...
Page 371 Replaceable Parts Replaceable Parts Listings 4-Port Configuration, Option 417, S/N Prefixes <6021 The following may apply to your B model PNA: In August 2020, the N5224/44B and N5225/45B analyzers underwent multiple hardware changes. Some instruments that have A25 – 5087-7765 HMA26.5 multiplier amplifier (with a discrete A26 power splitter and some semi-rigid cables) and A27/A28 –...
Page 372 Replaceable Parts Replaceable Parts Listings Reference Description Part Number Designator N5240-60058 Front panel LED board  Was N5240-60051 33325-60022 Test port 1 source attenuator Test port 3 source attenuator Was 33325-60016 Test port 4 source attenuator Was 33325-60012 Test port 2 source attenuator 33325-60023 Port 1 receiver attenuator Port 3 receiver attenuator...
Page 373 Replaceable Parts Replaceable Parts Listings Figure 6-47 Bottom Assemblies, 4-Port, Options 417, S/N Prefixes <6021 Keysight N5244B/45B Service Guide 6-139...
Page 374 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 4-Port, Options 417 (Ports 1 and 2), S/N Prefixes <6021 Reference Part Number Description Type Designator N5245-20050 A29 port 1 reference coupler to W11 N5245-20049 A32 port 2 reference coupler to W17 N5245-20099 Front panel port 1 CPLR THRU to A33 port 1 coupler N5245-20008...
Page 375 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5245-20077 A38 port 1 source attenuator to front-panel Port 1 SOURCE OUT N5245-20029 A32 port 2 reference coupler to A41 port 2 source attenuator N5245-20031 A41 port 2 source attenuator to front-panel Port 2 SOURCE OUT N5245-20054 Front-panel Port 1 RCVR A IN to A46 port 1 receiver attenuator N5245-20056...
Page 376 Replaceable Parts Replaceable Parts Listings Figure 6-48 Bottom RF Cables, 4-Port, Options 417 (Ports 1 and 2), S/N Prefixes <6021 6-142 Keysight N5244B/45B Service Guide...
Page 377 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 4-Port, Options 417 (Ports 3 and 4), S/N Prefixes <6021 Reference Part Number Description Type Designator N5245-20043 A30 port 3 reference coupler to W13 N5245-20044 A31 port 4 reference coupler to W15 N5245-20098 Front panel port 3 CPLR THRU to A34 port 3 coupler N5245-20116...
Page 378 Replaceable Parts Replaceable Parts Listings c. The A26 splitter (5067-4086) and N5245-20013, N5245-20022, N5245-20023, N5245-20101, and N5245-20150 cables are only used with a legacy HMA26.5 p/n: 5087-7765. If you are unclear which HMA26.5 assembly your PNA has installed, refer to Chapter 7 Repairs and Figure 7-20 on page 45 and for details on A26 splitter and cabling , refer to your option-model in Chapter 6...
Page 379 Replaceable Parts Replaceable Parts Listings Figure 6-49 Bottom RF Cables, 4-Port, Options 417 (Ports 3 and 4), S/N Prefixes <6021 Keysight N5244B/45B Service Guide 6-145...
Page 380 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, 4-Port, Options 417, S/N Prefixes <6021 Reference Part Number Description Type Designator N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301  N5245-60026 A23 test set motherboard J205 to A46 port 1 receiver attenuator ...
Page 381 Replaceable Parts Replaceable Parts Listings a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness b. If you are replacing an old LED board wire harnesses with a current version (N5225-60001), both wire harnesses must be replaced.
Page 382 Replaceable Parts Replaceable Parts Listings Figure 6-50 Bottom Ribbon Cables & Wire Harnesses, 4-Port, Options 417, S/N Prefixes <6021 6-148 Keysight N5244B/45B Service Guide...
Page 383 Replaceable Parts Replaceable Parts Listings 4-Port Configuration, Option 419, S/N Prefixes <6021 The following may apply to your B model PNA: In August 2020, the N5224/44B and N5225/45B analyzers underwent multiple hardware changes. Some instruments that have A25 – 5087-7765 HMA26.5 multiplier amplifier (with a discrete A26 power splitter and some semi-rigid cables) and A27/A28 –...
Page 384 Replaceable Parts Replaceable Parts Listings Reference Description Part Number Designator N5240-60058 Front panel LED board  Was N5240-60051 33325-60022 Test port 1 source attenuator Test port 3 source attenuator Was 33325-60016 Test port 4 source attenuator Was 33325-60012 Test port 2 source attenuator 5087-7789 Test port 1 bias tee (includes wire harness) Test port 3 bias tee (includes wire harness)
Page 385 Replaceable Parts Replaceable Parts Listings Bottom Assemblies, 4-Port, Option 419 , S/N Prefixes <6021 Figure 6-51 Keysight N5244B/45B Service Guide 6-151...
Page 386 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 4-Port, Option 419 (Ports 1 and 2), S/N Prefixes <6021 Reference Part Number Description Type Designator N5245-20050 A29 port 1 reference coupler to W11 N5245-20049 A32 port 2 reference coupler to W17 N5245-20008 A29 port 1 reference coupler to A37 reference mixer switch N5245-20014...
Page 387 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5245-20085 A33 port 1 coupler to A42 port 1 bias tee N5245-20029 A32 port 2 reference coupler to A41 port 2 source attenuator N5245-20031 A41 port 2 source attenuator to front-panel Port 2 SOURCE OUT N5245-20030 Port 2 CPLR THRU to A45 port 2 bias tee N5245-20047...
Page 388 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 4-Port, Option 419 (Ports 1 and 2) , S/N Prefixes <6021 Figure 6-52 6-154 Keysight N5244B/45B Service Guide...
Page 389 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 4-Port, Option 419 (Ports 3 and 4), S/N Prefixes <6021 Reference Part Number Description Type Designator N5245-20043 A30 port 3 reference coupler to W13 N5245-20044 A31 port 4 reference coupler to W15 N5245-20116 A30 port 3 reference coupler to front-panel REF 3 SOURCE OUT N5245-20015...
Page 390 Replaceable Parts Replaceable Parts Listings b. Some PNA models have newer model A27/A28 mixer blocks installed. A68/A69 3 dB attenuators are only applicable to instruments with legacy 5087-7323/5087-6323 mixer bricks. The new 5087-7417 mixer brick have the 3 dB pads integrated into the mixer brick assembly.
Page 391 Replaceable Parts Replaceable Parts Listings Figure 6-53 Bottom RF Cables, 4-Port, Option 419 (Ports 3 and 4), S/N Prefixes <6021 Keysight N5244B/45B Service Guide 6-157...
Page 392 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 419, S/N Prefixes <6021 Reference Part Number Description Type Designator N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301  N5245-60026 A23 test set motherboard J205 to A46 port 1 receiver attenuator ...
Page 393 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5230-60014 A23 test set motherboard J209 to A25 HMA26.5 J1 Was N5242-60011 100R N5242-60004 A18 system motherboard J1 to A23 test set motherboard J1 to A24 IF multiplexer board J1 E4410-60160 A18 system motherboard J13 to A23 test set motherboard J545 8121-0834...
Page 394 Replaceable Parts Replaceable Parts Listings Figure 6-54 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 419, S/N Prefixes <6021 6-160 Keysight N5244B/45B Service Guide...
Page 395 Replaceable Parts Replaceable Parts Listings 4-Port Configuration, Option 422 with or without Option 029, S/N Prefixes <6021 The following may apply to your B model PNA: In August 2020, the N5224/44B and N5225/45B analyzers underwent multiple hardware changes. Some instruments that have A25 – 5087-7765 HMA26.5 multiplier amplifier (with a discrete A26 power splitter and some semi-rigid cables) and A27/A28 –...
Page 396 Replaceable Parts Replaceable Parts Listings Reference Description Part Number Designator 5087-7759 Reference mixer switch Was 5087-7271 N5240-60058 Front panel LED board  Was N5240-60051 33325-60022 Test port 1 source attenuator Test port 3 source attenuator Was 33325-60016 Test port 4 source attenuator Was 33325-60012 Test port 2 source attenuator 33325-60023...
Page 397 Replaceable Parts Replaceable Parts Listings Figure 6-55 Bottom Assemblies, 4-Port, Option 422 with and without Option 029, S/N Prefixes <6021 A56, A57, A59, and A64 apply only with Option 029. Keysight N5244B/45B Service Guide 6-163...
Page 398 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 4-Port, Option 422 with and without Option 029 (Ports 1 and 2), S/N Prefixes <6021 Reference Part Number Description Type Designator N5245-20008 A29 port 1 reference coupler to A37 reference mixer switch N5245-20014 A33 port 1 coupler to front-panel Port 1 CPLR ARM N5245-20097...
Page 399 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5245-20054 Front-panel Port 1 RCVR A IN to A46 port 1 receiver attenuator N5245-20056 A46 port 1 receiver attenuator to A27 mixer brick (A) W103 N5245-20055 Port 2 RCVR B IN to A49 port 2 receiver attenuator W104 N5245-20057 A49 port 2 receiver attenuator to A27 mixer brick (B)
Page 400 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator W174 N5245-20143 A28 mixer brick to A59 noise receiver (downconverter) (Option 029 only) Refer to “Top Cables, All Cables—All Options, S/N Prefixes <6021” on page 6-24. a. SR = semirigid coaxial cable; F = flexible coaxial cable b.
Page 401 Replaceable Parts Replaceable Parts Listings Figure 6-56 Bottom RF Cables, 4-Port, Option 422 (Ports 1 and 2), S/N Prefixes <6021 Keysight N5244B/45B Service Guide 6-167...
Page 402 Replaceable Parts Replaceable Parts Listings Figure 6-57 Bottom RF Cables, 4-Port, Option 422 with Option 029 (Ports 1 and 2), S/N Prefixes <6021 6-168 Keysight N5244B/45B Service Guide...
Page 403 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 4-Port, Option 422 with and without Option 029 (Ports 3 and 4), S/N Prefixes <6021 Reference Part Number Description Type Designator N5245-20098 Front panel port 3 CPLR THRU to A34 port 3 coupler N5245-20116 A30 port 3 ref coupler to front-panel REF 3 SOURCE OUT N5245-20015...
Page 404 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator W116 N5245-20061 A52 port 4 mechanical switch to A31 port 4 reference coupler W117 N5245-20092 A52 port 4 mechanical switch to PORT 4 SW SRC OUT (J4) W118 N5245-20091 A52 port 4 mechanical switch to PORT 4 SW TSET (J3) W123 N5245-20155...
Page 405 Replaceable Parts Replaceable Parts Listings Figure 6-58 Bottom RF Cables, 4-Port, Option 422 (Ports 3 and 4), S/N Prefixes <6021 Keysight N5244B/45B Service Guide 6-171...
Page 406 Replaceable Parts Replaceable Parts Listings Figure 6-59 Bottom RF Cables, 4-Port, Option 422 with and without Option 029 (Ports 3 and 4), S/N Prefixes <6021 6-172 Keysight N5244B/45B Service Guide...
Page 407 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 422 with and without Option 029, S/N Prefixes <6021 Reference Part Number Description Type Designator N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301  N5245-60021 A64 tuner J9 to A23 test set motherboard J7 ...
Page 408 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5245-60006 A23 test set motherboard J546 to A41 port 2 source attenuator P/O A52 port 4 mechanical switch (to A23 test set motherboard J103). N5247-60015 A23 test set motherboard J552 to A28 mixer brick (2) J52 Was N5245-60008 N5230-60014 A23 test set motherboard J209 to A25 HMA26.5 J1...
Page 409 Replaceable Parts Replaceable Parts Listings Figure 6-60 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 422 with and without Option 029, S/N Prefixes <6021 Cables 11, 15, and 19 are only with Option 029. Keysight N5244B/45B Service Guide 6-175...
Page 410 Replaceable Parts Replaceable Parts Listings 4-Port Configuration, Option 423 with and without 029, S/N Prefixes <6021 The following may apply to your B model PNA: In August 2020, the N5224/44B and N5225/45B analyzers underwent multiple hardware changes. Some instruments that have A25 – 5087-7765 HMA26.5 multiplier amplifier (with a discrete A26 power splitter and some semi-rigid cables) and A27/A28 –...
Page 411 Replaceable Parts Replaceable Parts Listings Reference Description Part Number Designator 5087-7759 Reference mixer switch Was 5087-7271 N5240-60058 Front panel LED board  Was N5240-60051 33325-60022 Test port 1 source attenuator Test port 3 source attenuator Was 33325-60016 Test port 4 source attenuator Was 33325-60012 Test port 2 source attenuator 5087-7789...
Page 412 Replaceable Parts Replaceable Parts Listings Figure 6-61 Bottom Assemblies, 4-Port, Option 423 with and without 029, S/N Prefixes <6021 A56, A57, A59, and A64 apply only with Option 029. 6-178 Keysight N5244B/45B Service Guide...
Page 413 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 4-Port, Option 423 with and without 029 (Ports 1 and 2), S/N Prefixes <6021 Reference Part Number Description Type Designator N5245-20008 A29 port 1 reference coupler to A37 reference mixer switch N5245-20014 A33 port 1 coupler to front-panel Port 1 CPLR ARM N5245-20010 A32 port 2 ref coupler to front-panel REF 2 SOURCE OUT...
Page 414 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5245-20087 A45 port 2 bias tee to A36 port 2 coupler N5245-20054 Front-panel Port 1 RCVR A IN to A46 port 1 receiver attenuator N5245-20056 A46 port 1 receiver attenuator to A27 mixer brick (A) W103 N5245-20055 Port 2 RCVR B IN to A49 port 2 receiver attenuator...
Page 415 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator W171-173, Refer to “Top Cables, All Cables—All Options, S/N Prefixes <6021” on page 6-24. a. SR = semirigid coaxial cable; F = flexible coaxial cable b. The A26 splitter (5067-4086) and N5245-20013, N5245-20022, N5245-20023, N5245-20101, and N5245-20150 cables are only used with a legacy HMA26.5 p/n: 5087-7765.
Page 416 Replaceable Parts Replaceable Parts Listings Figure 6-62 Bottom RF Cables, 4-Port, Option 423 (Ports 1 and 2), S/N Prefixes <6021 6-182 Keysight N5244B/45B Service Guide...
Page 417 Replaceable Parts Replaceable Parts Listings Figure 6-63 Bottom RF Cables, 4-Port, Option 423 with and without 029 (Ports 1 and 2), S/N Prefixes <6021 Keysight N5244B/45B Service Guide 6-183...
Page 418 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 4-Port, Option 423 with and without 029 (Ports 3 and 4), S/N Prefixes <6021 Reference Part Number Description Type Designator N5245-20116 A30 port 3 ref coupler to front-panel REF 3 SOURCE OUT N5245-20015 A34 port 3 coupler to front-panel Port 3 CPLR ARM N5245-20117...
Page 419 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator W114 N5245-20070 Rear-panel PORT 3 SW TSET IN (J7) to A51 port 3 mechanical switch W115 N5245-20060 A52 port 4 mechanical switch to W15 W116 N5245-20061 A52 port 4 mechanical switch to A31 port 4 reference coupler W117 N5245-20092 A52 port 4 mechanical switch to PORT 4 SW SRC OUT (J4)
Page 420 Replaceable Parts Replaceable Parts Listings Figure 6-64 Bottom RF Cables, 4-Port, Option 423 (Ports 3 and 4), S/N Prefixes <6021 6-186 Keysight N5244B/45B Service Guide...
Page 421 Replaceable Parts Replaceable Parts Listings Figure 6-65 Bottom RF Cables, 4-Port, Option 423 with and without 029 (Ports 3 and 4), S/N Prefixes <6021 Keysight N5244B/45B Service Guide 6-187...
Page 422 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 423 with and without 029, S/N Prefixes <6021 Reference Part Number Description Type Designator N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301  N5245-60021 A64 tuner J9 to A23 test set motherboard J7 ...
Page 423 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5245-60026 A23 test set motherboard J207 to A48 port 4 receiver attenuator Was 8121-0982, or N5242-60007 N5242-60007 A23 test set motherboard J208 to A49 port 2 receiver attenuator N5245-60018 A59 noise receiver (downconverter) J1 port 1 to A23 test set motherboard J550.
Page 424 Replaceable Parts Replaceable Parts Listings Figure 6-66 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 423 with and without 029, S/N Prefixes <6021 Cables 11, 19, and ith O ti 6-190 Keysight N5244B/45B Service Guide...
Page 425 Replaceable Parts Replaceable Parts Listings This page intentionally left blank. Keysight N5244B/45B Service Guide 6-191...
Page 426 Replaceable Parts Replaceable Parts Listings 4-Port Configuration, Option 425 with and without 029, S/N Prefixes <6021 The following may apply to your B model PNA: In August 2020, the N5224/44B and N5225/45B analyzers underwent multiple hardware changes. Some instruments that have A25 – 5087-7765 HMA26.5 multiplier amplifier (with a discrete A26 power splitter and some semi-rigid cables) and A27/A28 –...
Page 427 Replaceable Parts Replaceable Parts Listings Reference Description Part Number Designator 5087-7793 Test port 1 coupler Test port 3 coupler Was 5087-7724 Test port 4 coupler Test port 2 coupler 5087-7759 Reference mixer switch Was 5087-7271 N5240-60058 Front panel LED board ...
Page 428 Replaceable Parts Replaceable Parts Listings a. Part numbers in italic typeface are for rebuilt exchange assemblies. Refer to “Rebuilt-Exchange Assemblies” on page 6-5. b. All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2.
Page 429 Replaceable Parts Replaceable Parts Listings Figure 6-67 Bottom Assemblies, 4-Port, Option 425 with and without 029, S/N Prefixes <6021 A56, A57, A59, and A64 apply only with Option 029. Keysight N5244B/45B Service Guide 6-195...
Page 430 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 4-Port, Option 425 with and without 029 (Ports 1 and 2), S/N Prefixes <6021 Reference Part Number Description Type Designator N5245-20008 A29 port 1 reference coupler to A37 reference mixer switch N5245-20014 A33 port 1 coupler to front-panel Port 1 CPLR ARM N5245-20010 A32 port 2 ref coupler to front-panel REF 2 SOURCE OUT...
Page 431 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5245-20056 A46 port 1 receiver attenuator to A27 mixer brick (A) W103 N5245-20055 Port 2 RCVR B IN to A49 port 2 receiver attenuator W104 N5245-20057 A49 port 2 receiver attenuator to A27 mixer brick (B) W105 N5245-20064 A50 port 1 mechanical switch to W11...
Page 432 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator W182 N5245-20182 Cable, assy-RF, A71 port 1 bias combiner to A33 port 1 test coupler, port 1 N5245-20179 Cable, assy-RF, Port 2 CPLR THRU to A74 bias combiner, port 2 W187 (withOUT Option 029 only) W188...
Page 433 Replaceable Parts Replaceable Parts Listings Figure 6-68 Bottom RF Cables, 4-Port, Option 425 (Ports 1 and 2), S/N Prefixes <6021 Keysight N5244B/45B Service Guide 6-199...
Page 434 Replaceable Parts Replaceable Parts Listings Figure 6-69 Bottom RF Cables, 4-Port, Option 425 with 029 (Ports 1 and 2), S/N Prefixes <6021 6-200 Keysight N5244B/45B Service Guide...
Page 435 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 4-Port, Option 425 with and without 029 (Ports 3 and 4), S/N Prefixes <6021 Reference Part Number Description Type Designator N5245-20116 A30 port 3 ref coupler to front-panel REF 3 SOURCE OUT N5245-20015 A34 port 3 coupler to front-panel Port 3 CPLR ARM N5245-20117...
Page 436 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator W116 N5245-20061 A52 port 4 mechanical switch to A31 port 4 reference coupler W117 N5245-20092 A52 port 4 mechanical switch to PORT 4 SW SRC OUT (J4) W118 N5245-20091 A52 port 4 mechanical switch to PORT 4 SW TSET (J3) W123 N5245-20155...
Page 437 Replaceable Parts Replaceable Parts Listings Figure 6-70 Bottom RF Cables, 4-Port, Option 425 (Ports 3 and 4), S/N Prefixes <6021 Keysight N5244B/45B Service Guide 6-203...
Page 438 Replaceable Parts Replaceable Parts Listings Figure 6-71 Bottom RF Cables, 4-Port, Option 425 with and without 029 (Ports 3 and 4), S/N Prefixes <6021 6-204 Keysight N5244B/45B Service Guide...
Page 439 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 425 with and without 029, S/N Prefixes <6021 Reference Part Number Description Type Designator N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301  N5245-60021 A64 tuner J9 to A23 test set motherboard J7 ...
Page 440 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5245-60026 A23 test set motherboard J207 to A48 port 4 receiver attenuator Was 8121-0982, or N5242-60007 N5242-60007 A23 test set motherboard J208 to A49 port 2 receiver attenuator N5245-60018 A59 noise receiver (downconverter) J1 port 1 to A23 test set motherboard J550 (Option 029 only) N5245-60006...
Page 441 Replaceable Parts Replaceable Parts Listings Figure 6-72 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 425 with and without 029, S/N Prefixes <6021 Cables 11, 19, and 23 apply only with Option 029. Keysight N5244B/45B Service Guide 6-207...
Page 442: 4-Port Configurations, Serial Number Prefix ≥6021
Replaceable Parts Replaceable Parts Listings 4-Port Configurations, Serial Number Prefix ≥6021 This section contains the following: — “4-Port Configuration, Option 401, S/N Prefixes ≥6021” on page 6-208 — “4-Port Configuration, Option 417, S/N Prefixes ≥6021” on page 6-217 — “4-Port Configuration, Option 419, S/N Prefixes ≥6021” on page 6-229 —...
Page 443 Replaceable Parts Replaceable Parts Listings Reference Description Part Number Designator N5240-60101 LO Multiplier/amplifier 26.5 (HMA26.5) Was: 5087-7765 Was 5087-7711 5087-7417 Mixer brick 5087-6417 Was: 5087-7323 5087-6323 5087-7760 Test port 1 reference coupler Test port 3 reference coupler Was 5086-7658 Test port 4 reference coupler Test port 2 reference coupler 5087-7793 Test port 1 coupler...
Page 444 Replaceable Parts Replaceable Parts Listings Figure 6-73 Bottom Assemblies, Standard 4-Port Configuration, Option 401, S/N Prefixes ≥6021 6-210 Keysight N5244B/45B Service Guide...
Page 445 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, Standard 4-Port Configuration, Option 401, S/N Prefixes ≥6021 Reference Part Number Description Type Designator N5245-20109 A29 port 1 reference coupler to W11 N5245-20043 A30 port 3 reference coupler to W13 N5245-20044 A31 port 4 reference coupler to W15 N5245-20111 A32 port 2 reference coupler to W17 N5245-20039...
Page 446 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5245-20006 A37 reference mixer switch to front-panel REF 1 SOURCE OUT N5245-20007 REF 1 RCVR R1 IN to A37 reference mixer switch N5245-20009 A37 reference mixer switch to A27 mixer brick (R1) N5245-20020 REF 3 RCVR R3 IN to A28 mixer brick (R3) N5245-20191...
Page 447 Replaceable Parts Replaceable Parts Listings c. On instruments with a new HMA26.5 the N5245-20048 cable is used in all 2-port and 4-port instruments. And, on instruments with legacy HMA26.5, N5245-20150 is used on all 2-port instruments with Option 029. But, on 4-port instruments with a new HMA26.5 N5245-20196 is used with Option 029.
Page 448 Replaceable Parts Replaceable Parts Listings Figure 6-74 Bottom RF Cables, Standard 4-Port Configuration, Option 401, S/N Prefixes ≥6021 6-214 Keysight N5244B/45B Service Guide...
Page 449 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, Standard 4-Port Configuration, Option 401, S/N Prefixes ≥6021 Reference Part Number Description Type Designator N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301  N5247-60015 A23 test set motherboard J552 to A28 mixer brick (2) J52 ...
Page 450 Replaceable Parts Replaceable Parts Listings Figure 6-75 Bottom Ribbon Cables and Wire Harnesses, Standard 4-Port Configuration, Option 401, S/N Prefixes ≥6021 6-216 Keysight N5244B/45B Service Guide...
Page 451 Replaceable Parts Replaceable Parts Listings 4-Port Configuration, Option 417, S/N Prefixes ≥6021 The following may apply to your B model PNA: In August 2020, the N5224/44B and N5225/45B analyzers underwent multiple hardware changes. Some instruments that have A25 – 5087-7765 HMA26.5 multiplier amplifier (with a discrete A26 power splitter and some semi-rigid cables) and A27/A28 –...
Page 452 Replaceable Parts Replaceable Parts Listings Reference Description Part Number Designator 33325-60022 Test port 1 source attenuator Test port 3 source attenuator Was 33325-60016 Test port 4 source attenuator Was 33325-60012 Test port 2 source attenuator 33325-60023 Port 1 receiver attenuator Port 3 receiver attenuator Was 33325-60017 Port 4 receiver attenuator...
Page 453 Replaceable Parts Replaceable Parts Listings Figure 6-76 Bottom Assemblies, 4-Port, Options 417, S/N Prefixes ≥6021 – Bias Tees, Internal Combiner, and Mechanical Switches shown below require Option 423 – Ignore these for Option 417 Keysight N5244B/45B Service Guide 6-219...
Page 454 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 4-Port, Options 417 (Ports 1 and 2), S/N Prefixes ≥6021 Reference Part Number Description Type Designator N5245-20050 A29 port 1 reference coupler to W11 N5245-20049 A32 port 2 reference coupler to W17 N5245-20099 Front panel port 1 CPLR THRU to A33 port 1 coupler N5245-20008...
Page 455 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5245-20031 A41 port 2 source attenuator to front-panel Port 2 SOURCE OUT N5245-20054 Front-panel Port 1 RCVR A IN to A46 port 1 receiver attenuator N5245-20056 A46 port 1 receiver attenuator to A27 mixer brick (A) W103 N5245-20055 Port 2 RCVR B IN to A49 port 2 receiver attenuator...
Page 456 Replaceable Parts Replaceable Parts Listings Figure 6-77 Bottom RF Cables, 4-Port, Options 417 (Ports 1 and 2), S/N Prefixes ≥6021 – Bias Tees, Internal Combiner, and Mechanical Switches shown below require Option 423 – Ignore these for Option 417 6-222 Keysight N5244B/45B Service Guide...
Page 457 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 4-Port, Options 417 (Ports 3 and 4), S/N Prefixes ≥6021 Reference Part Number Description Type Designator N5245-20043 A30 port 3 reference coupler to W13 N5245-20044 A31 port 4 reference coupler to W15 N5245-20098 Front panel port 3 CPLR THRU to A34 port 3 coupler N5245-20116...
Page 458 Replaceable Parts Replaceable Parts Listings c. On instruments with a new HMA26.5 the N5245-20048 cable is used in all 2-port and 4-port instruments. And, on instruments with legacy HMA26.5, N5245-20150 is used on all 2-port instruments with Option 029. But, on 4-port instruments with a new HMA26.5 N5245-20196 is used with Option 029.
Page 459 Replaceable Parts Replaceable Parts Listings Figure 6-78 Bottom RF Cables, 4-Port, Options 417 (Ports 3 and 4), S/N Prefixes ≥6021 – Bias Tees, Internal Combiner, and Mechanical Switches shown below require Option 423 – Ignore these for Option 417 Keysight N5244B/45B Service Guide 6-225...
Page 460 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, 4-Port, Options 417, S/N Prefixes ≥6021 Reference Part Number Description Type Designator N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301  N5245-60026 A23 test set motherboard J205 to A46 port 1 receiver attenuator ...
Page 461 Replaceable Parts Replaceable Parts Listings a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness b. If you are replacing an old LED board wire harnesses with a current version (N5225-60001), both wire harnesses must be replaced.
Page 462 Replaceable Parts Replaceable Parts Listings Figure 6-79 Bottom Ribbon Cables & Wire Harnesses, 4-Port, Options 417, S/N Prefixes ≥6021 – Bias Tees, Internal Combiner, and Mechanical Switches shown below require Option 423 – Ignore these for Option 417 6-228 Keysight N5244B/45B Service Guide...
Page 463 Replaceable Parts Replaceable Parts Listings 4-Port Configuration, Option 419, S/N Prefixes ≥6021 The following may apply to your B model PNA: In August 2020, the N5224/44B and N5225/45B analyzers underwent multiple hardware changes. Some instruments that have A25 – 5087-7765 HMA26.5 multiplier amplifier (with a discrete A26 power splitter and some semi-rigid cables) and A27/A28 –...
Page 464 Replaceable Parts Replaceable Parts Listings Reference Description Part Number Designator 33325-60022 Test port 1 source attenuator Test port 3 source attenuator Was 33325-60016 Test port 4 source attenuator Was 33325-60012 Test port 2 source attenuator 5087-7789 Test port 1 bias tee (includes wire harness) Test port 3 bias tee (includes wire harness) Was 5087-7331 Test port 4 bias tee (includes wire harness)
Page 465 Replaceable Parts Replaceable Parts Listings Figure 6-80 Bottom Assemblies, 4-Port, Option 419, S/N Prefixes ≥6021 – Internal Combiner and Mechanical Switches shown below require Option 423 – Ignore these for Option 419 Keysight N5244B/45B Service Guide 6-231...
Page 466 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 4-Port, Option 419 (Ports 1 and 2), S/N Prefixes ≥6021 Reference Part Number Description Type Designator N5245-20050 A29 port 1 reference coupler to W11 N5245-20049 A32 port 2 reference coupler to W17 N5245-20008 A29 port 1 reference coupler to A37 reference mixer switch N5245-20014...
Page 467 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5245-20029 A32 port 2 reference coupler to A41 port 2 source attenuator N5245-20031 A41 port 2 source attenuator to front-panel Port 2 SOURCE OUT N5245-20030 Port 2 CPLR THRU to A45 port 2 bias tee N5245-20047 A45 port 2 bias tee to A36 port 2 coupler N5245-20054...
Page 468 Replaceable Parts Replaceable Parts Listings Figure 6-81 Bottom RF Cables, 4-Port, Option 419 (Ports 1 and 2), S/N Prefixes ≥6021 – Internal Combiner and Mechanical Switches shown below require Option 423 – Ignore these for Option 419 6-234 Keysight N5244B/45B Service Guide...
Page 469 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 4-Port, Option 419 (Ports 3 and 4), S/N Prefixes ≥6021 Reference Part Number Description Type Designator N5245-20043 A30 port 3 reference coupler to W13 N5245-20044 A31 port 4 reference coupler to W15 N5245-20116 A30 port 3 reference coupler to front-panel REF 3 SOURCE OUT N5245-20015...
Page 470 Replaceable Parts Replaceable Parts Listings b. Some PNA models have newer model A27/A28 mixer blocks installed. A68/A69 3 dB attenuators are only applicable to instruments with legacy 5087-7323/5087-6323 mixer bricks. The new 5087-7417 mixer brick have the 3 dB pads integrated into the mixer brick assembly.
Page 471 Replaceable Parts Replaceable Parts Listings Figure 6-82 Bottom RF Cables, 4-Port, Option 419 (Ports 3 and 4), S/N Prefixes ≥6021 – Internal Combiner and Mechanical Switches shown below require Option 423 – Ignore these for Option 419 Keysight N5244B/45B Service Guide 6-237...
Page 472 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 419, S/N Prefixes ≥6021 Reference Part Number Description Type Designator N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301  N5245-60026 A23 test set motherboard J205 to A46 port 1 receiver attenuator ...
Page 473 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5230-60014 A23 test set motherboard J209 to A25 HMA26.5 J1 Was N5242-60011 100R N5242-60004 A18 system motherboard J1 to A23 test set motherboard J1 to A24 IF multiplexer board J1 E4410-60160 A18 system motherboard J13 to A23 test set motherboard J545 8121-0834...
Page 474 Replaceable Parts Replaceable Parts Listings Figure 6-83 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 419, S/N Prefixes ≥6021 – Internal Combiner and Mechanical Switches shown below require Option 423 – Ignore these for Option 419 6-240 Keysight N5244B/45B Service Guide...
Page 475 Replaceable Parts Replaceable Parts Listings 4-Port Configuration, Option 422 with or without Option 029, S/N Prefixes ≥6021 The following may apply to your B model PNA: In August 2020, the N5224/44B and N5225/45B analyzers underwent multiple hardware changes. Some instruments that have A25 – 5087-7765 HMA26.5 multiplier amplifier (with a discrete A26 power splitter and some semi-rigid cables) and A27/A28 –...
Page 476 Replaceable Parts Replaceable Parts Listings Reference Description Part Number Designator N5240-60058 Front panel LED board  Was N5240-60051 33325-60022 Test port 1 source attenuator Test port 3 source attenuator Was 33325-60016 Test port 4 source attenuator Was 33325-60012 Test port 2 source attenuator 33325-60023 Port 1 receiver attenuator Port 3 receiver attenuator...
Page 477 Replaceable Parts Replaceable Parts Listings Figure 6-84 Bottom Assemblies, 4-Port, Option 422 with and without Option 029, S/N Prefixes ≥6021 – Internal Combiner and Mechanical Switches shown below require Option 423 – Ignore these for Option 422 A56, A57, A59, and A64 apply only with Option 029.
Page 478 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 4-Port, Option 422 with and without Option 029 (Ports 1 and 2), S/N Prefixes ≥6021 Reference Part Number Description Type Designator N5245-20008 A29 port 1 reference coupler to A37 reference mixer switch N5245-20014 A33 port 1 coupler to front-panel Port 1 CPLR ARM N5245-20097...
Page 479 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5245-20056 A46 port 1 receiver attenuator to A27 mixer brick (A) W103 N5245-20055 Port 2 RCVR B IN to A49 port 2 receiver attenuator W104 N5245-20057 A49 port 2 receiver attenuator to A27 mixer brick (B) W105 N5245-20064 A50 port 1 mechanical switch to W11...
Page 480 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator W174 N5245-20143 A28 mixer brick to A59 noise receiver (downconverter) – (Option 029 only) W175, W200 Refer to “Top Cables, All Cables—All Options, S/N Prefixes ≥6021” on page 6-31. &...
Page 481 Replaceable Parts Replaceable Parts Listings Figure 6-85 Bottom RF Cables, 4-Port, Option 422 without Option 029 (Ports 1 and 2), S/N Prefixes ≥6021 – Internal Combiner and Mechanical Switches shown below require Option 423 – Ignore these for Option 422; Noise Tuner and Switches require Option 029 Keysight N5244B/45B Service Guide 6-247...
Page 482 Replaceable Parts Replaceable Parts Listings Figure 6-86 Bottom RF Cables, 4-Port, Option 422 with Option 029 (Ports 1 and 2), S/N Prefixes ≥6021 – Internal Combiner and Mechanical Switches shown below require Option 423 – Ignore these for Option 422 6-248 Keysight N5244B/45B Service Guide...
Page 483 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 4-Port, Option 422 with and without Option 029 (Ports 3 and 4), S/N Prefixes ≥6021 Reference Part Number Description Type Designator N5245-20098 Front panel port 3 CPLR THRU to A34 port 3 coupler N5245-20116 A30 port 3 ref coupler to front-panel REF 3 SOURCE OUT N5245-20015...
Page 484 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator W117 N5245-20092 A52 port 4 mechanical switch to PORT 4 SW SRC OUT (J4) W118 N5245-20091 A52 port 4 mechanical switch to PORT 4 SW TSET (J3) W123 N5245-20155 Rear panel jumper Was N5245-20104 N5245-20195...
Page 485 Replaceable Parts Replaceable Parts Listings Figure 6-87 Bottom RF Cables, 4-Port, Option 422 without Option 029 (Ports 3 and 4), S/N Prefixes ≥6021 – Internal Combiner and Mechanical Switches shown below require Option 423 – Ignore these for Option 422; Noise Tuner and Switches require Option 029 Keysight N5244B/45B Service Guide 6-251...
Page 486 Replaceable Parts Replaceable Parts Listings Figure 6-88 Bottom RF Cables, 4-Port, Option 422 with Option 029 (Ports 3 and 4), S/N Prefixes ≥6021 – Internal Combiner and Mechanical Switches shown below require Option 423 – Ignore these for Option 422; Noise Tuner and Switches require Option 029 6-252 Keysight N5244B/45B Service Guide...
Page 487 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 422 with and without Option 029, S/N Prefixes ≥6021 Reference Part Number Description Type Designator N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301  N5245-60021 A64 tuner J9 to A23 test set motherboard J7 ...
Page 488 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5245-60006 A23 test set motherboard J546 to A41 port 2 source attenuator P/O A52 port 4 mechanical switch (to A23 test set motherboard J103). N5247-60015 A23 test set motherboard J552 to A28 mixer brick (2) J52 Was N5245-60008 N5230-60014 A23 test set motherboard J209 to A25 HMA26.5 J1...
Page 489 Replaceable Parts Replaceable Parts Listings Figure 6-89 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 422 with and without Option 029, S/N Prefixes ≥6021 – Internal Combiner and Mechanical Switches shown below require Option 423 – Ignore these for Option 422; Noise Tuner and Switches require Option 029 Cables 11, 15, and 19 are only with Option 029.
Page 490 Replaceable Parts Replaceable Parts Listings 4-Port Configuration, Option 423 with and without 029, S/N Prefixes ≥6021 The following may apply to your B model PNA: In August 2020, the N5224/44B and N5225/45B analyzers underwent multiple hardware changes. Some instruments that have A25 – 5087-7765 HMA26.5 multiplier amplifier (with a discrete A26 power splitter and some semi-rigid cables) and A27/A28 –...
Page 491 Replaceable Parts Replaceable Parts Listings Reference Description Part Number Designator N5240-60058 Front panel LED board  Was N5240-60051 33325-60022 Test port 1 source attenuator Test port 3 source attenuator Was 33325-60016 Test port 4 source attenuator Was 33325-60012 Test port 2 source attenuator 5087-7789 Test port 1 bias tee (includes wire harness) Test port 3 bias tee (includes wire harness)
Page 492 Replaceable Parts Replaceable Parts Listings Figure 6-90 Bottom Assemblies, 4-Port, Option 423 with and without 029, S/N Prefixes ≥6021 6-258 Keysight N5244B/45B Service Guide...
Page 493 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 4-Port, Option 423 with and without 029 (Ports 1 and 2), S/N Prefixes ≥6021 Reference Part Number Description Type Designator N5245-20008 A29 port 1 reference coupler to A37 reference mixer switch N5245-20014 A33 port 1 coupler to front-panel Port 1 CPLR ARM N5245-20010 A32 port 2 ref coupler to front-panel REF 2 SOURCE OUT...
Page 494 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5245-20054 Front-panel Port 1 RCVR A IN to A46 port 1 receiver attenuator N5245-20056 A46 port 1 receiver attenuator to A27 mixer brick (A) W103 N5245-20055 Port 2 RCVR B IN to A49 port 2 receiver attenuator W104 N5245-20057 A49 port 2 receiver attenuator to A27 mixer brick (B)
Page 495 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator W171-173, Refer to “Top Cables, All Cables—All Options, S/N Prefixes ≥6021” on page 6-31. 175 & W201 a. SR = semirigid coaxial cable; F = flexible coaxial cable b. On instruments with a new HMA26.5 the N5245-20048 cable is used in all 2-port and 4-port instruments. And, on instruments with legacy HMA26.5, N5245-20150 is used on all 2-port instruments with Option 029.
Page 496 Replaceable Parts Replaceable Parts Listings Figure 6-91 Bottom RF Cables, 4-Port, Option 423 (Ports 1 and 2), S/N Prefixes ≥6021 6-262 Keysight N5244B/45B Service Guide...
Page 497 Replaceable Parts Replaceable Parts Listings Figure 6-92 Bottom RF Cables, 4-Port, Option 423 with 029 (Ports 1 and 2), S/N Prefixes ≥6021 Keysight N5244B/45B Service Guide 6-263...
Page 498 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 4-Port, Option 423 with and without 029 (Ports 3 and 4), S/N Prefixes ≥6021 Reference Part Number Description Type Designator N5245-20116 A30 port 3 ref coupler to front-panel REF 3 SOURCE OUT N5245-20015 A34 port 3 coupler to front-panel Port 3 CPLR ARM N5245-20117...
Page 499 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator W115 N5245-20060 A52 port 4 mechanical switch to W15 W116 N5245-20061 A52 port 4 mechanical switch to A31 port 4 reference coupler W117 N5245-20092 A52 port 4 mechanical switch to PORT 4 SW SRC OUT (J4) W118 N5245-20091 A52 port 4 mechanical switch to PORT 4 SW TSET (J3)
Page 500 Replaceable Parts Replaceable Parts Listings Figure 6-93 Bottom RF Cables, 4-Port, Option 423 (Ports 3 and 4), S/N Prefixes ≥6021 6-266 Keysight N5244B/45B Service Guide...
Page 501 Replaceable Parts Replaceable Parts Listings Figure 6-94 Bottom RF Cables, 4-Port, Option 423 with Option 029 (Ports 3 and 4), S/N Prefixes ≥6021 Keysight N5244B/45B Service Guide 6-267...
Page 502 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 423 with and without 029, S/N Prefixes ≥6021 Reference Part Number Description Type Designator N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301  N5245-60021 A64 tuner J9 to A23 test set motherboard J7 ...
Page 503 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5245-60026 A23 test set motherboard J207 to A48 port 4 receiver attenuator Was 8121-0982, or N5242-60007 N5242-60007 A23 test set motherboard J208 to A49 port 2 receiver attenuator N5245-60018 A59 noise receiver (downconverter) J1 port 1 to A23 test set motherboard J550.
Page 504 Replaceable Parts Replaceable Parts Listings Figure 6-95 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 423 with and without 029, S/N Prefixes ≥6021 Cables 11, 19, and 23 are only with Option 029. 6-270 Keysight N5244B/45B Service Guide...
Page 505 Replaceable Parts Replaceable Parts Listings This page intentionally left blank. Keysight N5244B/45B Service Guide 6-271...
Page 506 Replaceable Parts Replaceable Parts Listings 4-Port Configuration, Option 425 with and without 029, S/N Prefixes ≥6021 The following may apply to your B model PNA: In August 2020, the N5224/44B and N5225/45B analyzers underwent multiple hardware changes. Some instruments that have A25 – 5087-7765 HMA26.5 multiplier amplifier (with a discrete A26 power splitter and some semi-rigid cables) and A27/A28 –...
Page 507 Replaceable Parts Replaceable Parts Listings Reference Description Part Number Designator 5087-7759 Reference mixer switch Was 5087-7271 33325-60022 Test port 1 source attenuator Test port 3 source attenuator Was 33325-60016 Test port 4 source attenuator Was 33325-60012 Test port 2 source attenuator 5087-7789 Test port 1 bias tee (includes wire harness) Test port 3 bias tee (includes wire harness)
Page 508 Replaceable Parts Replaceable Parts Listings c. The A26 splitter (5067-4086) and N5245-20013, N5245-20022, N5245-20023, N5245-20101, and N5245-20150 cables are only used with a legacy HMA26.5 p/n: 5087-7765. If you are unclear which HMA26.5 assembly your PNA has installed, refer to Chapter 7 Repairs and Figure 7-20 on page 45 and for details on A26 splitter and cabling , refer to your option-model in Chapter 6...
Page 509 Replaceable Parts Replaceable Parts Listings Figure 6-96 Bottom Assemblies, 4-Port, Option 425 with and without 029, S/N Prefixes ≥6021 A56, A57, A59, and A64 apply only with Option 029. Keysight N5244B/45B Service Guide 6-275...
Page 510 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 4-Port, Option 425 with and without 029 (Ports 1 and 2), S/N Prefixes ≥6021 Reference Part Number Description Type Designator N5245-20008 A29 port 1 reference coupler to A37 reference mixer switch N5245-20014 A33 port 1 coupler to front-panel Port 1 CPLR ARM N5245-20010 A32 port 2 ref coupler to front-panel REF 2 SOURCE OUT...
Page 511 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator W103 N5245-20055 Port 2 RCVR B IN to A49 port 2 receiver attenuator W104 N5245-20057 A49 port 2 receiver attenuator to A27 mixer brick (B) W105 N5245-20064 A50 port 1 mechanical switch to W11 W106 N5245-20065 A50 port 1 mechanical switch to A29 port 1 reference coupler...
Page 512 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5245-20179 Cable, assy-RF, Port 2 CPLR THRU to A74 bias combiner, port 2 W187 (withOUT Option 029 only) W188 N5245-20183 Cable, assy-RF, A74 port 2 bias combiner to A36 port 2 test coupler, port 2 W189 N5245-20189...
Page 513 Replaceable Parts Replaceable Parts Listings Figure 6-97 Bottom RF Cables, 4-Port, Option 425 (Ports 1 and 2), S/N Prefixes ≥6021 – Noise Tuner & Noise Switches Require Option 029; Ignore for Standard Option Keysight N5244B/45B Service Guide 6-279...
Page 514 Replaceable Parts Replaceable Parts Listings Figure 6-98 Bottom RF Cables, 4-Port, Option 425 with 029 (Ports 1 and 2), S/N Prefixes ≥6021 6-280 Keysight N5244B/45B Service Guide...
Page 515 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 4-Port, Option 425 with and without 029 (Ports 3 and 4), S/N Prefixes ≥6021 Reference Part Number Description Type Designator N5245-20116 A30 port 3 ref coupler to front-panel REF 3 SOURCE OUT N5245-20015 A34 port 3 coupler to front-panel Port 3 CPLR ARM N5245-20117...
Page 516 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator W117 N5245-20092 A52 port 4 mechanical switch to PORT 4 SW SRC OUT (J4) W118 N5245-20091 A52 port 4 mechanical switch to PORT 4 SW TSET (J3) W123 N5245-20155 Rear panel jumper Was N5245-20104 N5245-20180...
Page 517 Replaceable Parts Replaceable Parts Listings Figure 6-99 Bottom RF Cables, 4-Port, Option 425 (Ports 3 and 4), S/N Prefixes ≥6021 – Noise Tuner & Noise Switches Require Option 029; Ignore for Standard Option Keysight N5244B/45B Service Guide 6-283...
Page 518 Replaceable Parts Replaceable Parts Listings Figure 6-100 Bottom RF Cables, 4-Port, Option 425 with and without 029 (Ports 3 and 4), S/N Prefixes ≥6021 6-284 Keysight N5244B/45B Service Guide...
Page 519 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 425 with and without 029, S/N Prefixes ≥6021 Reference Part Number Description Type Designator N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301  N5245-60021 A64 tuner J9 to A23 test set motherboard J7 ...
Page 520 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5245-60026 A23 test set motherboard J207 to A48 port 4 receiver attenuator Was 8121-0982, or N5242-60007 N5242-60007 A23 test set motherboard J208 to A49 port 2 receiver attenuator N5245-60018 A59 noise receiver (downconverter) J1 port 1 to A23 test set motherboard J550 (Option 029 only) N5245-60006...
Page 521 Replaceable Parts Replaceable Parts Listings Figure 6-101 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 425 with and without 029, S/N Prefixes ≥6021 Cables 11, 19, and 23 apply only with Option 029. Keysight N5244B/45B Service Guide 6-287...
Page 522 Replaceable Parts Replaceable Parts Listings This page intentionally left blank. 6-288 Keysight N5244B/45B Service Guide...
Page 523: Rear Panel Assembly, All Options
Replaceable Parts Replaceable Parts Listings Rear Panel Assembly, All Options Item Part Description Number Number N5240-00012 Power supply rear panel bracket  0515-0372 Machine screw, M3.0 x 8, pan head (To attach: cpu assy to ejector arms and  left and right side inner brackets, RP to chassis, power supply bracket to the power supply and rear panel, handler I/O cable to rear panel, test set deck to rear panel.) Solid state drive (SSD).
Page 524 Replaceable Parts Replaceable Parts Listings Item Part Description Number Number Bottom foot (Refer to “External Hardware and Miscellaneous Parts, All Options” on page 6-301.) Rear panel jumper (Refer to “Bottom RF Cables, 4-Port, Option 423 with and without 029 (Ports 1 and 2), S/N Prefixes <6021” on page 6-179 “Bottom RF Cables, 4-Port, Option 423 with and without 029 (Ports 1 and 2), S/N Prefixes ≥6021”...
Page 525: Fan Assemblies, All Options
Replaceable Parts Replaceable Parts Listings Fan Assemblies, All Options Reference Part Number Description Designator 3160-4199 3160-0281 Fan guard  Was 3160-4198 0361-1272 Fan rivet  N5245-00006 Fan bracket (for 2 fans)  N5245-00003 Fan bracket (for 3 fans)  0515-0372 Machine screw, M3.0 x 8, pan head (To attach: 2-fan assy to chassis, 3-fan assy ...
Page 526 Replaceable Parts Replaceable Parts Listings Figure 6-103 Fan Assemblies, Side View, All Options 6-292 Keysight N5244B/45B Service Guide...
Page 527 Replaceable Parts Replaceable Parts Listings Top Hardware and Miscellaneous Parts, All Options Reference Part Number Description Designator W1312-00062 Power supply bracket  0515-0375 Machine screw, M3.0 x 16, pan head (To attach midplane board to midplane  bracket.) 0515-1227 Machine screw, M3.0 x 6, flat head (To attach power supply bracket to power ...
Page 528 Replaceable Parts Replaceable Parts Listings Figure 6-104 Top Hardware and Miscellaneous Parts, Top View, All Options 6-294 Keysight N5244B/45B Service Guide...
Page 529 Replaceable Parts Replaceable Parts Listings Bottom Hardware and Miscellaneous Parts Ref- Serial Part Number Description erenc Number Prefixes Desig- Affected nator All prefixes 0515-1227 Machine screw, M3.0 x 6, flat head (To attach test set front sub panel)  All prefixes 0515-2994 Machine screw, M3.0 x 0.5, pan head (8 to attach A42–A45 bias tees to ...
Page 530 Replaceable Parts Replaceable Parts Listings Ref- Serial Part Number Description erenc Number Prefixes Desig- Affected nator All prefixes 0515-0661 Machine screw, M2 x 14, pan head (To attach A54 combiner bracket to test set deck.) 5201 and N5224-00002 Test set deck above 5150 and N5245-00002...
Page 531 Replaceable Parts Replaceable Parts Listings Ref- Serial Part Number Description erenc Number Prefixes Desig- Affected nator All prefixes 5022-1087 Test port coupler dress nut (One for each coupler.) All prefixes 0515-1521 Machine screw, M3.0 x 5, flat head (To attach front panel LED boards.) All prefixes N5245-00011 Bracket (For all bias tees.)
Page 532 Replaceable Parts Replaceable Parts Listings Figure 6-105 Bottom Hardware and Miscellaneous Parts 6-298 Keysight N5244B/45B Service Guide...
Page 533 Replaceable Parts Replaceable Parts Listings This page intentionally left blank. Internal Hardware and Miscellaneous Parts, All Options Ref- Serial Part Number Description erence Number Prefixes Desig- Affected nator 5201 and above N5247-00016 Left side inner bracket  5150 and below N5245-00005 All prefixes W1312-00048...
Page 534 Replaceable Parts Replaceable Parts Listings Figure 6-106 Internal Hardware and Miscellaneous Parts, All Options 6-300 Keysight N5244B/45B Service Guide...
Page 535 Replaceable Parts Replaceable Parts Listings External Hardware and Miscellaneous Parts, All Options Ref- Serial Part Number Description erence Number Prefixes Desig- Affected nator All prefixes N5245-00035 Outer cover  All prefixes 5041-7903 Rear foot  All prefixes 0515-1619 Machine screw M4.0 x 25, pan head (To attach rear foot.) ...
Page 536 Replaceable Parts Replaceable Parts Listings Figure 6-107 External Hardware and Miscellaneous Parts, All Options 6-302 Keysight N5244B/45B Service Guide...
Page 537 Replaceable Parts Replaceable Parts Listings Miscellaneous Part Numbers Table 6-3 Part Numbers for Miscellaneous Parts and Accessories Description Model or Part Number Service Tools 1/4 inch and 5/16 inch open-end wrench, thin profile 8710-0510 5/16 inch (8 mm), open-end wrench 8710-2174 1/2 inch to 9/16 inch (8 mm), open-end wrench 8710-1770...
Page 538 Replaceable Parts Replaceable Parts Listings Table 6-3 Part Numbers for Miscellaneous Parts and Accessories (Continued) Description Model or Part Number Battery Battery, lithium manganese dioxide, 3V, 0.22A-hr. (located on A21 CPU board assembly) 1420-0356 Analyzer Accessories Pulse I/O Adapter (For connecting between the analyzer’s rear-panel PULSE I/O connector and N1966A the coaxial inputs and outputs of external pulse generators and external pulse modulators.) USB Accessories...
Page 539 Replaceable Parts Replaceable Parts Listings The options described in Chapter 2, “General Product Information.” can be ordered as upgrades. Refer to “Analyzer Options, Accessories, and Upgrades Available” on page 2-3 for information on upgrades that are available for the N5244BA and N5245B analyzers. Refer to the section, “Analyzer Options, Accessories, and Upgrades Available”...
Page 540 Replaceable Parts Replaceable Parts Listings 6-306 Keysight N5244B/45B Service Guide...
Page 541 Keysight Microwave Network Analyzers 2-Port and 4-Port PNA-X Service Guide Repair and Replacement Procedures Before replacing the A23 board, if possible: Run EEBackup.exe using the directory for your Windows operating system: Windows 7 OS: C:/Program Files (x86)/Agilent/Network Analyzer/Service/EEBackup.exe. Click on Save EEPROM Backup, and then click on Backup TSMB Memory. Windows 10 OS (32-bit): C:/Program Files (x86)/Keysight/Network Analyzer/Service/EEBackup.exe.
Page 542 Repair and Replacement Procedures Information in This Chapter Information in This Chapter This chapter contains procedures for removing and replacing the major assemblies of your Keysight Technologies PNA series microwave network analyzer. Chapter Seven at-a-Glance Section Title Summary of Content...
Page 543 Repair and Replacement Procedures Personal Safety Warnings Personal Safety Warnings These servicing instructions are for use by qualified personnel only. To avoid electrical shock, do not perform any servicing unless you are qualified to do so. The opening of covers or removal of parts is likely to expose dangerous voltages.
Page 544 Repair and Replacement Procedures Electrostatic Discharge (ESD) Protection Electrostatic Discharge (ESD) Protection Many of the assemblies in this instrument are very susceptible to damage from electrostatic discharge (ESD). Perform the following procedures only at a static-safe workstation and wear a grounded wrist strap. Many of the assemblies in this instrument are very susceptible to damage from electrostatic discharge (ESD).
Page 545 Repair and Replacement Procedures Removal and Replacement Procedures Removal and Replacement Procedures Table 7-1 List of Procedures Reference Assembly Description Location Designator Covers, outer and inner page 7-8 Fan bracket and fans page 7-89 Front panel assembly page 7-10 Front panel LED boards page 7-87 Front panel display board page 7-12...
Page 546 Repair and Replacement Procedures Removal and Replacement Procedures Table 7-1 List of Procedures (Continued) Reference Assembly Description Location Designator Port 1 source step attenuator (Optional) page 7-57 Port 3 source step attenuator (Optional) Port 4 source step attenuator (Optional) Port 2 source step attenuator (Optional) Port 1 bias tee (Optional) page 7-59 Port 3 bias tee (Optional)
Page 547 Repair and Replacement Procedures Removal and Replacement Procedures a. The A26 splitter (5067-4086) and N5245-20013, N5245-20022, N5245-20023, N5245-20101, and N5245-20150 cables are only used with a legacy HMA26.5 p/n: 5087-7765. If you are unclear which HMA26.5 assembly your PNA has installed, refer to Chapter 7 and Figure 7-20 on page 7-45 and for details on A26 splitter and cabling , refer to your option-model...
Page 548 Repair and Replacement Procedures Removing the Covers Removing the Covers Tools Required — T-10 TORX driver (set to 9 in-lb) — T-20 TORX driver (set to 21 in-lb) Removing the Outer Cover This procedure is best performed with the analyzer resting on its front handles in the vertical position.
Page 549 Repair and Replacement Procedures Removing the Covers Figure 7-1 Outer and Inner Cover Removal Keysight N5244B/45B Service Guide...
Page 550 Repair and Replacement Procedures Removing and Replacing the Front Panel Assembly Removing and Replacing the Front Panel Assembly Tools Required — T-10 TORX driver (set to 9 in-lb) — T-20 TORX driver (set to 21 in-lb) — 5/16 inch open-end torque wrench (set to 10 in-lb) —...
Page 551 Repair and Replacement Procedures Removing and Replacing the Front Panel Assembly Figure 7-2 Front Panel Assembly Removal Keysight N5244B/45B Service Guide 7-11...
Page 552 Repair and Replacement Procedures Removing and Replacing the A1–A3 and Other Front Panel Subassemblies Removing and Replacing the A1–A3 and Other Front Panel Subassemblies Tools Required — T-6 TORX driver (set to 3 in-lb) — T-8 TORX driver (set to 8 in-lb) —...
Page 553 Repair and Replacement Procedures Removing and Replacing the A1–A3 and Other Front Panel Subassemblies board (item [11]), touch screen controller board to interface board cable (item [13]), power switch board to interface board cable (item [12]), and the speaker assembly cable. ...
Page 554 Repair and Replacement Procedures Removing and Replacing the A1–A3 and Other Front Panel Subassemblies 5. The power button keypad can now be removed from the power switch board by gently pulling each of the rubber tabs through the PC board. Removing the Speaker Assembly 1.
Page 555 Repair and Replacement Procedures Removing and Replacing the A1–A3 and Other Front Panel Subassemblies 10. With a T-6 TORX (set to 3-in-lb), remove the 2 screws (item [23]) on the 2nd side bracket (item [21]). During re-assembly of the side brackets to the LCD display, it is very important to avoid over-tightening.
Page 556 Repair and Replacement Procedures Removing and Replacing the A1–A3 and Other Front Panel Subassemblies Figure 7-4 A3 Display Assembly with LCD Display - Cables Figure 7-5 Remove LCD Cable, LCD to LED Inverter Board Cable, & Side Brackets 7-16 Keysight N5244B/45B Service Guide...
Page 557 Repair and Replacement Procedures Removing and Replacing the A1–A3 and Other Front Panel Subassemblies Figure 7-6 Remove LCD Mounting Plate to LCD Display & LCD Display Cable Figure 7-7 Removing the Flat Flex Cable from the LCD to the Controller Board Keysight N5244B/45B Service Guide 7-17...
Page 558 Repair and Replacement Procedures Removing and Replacing the A1–A3 and Other Front Panel Subassemblies Figure 7-8 Power Keypad to Power Button Board Figure 7-9 Remove Speaker Assembly and Mounting Foam 7-18 Keysight N5244B/45B Service Guide...
Page 559 Repair and Replacement Procedures Removing and Replacing the A1–A3 and Other Front Panel Subassemblies Replacement Procedure 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-93.
Page 560 Repair and Replacement Procedures Removing and Replacing the A4–A17 Boards (For analyzers with serial numbers prefixed MY/SG/US5150 and below) Removing and Replacing the A4–A17 Boards (For analyzers with serial numbers prefixed MY/SG/US5150 and below) The following may apply to your B model PNA: In February 2012, the N5244A and N5245A analyzers underwent significant hardware changes.
Page 561 Repair and Replacement Procedures Removing and Replacing the A4–A17 Boards (For analyzers with serial numbers prefixed MY/SG/US5150 and below) 2. Remove the outer and inner covers. Refer to “Removing the Covers” on page 7-8. 3. A5 and A10 source boards: a.
Page 562 Repair and Replacement Procedures Removing and Replacing the A4–A17 Boards (For analyzers with serial numbers prefixed MY/SG/US5150 and below) If any N5230-60002 13.5 GHz Synthesizer board in your PNA is replaced with the RoHS compliant N5240-60076 board, you must replace ALL of the other N5230-60002 boards.
Page 563 Repair and Replacement Procedures Removing and Replacing the A4–A17 Boards (For analyzers with serial numbers prefixed MY/SG/US5150 and below) Figure 7-10 A4, A5, A7, A8, A9, A10, A12, A13, A14, A15, A16, and A17 Boards Removal 1. The A26 splitter (5067-4086) and N5245-20013, N5245-20022, N5245-20023, N5245-20101, and N5245-20150 cables are only used with a legacy HMA26.5 p/n: 5087-7765.
Page 564 Repair and Replacement Procedures Removing and Replacing the A4–A17 Boards (For analyzers with serial numbers prefixed MY/SG/US5201 and above) Removing and Replacing the A4–A17 Boards (For analyzers with serial numbers prefixed MY/SG/US5201 and above) If you have a PNA with a serial number prefix <6021 and have not had a 2S7 or 4S7 upgrade, then you have A4, A14, A15, and A17 boards.
Page 565 Repair and Replacement Procedures Removing and Replacing the A4–A17 Boards (For analyzers with serial numbers prefixed MY/SG/US5201 and above) a. A10 source board only: on the bottom side of the analyzer,  disconnect the cables from the A12 and A13 boards (item b.
Page 566 Repair and Replacement Procedures Removing and Replacing the A4–A17 Boards (For analyzers with serial numbers prefixed MY/SG/US5201 and above) Figure 7-11 A4, A5, A7, A8, A9, A10, A12, A13, A14, A15, A16, and A17 Boards Removal 1. The A26 splitter (5067-4086) and N5245-20013, N5245-20022, N5245-20023, N5245-20101, and N5245-20150 cables are only used with a legacy HMA26.5 p/n: 5087-7765.
Page 567 Repair and Replacement Procedures Removing and Replacing the A18 System Motherboard Removing and Replacing the A18 System Motherboard Tools Required — T-10 TORX driver (set to 9 in-lb) — T-20 TORX driver (set to 21 in-lb) — 5/16 inch open-end torque wrench (set to 10 in-lb) —...
Page 568 Repair and Replacement Procedures Removing and Replacing the A18 System Motherboard 13. Turn the analyzer over so that the bottom side is up and remove the A23 Test Set Motherboard and the A24 IF Mux. Disconnect the two ribbon cables from the A18 System Motherboard. ...
Page 569 Repair and Replacement Procedures Removing and Replacing the A18 System Motherboard Figure 7-12 A18 System Motherboard Removal 1. The A26 splitter (5067-4086) and N5245-20013, N5245-20022, N5245-20023, N5245-20101, and N5245-20150 cables are only used with a legacy HMA26.5 p/n: 5087-7765. If you are unclear which HMA26.5 assembly your PNA has installed, refer to Chapter 7 and Figure 7-20 on page 7-45 and for details...
Page 570 Repair and Replacement Procedures Removing and Replacing the A19 Midplane Board Removing and Replacing the A19 Midplane Board Tools Required — T-10 TORX driver (set to 9 in-lb) — T-20 TORX driver (set to 21 in-lb) — 5/16 inch open-end torque wrench (set to 10 in-lb) —...
Page 571 Repair and Replacement Procedures Removing and Replacing the A19 Midplane Board Figure 7-13 A19 Midplane Board Removal Keysight N5244B/45B Service Guide 7-31...
Page 572 Repair and Replacement Procedures Removing and Replacing the A20 Power Supply Assembly Removing and Replacing the A20 Power Supply Assembly Tools Required — T-10 TORX driver (set to 9 in-lb) — T-20 TORX driver (set to 21 in-lb) — ESD grounding wrist strap Removal Procedure IMPORTANT! If the rear power supply rear cover must be replaced, a new KC label is required (part number N5240-80041).
Page 573 Repair and Replacement Procedures Removing and Replacing the A20 Power Supply Assembly Figure 7-14 A20 Power Supply Assembly Removal Keysight N5244B/45B Service Guide 7-33...
Page 574 Repair and Replacement Procedures Removing and Replacing the A21 CPU Board Assembly Removing and Replacing the A21 CPU Board Assembly Tools Required — T-10 TORX driver (set to 9 in-lb) — T-20 TORX driver (set to 21 in-lb) — ESD grounding wrist strap Removal Procedure Refer to Figure 7-15...
Page 575 Repair and Replacement Procedures Removing and Replacing the A21 CPU Board Assembly Figure 7-15 A21 CPU Board Assembly Removal Keysight N5244B/45B Service Guide 7-35...
Page 576 Repair and Replacement Procedures Removing and Replacing the A22 GPIB Board Removing and Replacing the A22 GPIB Board Tools Required — T-10 TORX driver (set to 9 in-lb) — T-20 TORX driver (set to 21 in-lb) — ESD grounding wrist strap Removal Procedure Refer to Figure 7-16...
Page 577 Repair and Replacement Procedures Removing and Replacing the A22 GPIB Board Figure 7-16 A22 GPIB Board Removal Keysight N5244B/45B Service Guide 7-37...
Page 578 Repair and Replacement Procedures Removing and Replacing the A23 Test Set Motherboard Removing and Replacing the A23 Test Set Motherboard Before replacing the A19 board, if possible: Run EEBackup.exe using the directory for your Windows operating system: Windows 7 OS: C:/Program Files (x86)/Agilent/Network Analyzer/Service/EEBackup.exe.
Page 579 Repair and Replacement Procedures Removing and Replacing the A23 Test Set Motherboard 8. Slide the A23 test set motherboard toward the front of the instrument until the rear panel BNC connectors are free of the rear panel, then lift the motherboard and remove it from the analyzer.
Page 580 Repair and Replacement Procedures Removing and Replacing the A23 Test Set Motherboard Figure 7-17 A23 Test Set Motherboard Removal 1. The A26 splitter (5067-4086) and N5245-20013, N5245-20022, N5245-20023, N5245-20101, and N5245-20150 cables are only used with a legacy HMA26.5 p/n: 5087-7765. If you are unclear which HMA26.5 assembly your PNA has installed, refer to Chapter 7 and Figure 7-20 on page 7-45 and for details...
Page 581 Repair and Replacement Procedures Removing and Replacing the A24 IF Multiplexer Board Removing and Replacing the A24 IF Multiplexer Board Tools Required — T-10 TORX driver (set to 9 in-lb) — T-20 TORX driver (set to 21 in-lb) — 5/16 inch open-end torque wrench (set to 10 in-lb) —...
Page 582 Repair and Replacement Procedures Removing and Replacing the A24 IF Multiplexer Board Figure 7-18 A24 IF Multiplexer Board Removal 1. The A26 splitter (5067-4086) and N5245-20013, N5245-20022, N5245-20023, N5245-20101, and N5245-20150 cables are only used with a legacy HMA26.5 p/n: 5087-7765. If you are unclear which HMA26.5 assembly your PNA has installed, refer to Chapter 7 and Figure 7-20 on page 7-45 and for details...
Page 583 Repair and Replacement Procedures Removing and Replacing the A25 HMA26.5 Removing and Replacing the A25 HMA26.5 Tools Required — T-10 TORX driver (set to 9 in-lb) — T-20 TORX driver (set to 21 in-lb) — 5/16 inch open-end torque wrench (set to 10 in-lb) —...
Page 584 Repair and Replacement Procedures Removing and Replacing the A25 HMA26.5 Figure 7-19 A25 HMA26.5 Removal 1. The A26 splitter (5067-4086) and N5245-20013, N5245-20022, N5245-20023, N5245-20101, and N5245-20150 cables are only used with a legacy HMA26.5 p/n: 5087-7765. If you are unclear which HMA26.5 assembly your PNA has installed, refer to Chapter 7 and Figure 7-20 on page 7-45 and for details...
Page 585 Repair and Replacement Procedures Removing and Replacing the A25 HMA26.5 Verify the Model/Version of HMA26.5 Installed This upgrade kit contains components for use with PNA models using the legacy HMA26.5 part number 5087-7765. If your PNA has the newer HMA26.5 part number N5240-60101 installed you may discard these parts: —...
Page 586 Repair and Replacement Procedures Removing and Replacing the A26 Splitter Removing and Replacing the A26 Splitter Tools Required — T-8 TORX driver (set to 6 in-lb) — T-20 TORX driver (set to 21 in-lb) — 5/16 inch open-end torque wrench (set to 10 in-lb) —...
Page 587 Repair and Replacement Procedures Removing and Replacing the A26 Splitter Figure 7-21 A26 Splitter Removal 1. The A26 splitter (5067-4086) and N5245-20013, N5245-20022, N5245-20023, N5245-20101, and N5245-20150 cables are only used with a legacy HMA26.5 p/n: 5087-7765. If you are unclear which HMA26.5 assembly your PNA has installed, refer to Chapter 7 and Figure 7-20 on page 7-45 and for details...
Page 588 Repair and Replacement Procedures Removing and Replacing the A27 and A28 Mixer Bricks Removing and Replacing the A27 and A28 Mixer Bricks Tools Required — T-8 TORX driver (set to 6 in-lb) — T-10 TORX driver (set to 9 in-lb) —...
Page 589 Repair and Replacement Procedures Removing and Replacing the A27 and A28 Mixer Bricks  a. Remove the two screws (item ) from each shield. b. Remove 3 screws (not shown) that fasten each mixer brick to the mixer brick mounting block. Replacement Procedure 1.
Page 590 Repair and Replacement Procedures Removing and Replacing the A27 and A28 Mixer Bricks Figure 7-22 A27 and A28 Mixer Bricks Removal 1. The A26 splitter (5067-4086) and N5245-20013, N5245-20022, N5245-20023, N5245-20101, and N5245-20150 cables are only used with a legacy HMA26.5 p/n: 5087-7765. If you are unclear which HMA26.5 assembly your PNA has installed, refer to Chapter 7 and Figure 7-20 on page 7-45 and for details...
Page 591 Repair and Replacement Procedures Removing and Replacing the A29–A32 Reference Couplers and Reference Coupler Mounting Brackets Removing and Replacing the A29–A32 Reference Couplers and Reference Coupler Mounting Brackets Tools Required — T-6 TORX driver (set to 4 in-lb) — T-10 TORX driver (set to 9 in-lb) —...
Page 592 Repair and Replacement Procedures Removing and Replacing the A29–A32 Reference Couplers and Reference Coupler Mounting Brackets Figure 7-23 A29 through A32 reference couplers Removal 7-52 Keysight N5244B/45B Service Guide...
Page 593 Repair and Replacement Procedures Removing and Replacing the A33–A36 Test Port Couplers Removing and Replacing the A33–A36 Test Port Couplers Tools Required — T-10 TORX driver (set to 9 in-lb) — T-20 TORX driver (set to 21 in-lb) — 5/16 inch open-end torque wrench (set to 10 in-lb) —...
Page 594 Repair and Replacement Procedures Removing and Replacing the A33–A36 Test Port Couplers 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-93. Figure 7-24 A33 through A36 Test Port Couplers Removal 7-54 Keysight N5244B/45B Service Guide...
Page 595 Repair and Replacement Procedures Removing and Replacing the A37 Reference Mixer Switch Removing and Replacing the A37 Reference Mixer Switch Tools Required — T-10 TORX driver (set to 9 in-lb) — T-20 TORX driver (set to 21 in-lb) — 5/16 inch open-end torque wrench (set to 10 in-lb) —...
Page 596 Repair and Replacement Procedures Removing and Replacing the A37 Reference Mixer Switch Figure 7-25 A37 Reference Mixer Switch Removal 7-56 Keysight N5244B/45B Service Guide...
Page 597 Repair and Replacement Procedures Removing and Replacing the A38–A41 Source Attenuators and the A46–A49 Receiver Attenuators Removing and Replacing the A38–A41 Source Attenuators and the A46–A49 Receiver Attenuators Tools Required — T-10 TORX driver (set to 9 in-lb) — T-20 TORX driver (set to 21 in-lb) —...
Page 598 Repair and Replacement Procedures Removing and Replacing the A38–A41 Source Attenuators and the A46–A49 Receiver Attenuators Figure 7-26 Source and Receiver Attenuators 7-58 Keysight N5244B/45B Service Guide...
Page 599 Repair and Replacement Procedures Removing and Replacing the A42–A45 Bias Tees Removing and Replacing the A42–A45 Bias Tees Tools Required — T-10 TORX driver (set to 9 in-lb) — T-20 TORX driver (set to 21 in-lb) — 5/16-inch open-end torque wrench (set to 10 in-lb) —...
Page 600 Repair and Replacement Procedures Removing and Replacing the A42–A45 Bias Tees Figure 7-27 A42 through A45 Bias Tees Removal 7-60 Keysight N5244B/45B Service Guide...
Page 601 Repair and Replacement Procedures Removing and Replacing the A50–A53 Bypass Switches and the A54 Combiner Removing and Replacing the A50–A53 Bypass Switches and the A54 Combiner IMPORTANT! When an attenuator or a bypass switch is replaced in a PNA-X, it is important to reset the Mechanical Counter setting.
Page 602 Repair and Replacement Procedures Removing and Replacing the A50–A53 Bypass Switches and the A54 Combiner 9. Remove two screws that attach the bypass switch or the A54 combiner to the switch bracket. Replacement Procedure 1. Reverse the order of the removal procedure. Torque all cable connectors to 10 in-lbs.
Page 603 Repair and Replacement Procedures Removing and Replacing the A50–A53 Bypass Switches and the A54 Combiner Figure 7-28 A50 through A53 Bypass Switches and A54 Combiner Removal 1. The A26 splitter (5067-4086) and N5245-20013, N5245-20022, N5245-20023, N5245-20101, and N5245-20150 cables are only used with a legacy HMA26.5 p/n: 5087-7765. If you are unclear which HMA26.5 assembly your PNA has installed, refer to Chapter 7 and Figure 7-20 on page 7-45 and for details...
Page 604 Repair and Replacement Procedures Removing and Replacing the A55 Solid State Drive (SSD) Removing and Replacing the A55 Solid State Drive (SSD) Certain unique files exist on the SSD that are necessary for proper operation of your analyzer. These files must be copied to another location to allow them to be installed onto the new SSD after it has been installed.
Page 605 Repair and Replacement Procedures Removing and Replacing the A55 Solid State Drive (SSD) Figure 7-29 SSD Removal Reinstalling the SSD Reverse the order of the removal procedure. Install Backup Files onto the New SSD The files that were previously saved onto a USB flash memory drive must now be installed onto the new SSD.
Page 606 Repair and Replacement Procedures Removing and Replacing the A56 Port 1 Noise Bypass Switch (Option 029) Removing and Replacing the A56 Port 1 Noise Bypass Switch (Option 029) Tools Required T-6 TORX driver (set to 4 in-lb) — T-10 TORX driver (set to 9 in-lb) —...
Page 607 Repair and Replacement Procedures Removing and Replacing the A56 Port 1 Noise Bypass Switch (Option 029) 10. Move the disconnected semirigid cables out of the way and remove the A64 tuner/A56 bypass switch assembly (with bracket) from the analyzer. It may be necessary to loosen the other end of the cables to allow them to be moved.
Page 608 Repair and Replacement Procedures Removing and Replacing the A56 Port 1 Noise Bypass Switch (Option 029) Figure 7-30 A56 Port 1 Noise Bypass Switch Removal 1. The A26 splitter (5067-4086) and N5245-20013, N5245-20022, N5245-20023, N5245-20101, and N5245-20150 cables are only used with a legacy HMA26.5 p/n: 5087-7765. If you are unclear which HMA26.5 assembly your PNA has installed, refer to Chapter 7 and Figure 7-20 on page 7-45 and for details...
Page 609 Repair and Replacement Procedures Removing and Replacing the A57 Port 2 Noise Bypass Switch and A59 Noise Receiver (Downconverter) – (Option 029) Removing and Replacing the A57 Port 2 Noise Bypass Switch and A59 Noise Receiver (Downconverter) – (Option 029) Tools Required T-6 TORX driver (set to 4 in-lb) —...
Page 610 Repair and Replacement Procedures Removing and Replacing the A57 Port 2 Noise Bypass Switch and A59 Noise Receiver (Downconverter) – (Option 029) 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-93.
Page 611 Repair and Replacement Procedures Removing and Replacing the A64 Tuner (Option 029) Removing and Replacing the A64 Tuner (Option 029) Tools Required T-6 TORX driver (set to 4 in-lb) — T-10 TORX driver (set to 9 in-lb) — T-20 TORX driver (set to 21 in-lb) —...
Page 612 Repair and Replacement Procedures Removing and Replacing the A64 Tuner (Option 029)  11. Remove two screws (item ) that secure the A64 tuner to the A56 bypass switch and bracket. Replacement Procedure 1. Reverse the order of the removal procedure reusing the existing hardware. Torque all cable connectors to 10 in-lbs.
Page 613 Repair and Replacement Procedures Removing and Replacing the A64 Tuner (Option 029) Figure 7-32 A64 Tuner Removal 1. The A26 splitter (5067-4086) and N5245-20013, N5245-20022, N5245-20023, N5245-20101, and N5245-20150 cables are only used with a legacy HMA26.5 p/n: 5087-7765. If you are unclear which HMA26.5 assembly your PNA has installed, refer to Chapter 7 and Figure 7-20 on page 7-45 and for details...
Page 614 Repair and Replacement Procedures Removing and Replacing the A70 or A75 Low Frequency Extension (LFE) Board Removing and Replacing the A70 or A75 Low Frequency Extension (LFE) Board Tools Required – Four port PNAs use the A70 LFE board. – Two port PNAs use the A75 LFE board. The A70 LFE board RF flexible cable’s connector labels on port 3 and port 4 connectors on the A70 LFE board are similar to the A75 LFE board’s port 1 and port 2 connector labels.
Page 615 Repair and Replacement Procedures Removing and Replacing the A70 or A75 Low Frequency Extension (LFE) Board 5. Disconnect the 8121-2919 and N5245-60005 ribbon cables. Refer to Figure 7-33 on page 7-75. Figure 7-33 Disconnect Ribbon Cables from Rear Panel Connectors (8121-2919, N5245-60005) Keysight N5244B/45B Service Guide 7-75...
Page 616 Repair and Replacement Procedures Removing and Replacing the A70 or A75 Low Frequency Extension (LFE) Board Figure 7-34 A70 4-Port LFE Board Remove Cables (8120-5014 (x2), 8120-5017 (x3), N5242-60079, N5242-60027, N5242-60080). 1. The A26 splitter (5067-4086) and N5245-20013, N5245-20022, N5245-20023, N5245-20101, and N5245-20150 cables are only used with a legacy HMA26.5 p/n: 5087-7765.
Page 617 Repair and Replacement Procedures Removing and Replacing the A70 or A75 Low Frequency Extension (LFE) Board 6. Remove port 1 bias combiner “RF IN” cable from the “Port1” connector on the LFE board. Refer to Figure 7-35 on page 7-77. Figure 7-35 Remove A71 bias combiner cable (N5240-60097) from “Port1”...
Page 618 Repair and Replacement Procedures Removing and Replacing the A70 or A75 Low Frequency Extension (LFE) Board 8. Remove A74 port 2 bias combiner “RF IN” cable to “Port2” connector on the LFE board. Figure 7-36 A74 port 2 bias combiner cable (N5240-60097) from “Port2” connector on the A70 LFE board 9.
Page 619 Repair and Replacement Procedures Removing and Replacing the A70 or A75 Low Frequency Extension (LFE) Board  10. Disconnect the ribbon cable (item ) from the A70 LFE board. Refer to Figure 7-37 on page 7-79. Figure 7-37 A70 LFE Board Removal (N5291-60001, 0515-0665 (x2)). (A75 LFE Board (N5291-60005) Removal is Similar.) ...
Page 620 Repair and Replacement Procedures Removing and Replacing the A71–A74 Bias Tee Combiners Removing and Replacing the A71–A74 Bias Tee Combiners Tools Required — T-6 TORX driver - set to 6 in-lbs (0.68 N.m) — T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) —...
Page 621 Repair and Replacement Procedures Removing and Replacing the A71–A74 Bias Tee Combiners Replacement Procedure Ensure that when the bias combiner semirigid cables are torqued that one 5/16 in wrench is used to stabilize the connector on the combiner and the second wrench is used to torque the semirigid cable to 10 in-lbs.
Page 622 Repair and Replacement Procedures Removing and Replacing the A71–A74 Bias Tee Combiners Figure 7-38 A71–A74 Bias Tee Combiners and Cables Removal. (N5222B Option 420 Shown. All Other PNA LFE Options are Similar. Figure 7-39 Remove Bias Combiner Bracket Assemblies from the Chassis (N5245-00036/N5245-00037, 0515-0372, 5087-7403, 0515-1227).
Page 623 Repair and Replacement Procedures Removing and Replacing the A71–A74 Bias Tee Combiners Figure 7-40 Remove DC Bias Cable from Bias Combiner (N5240-60091) Figure 7-41 Remove Bias Combiner, Cables, and Clamps (5023-3299, 5087-7403, 0515-2141, and N5240-60097 (x2)) Keysight N5244B/45B Service Guide 7-83...
Page 624 Repair and Replacement Procedures Removing and Replacing the A71–A74 Bias Tee Combiners Figure 7-42 Mark Bias Combiner With a Permanent Marker 7-84 Keysight N5244B/45B Service Guide...
Page 625 Repair and Replacement Procedures Removing and Replacing the Rear Panel Removing and Replacing the Rear Panel Tools Required — T-10 TORX driver (set to 9 in-lb) — T-20 TORX driver (set to 21 in-lb) — 5/16 inch nutsetter (set to 10 in-lb) —...
Page 626 Repair and Replacement Procedures Removing and Replacing the Rear Panel Figure 7-43 Rear Panel Removal 7-86 Keysight N5244B/45B Service Guide...
Page 627 Repair and Replacement Procedures Removing and Replacing the Front Panel LED Boards Removing and Replacing the Front Panel LED Boards Tools Required — T-10 TORX driver (set to 9 in-lb) — T-20 TORX driver (set to 21 in-lb) — 5/16 inch open-end torque wrench (set to 10 in-lb) —...
Page 628 Repair and Replacement Procedures Removing and Replacing the Front Panel LED Boards Figure 7-44 Front Panel LED Boards Removal 7-88 Keysight N5244B/45B Service Guide...
Page 629 Repair and Replacement Procedures Removing and Replacing the Fans Removing and Replacing the Fans Tools Required — T-10 TORX driver (set to 9 in-lb) — T-20 TORX driver (set to 21 in-lb) — Pozidriv screw driver — 5/16 inch open-end torque wrench (set to 10 in-lb) —...
Page 630 Repair and Replacement Procedures Removing and Replacing the Fans 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-93. Figure 7-45 B1 Fan Removal 7-90 Keysight N5244B/45B Service Guide...
Page 631 Repair and Replacement Procedures Removing and Replacing the Lithium Battery Removing and Replacing the Lithium Battery Tools Required — T-10 TORX driver (set to 9 in-lb) — T-20 TORX driver (set to 21 in-lb) — ESD grounding wrist strap Removal Procedure Refer to Figure 7-46 for this procedure.
Page 632 Repair and Replacement Procedures Removing and Replacing the Lithium Battery Figure 7-46 Lithium Battery Removal 7-92 Keysight N5244B/45B Service Guide...
Page 633 Repair and Replacement Procedures Post-Repair Procedures Post-Repair Procedures After the replacement of an assembly, you must perform the service procedures in the order listed in Table 7-2. Procedures referenced in this table are located in Chapter 3, “Tests and Adjustments,” unless specified otherwise.
Page 634 Repair and Replacement Procedures Post-Repair Procedures Table 7-2 Related Service Procedures (Continued) Adjustments Verification, Performance, Replaced Assembly and Other Procedures and Other Tests and Procedures A4 13.5 GHz source 1 synthesizer EE Default Adjustment: Synth Src1 Frequency Accuracy Test board only Source Power Accuracy Test Synthesizer Bandwidth...
Page 635 Repair and Replacement Procedures Post-Repair Procedures Table 7-2 Related Service Procedures (Continued) Adjustments Verification, Performance, Replaced Assembly and Other Procedures and Other Tests and Procedures “Noise Figure Adjustment Receiver Noise Figure Test A9 noise receiver board (Option (Available with Option 029 with Noise Jitter Test 029) S93029A/B Installed)”...
Page 636 Repair and Replacement Procedures Post-Repair Procedures Table 7-2 Related Service Procedures (Continued) Adjustments Verification, Performance, Replaced Assembly and Other Procedures and Other Tests and Procedures A14 frequency reference board 10 MHz Frequency Reference Frequency Accuracy TestSource AdjustmentEE Default Power Accuracy Test Adjustment: Synth LO only Source Maximum Power Output Synthesizer Bandwidth...
Page 637 Repair and Replacement Procedures Post-Repair Procedures Table 7-2 Related Service Procedures (Continued) Adjustments Verification, Performance, Replaced Assembly and Other Procedures and Other Tests and Procedures A15 Digital to digital synthesizer EE Default Adjustment: Synth LO Frequency Accuracy Test (DDS) assembly ( 6021 serial ≥...
Page 638 Repair and Replacement Procedures Post-Repair Procedures Table 7-2 Related Service Procedures (Continued) Adjustments Verification, Performance, Replaced Assembly and Other Procedures and Other Tests and Procedures A18 system motherboard No adjustment needed Front Panel Keypad and RPG Test A3 Display Test Chapter 4 The Operator’s Check A19 midplane board...
Page 639 Repair and Replacement Procedures Post-Repair Procedures Table 7-2 Related Service Procedures (Continued) Adjustments Verification, Performance, Replaced Assembly and Other Procedures and Other Tests and Procedures IF Gain Adjustment Frequency Accuracy Test A26 splitter (PNA models with Receiver Characterization Source Power Accuracy Test serial number prefixes <6021 only) Receiver Adjustment...
Page 640 Repair and Replacement Procedures Post-Repair Procedures Table 7-2 Related Service Procedures (Continued) Adjustments Verification, Performance, Replaced Assembly and Other Procedures and Other Tests and Procedures A38–A41 source step attenuators Source Adjustment Source Maximum Power Output IF Gain Adjustment Test Receiver Characterization Calibration Coefficients Test Receiver Adjustment Source Power Accuracy Test...
Page 641 Repair and Replacement Procedures Post-Repair Procedures Table 7-2 Related Service Procedures (Continued) Adjustments Verification, Performance, Replaced Assembly and Other Procedures and Other Tests and Procedures A54 combiner Source Adjustment Source Maximum Power Output IF Gain Adjustment Test Receiver Characterization Calibration Coefficients Test Receiver Adjustment Source Power Accuracy Test IF Response Adjustment...
Page 642 Repair and Replacement Procedures Post-Repair Procedures Table 7-2 Related Service Procedures (Continued) Adjustments Verification, Performance, Replaced Assembly and Other Procedures and Other Tests and Procedures A59 noise receiver Noise Figure Adjustment Noise Jitter Test (Available with Option 029 with (downconverter) – (Option 029) Noise Receiver Linearity Test S93029A/B Installed) Noise Receiver Compression Test...
Page 643 Repair and Replacement Procedures Post-Repair Procedures c. The A26 splitter (5067-4086) and N5245-20013, N5245-20022, N5245-20023, N5245-20101, and N5245-20150 cables are only used with a legacy HMA26.5 p/n: 5087-7765. If you are unclear which HMA26.5 assembly your PNA has installed, refer to Chapter 7 and Figure 7-20 on page 7-45 and for details on A26 splitter and cabling , refer to your option-model in Chapter 6...
Page 644 Repair and Replacement Procedures Post-Repair Procedures Resetting the Mechanical Counter This process is to be performed anytime an attenuator or a bypass switch is replaced in an a PNA. Refer to Figure 7-47 on page 7-105. Procedure Requirements — The analyzer must be powered up and operating to perform this procedure. —...
Page 645 Repair and Replacement Procedures Post-Repair Procedures Figure 7-47 Mechanical Cycle Counter window (Port 1 NOISE TUNER SWITCH and Port 2 NOISE RECVR SWITCH are only applicable for Option 029) EEPROM Backup The analyzer uses arrays of correction constants to enable the analyzer to produce accurate, leveled source signals and receive clean test signals.
Page 646 Repair and Replacement Procedures Post-Repair Procedures — Windows 10 -- C:\Program Files\Keysight\Network Analyzer\Service\eebackup.exe — Run the program. — Click Backup EEPROM. — Click Backup TSMB Mem. — Click Backup Synth Mem. (Applies to Version 7 Synthesizers Only) — Click Exit when the program has finished. Figure 8 EEPROM Backup Menu 7-106...
Page 647 Keysight Microwave Network Analyzers 2-Port and 4-Port PNA-X Service Guide General Purpose Maintenance Procedures Information in This Chapter Chapter Eight at-a-Glance Section Title Summary of Content Start Page Error Terms How to use error terms as a preventive maintenance and page 8-2 troubleshooting tool.
Page 648 General Purpose Maintenance Procedures Error Terms Error Terms Using Error Terms as a Diagnostic Tool By examining error terms, you can monitor system performance for preventive maintenance and troubleshooting purposes. The the most common causes of error term anomalies are: —...
Page 649 General Purpose Maintenance Procedures Error Terms To find assemblies related to error term failures, refer to error term descriptions “Error Term Data” on page 8-8. Each description lists common assemblies related to each error term. Identify the assembly and refer to Chapter 4, “Troubleshooting.”...
Page 650 General Purpose Maintenance Procedures Error Terms S = Source Match R = Reflection Tracking The error terms are the same for a one port measurement on Port 2 (S Figure 8-2 Flowgraph of Two-Port Error Terms where: E = error term 1st Subscript: D = Directivity S = Source Match...
Page 651 General Purpose Maintenance Procedures Error Terms Figure 8-3 Flowgraph of Three-Port Error Terms where: E = error term DIR = Directivity MAT = Forward Source Match and Reverse Load Match TRK = Forward Reflection Tracking and Reverse Transmission Tracking For the case of a full 3-port calibration, port 1 has three Match error terms: S11 source match S12 load match...
Page 652 General Purpose Maintenance Procedures Error Terms Figure 8-4 Flowgraph of Four-Port Error Terms where: E = error term DIR = Directivity MAT = Forward Source Match and Reverse Load Match TRK = Forward Reflection Tracking and Reverse Transmission Tracking For the case of a full 4-port calibration, port 1 has four Match error terms: S11 source match S12 load match...
Page 653 General Purpose Maintenance Procedures Error Terms — “Front Panel Access to Error Terms” on page 8-7 Programmatically — “GPIB Access to Error Terms” on page 8-7 — “COM/DCOM Access to Error Terms” on page 8-7 Manual Access to Error Terms Front Panel Access to Error Terms Ensure that calibration correction is active by pressing RESPONSE and verifying that the softkey label reads Correction ON/off.
Page 654 General Purpose Maintenance Procedures Error Terms Error Term Data The error term descriptions in this section include the following information: — a table of the error terms — description and significance of each error term — measurements affected by each error term —...
Page 655 General Purpose Maintenance Procedures Error Terms Directivity (E and E and E are the uncorrected forward and reverse directivity error terms of the system. The directivity error of the test port is determined by measuring the and S reflection of the calibration kit load. The load has a much better return loss specification than does the uncorrected test port.
Page 656 General Purpose Maintenance Procedures Error Terms The measurements most affected by load match errors are all transmission measurements, and reflection measurements of a low insertion loss two-port device, such as an airline. Typical Cause of Failure The calibration kit load or a bad “thru” cable is the most common cause of load match specification failure.
Page 657 General Purpose Maintenance Procedures Keysight License Manager Keysight License Manager Accessing the Keysight License Manager Software To start the Keysight License Manager: — Press Start > Keysight License Manager > Keysight License Manager . A Keysight License Manager dialog box will appear. Figure 8-5 Keysight License Manager Window Software Entitlement Certificate...
Page 658 General Purpose Maintenance Procedures Keysight License Manager Enabling or Removing Options There are two types of options: — Hardware: Hardware options involve adding additional hardware to the analyzer. After the proper hardware has been installed in the analyzer, the appropriate license can be installed using the Keysight License Manager. It is necessary to re-enable all installed hardware options, if the midplane board is replaced.
Page 659 General Purpose Maintenance Procedures Keysight License Manager Repairing and Recovering Option Data For information on repairing or recovering option data, refer to Keysight License Manager help on your instrument. Installing or Changing a Serial Number It is necessary to reinstall the instrument serial number if the test set midplane board is replaced.
Page 660 General Purpose Maintenance Procedures Firmware Upgrades Firmware Upgrades How to Check the Current Firmware Version 1. Press UTILITY , then , then System Help About NA... A dialog box showing the current installed Application Code Version is displayed. 2. To determine if a firmware update is available, proceed to “Downloading from the Internet.”...
Page 661 General Purpose Maintenance Procedures Operating System Recovery Operating System Recovery Recovering from Solid State Drive Problems If you suspect that you have a solid state drive problem, go to the “Hard Drive Recovery” link on the Keysight PNA Series: Service & Support Home Page on the Internet.
Page 662 General Purpose Maintenance Procedures Correction Constants Correction Constants The analyzer stores many correction constants in non-volatile EEPROM memory. These constants enable the analyzer to produce accurate, leveled source signals and receive clean test signals. Storing Correction Constants After performing any adjustment listed on page 3-51 in this manual, store the correction constants to a backup file on the analyzer solid state drive by...
Page 663 Keysight Technologies - Appendix N52xxB Microwave Network Analyzers Service Guide EEPROM Address Assignments and Location (N5224/5A&B PNA and N5244/5A&B PNA-X Instruments) Table A-1 EEPROM Address Assignments and Location Physical Location Board Rev Letter Cal Body Contents Addr E080 A16 SPAM...
Page 664 EEPROM Address Assignments and Location (N5224/5A&B PNA and N5244/5A&B PNA-X Instruments) Table A-1 (Continued)EEPROM Address Assignments and Location (Continued) Physical Location Board Rev Letter Cal Body Contents Addr A4 LO Synth rev 4 (N5230-60002) Synth Power Cal E580 A4 LO Synth rev 5 (N5242-60150/166) A4 LO Synth rev 6 (N5240-60074/76)
Page 665 EEPROM Address Assignments and Location (N5224/5A&B PNA and N5244/5A&B PNA-X Instruments) Table A-1 (Continued)EEPROM Address Assignments and Location (Continued) Physical Location Board Rev Letter Cal Body Contents Addr A12 50 GHz Doubler (5087–7318 assembly, 5067–1335 bias board) EB00 Unused A12 50 GHz Doubler (5087-7349 assembly, 5067-1361 bias board) A12 50 GHz Doubler...
Page 666 EEPROM Address Assignments and Location (N5224/5A&B PNA and N5244/5A&B PNA-X Instruments) Appendix–4 Service Guide...
Page 667 Installation Note Xxxxx-xxxxx...
Page 668 This information is subject to change without notice. © Keysight Technologies 2009-2023 Edition 1, February 2023 N5245-90026 www.keysight.com...