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Keysight Technologies N5221/2A Series Service Manual
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Keysight Technologies N5221/2A Series Service Manual

Keysight Technologies N5221/2A Series Service Manual

2-port and 4-port pna - microwave network analyzers
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N5221/2A
2-Port and 4-Port
PNA - Microwave Network
Analyzers - Service Guide
N5221/2A Series -
(10 MHz - 13.5 GHz)
(10 MHz - 26.5 GHz)
This is the Service Guide for the N5221/2A Series Microwave Network Analyzers.
SERVICE GUIDE
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Summary of Contents for Keysight Technologies N5221/2A Series

  • Page 1 N5221/2A 2-Port and 4-Port PNA - Microwave Network Analyzers - Service Guide N5221/2A Series - (10 MHz - 13.5 GHz) (10 MHz - 26.5 GHz) This is the Service Guide for the N5221/2A Series Microwave Network Analyzers. SERVICE GUIDE...
  • Page 2 TERMS IN THE SEPARATE AGREEMENT WILL CONTROL. extent that those terms, rights, or licenses are explicitly required Technology Licenses © Keysight Technologies, Inc. from all providers of commercial 2011-2023 computer software pursuant to The hardware and/or software No part of this manual may be...
  • Page 5 Contents Table of Contents 1. Safety Information in This Chapter ..........1-1 Chapter One at-a-Glance .
  • Page 6 Contents Instrument Specifications ..........3-8 System Verification Procedure .
  • Page 7 Contents Assembly Replacement Sequence..........4-3 Getting Started with Troubleshooting .
  • Page 8 Contents Signal Separation Group Operation ......... . . 5-17 Configurable Test Set .
  • Page 9 Contents Miscellaneous Part Numbers ..........6-105 7.
  • Page 10 Contents 8. General Purpose Maintenance Procedures Information in This Chapter ........... 8-1 Chapter Eight at-a-Glance .
  • Page 11 Contents Keysight N5221A/22A Service Guide...
  • Page 12 Contents Keysight N5221A/22A Service Guide...
  • Page 13 Keysight Microwave Network Analyzers 2-Port and 4-Port PNA Series Service Guide Safety 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. Chapter One at-a-Glance Section Title Summary of Content...
  • Page 14 Safety 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 Safety 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 General Safety Considerations Ventilation Requirements: When installing the product in a cabinet, the convection into and out of the product must not be restricted. The ambient temperature (outside the cabinet) must be less than the maximum operating temperature of the instrument by 4 °C for every 100 watts dissipated in the cabinet.
  • Page 17 Safety 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 General Safety Considerations Figure 1-1 Location of Calibration Stickers on PNA Keysight N5221A/22A Service Guide...
  • Page 19 Safety 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. Static discharges too small to be felt can cause permanent damage.
  • Page 20 Safety Electrostatic Discharge Protection Figure 1-2 ESD Protection Setup Keysight N5221A/22A Service Guide...
  • Page 21 Safety 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 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 If the battery on the A17 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 2-8 for assistance.
  • Page 24 Safety Regulatory Information 1-12 Keysight N5221A/22A Service Guide...
  • Page 25 Keysight Microwave Network Analyzers 2-Port and 4-Port PNA Series 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 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 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/7018-02943/configuration-guides/ 5990-7745.pdf.
  • Page 28 General Product Information Required Service Test Equipment Required Service Test Equipment Critical Specifications Recommended Alternate Model or Equipment Model or Part Part Number Number Test Instruments and Software Compression None specified U3070AK01 None test set Dynamic accuracy None specified U3020AD01 None test set N7840A...
  • Page 29 General Product Information Required Service Test Equipment Required Service Test Equipment (Cont’d) Critical Specifications Recommended Alternate Model Equipment Model or Part or Part Number Number Calibration and Verification Kits 3.5 mm calibration kit Freq: 10 MHz to 26.5 GHz 85052B 85052D P,T,V 3.5 mm verification kit...
  • Page 30 General Product Information Required Service Test Equipment Critical Specifications Recommended Alternate Equipment Model or Part Model Number Number 5/16 inch, open-end torque wrench 1.1 and 2.4 N-m (10 and 21 T, R (metric equivalent is 8 mm) in-lb) settings (for semi-rigid cables) 1 inch, open-end torque wrench 8.1 N-m (72 in-lb) setting (for...
  • Page 31 — 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 Keysight for repair. If you wish to send your network analyzer to Keysight Technologies for service or repair: —...
  • Page 33 Keysight Microwave Network Analyzers 2-Port and 4-Port PNA Series 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 Setups and procedures for adjusting your analyzer: page 3-41 Adjustments — 10 MHz Frequency Reference Adjustment — Synthesizer Bandwidth Adjustment — Source Adjustment — IF Gain Adjustment —...
  • Page 36 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 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 2-8. 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 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 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, available online at: https://www.keysight.com/us/en/assets/9018-03942/technical-specificatio ns/9018-03942.pdf (N5221-90002) and https://www.keysight.com/us/en/assets/9018-03871/technical-specificatio ns/9018-03871.pdf (N5221-90001). These specifications apply when the analyzer is used to make either raw or error-corrected measurements.
  • Page 41 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 Tests and Adjustments ANSI/NCSL Z540.3–2006 and ISO/IEC 17025 Verification ANSI/NCSL Z540.3–2006 and ISO/IEC 17025 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 .
  • Page 43 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 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 3-14 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 they are 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 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 4-26 to begin troubleshooting to determine the faulty component.
  • Page 47 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 48 Tests and Adjustments Preliminary Checks 7. Press UTILITY Macro , then . Select Calset 1 and Adapter Char Calset 2 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 49 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 50 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 51 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 52 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 53 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 54 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 55 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 56 Tests and Adjustments System Verification choose to load an existing recent calibration. 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 57 Tests and Adjustments System Verification Kit Substitution Non-Keysight calibration kits and verification kits are not recommended nor supported. System Verification Procedure 1. If you desire printed test outputs, connect a printer to the analyzer. For the printer, ensure that the correct driver is loaded and the printer is defined as the default printer.
  • Page 58 Tests and Adjustments System Verification — Print Graphs: Prints the verification data in graphical form. The graphical form includes the measured data trace, factory supplied data trace, and uncertainty limits. For an example, refer to Figure 3-13 on page 3-30. —...
  • Page 59 Tests and Adjustments System Verification Figure 3-11 System Verification Failure Flowchart Interpreting the Verification Results Figure 3-12 shows an example of typical verification results with Print Tabular Data selected in the Printer Output area of the System Verification dialog box. At the top of the printed output is the name of the device, the serial number of the device, and the date tested.
  • Page 60 Tests and Adjustments System Verification Figure 3-12 Example of Printed Tabular Verification Results 3-28 Keysight N5221A/22A Service Guide...
  • Page 61 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 62 Tests and Adjustments System Verification Figure 3-13 Example of Printed Graphical Verification Results 3-30 Keysight N5221A/22A Service Guide...
  • Page 63 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 897 and Option 898. 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 64 Tests and Adjustments Performance Tests 5. The power meter correction table is set to the same frequency. 6. The output power is measured, and the value is compared to the Preset setting. 7. This process is repeated at hundreds of frequencies across the analyzer’s full range.
  • Page 65 Tests and Adjustments Performance Tests If the Analyzer Fails this Test: Troubleshoot the source section of the analyzer and then repeat this test. Refer “Checking the Source Group” on page 4-32. Source Power Linearity Test Function of the Test: To verify that the power level is linear over the analyzer’s frequency range and to check the linearity of the automatic leveling control (ALC).
  • Page 66 Tests and Adjustments Performance Tests Frequency Accuracy Test Function of the Test: To verify the frequency accuracy and range of the analyzer’s source output. Specification Tested: Test Port Output–CW Accuracy Equipment Used: — Frequency counter — Test cable — Adapters Description of the Test: This test is performed over the full frequency range of the source synthesizer board, not the full frequency range of the analyzer.
  • Page 67 Tests and Adjustments Performance Tests Description of the Test: Trace Noise is a calculation of the standard deviation of a 201 point CW measurement. In a healthy analyzer, this measurement is only affected by the sampling error of the analog to digital converters on the SPAM board. Ports 1 and 2 are tested as a pair using S21 and S12 measurements.
  • Page 68 Tests and Adjustments Performance Tests — Two test cables — Calibration kit — 10-dB and 20-dB pads if the analyzer does not have an internal step attenuator Description of the Test: For most analyzer models, the receiver compression level is higher than the maximum source output power.
  • Page 69 Tests and Adjustments Performance Tests — If the analyzer still fails this test, 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.
  • Page 70 Tests and Adjustments Performance Tests 10.The corrected noise floor in dBm is calculated for a 10 Hz IF bandwidth using: PNoiseFloor = Ptest – 19.96 dB – (Preset Power – Pref). If the Analyzer Fails this Test: — If the analyzer fails this test, 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.
  • Page 71 Tests and Adjustments Performance Tests — Failure of the source or load match error terms is due to faulty hardware between the test port and the internal source. Refer to Chapter 7, “Repair and Replacement Procedures.” for instructions on replacing the suspected faulty component or assembly.
  • Page 72 Tests and Adjustments Performance Tests 7. With the 1 dB of overlap in each measurement, the data for each attenuator setting can be stitched together to provide a complete receiver linearity profile from +3 dBm to -63 dBm. 8. This test is repeated for each receiver. If the Analyzer Fails this Test: —...
  • Page 73 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. — “10 MHz Frequency Reference Adjustment” on page 3-41 — “Synthesizer Bandwidth Adjustment”...
  • Page 74 Tests and Adjustments Adjustments Figure 3-14 Equipment Setup for the 10 MHz Frequency Reference Adjustment Service Adjustments 2. Press UTILITY , then , then , then click System 10 MHz Freq Adjustment. 3. Ensure the GPIB settings are correct. 4. Follow the instructions and prompts as they are displayed. Synthesizer Bandwidth Adjustment This adjusts the bandwidth of the 13.5 GHz synthesizers.
  • Page 75 Tests and Adjustments Adjustments Procedure 1. Connect the equipment as shown in Figure 3-15. Connect a GPIB cable between the network analyzer and the power meter. Figure 3-15 Equipment Setup for the Source Adjustment Service Adjustments 2. .Press UTILITY System , then , then , then click...
  • Page 76 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 3-16, to establish a reference for flatness.
  • Page 77 Tests and Adjustments Adjustments Figure 3-16 Equipment Setup 1 for the Receiver Adjustment Service Adjustments 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 3-17 Equipment Setup 2 for the Receiver Adjustment Keysight N5221A/22A Service Guide...
  • Page 78 Tests and Adjustments Adjustments Figure 3-18 Equipment Setup 3 for the Receiver Adjustment EE Default Adjustment This sets the EEPROM data to their default values. Procedure Service Adjustments 1. Press UTILITY System , then , then , then click EE Default Adjustment.
  • Page 79 Keysight Microwave Network Analyzers 2-Port and 4-Port PNA Series 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 80 Troubleshooting Information in This Chapter Chapter Four at-a-Glance Section Title Summary of Content Start Page Getting Started with A starting point for troubleshooting. page 4-4 Troubleshooting Power Up Troubleshooting Power-up problems: page 4-6 — Power supply problems — LCD problems —...
  • Page 81 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. Protect Against Electrostatic Discharge (ESD) This is important.
  • Page 82 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 83 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 “Power Up Go to Troubleshooting” “Front Panel Go to Troubleshooting” “Rear Panel Go to Troubleshooting”...
  • Page 84 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 85 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 86 Troubleshooting Power Up Troubleshooting Figure 4-2 A15 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 87 Troubleshooting Power Up Troubleshooting If any one individual voltage supply from the A16 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 A16 power supply itself, or any assembly to which the A16 power supply provides voltage.
  • Page 88 Troubleshooting Power Up Troubleshooting 1. Unplug the A19 test set motherboard ribbon cable from the A19 test set motherboard (refer to “Removing and Replacing the A19 Test Set Motherboard” on page 7-29). 2. Unplug the A19 test set motherboard to A20 IF multiplexer board ribbon cable from the A20 IF multiplexer board (refer to “Removing and Replacing the A20 IF Multiplexer Board”...
  • Page 89 Troubleshooting Power Up Troubleshooting Check for shorts (zero Ω) or very low resistance (approximately 1 Ω). If a short or low resistance is measured, isolate each of the remaining four boards in the following order, and recheck the shorted test point after each board is removed.
  • Page 90 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 7-60.
  • Page 91 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 A17 CPU board.
  • Page 92 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 93 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 94 Troubleshooting Front Panel Troubleshooting Table 4-2 Front Panel Keyboard Key Names TRACE/CHAN RESPONSE ENTRY ENTRY Keys Keys Keys Keys (Cont’d) Trace 4 Display Bk Sp Traces STIMULUS Keys Channel Freq Navigation MARKER/ Power Keys ANALYSIS Keys Marker Sweep ← → Search Trigger ↑...
  • Page 95 Troubleshooting Front Panel Troubleshooting A3 Display Test The display should be bright with all annotations and text readable. The display test allows you to check for non-functioning pixels and other problems. If the display is dim or dark, refer to “Troubleshooting LCD Display Problems”...
  • Page 96 Troubleshooting Front Panel Troubleshooting A1 Front Panel Interface Board This assembly performs the following functions: — It routes USB signals between the front-panel USB connector and the A17 CPU board. — The speaker produces the audio output from signals supplied by the A17 CPU board.
  • Page 97 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 98 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 99 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 100 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 101 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 102 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 103 Troubleshooting Rear Panel Troubleshooting Figure 4-5 Construction of a Crossover Cable Keysight N5221A/22A Service Guide 4-25...
  • Page 104 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 105 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 106 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 107 Troubleshooting Measurement System Troubleshooting Figure 4-8 Typical 8-Receiver Display for 4-Port Models — If all traces are present and are similar to the traces in Figure 4-7 Figure 4-8, 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 108 Troubleshooting Measurement System Troubleshooting — A10 frequency reference — A4 and A13 13.5 GHz source synthesizers — A5 and A8 sources — A11 13.5 GHz LO synthesizer — A21 HMA26.5 — A22 splitter — A19 test set motherboard — the signal separation group —...
  • Page 109 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 110 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 111 Troubleshooting Measurement System Troubleshooting Equipment Setup 1. Before starting these checks, zero and calibrate the power meter. (See the power meter user’s guide for instructions on setting the calibration factor.) 2. If the Receiver Display (Figure 4-7 Figure 4-8) is not on the analyzer Service screen, perform the following: Press UTILITY , then...
  • Page 112 Troubleshooting Measurement System Troubleshooting — for LO related problems, continue testing at “Checking the A11 13.5 GHz LO Synthesizer Output”. — for source related problems, continue testing at “Checking the A4 and A13 Source Synthesizer Outputs” on page 4-37. Checking the A11 13.5 GHz LO Synthesizer Output 1.
  • Page 113 Troubleshooting Measurement System Troubleshooting 3. Connect the spectrum analyzer to the open connector on the A21 HMA 26.5. 4. Refer to Note on page 4-26. Set the network analyzer for a 800 MHz CW frequency and observe the spectrum analyzer measurement. For analyzers with DSP version 4.0, an 807.61 MHz signal should be present.
  • Page 114 Troubleshooting Measurement System Troubleshooting Figure 4-9 Comparison of Legacy HMA26.5 (5087-7765) and New HMA26.5 (N5240-60101) Checking the A22 Splitter Output IMPORTANT! Some PNAs have installed a legacy HMA26.5 (5087-7765) that is used with a discrete A22 splitter. Some PNAs have installed a new HMA26.5 (N5240-60101) with an integrated splitter.
  • Page 115 Troubleshooting Measurement System Troubleshooting 7. If the signal is present, reconnect cables W43 and W44, and then continue with “Checking the Receiver Group” on page 4-42. Checking the A4 and A13 Source Synthesizer Outputs 1. Refer to the block diagram at the end of this chapter and to “Top Cables, All Cables—All Options”...
  • Page 116 Troubleshooting Measurement System Troubleshooting 5. Refer to Note on page 4-26. 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 117 Troubleshooting Measurement System Troubleshooting Equipment Used for This Check Equipment Type Model or Alternate Model or Part Number Part Number Power meter E4418B/E441B E4418A/E4419A Power sensor, 3.5 mm E8485A None Adapter, 3.5 mm (f) to 3.5 mm (f) 83059B 85052-60012 Equipment Setup 1.
  • Page 118 Troubleshooting Measurement System Troubleshooting — “Bottom RF Cables, Standard 2-Port Configuration, Option 200” on page 6-23 — “Bottom Assemblies, 2-Port, Option 219” on page 6-47 — “Bottom RF Cables, 2-Port, Option 219” on page 6-49 — “Bottom Assemblies, Standard 4-Port Configuration, Option 400” on page 6-54 —...
  • Page 119 Troubleshooting Measurement System Troubleshooting — Port 1; W71 of A25 — Port 2; W83 of A28 — Port 3; W75 of A26 — Port 4; W79 of A27 2. Using a 5/16-inch torque wrench, disconnect the semirigid cable at the receiver coupler.
  • Page 120 Troubleshooting Measurement System Troubleshooting Checking the Receiver Group Equipment Used for These Tests Equipment Type Model or Alternate Model or Part Part Number Number Spectrum analyzer 8565E 856xE a. Refer to Note on page 4-26. Must be capable of measuring signals at 7.61 MHz (analyzers with DSP version 4.0), or 7.44 MHz (analyzers with DSP version 5.0), and 1 GHz.
  • Page 121 Troubleshooting Measurement System Troubleshooting 4. With the covers off, plug in the analyzer and turn on the power. 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.
  • Page 122 Troubleshooting Measurement System Troubleshooting If the measured signal is missing on any receiver (other than the R1 receiver noted above) and the analyzer does not have receiver attenuators, replace the A23 or A24 mixer brick, whichever is appropriate. Refer to “Removing and Replacing the A23 and A24 Mixer Bricks”...
  • Page 123 Troubleshooting Measurement System Troubleshooting — Receiver A; W59 — Receiver R1; W60 — Receiver R2; W61 — Receiver B; W62 — 4-port models — Receiver A; W59 — Receiver B; W60 — Receiver C; W61 — Receiver D; W62 — Receiver R; W63 2.
  • Page 124 Troubleshooting Instrument Block Diagrams Sheet 1 Instrument Block Diagrams Sheet 1 Microwave PNA, N5221A/22A, 2–Port 4-46 Keysight N5221A/22A Service Guide...
  • Page 125 N5221A/22A 2-Port Overall Block Diagram (Includes Options 200-Standard; 201-Configurable Test Set; 210-Metrology; 217-Attenuators; and 219-Bias Tees Service Guide: N5222-90001 DISPLAY USB BD A20 IF MULTIPLEXER A12 SIGNAL PROCESSING IF = 0.826 MHz for CW Freq < 53 MHz OPTION 200 OR 210 ADC MODULE (SPAM) IF = 7.438 MHz for CW Freq >...
  • Page 126 Troubleshooting Instrument Block Diagrams Sheet 2 Instrument Block Diagrams Sheet 2 Microwave PNA, N5221A/22A, 4–Port 4-48 Keysight N5221A/22A Service Guide...
  • Page 127 N5221A/22A 4-Port Overall Block Diagram (Includes Options 400-Standard; 401-Configurable Test Set; 410-Metrology; 4 17-Attenuators; and 419-Bias Tees Service Guide: N5222-90001 DISPLAY USB BD A20 IF MULTIPLEXER A12 SIGNAL PROCESSING IF = 0.826 MHz for CW Freq < 53 MHz OPTION 400 OR 410 ADC MODULE (SPAM) IF = 7.438 MHz for CW Freq >...
  • Page 128 Troubleshooting Instrument Block Diagrams Sheet 2 4-50 Keysight N5221A/22A Service Guide...
  • Page 129 Keysight Microwave Network Analyzers 2-Port and 4-Port PNA Series Service Guide Theory of Operation Information in This Chapter This chapter provides a general description of the operating theory of the N5221A/22A 2-port and 4-port PNA microwave network analyzers. — Theory of operation is explained to the assembly level only. —...
  • Page 130 Theory of Operation Information in This Chapter Chapter Five at-a-Glance Section Title Summary of Content Start Page Network Analyzer System A summary of the theory of operation for the analyzer. page 5-3 Operation A summary of the operation of the major functional groups of the analyzer.
  • Page 131 Theory of Operation 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 132 Theory of Operation Network Analyzer System Operation Figure 5-2 2-Port System Simplified Block Diagram 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 133 Theory of Operation Network Analyzer System Operation Synthesized Source Group The built-in synthesized source generates a swept, stepped, or continuous wave (CW) signal in the frequency ranges as listed in Table 5-3. The source group provides five signals: an LO signal and four incident signals. The LO signal and the four incident signals are offset in frequency by the receiver IF of 7.438 MHz (at tuned frequencies below 53 MHz the IF and the offset is 0.826 MHz).
  • Page 134 Theory of Operation Network Analyzer System Operation Receiver Group The receiver converts the test and reference signals to 7.438 MHz intermediate frequency (IF) signals for signal processing, retaining both magnitude and phase characteristics. The IF signals are converted to digital information by the digital processing group.
  • Page 135 Theory of Operation Synthesized Source Group Operation Synthesized Source Group Operation The source group produces a stable output signal by phase locking a synthesized voltage-controlled oscillator (VCO). Refer to Table 5-3 on page 5-10 for the full frequency range of the source. The outputs at the front panel test ports are swept, stepped or CW signals.
  • Page 136 Theory of Operation Synthesized Source Group Operation than the test signal. Since the A4, A13, and A11 13.5 GHz synthesizer boards each receive their 50 MHz input reference signal from the exact same source, frequency drift error is eliminated. Keysight N5221A/22A Service Guide...
  • Page 137 Theory of Operation Synthesized Source Group Operation Figure 5-3 Source Group Keysight N5221A/22A Service Guide...
  • Page 138 Theory of Operation Synthesized Source Group Operation Band Mixer     Brick A5/A8 A4/A13 L.O. HMA26.5 Source Synthesizer Synthesizer Harm. Frequency (GHz) Frequency (GHz) Frequency (GHz) Frequency (GHz) Nmbr. 0.01083 to 0.05383 0.01083 to 0.05383 0.010 to 0.053 0.010 to 0.053 0.06044 to 0.18244 0.06044 to 0.18244...
  • Page 139 Theory of Operation Synthesized Source Group Operation Refer to Table 5-3 Figure 5-3 for band numbers and frequencies discussed here. In bands 2-10, the output of the swept VCO is passed directly or through a divide-by-2, 4, or 8 circuit to produce the output frequencies as listed in Table 5-3.
  • Page 140 Theory of Operation Synthesized Source Group Operation A21 Multiplier/Amplifier 26.5 Board (HMA26.5) In bands 2–15, the synthesized LO input is filtered, amplified, and passed through to the A22 splitter (4-port only). In bands 16-21, the input is amplified, doubled, and filtered, then sent to the output. Together, these signal paths create the full output frequency range of 10 MHz to 26.5 GHz that is sent to the A22 splitter (4-port only) where the signal is divided and sent to the A23 and A24 (4-port only) mixer bricks as the LO...
  • Page 141 Theory of Operation Synthesized Source Group Operation — to route control signals to the signal separation group. Refer to “Signal Separation Group Operation” on page 5-17 for more information. Rear Panel Interconnects The A19 test set motherboard includes the following rear panel interconnects. TEST SET I/O A DB-25 female connector that is used to control external test sets.
  • Page 142 Theory of Operation Synthesized Source Group Operation Table 5-1 TEST SET I/O Connector Pin Assignments DB-25 Female Connector Pin Numbers Name Function AD11 TTL I/O, address and latched data SEL3 TTL out, test set select bit 3, tied to 0 V 19–21 AD7–5 TTL I/O, address and latched data...
  • Page 143 Theory of Operation Synthesized Source Group Operation Table 5-2 HANDLER I/O Connector Pin Assignments Rectangular 36-Pin Female Connector Pin Numbers Name Function Pass Fail TTL out, latched, indicates pass fail (programmable polarity) +5 V +5 Vdc, 100 mA max. Sweep End TTL out, active low (10 μs min) indicates sweep done Pass/Fail Write TTL out, active low pass/fail write strobe (1 μs min)
  • Page 144 Theory of Operation Synthesized Source Group Operation Table 5-3 PWR I/O Connector Pin Assignments DB-9 Female Connector Name Description AnalogIn1 Analog input: ±10 V @ 1.22 mV typical resolution Rin > 1 M-ohm BW ≈ 1 MHz ADC conversion time < 1 us typical AnalogIn2 Analog input: ±10 V @ 1.22 mV typical resolution...
  • Page 145 Theory of Operation 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 5-4 on page 5-19 Figure 5-5 on page 5-20. —...
  • Page 146 Theory of Operation Signal Separation Group Operation — the A31 test port 4 coupler and the A24 mixer brick receiver D — the A32 test port 2 coupler and the A23 mixer brick receiver B Normal Measurement Configuration For those analyzers equipped with configurable test set and source attenuators, with the inclusion of an external amplifier and accessories, you can calibrate the analyzer and test devices at power levels up to +30 dBm.
  • Page 147 Theory of Operation Signal Separation Group Operation Figure 5-4 4-Port Signal Separation Group Keysight N5221A/22A Service Guide 5-19...
  • Page 148 Theory of Operation Signal Separation Group Operation Figure 5-5 2-Port Signal Separation Group 5-20 Keysight N5221A/22A Service Guide...
  • Page 149 Theory of Operation Signal Separation Group Operation A34–A37 65-dB Source Step Attenuators and A38–A41 Bias Tees On 4-port models with some options, a step attenuator and a bias tee are placed in the signal path of each test port between the A25–A28 receiver couplers and the A29–A32 test port couplers.
  • Page 150 Theory of Operation Receiver Group Operation Receiver Group Operation The receiver group measures and processes the input signals into digital information for processing and eventual display. Figure 5-6 on page 5-25 Figure 5-7 on page 5-26 are simplified block diagrams of the receiver functional group for 2-port and 4-port analyzers respectively.
  • Page 151 Theory of Operation Receiver Group Operation than the source incident signal to produce a 7.438 MHz IF signal. This synthesized source comes from the A21 HMA26.5 (via the A22 splitter for 4-port models). At frequencies below 53 MHz, the IF is set to 0.826 MHz. The analog IF signal is sent to the A20 IF multiplexer board where it is processed and then sent to the A12 SPAM board.
  • Page 152 Theory of Operation Receiver Group Operation Table 5-4 PULSE I/O Connector Pin Assignments DB-15 Female Connector Name Description DCOM Digital ground PulseSyncIn Pulse generator synchronization trigger input (TTL) RFPulseModIn RF source pulse modulation drive input (TTL) DCOM Digital ground Pulse1Out Programmable pulse train output #1 (TTL) Pulse2Out Programmable pulse train output #2 (TTL)
  • Page 153 Theory of Operation Receiver Group Operation Figure 5-6 4-Port Receiver Group Keysight N5221A/22A Service Guide 5-25...
  • Page 154 Theory of Operation Receiver Group Operation Figure 5-7 2-Port Receiver Group 5-26 Keysight N5221A/22A Service Guide...
  • Page 155 Theory of Operation 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 156 Theory of Operation Digital Processing and Digital Control Group Operation Figure 5-8 Digital Processing and Digital Control Group 5-28 Keysight N5221A/22A Service Guide...
  • Page 157 Theory of Operation 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 A17 CPU board by way of the A14 system motherboard.
  • Page 158 Theory of Operation 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 159 Theory of Operation 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 160 Theory of Operation Power Supply Group Operation Power Supply Group Operation The A16 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 161 Rebuilt-Exchange Assemblies The definition of a rebuilt-exchange assembly. page 6-4 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 6-6 their associated part number and description.
  • Page 162 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 2-8.
  • Page 163 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 164 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 165 Replaceable Parts Rebuilt-Exchange Assemblies Figure 6-1 Module Exchange Procedure Keysight N5221A/22A Service Guide...
  • Page 166 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 167 Replaceable Parts Replaceable Parts Listings Table 6-1 Part Number Listing by Reference Designator (Continued) Reference Description Location Designator Test set motherboard Your option set determines which assemblies are in your PNA. Refer to IF multiplexer board “Bottom Assemblies and Cables by Option Set:”...
  • Page 168 Replaceable Parts Replaceable Parts Listings a. The A22 splitter (5087-7139) and N5222-20007, N5222-20008, N5222-20009, and N5222-20067 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 7-15 on page 36 and for details on A22 splitter and cabling , refer to your option-model in Chapter 6...
  • Page 169 Replaceable Parts Replaceable Parts Listings Table 6-2 Part Number Listing by Type of Part Service Tools on page 6-105 — Documentation on page 6-106 — GPIB Cables/GPIB Adapter on page 6-106 — Fuses on page 6-106 — ESD Supplies on page 6-106 —...
  • Page 170 Replaceable Parts Replaceable Parts Listings Front Panel Assembly, Front Side, All Options The N5245-60024 (Was N5247-60004) 2-port front panel assembly and the N5245-60022 (Was N5247-60005) 4-port front panel assembly contain the items shown in the following table. Reference Part Number Description Designator N5247-20137...
  • Page 171 Replaceable Parts Replaceable Parts Listings Figure 6-2 Front Panel Assembly, Front Side, All Options Keysight N5221A/22A Service Guide 6-11...
  • Page 172 Replaceable Parts Replaceable Parts Listings Front Panel Assembly, Back Side, All Options Reference Part Number Description Designator N5240-60065 Front panel interface board Was N5240-60046 N5240-60063 USB board Was N5240-60047 not shown N5242-60010 Ribbon cable, 60-wire, A14 system motherboard J9 to A1 front panel interface board J1 N5242-40001 Keypad assembly...
  • Page 173 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Designator 2190-0017 Lock washer, helical #8 (To use with 0515-0667 screw.) Display assembly 0515-2329 (LED) Machine screw, M3.0 x 10 pan head (To attach LCD display to bracket.) 0515-0664 (Tube) critical footnote 2090-1036 (LED) LCD display 2090-0883 (Tube)
  • Page 174 Replaceable Parts Replaceable Parts Listings Figure 6-3 Front Panel Assembly, Back Side, All Options Figure 6-4 A3 Display Assembly with Old LCD Display 2090-0883 6-14 Keysight N5221A/22A Service Guide...
  • Page 175 Replaceable Parts Replaceable Parts Listings Figure 6-5 A3 Display Assembly with New LCD Display 2090-1036 Keysight N5221A/22A Service Guide 6-15...
  • Page 176 Replaceable Parts Replaceable Parts Listings Top Assemblies and Cables, All Options Top Assemblies, All Options When replacing an old assembly, install an assembly with either the same part number or the new part number. Reference Serial Number Part Number Description Designator Prefixes Affected...
  • Page 177 Replaceable Parts Replaceable Parts Listings Reference Serial Number Part Number Description Designator Prefixes Affected All prefixes – N5242-60133 Solid state drive (SSD) for Windows 7 Operating Version 7 Was:N5242-60088 System- to be used with the Version 7, System CPU All prefixes – Solid state drive (SSD) for Windows 7 Operating N8984A Version 7...
  • Page 178 Replaceable Parts Replaceable Parts Listings Figure 6-6 Top Assemblies, All Options 6-18 Keysight N5221A/22A Service Guide...
  • Page 179 Replaceable Parts Replaceable Parts Listings Top Cables, All Cables—All Options Reference Part Number Description Type Designator N5222-20066 A4 13.5 GHz (source 1) synthesizer board J1207 to A5 26.5 GHz source (1) board P1 N5222-20090 A13 13.5 GHz (source 2) synthesizer board J1207 to A8 26.5 GHz source (2) board P1 N5222-20062 A5 source (1) board P5 to W4 on bottom of analyzer.
  • Page 180 Replaceable Parts Replaceable Parts Listings Figure 6-7 Top Cables, All Cables—All Options 6-20 Keysight N5221A/22A Service Guide...
  • Page 181 Replaceable Parts Replaceable Parts Listings 2-Port Configuration, Option 200 Bottom Assemblies, Standard 2-Port Configuration, Option 200 Reference Description Part Number Designator N5245-60163 Test set motherboard Was N5245-60003 IF multiplexer board N5240-60062 Was N5240-60045 5087-7765 LO Multiplier/amplifier 26.5 (HMA26.5) 5087-7829 Mixer brick Was 5087-7766 5087-7757 Test port 1 receiver coupler...
  • Page 182 Replaceable Parts Replaceable Parts Listings Figure 6-8 Bottom Assemblies, Standard 2-Port Configuration, Option 200 6-22 Keysight N5221A/22A Service Guide...
  • Page 183 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, Standard 2-Port Configuration, Option 200 Reference Part Number Description Type Designator Refer to “Top Cables, All Cables—All Options” on page 6-19. N5222-20040 W3 to A25 port 1 receiver coupler Refer to “Top Cables, All Cables—All Options” on page 6-19.
  • Page 184 Replaceable Parts Replaceable Parts Listings Figure 6-9 Bottom RF Cables, Standard 2-Port Configuration, Option 200 6-24 Keysight N5221A/22A Service Guide...
  • Page 185 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, Standard 2-Port Configuration, Option 200 Reference Part Number Description Type Designator N5225-60001 A19 test set motherboard J221 to port 1 LED board J1 N5242-60005 Rear-panel PWR I/O to A19 test set motherboard J301 N5242-60006 A19 test set motherboard J212 to A23 mixer brick (1) N5225-60001...
  • Page 186 Replaceable Parts Replaceable Parts Listings Figure 6-10 Bottom Ribbon Cables and Wire Harnesses, Standard 2-Port Configuration, Option 200 6-26 Keysight N5221A/22A Service Guide...
  • Page 187 Replaceable Parts Replaceable Parts Listings 2-Port Configuration, Option 201 Bottom Assemblies, 2-Port, Option 201 Reference Description Part Number Designator N5245-60163 Test set motherboard Was N5245-60003 IF multiplexer board N5240-60062 Was N5240-60045 5087-7765 LO Multiplier/amplifier 26.5 (HMA26.5) 5087-7829 Mixer brick Was 5087-7766 5087-7757 Test port 1 receiver coupler Test port 2 receiver coupler...
  • Page 188 Replaceable Parts Replaceable Parts Listings Figure 6-11 Bottom Assemblies, 2-Port, Option 201 6-28 Keysight N5221A/22A Service Guide...
  • Page 189 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 2-Port, Option 201 Reference Part Number Description Type Designator Refer to “Top Cables, All Cables—All Options” on page 6-19. N5222-20040 W3 to A25 port 1 receiver coupler Refer to “Top Cables, All Cables—All Options” on page 6-19.
  • Page 190 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator W116 N5222-20069 Port 2 CPLR THRU to A32 port 2 coupler W117 N5222-20071 A32 port 2 coupler to front-panel Port 2 CPLR ARM W149 & Refer to “Top Cables, All Cables—All Options” on page 6-19.
  • Page 191 Replaceable Parts Replaceable Parts Listings Figure 6-12 Bottom RF Cables, 2-Port, Option 201 Keysight N5221A/22A Service Guide 6-31...
  • Page 192 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 201 Reference Part Number Description Type Designator N5242-60009 A19 test set motherboard J221 to port 1 LED board J1 N5242-60002 A19 test set motherboard J3 to A33 reference mixer switch N5242-60005 Rear-panel PWR I/O to A19 test set motherboard J301 N5242-60006...
  • Page 193 Replaceable Parts Replaceable Parts Listings Figure 6-13 Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 201 Keysight N5221A/22A Service Guide 6-33...
  • Page 194 Replaceable Parts Replaceable Parts Listings 2-Port Configuration, Option 210 Bottom Assemblies, 2-Port, Option 210 Reference Description Part Number Designator N5245-60163 Test set motherboard Was N5245-60003 IF multiplexer board N5240-60062 Was N5240-60045 5087-7765 LO Multiplier/amplifier 26.5 (HMA26.5) 5087-7829 Mixer brick Was 5087-7766 5087-7757 Test port 1 receiver coupler Test port 2 receiver coupler...
  • Page 195 Replaceable Parts Replaceable Parts Listings Figure 6-14 Bottom Assemblies, 2-Port, Option 210 Keysight N5221A/22A Service Guide 6-35...
  • Page 196 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 2-Port, Option 210 Reference Part Number Description Type Designator Refer to “Top Cables, All Cables—All Options” on page 6-19. N5222-20040 W3 to A25 port 1 receiver coupler Refer to “Top Cables, All Cables—All Options” on page 6-19.
  • Page 197 Replaceable Parts Replaceable Parts Listings Figure 6-15 Bottom RF Cables, 2-Port, Option 210 Keysight N5221A/22A Service Guide 6-37...
  • Page 198 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 210 Reference Part Number Description Type Designator N5225-60001 A19 test set motherboard J221 to port 1 LED board J1 N5242-60005 Rear-panel PWR I/O to A19 test set motherboard J301 N5242-60006 A19 test set motherboard J212 to A23 mixer brick (1) N5225-60001...
  • Page 199 Replaceable Parts Replaceable Parts Listings Figure 6-16 Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 210 Keysight N5221A/22A Service Guide 6-39...
  • Page 200 Replaceable Parts Replaceable Parts Listings 2-Port Configuration, Option 217 Bottom Assemblies, 2-Port, Option 217 Reference Description Part Number Designator N5245-60163 Test set motherboard Was N5245-60003 IF multiplexer board N5240-60062 Was N5240-60045 5087-7765 LO Multiplier/amplifier 26.5 (HMA26.5) 5087-7829 Mixer brick Was 5087-7766 5087-7757 Test port 1 receiver coupler Test port 2 receiver coupler...
  • Page 201 Replaceable Parts Replaceable Parts Listings Figure 6-17 Bottom Assemblies, 2-Port, Option 217 Keysight N5221A/22A Service Guide 6-41...
  • Page 202 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 2-Port, Option 217 Reference Part Number Description Type Designator Refer to “Top Cables, All Cables—All Options” on page 6-19. N5222-20040 W3 to A25 port 1 receiver coupler Refer to “Top Cables, All Cables—All Options” on page 6-19.
  • Page 203 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5222-20037 Front-panel Port 2 RCVR B IN to A45 port 2 receiver attenuator N5222-20010 A45 port 2 receiver attenuator to A23 mixer brick (B) W114 N5222-20068 A29 port 1 coupler to front-panel Port 1 CPLR THRU W115 N5222-20070 A29 port 1 coupler to front-panel Port 1 CPLR ARM...
  • Page 204 Replaceable Parts Replaceable Parts Listings Figure 6-18 Bottom RF Cables, 2-Port, Option 217 6-44 Keysight N5221A/22A Service Guide...
  • Page 205 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 217 Reference Part Number Description Type Designator N5242-60009 A19 test set motherboard J221 to port 1 LED board J1 N5242-60002 A19 test set motherboard J3 to A33 reference mixer switch N5242-60005 Rear-panel PWR I/O to A19 test set motherboard J301 N5242-60008...
  • Page 206 Replaceable Parts Replaceable Parts Listings Figure 6-19 Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 217 6-46 Keysight N5221A/22A Service Guide...
  • Page 207 Replaceable Parts Replaceable Parts Listings 2-Port Configuration, Option 219 Bottom Assemblies, 2-Port, Option 219 Reference Description Part Number Designator N5245-60163 Test set motherboard Was N5245-60003 IF multiplexer board N5240-60062 Was N5240-60045 5087-7765 LO Multiplier/amplifier 26.5 (HMA26.5) 5087-7829 Mixer brick Was 5087-7766 5087-7757 Test port 1 receiver coupler Test port 2 receiver coupler...
  • Page 208 Replaceable Parts Replaceable Parts Listings Figure 6-20 Bottom Assemblies, 2-Port, Option 219 6-48 Keysight N5221A/22A Service Guide...
  • Page 209 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 2-Port, Option 219 Reference Part Number Description Type Designator Refer to “Top Cables, All Cables—All Options” on page 6-19. N5222-20040 W3 to A25 port 1 receiver coupler Refer to “Top Cables, All Cables—All Options” on page 6-19.
  • Page 210 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5222-20031 Front-panel Port 1 RCVR A IN to A42 port 1 receiver attenuator N5222-20004 A42 port 1 receiver attenuator to A23 mixer brick (A) N5222-20037 Front-panel Port 2 RCVR B IN to A45 port 2 receiver attenuator N5222-20010 A45 port 2 receiver attenuator to A23 mixer brick (B) W115...
  • Page 211 Replaceable Parts Replaceable Parts Listings Figure 6-21 Bottom RF Cables, 2-Port, Option 219 Keysight N5221A/22A Service Guide 6-51...
  • Page 212 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 219 Reference Part Number Description Type Designator N5242-60009 A19 test set motherboard J221 to port 1 LED board J1 N5242-60002 A19 test set motherboard J3 to A33 reference mixer switch N5242-60005 Rear-panel PWR I/O to A19 test set motherboard J301 N5242-60008...
  • Page 213 Replaceable Parts Replaceable Parts Listings Figure 6-22 Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 219 Keysight N5221A/22A Service Guide 6-53...
  • Page 214 Replaceable Parts Replaceable Parts Listings 4-Port Configuration, Option 400 Bottom Assemblies, Standard 4-Port Configuration, Option 400 Reference Description Part Number Designator N5245-60163 Test set motherboard Was N5245-60003 IF multiplexer board N5240-60062 Was N5240-60045 5087-7765 LO Multiplier/amplifier 26.5 (HMA26.5) 5087-7139 Splitter 5087-6139 5087-7829 Mixer brick...
  • Page 215 Replaceable Parts Replaceable Parts Listings Figure 6-23 Bottom Assemblies, Standard 4-Port Configuration, Option 400 Keysight N5221A/22A Service Guide 6-55...
  • Page 216 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, Standard 4-Port Configuration, Option 400 Reference Part Number Description Type Designator Refer to “Top Cables, All Cables—All Options” on page 6-19. N5222-20040 W3 to A25 port 1 receiver coupler Refer to “Top Cables, All Cables—All Options” on page 6-19.
  • Page 217 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator W100 N5222-20079 A28 port 2 receiver coupler A23 mixer brick (R2) W101 N5222-20084 A25 port 1 receiver coupler to A29 port 1 coupler W102 N5222-20085 A26 port 3 receiver coupler to A30 port 3 coupler W103 N5222-20082 A27 port 4 receiver coupler to A31 port 4 coupler...
  • Page 218 Replaceable Parts Replaceable Parts Listings Figure 6-24 Bottom RF Cables, Standard 4-Port Configuration, Option 400 6-58 Keysight N5221A/22A Service Guide...
  • Page 219 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, Standard 4-Port Configuration, Option 400 Reference Part Number Description Type Designator N5242-60009 A19 test set motherboard J221 to ports 1/3 LED board J1 N5242-60005 Rear-panel PWR I/O to A19 test set motherboard J301 N5242-60006 A19 test set motherboard J212 to A23 mixer brick (1) N5242-60006...
  • Page 220 Replaceable Parts Replaceable Parts Listings Figure 6-25 Bottom Ribbon Cables and Wire Harnesses, Standard 4-Port Configuration, Option 400 6-60 Keysight N5221A/22A Service Guide...
  • Page 221 Replaceable Parts Replaceable Parts Listings 4-Port Configuration, Option 401 Bottom Assemblies, 4-Port, Option 401 Reference Description Part Number Designator N5245-60163 Test set motherboard Was N5245-60003 IF multiplexer board N5240-60062 Was N5240-60045 5087-7765 LO Multiplier/amplifier 26.5 (HMA26.5) 5087-7139 Splitter 5087-6139 5087-7829 Mixer brick Was 5087-7766 5087-7757...
  • Page 222 Replaceable Parts Replaceable Parts Listings Figure 6-26 Bottom Assemblies, 4-Port, Option 401 6-62 Keysight N5221A/22A Service Guide...
  • Page 223 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 4-Port, Option 401 Reference Part Number Description Type Designator Refer to “Top Cables, All Cables—All Options” on page 6-19. N5222-20040 W3 to A25 port 1 receiver coupler Refer to “Top Cables, All Cables—All Options” on page 6-19.
  • Page 224 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5222-20055 Port 4 RCVR D IN to A24 mixer brick (D) N5222-20052 Port 2 RCVR B IN to A23 mixer brick (B) N5222-20033 A33 reference mixer switch to front-panel REF 1 SOURCE OUT N5222-20032 REF 1 RCVR R1 IN to A33 reference mixer switch N5222-20039...
  • Page 225 Replaceable Parts Replaceable Parts Listings Figure 6-27 Bottom RF Cables, 4-Port, Option 401 Keysight N5221A/22A Service Guide 6-65...
  • Page 226 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 401 Reference Part Number Description Type Designator N5242-60009 A19 test set motherboard J221 to ports 1/3 LED board J1 N5242-60002 A19 test set motherboard J3 to A33 reference mixer switch N5242-60005 Rear-panel PWR I/O to A19 test set motherboard J301 N5242-60006...
  • Page 227 Replaceable Parts Replaceable Parts Listings Figure 6-28 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 401 Keysight N5221A/22A Service Guide 6-67...
  • Page 228 Replaceable Parts Replaceable Parts Listings 4-Port Configuration, Option 410 Bottom Assemblies, 4-Port, Option 410 Reference Description Part Number Designator N5245-60163 Test set motherboard Was N5245-60003 IF multiplexer board N5240-60062 Was N5240-60045 5087-7765 LO Multiplier/amplifier 26.5 (HMA26.5) 5087-7139 Splitter 5087-6139 5087-7829 Mixer brick Was 5087-7766 5087-7757...
  • Page 229 Replaceable Parts Replaceable Parts Listings Figure 6-29 Bottom Assemblies, 4-Port, Option 410 Keysight N5221A/22A Service Guide 6-69...
  • Page 230 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 4-Port, Option 410 Reference Part Number Description Type Designator Refer to “Top Cables, All Cables—All Options” on page 6-19. N5222-20040 W3 to A25 port 1 receiver coupler Refer to “Top Cables, All Cables—All Options” on page 6-19.
  • Page 231 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator W100 N5222-20079 A28 port 2 receiver coupler to A23 mixer brick (R2) W105 N5222-20088 A29 port 1 coupler to A23 mixer brick (A) W106 N5222-20089 A30 port 3 coupler to A24 mixer brick (C) W107 N5222-20087 A31 port 4 coupler to A24 mixer brick (D)
  • Page 232 Replaceable Parts Replaceable Parts Listings Figure 6-30 Bottom RF Cables, 4-Port, Option 410 6-72 Keysight N5221A/22A Service Guide...
  • Page 233 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 410 Reference Part Number Description Type Designator N5242-60009 A19 test set motherboard J221 to ports 1/3 LED board J1 N5242-60005 Rear-panel PWR I/O to A19 test set motherboard J301 N5242-60006 A19 test set motherboard J212 to A23 mixer brick (1) N5242-60006...
  • Page 234 Replaceable Parts Replaceable Parts Listings Figure 6-31 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 410 6-74 Keysight N5221A/22A Service Guide...
  • Page 235 Replaceable Parts Replaceable Parts Listings 4-Port Configuration, Option 417 Bottom Assemblies, 4-Port, Option 417 Reference Description Part Number Designator N5245-60163 Test set motherboard Was N5245-60003 IF multiplexer board N5240-60062 Was N5240-60045 5087-7765 LO Multiplier/amplifier 26.5 HMA26.5) 5087-7139 Splitter 5087-6139 5087-7829 Mixer brick Was 5087-7766 5087-7757...
  • Page 236 Replaceable Parts Replaceable Parts Listings Figure 6-32 Bottom Assemblies, 4-Port, Option 417 6-76 Keysight N5221A/22A Service Guide...
  • Page 237 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 4-Port, Option 417 (Ports 1 and 2) Reference Part Number Description Type Designator Refer to “Top Cables, All Cables—All Options” on page 6-19. N5222-20040 W3 to A25 port 1 receiver coupler Refer to “Top Cables, All Cables—All Options”...
  • Page 238 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5222-20028 A34 port 1 source attenuator to front-panel Port 1 SOURCE OUT N5222-20001 A28 port 2 receiver coupler to A37 port 2 source attenuator N5222-20036 A37 port 2 source attenuator to front-panel Port 2 SOURCE OUT N5222-20031 Port 1 RCVR A IN to A42 port 1 receiver attenuator N5222-20004...
  • Page 239 Replaceable Parts Replaceable Parts Listings Figure 6-33 Bottom RF Cables, 4-Port, Option 417 (Ports 1 and 2) Keysight N5221A/22A Service Guide 6-79...
  • Page 240 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 4-Port, Option 417 (Ports 3 and 4) Reference Part Number Description Type Designator Refer to “Top Cables, All Cables—All Options” on page 6-19. N5222-20041 W5 to A26 port 3 receiver coupler Refer to “Top Cables, All Cables—All Options”...
  • Page 241 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator W149 & Refer to “Top Cables, All Cables—All Options” on page 6-19. W150 a. SR = semirigid coaxial cable; F = flexible coaxial cable Keysight N5221A/22A Service Guide 6-81...
  • Page 242 Replaceable Parts Replaceable Parts Listings Figure 6-34 Bottom RF Cables, 4-Port, Option 417 (Ports 3 and 4) 6-82 Keysight N5221A/22A Service Guide...
  • Page 243 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 417 Reference Part Number Description Type Designator N5242-60009 A19 test set motherboard J221 to ports 1/3 LED board J1 N5242-60002 A19 test set motherboard J3 to A33 reference mixer switch N5242-60005 Rear-panel PWR I/O to A19 test set motherboard J301 N5242-60008...
  • Page 244 Replaceable Parts Replaceable Parts Listings Figure 6-35 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 417 6-84 Keysight N5221A/22A Service Guide...
  • Page 245 Replaceable Parts Replaceable Parts Listings 4-Port Configuration, Option 419 Bottom Assemblies, 4-Port, Option 419 Reference Description Part Number Designator N5245-60163 Test set motherboard Was N5245-60003 IF multiplexer board N5240-60062 Was N5240-60045 5087-7765 LO Multiplier/amplifier 26.5 HMA26.5) 5087-7139 Splitter 5087-6139 5087-7829 Mixer brick Was 5087-7766 5087-7757...
  • Page 246 Replaceable Parts Replaceable Parts Listings Figure 6-36 Bottom Assemblies, 4-Port, Option 419 6-86 Keysight N5221A/22A Service Guide...
  • Page 247 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 4-Port, Option 419 (Ports 1 and 2) Reference Part Number Description Type Designator Refer to “Top Cables, All Cables—All Options” on page 6-19. N5222-20040 W3 to A25 port 1 receiver coupler Refer to “Top Cables, All Cables—All Options”...
  • Page 248 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5222-20036 A37 port 2 source attenuator to front-panel Port 2 SOURCE OUT N5222-20035 Port 2 CPLR THRU to A41 port 2 bias tee N5222-20013 A41 port 2 bias tee to A32 port 2 coupler N5222-20031 Port 1 RCVR A IN to A42 port 1 receiver attenuator N5222-20004...
  • Page 249 Replaceable Parts Replaceable Parts Listings Figure 6-37 Bottom RF Cables, 4-Port, Option 419 (Ports 1 and 2) Keysight N5221A/22A Service Guide 6-89...
  • Page 250 Replaceable Parts Replaceable Parts Listings Bottom RF Cables, 4-Port, Option 419 (Ports 3 and 4) Reference Part Number Description Type Designator Refer to “Top Cables, All Cables—All Options” on page 6-19. N5222-20041 W5 to A26 port 3 receiver coupler Refer to “Top Cables, All Cables—All Options”...
  • Page 251 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5222-20021 Port 3 RCVR C IN to A43 port 3 receiver attenuator N5222-20006 A43 port 3 receiver attenuator to A24 mixer brick (C) N5222-20022 Port 4 RCVR D IN to A44 port 4 receiver attenuator N5222-20026 A44 port 4 receiver attenuator to A24 mixer brick (D) W149 &...
  • Page 252 Replaceable Parts Replaceable Parts Listings Figure 6-38 Bottom RF Cables, 4-Port, Option 419 (Ports 3 and 4) 6-92 Keysight N5221A/22A Service Guide...
  • Page 253 Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 419 Reference Part Number Description Type Designator N5242-60009 A19 test set motherboard J221 to ports 1/3 LED board J1 N5242-60002 A19 test set motherboard J3 to A33 reference mixer switch N5242-60005 Rear-panel PWR I/O to A19 test set motherboard J301 N5242-60008...
  • Page 254 Replaceable Parts Replaceable Parts Listings Figure 6-39 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 419 6-94 Keysight N5221A/22A Service Guide...
  • Page 255 Replaceable Parts Replaceable Parts Listings Rear Panel Assembly, All Options Item Part Description Number Number CPU board. Refer to “Top Assemblies and Cables, All Options” on page 6-16 for part number. Solid state drive assembly (SSDA). Refer to “Top Assemblies and Cables, All Options” on page 6-16 for A51 part numbers.
  • Page 256 Replaceable Parts Replaceable Parts Listings Figure 6-40 Rear Panel Assembly, All Options 6-96 Keysight N5221A/22A Service Guide...
  • Page 257 Replaceable Parts Replaceable Parts Listings Top Hardware and Miscellaneous Parts, All Options Reference Part Number Description Designator 3160-4199 3160-0281 Fan guard Was 3160-4198 0361-1272 Fan rivet N5242-00015 Fan bracket 0515-0372 Machine screw, M3.0 x 8, pan head (5 to attach fan bracket to chassis, 4 to attach power supply bracket to inner panels, left side bracket, and fan bracket, and 3 to attach A14 system motherboard to the chassis.) Chassis (Refer to...
  • Page 258 Replaceable Parts Replaceable Parts Listings Figure 6-42 Top Hardware and Miscellaneous Parts, Top View, All Options 6-98 Keysight N5221A/22A Service Guide...
  • Page 259 Replaceable Parts Replaceable Parts Listings Bottom Hardware and Miscellaneous Parts Reference Part Number Description Designator 0515-0372 Machine screw, M3.0 x 8, pan head (4 to attach A19 test set motherboard to test set deck, 6 to attach A19 test set motherboard to stabilizer bracket, 4 to attach stabilizer bracket to A20 IF mux board, 17 to attach test set deck to chassis, 4 to attach A23–A24 mixer bricks to bottom of mixer brick mounting block, 4 to attach A21 HMA26.5 to its mounting bracket, 8 to attach A34–A37 source attenuators to...
  • Page 260 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Designator N5227-00001 Test set front sub panel, 2-port models without front panel jumpers N5221-00006 Test set front sub panel, 2-port models with front panel jumpers N5221-00007 Test set front sub panel, all 4-port models N5242-00005 Bracket (For A21 HMA26.5.) N5242-00019...
  • Page 261 Replaceable Parts Replaceable Parts Listings Figure 6-43 Bottom Hardware and Miscellaneous Parts, All Options Keysight N5221A/22A Service Guide 6-101...
  • Page 262 Replaceable Parts Replaceable Parts Listings Internal Hardware and Miscellaneous Parts, All Options Reference Part Number Description Designator N5221-00003 Left side inner bracket W1312-00048 Midplane bracket N5221-00002 Right side inner bracket N5242-00001 Chassis 0515-0372 Machine screw, M3.0 x 8, pan head (4 to attach midplane bracket to left and right side inner brackets, 6 to attach front bracket to left and right side inner brackets, 2 to attach side bracket to front bracket, 5 to attach side bracket to chassis, 22 to attach chassis to left and right side inner...
  • Page 263 Replaceable Parts Replaceable Parts Listings Figure 6-44 Internal Hardware and Miscellaneous Parts, All Options Keysight N5221A/22A Service Guide 6-103...
  • Page 264 Replaceable Parts Replaceable Parts Listings External Hardware and Miscellaneous Parts, All Options Reference Part Number Description Designator N5242-00014 Outer cover 5041-9611 Rear foot 0515-1619 Machine screw M4.0 x 25, pan head (To attach rear foot.) N5242-60045  Strap handle assembly (Includes item 0515-0710 Machine screw M5.0 x 18, flat head (To attach strap handle.) 5021-2840...
  • Page 265 Replaceable Parts Replaceable Parts Listings Figure 6-45 External Hardware and Miscellaneous Parts, All Options 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 torque wrench;...
  • Page 266 Replaceable Parts Replaceable Parts Listings Table 6-3 Part Numbers for Miscellaneous Parts and Accessories (Continued) Description Model or Part Number 20 mm open-end torque wrench; 0.9 N-m (8 in-lb) 8710-1764 Spanner wrench 08513-20014 ESD Supplies Adjustable antistatic wrist strap 9300-1367 Antistatic wrist strap grounding cord (5 foot length) 9300-0980 Static control table mat and earth ground wire...
  • Page 267 Replaceable Parts Replaceable Parts Listings Table 6-3 Part Numbers for Miscellaneous Parts and Accessories (Continued) Description Model or Part Number Connector Caps Cap, protective, 0.812-ID 1401-0214 Cap, protective, 0.625-ID 1401-0225 Cap, protective, 1/4 - 36 threads 5188-5406 Memory Modules 1 GB module, DDR SDRAM, 166 MHz, 184-pin 1819-0329 Battery Battery, lithium manganese dioxide, 3V, 0.22A-hr.
  • Page 268 Replaceable Parts Replaceable Parts Listings Table 6-3 Part Numbers for Miscellaneous Parts and Accessories (Continued) Description Model or Part Number Parchment white (for use on rack mount flanges, rack support flanges, and front 6010-1148 panels) a. For rack mount use, you must replace factory installed ruggedized handles (thick aluminum, no trim) with classic handles (thin aluminum with plastic trim), included with Option 1CP.
  • Page 269 Keysight Microwave Network Analyzers 2-Port and 4-Port PNA Series 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 270 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 271 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 272 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 273 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 7-7 Fan bracket and fans page 7-60 Front panel assembly page 7-9 Front panel LED boards page 7-58 Front panel display board page 7-11...
  • Page 274 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 page 7-48 Port 3 source step attenuator Port 4 source step attenuator Port 2 source step attenuator Port 1 bias tee page 7-48 Port 3 bias tee...
  • Page 275 Repair and Replacement Procedures Removing the Covers Removing the Covers Tools Required — T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) — T-20 TORX driver (torque to 21 in-lb or 2.38 N.m) Removing the Outer Cover This procedure is best performed with the analyzer resting on its front handles in the vertical position.
  • Page 276 Repair and Replacement Procedures Removing the Covers Figure 7-1 Outer and Inner Cover Removal Keysight N5221A/22A Service Guide...
  • Page 277 Repair and Replacement Procedures Removing and Replacing the Front Panel Assembly Removing and Replacing the Front Panel Assembly Tools Required — T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) — T-20 TORX driver (torque to 21 in-lb or 2.38 N.m) —...
  • Page 278 Repair and Replacement Procedures Removing and Replacing the Front Panel Assembly Figure 7-2 Front Panel Assembly Removal 7-10 Keysight N5221A/22A Service Guide...
  • Page 279 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-8 TORX driver (torque to 6 in-lb or 0.68 N.m) — T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) —...
  • Page 280 Repair and Replacement Procedures Removing and Replacing the A1–A3 and Other Front Panel Subassemblies Removing the Touchscreen Controller Board  1. Disconnect the touchscreen controller board cable (item ) from the touchscreen controller board and front panel interface board. 2. Disconnect the flat flex cable from the touchscreen. ...
  • Page 281 Repair and Replacement Procedures Removing and Replacing the A1–A3 and Other Front Panel Subassemblies Removing the A3 Display Assembly and the Touchscreen 1. Disconnect the following cables from the A1 front panel interface board:   display cable (item ), inverter board cable (item ), touchscreen ...
  • Page 282 Repair and Replacement Procedures Removing and Replacing the A1–A3 and Other Front Panel Subassemblies  4. The display cable (item ) can be removed by removing the three screws   (item ) that attach it to the LCD display hold down bracket (item 5.
  • Page 283 Repair and Replacement Procedures Removing and Replacing the A4–A13 Boards Removing and Replacing the A4–A13 Boards IMPORTANT! If you are replacing a the A12 SPAM 4 board with a SPAM 5 board, a new operating system is recommended and some new cables are required.
  • Page 284 Repair and Replacement Procedures Removing and Replacing the A4–A13 Boards Replacement Procedure IMPORTANT! If you are replacing a the A12 SPAM 4 board with a SPAM 5 board, a new operating system is recommended and some new cables are required. Refer to “Top Assemblies and Cables, All Options”...
  • Page 285 Repair and Replacement Procedures Removing and Replacing the A4–A13 Boards Figure 7-6 A4, A5, A8, A10, A11, A12, and A13 Boards Removal Keysight N5221A/22A Service Guide 7-17...
  • Page 286 Repair and Replacement Procedures Removing and Replacing the A14 System Motherboard Removing and Replacing the A14 System Motherboard Tools Required — T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) — T-20 TORX driver (torque to 21 in-lb or 2.38N.m) —...
  • Page 287 Repair and Replacement Procedures Removing and Replacing the A14 System Motherboard  10. Remove two screws (item ) from each side that secure the midplane bracket to the chassis left and right inner panels. Lift the midplane bracket out of the analyzer. ...
  • Page 288 Repair and Replacement Procedures Removing and Replacing the A14 System Motherboard Figure 7-7 A14 System Motherboard Removal 7-20 Keysight N5221A/22A Service Guide...
  • Page 289 Repair and Replacement Procedures Removing and Replacing the A15 Midplane Board Removing and Replacing the A15 Midplane Board Tools Required — T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) — T-20 TORX driver (torque to 21 in-lb or 2.38 N.m) —...
  • Page 290 Repair and Replacement Procedures Removing and Replacing the A15 Midplane Board 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-64. Figure 7-8 A15 Midplane Board Removal 7-22 Keysight N5221A/22A Service Guide...
  • Page 291 Repair and Replacement Procedures Removing and Replacing the A16 Power Supply Assembly Removing and Replacing the A16 Power Supply Assembly Tools Required — T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) — T-20 TORX driver (torque to 21 in-lb or 2.38 N.m) —...
  • Page 292 Repair and Replacement Procedures Removing and Replacing the A16 Power Supply Assembly Figure 7-9 A16 Power Supply Assembly Removal 7-24 Keysight N5221A/22A Service Guide...
  • Page 293 Repair and Replacement Procedures Removing and Replacing the A17 CPU Board Assembly Removing and Replacing the A17 CPU Board Assembly Tools Required — T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) — T-20 TORX driver (torque to 21 in-lb or 2.38 N.m) —...
  • Page 294 Repair and Replacement Procedures Removing and Replacing the A17 CPU Board Assembly Figure 7-10 A17 CPU Board Assembly Removal 7-26 Keysight N5221A/22A Service Guide...
  • Page 295 Repair and Replacement Procedures Removing and Replacing the A18 GPIB Board Removing and Replacing the A18 GPIB Board Tools Required — T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) — T-20 TORX driver (torque to 21 in-lb or 2.38 N.m) —...
  • Page 296 Repair and Replacement Procedures Removing and Replacing the A18 GPIB Board Figure 7-11 A18 GPIB Board Removal 7-28 Keysight N5221A/22A Service Guide...
  • Page 297 Repair and Replacement Procedures Removing and Replacing the A19 Test Set Motherboard Removing and Replacing the A19 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 298 Repair and Replacement Procedures Removing and Replacing the A19 Test Set Motherboard  5. Remove connector hardware (item ) from 11 rear panel BNC connectors. (When reinstalling, use a 5/8 inch open end torque wrench set to 21 in-lbs.)  6.
  • Page 299 Repair and Replacement Procedures Removing and Replacing the A19 Test Set Motherboard Figure 7-12 A19 Test Set Motherboard Removal Keysight N5221A/22A Service Guide 7-31...
  • Page 300 Repair and Replacement Procedures Removing and Replacing the A20 IF Multiplexer Board Removing and Replacing the A20 IF Multiplexer Board Tools Required — T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) — T-20 TORX driver (torque to 21 in-lb or 2.38 N.m) —...
  • Page 301 Repair and Replacement Procedures Removing and Replacing the A20 IF Multiplexer Board Figure 7-13 A20 IF Multiplexer Board Removal Keysight N5221A/22A Service Guide 7-33...
  • Page 302 Repair and Replacement Procedures Removing and Replacing the A21 HMA26.5 Removing and Replacing the A21 HMA26.5 Tools Required — T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) — T-20 TORX driver (torque to 21 in-lb or 2.38 N.m) —...
  • Page 303 Repair and Replacement Procedures Removing and Replacing the A21 HMA26.5 Figure 7-14 A21 HMA26.5 Removal 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 304 Repair and Replacement Procedures Removing and Replacing the A21 HMA26.5 — W42 N5222-20009 — W43 N5222-20007 — W44 N5222-20008 The new N5240-60101 HMA26.5 has the splitter integrated into the assembly. Refer to Figure 7-15 on page Figure 7-15 Comparison of Legacy HMA26.5 (5087-7765) and New HMA26.5 (N5240-60101) 7-36 Keysight N5221A/22A Service Guide...
  • Page 305 Repair and Replacement Procedures Removing and Replacing the A22 Splitter Removing and Replacing the A22 Splitter Tools Required — T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) — T-20 TORX driver (torque to 21 in-lb or 2.38 N.m) —...
  • Page 306 Repair and Replacement Procedures Removing and Replacing the A22 Splitter Figure 7-16 A22 Splitter Removal 1. The A22 splitter (5087-7139) and N5222-20007, N5222-20008, N5222-20009, and N5222-20067 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 7-15 on page 36 and for details on A22 splitter and cabling , refer to...
  • Page 307 Repair and Replacement Procedures Removing and Replacing the A23 and A24 Mixer Bricks Removing and Replacing the A23 and A24 Mixer Bricks Tools Required — T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) — T-20 TORX driver (torque to 21 in-lb or 2.38 N.m) —...
  • Page 308 Repair and Replacement Procedures Removing and Replacing the A23 and A24 Mixer Bricks 9. If the A23 mixer brick is to be replaced, disconnect cable W43 from the A23 mixer brick. If the A24 mixer brick is to be replaced, disconnect cable W44 and remove ...
  • Page 309 Repair and Replacement Procedures Removing and Replacing the A23 and A24 Mixer Bricks Figure 7-17 A23 and A24 Mixer Bricks Removal 1. The A22 splitter (5087-7139) and N5222-20007, N5222-20008, N5222-20009, and N5222-20067 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 7-15 on page 36 and for details on A22 splitter and cabling , refer to...
  • Page 310 Repair and Replacement Procedures Removing and Replacing the A25–A28 Receiver Couplers and Mounting Brackets Removing and Replacing the A25–A28 Receiver Couplers and Mounting Brackets Tools Required — T-6 TORX driver (torque to 4 in-lb or 0.45 N.m) — T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) —...
  • Page 311 Repair and Replacement Procedures Removing and Replacing the A25–A28 Receiver Couplers and Mounting Brackets Figure 7-18 A25 through A28 Receiver Couplers Removal 1. The A22 splitter (5087-7139) and N5222-20007, N5222-20008, N5222-20009, and N5222-20067 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 7-15 on page 36 and for details on A22 splitter and cabling , refer to...
  • Page 312 Repair and Replacement Procedures Removing and Replacing the A29–A32 Test Port Couplers Removing and Replacing the A29–A32 Test Port Couplers Tools Required — T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) — T-20 TORX driver (torque to 21 in-lb or 2.38 N.m) —...
  • Page 313 Repair and Replacement Procedures Removing and Replacing the A29–A32 Test Port Couplers Figure 7-19 A29 through A32 Test Port Couplers Removal Keysight N5221A/22A Service Guide 7-45...
  • Page 314 Repair and Replacement Procedures Removing and Replacing the A33 Reference Mixer Switch Removing and Replacing the A33 Reference Mixer Switch Tools Required — T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) — T-20 TORX driver (torque to 21 in-lb or 2.38 N.m) —...
  • Page 315 Repair and Replacement Procedures Removing and Replacing the A33 Reference Mixer Switch 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-64. Figure 7-20 A33 Reference Mixer Switch Removal Keysight N5221A/22A Service Guide 7-47...
  • Page 316 Repair and Replacement Procedures Removing and Replacing the A34–A37 Source Attenuators, the A38–A41 Bias Tees, and the A42–A45 Receiver Attenuators Removing and Replacing the A34–A37 Source Attenuators, the A38–A41 Bias Tees, and the A42–A45 Receiver Attenuators Tools Required — T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) —...
  • Page 317 Repair and Replacement Procedures Removing and Replacing the A34–A37 Source Attenuators, the A38–A41 Bias Tees, and the A42–A45 Receiver Attenuators  11. Remove two screws (item ) to remove the attenuator or bias tee to be replaced, from the mounting bracket. Replacement Procedure 1.
  • Page 318 Repair and Replacement Procedures Removing and Replacing the A34–A37 Source Attenuators, the A38–A41 Bias Tees, and the A42–A45 Receiver Attenuators Figure 7-21 Source and Receiver Step Attenuators and Bias Tees Removal 7-50 Keysight N5221A/22A Service Guide...
  • Page 319 Repair and Replacement Procedures Removing and Replacing the A38–A41 Bias Tees Removing and Replacing the A38–A41 Bias Tees Tools Required — T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) — T-20 TORX driver (torque to 21 in-lb or 2.38 N.m) —...
  • Page 320 Repair and Replacement Procedures Removing and Replacing the A38–A41 Bias Tees Torque all cable connections to 10 in-lbs. Remember to place the wire harness cable ground lug on the proper mounting screw. 2. As shown in Figure 7-23, position the bias tees on the attenuator brackets so that the port 1 and port 3 bias tees capacitors face each other.
  • Page 321 Repair and Replacement Procedures Removing and Replacing the A38–A41 Bias Tees Figure 7-23 Orientation of Bias Tee Capacitors Keysight N5221A/22A Service Guide 7-53...
  • Page 322 Repair and Replacement Procedures Removing and Replacing the A51 Solid State Drive (SSD) Removing and Replacing the A51 Solid State Drive (SSD) Certain unique files exist on the solid state drive (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 323 Repair and Replacement Procedures Removing and Replacing the A51 Solid State Drive (SSD) Figure 7-24 Solid State Drive Replacement Install Backup Files onto the New Solid State Drive The files that were previously saved onto a USB flash memory drive must now be installed onto the new SSD.
  • Page 324 Repair and Replacement Procedures Removing and Replacing the Rear Panel Removing and Replacing the Rear Panel Tools Required — T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) — T-20 TORX driver (torque to 21 in-lb or 2.38 N.m) —...
  • Page 325 Repair and Replacement Procedures Removing and Replacing the Rear Panel Figure 7-25 Rear Panel Removal Keysight N5221A/22A Service Guide 7-57...
  • Page 326 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 (torque to 9 in-lb or 1.02 N.m) — T-20 TORX driver (torque to 21 in-lb or 2.38 N.m) —...
  • Page 327 Repair and Replacement Procedures Removing and Replacing the Front Panel LED Boards Figure 7-26 Front Panel LED Boards Removal Keysight N5221A/22A Service Guide 7-59...
  • Page 328 Repair and Replacement Procedures Removing and Replacing the Fans Removing and Replacing the Fans Tools Required — T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) — T-20 TORX driver (torque to 21 in-lb or 2.38 N.m) — Pozidriv screw driver —...
  • Page 329 Repair and Replacement Procedures Removing and Replacing the Fans Figure 7-27 B1 Fan Removal Keysight N5221A/22A Service Guide 7-61...
  • Page 330 Repair and Replacement Procedures Removing and Replacing the Lithium Battery Removing and Replacing the Lithium Battery Tools Required — T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) — T-20 TORX driver (torque to 21 in-lb or 2.38 N.m) —...
  • Page 331 Repair and Replacement Procedures Removing and Replacing the Lithium Battery Figure 7-28 Lithium Battery Removal Keysight N5221A/22A Service Guide 7-63...
  • Page 332 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 333 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 334 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 A12 SPAM board Source Adjustment Noise Floor Test IF Gain Adjustment Trace Noise Test Receiver Characterization Receiver Adjustment IF Response Adjustment (Option 090, 093, or 094 Only)
  • Page 335 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 A21 HMA26.5 EE Default Adjustment: LO Drive Noise Floor Test only Receiver Compression Test EE Default Adjustment: LO Drive Dynamic Accuracy Test Noise Figure only (Option 029 equipped...
  • Page 336 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 bias tees Source Adjustment Source Maximum Power Output IF Gain Adjustment Test Receiver Characterization Calibration Coefficients Test Receiver Adjustment IF Response Adjustment (Option...
  • Page 337 Repair and Replacement Procedures Post-Repair Procedures Figure 7-29 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 338 Repair and Replacement Procedures Post-Repair Procedures To store the backup data, perform these steps: — Navigate to the EEPROM Backup Utility, located at: — Windows 7 -- C:\Program Files (x86)\Keysight\Network Analyzer\Service\eebackup.exe — Windows 10 -- C:\Program Files\Keysight\Network Analyzer\Service\eebackup.exe — Run the program. —...
  • Page 339 Keysight Microwave Network Analyzers 2-Port and 4-Port PNA Series 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 340 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 magnitude and shape of the error terms are affected by: —...
  • Page 341 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 342 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 343 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 344 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 345 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 346 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 347 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 348 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 349 General Purpose Maintenance Procedures Option Enable Utility Option Enable Utility Accessing the Option Enable Utility To start the option enable utility: Service Option Enable — Press UTILITY , then , then System — A dialog box similar to the one illustrated in Figure 8-5 is displayed.
  • Page 350 General Purpose Maintenance Procedures Option Enable Utility Identifying Your Instrument’s Host ID From the online Keysight HostID utility: — Part of the OEC procedure to obtain the 12-digit license key online requires you to provide the HostID number of the PNA. This HostID number is NOT the one currently shown on the PNA.
  • Page 351 General Purpose Maintenance Procedures Option Enable Utility 2. Click the arrow in the Select Desired Option box. A list of available options, similar to the list below, will appear. 020 - Add IF inputs 021 - Pulse Modulator on Source 1 022 - Pulse Modulator on Source 2 025 - 4-Receiver Pulse Generator 086 - Gain Compression Application...
  • Page 352 General Purpose Maintenance Procedures Option Enable Utility 3. Click Begin Repair. The data is written from the gen.lic file into the EEPROM. — If the solid state drive is replaced, a new gen.lic file is automatically created when the Network Analyzer application starts, by retrieving the data from the EEPROM.
  • Page 353 General Purpose Maintenance Procedures Firmware Upgrades 3. If an error is made in entering the serial number, obtain a clear code from Keysight, enter the clear code in the space provided and click CLEAR. The correct serial number can then be entered. To change an incorrect serial number, a clear-code password is required.
  • Page 354 General Purpose Maintenance Procedures Operating System Recovery Operating System Recovery Recovering from Solid State Drive (SSD) 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 355 Keysight Technologies - Appendix N52xxA/B Microwave Network Analyzers Service Guide EEPROM Address Assignments and Location (N5221/2A&B PNA and N5241/2/9A&B PNA-X Instruments) Table A-1 EEPROM Address Assignments and Location Physical Location Board Rev Letter Cal Body Contents Addr E080 A12 SPAM...
  • Page 356 EEPROM Address Assignments and Location (N5221/2A&B PNA and N5241/2/9A&B PNA-X Instruments) Table A-1 (Continued)EEPROM Address Assignments and Location Physical Location Board Rev Letter Cal Body Contents Addr A13 LO Synth rev 4 (N5230-60002) Synth Power Cal E500 A13 LO Synth rev 5 (N5242-60150/166) A13 LO Synth rev 6 (N5240-60074/76)
  • Page 357 Index Numerics troubleshooting illustrated typical power output procedure 13.5 GHz LO synthesizer board A trace troubleshooting operation troubleshooting , 28, A14 system motherboard part number A1 front panel interface board illustrated removal and replacement illustrated operation illustrated part number part number procedure removal and replacement removal and replacement...
  • Page 358 Index removal and replacement removal and replacement illustrated , 13, illustrated illustrated procedure procedure procedure troubleshooting , 12, A2 USB board troubleshooting A30 test port 3 coupler illustrated A25 test port 1 receiver coupler illustrated , 55, 62, 69, part number illustrated operation , 22, 28, 35, 41, 48, 55,...
  • Page 359 Index troubleshooting troubleshooting part number A36 test port 4 source step A42 test port 1 receiver step A7 noise receiver board attenuator attenuator illustrated illustrated illustrated part number , 85, , 41, 85, part number operation A8 26.5 GHz source 2 board removal and replacement part number illustrated...
  • Page 360 removal mixer brick replacement processing B receiver external replaceable parts subgroup troubleshooting illustrated receiver group typical power output part numbers receiver step B1 fan feet attenuators removal and replacement illustrated reference mixer illustrated part numbers switch procedure frequency reference board signal separation bandwidth, synthesizer...
  • Page 361 Index replaceable ribbon wire illustrated in bottom assembly, , 89, harnesses Option 219 part numbers , 87, illustrated illustrated , 26, 33, replaceable ribbon cables part numbers part numbers illustrated , 25, 32, bottom assembly, Option 219 in bottom assembly, part numbers replaceable assemblies Option 219/H85...
  • Page 362 Index in bottom assembly, operator’s Option 200 accessories used in constants illustrated description of correction , 26, 33, part numbers contacting Keysight dialog box , 25, 32, controllers in bottom assembly, failure of troubleshooting with Option 219 performing correction constants illustrated preliminary coupler...
  • Page 363 Index D trace rear panel connector shape affected by troubleshooting source match test dangerous voltage typical data running data using as diagnostic tool display assembly acquisition using to aid illustrated operation troubleshooting documentation worse than typical values subgroup part numbers option dress panel protection...
  • Page 364 Index checking current version illustrated illustrated upgrades parts list part number flowgraph replacement troubleshooting of one port error terms USB board troubleshooting of two port error terms , 4, 5, illustrated knob using to identify error part number illustrated terms USB controller board part number frequency...
  • Page 365 Index procedure illustrated isolation cause of failure hardware procedure definition of in bottom assembly troubleshooting measurements affected by illustrated IF response part numbers adjustment insertion loss in external analyzer check illustrated keypad assembly failure of part numbers illustrated test port cables in internal analyzer operation installing...
  • Page 366 Index part number normal front panel illustrated replacement system , 58, troubleshooting part number illustrated , 22, 28, 35, 41, 48, 55, traceability network analyzer, See 62, 69, part number path , 21, 27, 34, 40, 47, analyzer noise floor, test uncertainty 54, 61, 68, 75, linearity...
  • Page 367 Index SPAM board–analog part numbers required for servicing SPAM board–digital paint replaceable wire harnesses system motherboard touch-up illustrated test port couplers part numbers part numbers test set motherboard part numbers Option 400, bottom assembly operator’s check accessories replaceable RF cables accessories used in illustrated , 58, 65,...
  • Page 368 Index bottom assembly, Option 200 in front panel assembly , 25, illustrated Option , 11, part numbers 419/H85 bottom assembly, , 10, in internal analyzer in external analyzer Option 219 illustrated front panel bottom assembly, part numbers assembly Option 219/H85 , 10, in rear panel assembly in internal analyzer...
  • Page 369 Index compression operation Display part number software, internal EXT 10 MHz REF IN removal and replacement source maximum power GPIB illustrated output HANDLER I/O procedure source power troubleshooting accuracy TEST SET I/O power switch source power board linearity parts list test port output maxi- interconnects , 12, 13, 23,...
  • Page 370 Index block diagram procedure part numbers , 25, defined troubleshooting in bottom assembly, Option reference receiver, See R 219/H85 operation part numbers troubleshooting , 40, receiver regulatory information in bottom assembly, Option linearity removing dynamic accuracy assemblies, See specific illustrated , 55, 62, test part numbers...
  • Page 371 Index part numbers in bottom assembly, A19 test set motherboard Option 219/H85 illustrated in bottom assembly, illustrated Option 400 procedure illustrated part numbers A2 USB board , 58, 65, part numbers in bottom assembly, illustrated , 56, 63, Option 400 in bottom assembly, procedure illustrated...
  • Page 372 Index A33 reference mixer switch procedure illustrated illustrated A5 26.5 GHz source 1 board procedure procedure illustrated touch screen A34 test port 1 source step procedure illustrated , 13, attenuator A51 hard disk drive procedure illustrated illustrated USB controller board procedure procedure illustrated...
  • Page 373 Index part numbers required illustrated operation in bottom assembly, test equipment part number Option 400 required removal and replacement illustrated tools , 60, 67, illustrated part numbers part numbers , 59, 66, procedure in bottom assembly, required troubleshooting Option 419 warnings source 2 board illustrated...
  • Page 374 Index receiver characterization trace noise replacement test equipment , 48, required for service troubleshooting source calibration required for servicing source synthesizer test port replacement , 48, bandwidth cable checks troubleshooting checks connector repeatability storage data getting ready failure motherboard dynamic accuracy test strap handle illustrated maximum output power...
  • Page 375 Index illustrated illustrated test port coupler , 50, , 85, part number troubleshooting procedure , 48, removal and replacement TEST SET I/O troubleshooting illustrated connector test port 2 receiver coupler pin assignments procedure illustrated , 22, 28, 35, 41, 48, 55, rear panel troubleshooting 62, 69,...
  • Page 376 Index front panel A43 test port 3 receiver step trace C illustrated attenuator trace D A44 test port 4 receiver step trace R part number attenuator typical power output troubleshooting A45 test port 2 receiver step Port 1 A1 front panel interface attenuator Port 2 board...
  • Page 377 Index dialog box part numbers in bottom assembly, Option 219/H85 illustrated VCO (voltage-controlled part numbers oscillator) in bottom assembly, defined Option 400 ventilation requirements illustrated , 60, 67, verification part numbers , 59, 66, ANSI/NCSL Z540-1-1994 in bottom assembly, kits , 5, Option 419 substitution...
  • Page 378 Index Keysight N5221A/22A Service Guide...
  • Page 379 Installation Note Xxxxx-xxxxx...
  • Page 380 This information is subject to change without notice. © Keysight Technologies 2011-2023 Edition 1, March 2023 N5222-90001 www.keysight.com...