Page 1 Service Guide Keysight 2-Port and 4-Port PNA-X Microwave Network Analyzer This manual provides documentation for the following model: N5247B (10 MHz to 67 GHz)
Page 2 DOCUMENT THAT CONFLICT WITH THESE TERMS, THE WARRANTY beyond those set forth in the TERMS IN THE SEPARATE EULA shall apply, except to the © Keysight Technologies, Inc. AGREEMENT WILL CONTROL. extent that those terms, rights, or 2009-2022 licenses are explicitly required...
Page 3: Table Of Contents
System Specifications ........... 3-7 Keysight N5247B Service Guide...
Page 4 Synthesizer Bandwidth Adjustment ........3-56 Keysight N5247B Service Guide...
Page 5 Instrument Simplified Block Diagrams – LFE ........4-56 2-Port N5290A System Block Diagram (201 and 205) ......4-56 Keysight N5247B Service Guide...
Page 6 Synthesizers) ............. 4-62 Microwave PNA-X, N5247B – 2-Port, Non-LFE and Non-DDS (Version 6 Synthesizers) . . .
Page 7 2-Port Configurations, Serial Number Prefixes ≥6021 ......6-58 4-Port Configuration, Serial Number Prefixes <6021 ......6-84 Keysight N5247B Service Guide...
Page 8 Removing and Replacing the A50–A53 Bypass Switches and the A54 Combiner ..7-57 Removing and Replacing the A55 Solid State Drive (SSD) ......7-60 Keysight N5247B Service Guide...
Page 9 Storing Correction Constants..........8-16 Keysight N5247B Service Guide...
Page 10 Contents Keysight N5247B Service Guide...
Page 11: Safety And Regulatory Information
Keysight Microwave Network Analyzers 2-Port and 4-Port PNA-X Service Guide Safety and Regulatory Information Information in This Chapter This chapter provides safety information that will help protect you and your network analyzer. It also contains information that is required by various government regulatory agencies.
Page 12: Safety Symbols
Warning denotes a hazard. It calls attention to a procedure which, if not correctly performed or adhered to, could result in injury or loss of life. Do not proceed beyond a warning note until the indicated conditions are fully understood and met. Keysight N5247B Service Guide...
Page 13: General Safety Considerations
This instrument has autoranging line voltage input. Be sure the supply voltage is within the specified range. This product is designed for use in Installation Category II and Pollution Degree 2 per IEC 61010-1:2001 and 664 respectively. Keysight N5247B Service Guide...
Page 14 The measuring terminals on this instrument are designed to be used with external signals described in Measurement Category I, but NOT with external signals described in Categories II, III, and IV. The input of this instrument cannot be connected to the mains. Keysight N5247B Service Guide...
Page 15: Servicing
There are no replaceable fuses in the mains input or within the power supply assembly. Keysight personnel: after calibration is completed, attach four “calibration void if seal broken” stickers to the PNA as shown in Figure 1-1. Keysight N5247B Service Guide...
Page 16 Safety and Regulatory Information General Safety Considerations Figure 1-1 Location of Calibration Stickers on PNA Keysight N5247B Service Guide...
Page 17: Electrostatic Discharge Protection
3. Connect the other end of the cable to the test port and remove the short from the cable. Figure 1-2 shows a typical ESD protection setup using a grounded mat and wrist strap. Refer to “ESD Supplies” on page 6-205 for part numbers. Keysight N5247B Service Guide...
Page 18 Safety and Regulatory Information Electrostatic Discharge Protection Figure 1-2 ESD Protection Setup Keysight N5247B Service Guide...
Page 19: Regulatory Information
This symbol indicate the presence of a Laser device. This symbol indicates the surface can be hot. This symbol indicated the product is sensitive to electrostatic discharge. Keysight N5247B Service Guide...
Page 20 This is a space saver label that combines two markings - CAN ICES and ISM. This is a symbol of an Industrial Scientific and Medical Group 1 Class A product (CISPR 11, Clause 5). South Korean Certification (KC) mark. It includes the marking’s identifier code. 1-10 Keysight N5247B Service Guide...
Page 21 25 ± 5 °C). Storage Temperature –40 °C to +70 °C Error-corrected range 23 °C ±3 °C with less than 1 °C deviation from calibration temperature. Keysight N5247B Service Guide 1-11...
Page 22: Lithium Battery Disposal
If the battery on the A21 CPU board assembly needs to be disposed of, dispose of it in accordance with your country’s requirements. If required, you may return the battery to Keysight Technologies for disposal. Refer to “Contacting Keysight” on page 2-7 for assistance.
Page 23: General Product Information
Keysight Microwave Network Analyzers 2-Port and 4-Port PNA-Series Installation and 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.
Page 24: Maintenance
Use a dry cloth or one slightly dampened with water to clean the external case parts. Do not attempt to clean internally. Electrical Maintenance Refer to “Review the Principles of Connector Care” on page 3-5. Keysight N5247B Service Guide...
Page 25: Analyzer Options, Accessories, And Upgrades Available
The adapter contains 11 SMB-male coaxial connectors and a mating connector for the rear-panel PULSE I/O connector. This adapter can be ordered as model number N1966A. Figure 2-1 N1966A Pulse I/O Adapter Keysight N5247B Service Guide...
Page 26: Required Service Test Equipment
If an accurate measurement of the dynamic accuracy specification is not required, the E4418A or E4419A can be used. e. This sensor and adapter must be calibrated together by the Keysight factory. The data supplied is only valid as long as the sensor and adapter remain connected. Keysight N5247B Service Guide...
Page 27 Critical Specifications Recommended Alternate Equipment Model or Part Model Number Number Tools T-8 TORX driver 0.6 N-m (5 in-lb) setting T-10 TORX driver 0.5, 0.8, and 1.0 N-m (4, 7, and 9 in-lb) settings Keysight N5247B Service Guide...
Page 28 USB flash ROM drive None P,A,R a. Unless specified otherwise, equipment listed is required for all analyzer models. b. P = Performance tests, A = Adjustments, T = Troubleshooting, R = Repair, V = System verification Keysight N5247B Service Guide...
Page 29: Keysight Support, Services, And Assistance
— R1282A Return to Keysight Calibration Plan The analyzer is delivered with a one-year calibration certificate. Options are available to have Keysight Technologies provide three or five year calibration coverage (perform the annual calibration two or four times). Options for basic calibration or SO/IEC 17025 or ANSI/NCSL Z540.3–2006 standards compliant calibrations are available.
Page 30: Shipping Your Analyzer To Keysight For Service Or Repair
Keysight for repair If you wish to send your network analyzer to Keysight Technologies for service or repair: — Include a complete description of the service requested or of the failure and a description of any failed test and any error message.
Page 31: Tests And Adjustments
Keysight Microwave Network Analyzers 2-Port and 4-Port PNA-X Service Guide Tests and Adjustments Information in This Chapter This chapter contains procedures to help you check, verify, and adjust your PNA. — The checks verify the operation of the assemblies in your analyzer. —...
Page 32 Performing the operator’s check. page 3-12 Checking your test cables. Perform these checks before performing system verification. System Verification What the system verification does. page 3-22 How to perform the verification test. How to interpret the results. Keysight N5247B Service Guide...
Page 33 Noise Figure Adjustment (Available with Option 029 with S93029A/B Installed) a. These performance tests are included in the analyzer’s firmware for Options S93898A. b. These adjustments are included in the analyzer’s firmware on all models and options. Keysight N5247B Service Guide...
Page 34: Before You Begin
To reduce the chance of electrostatic discharge, follow all of the recommendations outlined in “Electrostatic Discharge Protection” on page 1-7, for all of the procedures in this chapter. Keysight N5247B Service Guide...
Page 35: Allow The Analyzer To Warm Up
Get liquid into plastic support beads — Use isopropyl alcohol — Clean connector threads Gaging Connectors — Clean and zero the gage before use Do Not — Use an out-of-specification connector — Use the correct gage type Keysight N5247B Service Guide...
Page 36 Cleaning connectors with alcohol shall only be done with the instrument’s power cord removed, and in a well-ventilated area. Allow all residual alcohol moisture to evaporate, and the fumes to dissipate prior to energizing the instrument. Keysight N5247B Service Guide...
Page 37: About System Verification And Performance Tests
System specifications are applicable only when the measurement system is used to make error-corrected measurements. The analyzer's system specifications are described in the “N5247B Data Sheet and Technical Specifications” in the section titled “Corrected System Performance”, available online at: http://literature.cdn.keysight.com/litweb/pdf/N5247-90002.pdf.
Page 38: Instrument Specifications
Tests and Adjustments About System Verification and Performance Tests Instrument Specifications The analyzer's instrument specifications are described in the “N5247B Data Sheet and Technical Specifications” in the section titled “Corrected System Performance”, available online at: http://literature.cdn.keysight.com/litweb/pdf/N5247-90002.pdf. These specifications apply when the analyzer is used to make either raw or error-corrected measurements.
Page 39: Certificate Of Calibration
About System Verification and Performance Tests Certificate of Calibration Keysight Technologies will issue a certificate of calibration upon successful completion of system verification or completion of the performance tests. The certificate of calibration will apply to the “system” (analyzer, calibration kit, test cables, and any necessary adapters) if the system verification procedure is used to confirm the system specifications.
Page 40: Ansi/Ncsl Z540.3-2006 And Iso/Iec 17025 Verification
After the failure has been corrected, repeat the entire set of performance tests and generate a new set of data. Figure 3-1 ANSI/NCSL Z540.3–2006 and ISO/IEC 17025 Verification Flowchart 1. Stop only in case of a catastrophic failure or cable connector damage 3-10 Keysight N5247B Service Guide...
Page 41: Non-Standards Compliant Verification
Troubleshoot and repair the first problem encountered without continuing to other tests. After you troubleshoot, repair, and adjust, repeat the last failed portion and generate a new set of data. Figure 3-2 Non–Standards Compliant Verification Flowchart Keysight N5247B Service Guide 3-11...
Page 42: Preliminary Checks
Shorts/Opens are attached to ALL ports, to run through the test without stopping. Shorts and opens can be mixed on the test ports. 3. Click Begin. 3-12 Keysight N5247B Service Guide...
Page 43 Figure 3-3). The PNA Operator’s Check dialog box will look different for different PNA model numbers and installed options. Some of the tests are performed only if the appropriate options are installed in the PNA. Keysight N5247B Service Guide 3-13...
Page 44 Tests and Adjustments Preliminary Checks Figure 3-3 Operator’s Check Dialog Boxes 3-14 Keysight N5247B Service Guide...
Page 45: The Test Port Cable Checks
7. The marker annotation on the screen indicates the worst case return loss. Refer to the cable manual to see if it meets the return loss specification. For an example of a typical return loss measurement, see Figure 3-4. Keysight N5247B Service Guide 3-15...
Page 46 CalSet_1.cst. 6. Connect the test port cable to the PNA Port 1 and perform a 1-port calibration again at the end of the cable. After calibration, save the cal set data as CalSet_2.cst. 3-16 Keysight N5247B Service Guide...
Page 47 Help section “Save and Recall a File” if necessary. 10.Refer to the cable manual to see if it meets the insertion loss specification. For an example of a typical insertion loss measurement, see Figure 3-6. Keysight N5247B Service Guide 3-17...
Page 48 ON. Average on/OFF The Averaging Factor box will appear directly above the display. In the Averaging Factor box, type 50 or click the arrows to select 50, and then press ENTRY Enter 3-18 Keysight N5247B Service Guide...
Page 49 Therefore, the measured deflection value must be divided in half to reach the correct value. Figure 3-7 Typical Cable Magnitude and Phase Stability Response Keysight N5247B Service Guide 3-19...
Page 50 7. Disconnect and then reconnect the cable to the test port. Tighten the connection to the specified torque for the connector type. 8. Press RESPONSE , then Averaging Restart 9. Look at the trace for spikes or modes. 3-20 Keysight N5247B Service Guide...
Page 51 Typical Cable Connector Repeatability Response If the Cable Connector Repeatability 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. Keysight N5247B Service Guide 3-21...
Page 52: System Verification
Measurement Uncertainty Measurement uncertainty is defined as the sum of: — the residual systematic (repeatable) errors, and — the random (non-repeatable) errors in the measurement system after calibration. The systematic errors are: 3-22 Keysight N5247B Service Guide...
Page 53: Measurement Traceability
National Institute of Standards and Technology (NIST) (see Figure 3-9). This chain of measurements defines how the verification process brings traceability to the network analyzer system. Keysight N5247B Service Guide 3-23...
Page 54: Performing System Verification
If you select to perform a calibration, you are guided through the calibration procedure. This part of the process can be eliminated if you 3-24 Keysight N5247B Service Guide...
Page 55 Refer to the plots in the cable tests (earlier in this chapter) that show the performance of good cables. It is highly recommended that the test port cables be regularly tested. Keysight N5247B Service Guide 3-25...
Page 56 (ECal) that is being used by clicking on it. The corresponding verification kit to use is selected for you and displayed in the Verification Kit box. Refer to Figure 3-10. 5. Under Printer Output, click one of the following options. Refer to Figure 3-10. 3-26 Keysight N5247B Service Guide...
Page 57 This will invalidate the calibration that you performed earlier. 1. Disconnect and clean the device that failed the verification test. 2. Reconnect the device making sure that all connections are torqued to the proper specifications. 3. Measure the device again. Keysight N5247B Service Guide 3-27...
Page 58 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. 3-28 Keysight N5247B Service Guide...
Page 59 Tests and Adjustments System Verification Each S-parameter measurement result is printed with frequency tested, lower and upper limit lines, the measured data, and the result of the test. Figure 3-12 Example of Printed Tabular Verification Results Keysight N5247B Service Guide 3-29...
Page 60 — Data measured at the factory from the verification kit. Labeled as B in Figure 3-13. — Upper and lower limit points as defined by the total system uncertainty system. Labeled as C in Figure 3-13. 3-30 Keysight N5247B Service Guide...
Page 61 Tests and Adjustments System Verification Figure 3-13 Example of Printed Graphical Verification Results Keysight N5247B Service Guide 3-31...
Page 62: Performance Tests
Function of the Test: To confirm the accuracy of the source output power of your network analyzer over its full frequency range. Specification Tested: Test Port Output–Power Level Accuracy Equipment Used: — Power meter — Power sensors — Any necessary adapters 3-32 Keysight N5247B Service Guide...
Page 63: Source Maximum Power Output Test
3. A power sensor is connected to the test port, using any necessary adapters. 4. The analyzer frequency is set to the desired value. 5. The power meter correction table is set to the same frequency. Keysight N5247B Service Guide 3-33...
Page 64: Source Power Linearity Test
6. The non-linearity in dB at each frequency point is calculated as the difference between the change in the source power setting away from Preset and the change in the receiver power reading. 3-34 Keysight N5247B Service Guide...
Page 65: Frequency Accuracy Test
— Verify the accuracy of the 10 MHz OCXO by using a frequency counter to measure the rear-panel 10 MHz REF OUT. If the 10 MHz reference is off by more than 10 Hz, perform the “10 MHz Frequency Reference Adjustment” on page 3-55 and then repeat this test. Keysight N5247B Service Guide 3-35...
Page 66: Trace Noise Test
— If the analyzer still fails this test, replace the mixer module for the failing receiver, and then repeat this test. Receiver Compression Test Function of the Test: To measure the compression at the analyzer’s specified maximum power level for the receivers. 3-36 Keysight N5247B Service Guide...
Page 67 10.The second test set output attenuator is set to 20 dB. 11.The magnitude and phase measurements using the receiver under test are read: (Pc). 12.The first test set output attenuator is set to 0 dB. Keysight N5247B Service Guide 3-37...
Page 68: Noise Floor Test
Preset power level. 6. The power sensor is disconnected and the cable is connected to the port to be tested. 3-38 Keysight N5247B Service Guide...
Page 69: Calibration Coefficients Test
3. The test cable is moved to Port 2. 4. A calibration is performed between the end of the test cable and Port 1. The Port 1directivity and source match and the S12 load match are retrieved from the analyzer. Keysight N5247B Service Guide 3-39...
Page 70: Dynamic Accuracy Test - Version 1
A2, to the receiver port. 3. With the amplifier active and A1, set to 0 dB, the analyzer source power is adjusted to achieve exactly 0.0 dBm at the power sensor. This is the power meter reference reading, Pmr. 3-40 Keysight N5247B Service Guide...
Page 71 Dynamic Accuracy Test – Version 2 This description applies to all N522xB, N5231B/32B/34B/35B/39B, and N5247B instruments. It also applies to N5241B/42B/44B/45B instruments with serial numbers greater than xx5240xxxx. It also applies to N5241B/42B/44B/45B instruments with serial numbers less than xx5240xxxx.
Page 72 “Removing and Replacing the A27 and A28 Mixer Bricks” on page 7-41. — If the analyzer still fails this test, replace the A12 SPAM board and repeat this test. Refer to “Removing and Replacing the A4–A17 Boards” on page 7-18. 3-42 Keysight N5247B Service Guide...
Page 73: Dynamic Accuracy At Low Frequency (Available With Lfe Option 205/220/420/425)
Setups for some option configurations may not appear in the Help. — For the two cables between the power splitter and attenuators, choose short but flexible cables. 1. Your model PNA may not have available all of the LFE Options listed. Keysight N5247B Service Guide 3-43...
Page 74 “Removing and Replacing the A27 and A28 Mixer Bricks” on page 7-41. — If the analyzer still fails this test, replace the A12 SPAM board and repeat this test. Refer to “Removing and Replacing the A4–A17 Boards” on page 7-18. 3-44 Keysight N5247B Service Guide...
Page 75: Dc Continuity Test The Lfe Board And Test Ports (Available With Lfe Option 205/220/420/425)
800 kHz noise IF bandwidth using hundreds of points across the full frequency range of the noise receiver. 4. The ENR data file for the noise source is read into the analyzer. 1. Your model PNA may not have available all of the LFE Options listed. Keysight N5247B Service Guide 3-45...
Page 76: Noise State Calibration Coefficients
2. The analyzer is set to make a noise power density measurement with the noise gain set to 0 dB and the noise bandwidth set to 4 MHz. The analyzer is set up for a 201 point CW transmission measurement using the noise receiver. 3-46 Keysight N5247B Service Guide...
Page 77: Noise Receiver Linearity Test
1. The signal generator is connected to the dynamic accuracy test set’s source port and the dynamic accuracy test set’s receiver port is connected to the PNA-X Port 2. A power sensor is connected to the dynamic accuracy test set’s power meter port. Keysight N5247B Service Guide 3-47...
Page 78: Noise Receiver Compression Test
Noise Receiver Compression Test Function of the Test: To measure the PNA-X noise receiver compression at the receiver’s specified maximum input power level. Specification Tested: Test Port Input: Option 029 – Noise Receiver Input Range 3-48 Keysight N5247B Service Guide...
Page 79 B receiver. 11.The source power calibration for the appropriate gain stage is applied and a sweep is made. 12.The source attenuator is set for an additional 10 dB and another sweep is made. Keysight N5247B Service Guide 3-49...
Page 80 — Check for proper torquing of all semi-rigid cables in the receiver chain, and then repeat this test. — If the analyzer still fails this test, replace the A7 Noise Receiver board and repeat this test. Refer to “Removing and Replacing the A4–A17 Boards” on page 7-18. 3-50 Keysight N5247B Service Guide...
Page 81 — If the test procedure applies to multiple ports, illustrations will show the setup on only one test port. Setups for some option configurations may not appear in the Help. — For the two cables between the power splitter and attenuators, choose short but flexible cables. Keysight N5247B Service Guide 3-51...
Page 82 “Removing and Replacing the A27 and A28 Mixer Bricks” on page 7-41. — If the analyzer still fails this test, replace the A12 SPAM board and repeat this test. Refer to “Removing and Replacing the A4–A17 Boards” on page 7-18. 3-52 Keysight N5247B Service Guide...
Page 83: Dc Continuity Test The Lfe Board And Test Ports (Available With Low Frequency Extension (Lfe) Installed Option 205/425)
Cables, All Options, Serial Number Prefixes <6021” on page 6-18 and the blue RF flexible cables installed in Chapter 6 in the “Bottom Assemblies” section—for your LFE option—are connected correctly and not open or shorted. Keysight N5247B Service Guide 3-53...
Page 84: Adjustments
Setting window and re-calibrate the touch settings using the below. Step 1. Verify your instrument is powered up. Step 2. Press Instrument > Display > Display Setup > Calibrate Touchscreen... Step 3. In the Table PC Setting window that opens, press Calibrate... 3-54 Keysight N5247B Service Guide...
Page 85: 10 Mhz Frequency Reference Adjustment
Any that will measure a signal at 10 MHz. Procedure This adjustment typically adjusts to within ±0.01 ppm. 1. Connect the equipment as shown in Figure 3-16. Connect a GPIB cable between the network analyzer and the frequency counter. Keysight N5247B Service Guide 3-55...
Page 86: Synthesizer Bandwidth Adjustment
The source calibration is used to adjust your network analyzer for a flat source power across its full frequency range. There are differences between each test port; therefore, an adjustment is required for each port. 3-56 Keysight N5247B Service Guide...
Page 87 Figure 3-17 Equipment Setup for the Source Adjustment Service Adjustment Routines 2. .Press UTILITY , then , then , then System click Source Adjustment. 3. Ensure the GPIB settings are correct. Keysight N5247B Service Guide 3-57...
Page 88: If Gain Adjustment
Therefore, they should be backed up (saved on a floppy disk) so that they can be restored. If using multiple disk drives (e.g. classified and general usage), then these files must be replaced on each individual disk drive. These files can be recreated by performing another receiver calibration adjustment. 3-58 Keysight N5247B Service Guide...
Page 89 1.85 mm and 2.4 mm adapters are interchangeable. Procedure 1. Connect the equipment as shown in Figure 3-18. Connect a GPIB cable between the network analyzer and the power meter. Figure 3-18 Equipment Setup 1 for the Receiver Adjustment Keysight N5247B Service Guide 3-59...
Page 90: Ee Default Adjustment
4. Follow the instructions and prompts as they are displayed. Figure 3-19 Equipment Setup 2 for the Receiver Adjustment Figure 3-20 Equipment Setup 3 for the Receiver Adjustment EE Default Adjustment This sets the EEPROM data to their default values. 3-60 Keysight N5247B Service Guide...
Page 91: If Response Adjustment (Available Only With Option S93093/4A/B And Or S93900/1/2/4/5/7A/B Installed)
System , then , then , then click LFE Receiver Adjustment. 2. Follow the instructions and prompts as they are displayed. 1. Your model PNA may not have available all of the LFE Options listed. Keysight N5247B Service Guide 3-61...
Page 92: Noise Figure Adjustment (Available With Option 029 With S93029A/B Installed)
50 GHz. Procedure Service Adjustment Routines 1. Press UTILITY System , then , then , then click Noise Adjustment. 2. On the PNA Noise Adjustment dialog box (see Figure 3-21): 3-62 Keysight N5247B Service Guide...
Page 93 Skip Zero and Cal before first use. Figure 3-21 PNA Noise Adjustment Dialog Box 3. Click Begin. 4. As shown in Figure 3-22, connect an RF cable between the network analyzer test ports 1 and 2. Keysight N5247B Service Guide 3-63...
Page 94 6. When prompted, disconnect the sensor from the cable, and insert the ECal module between port 2 and the free end of the cable. Connect the ECal module directly to port 2 without using any adapters if possible. See Figure 3-24. 3-64 Keysight N5247B Service Guide...
Page 95 Tests and Adjustments Adjustments Figure 3-24 Equipment Setup 3 for the Receiver Adjustment The entire procedure takes about 30 to 45 minutes. Keysight N5247B Service Guide 3-65...
Page 96 Tests and Adjustments Adjustments 3-66 Keysight N5247B Service Guide...
Page 97: Troubleshooting
Keysight Microwave Network Analyzers 2-Port and 4-Port PNA-X Service Guide Troubleshooting Information in This Chapter The information in this chapter helps you: — Identify the portion of the analyzer at fault. — Locate the specific troubleshooting procedure to identify the assembly or peripheral at fault.
Page 98: Chapter Four At-A-Glance
Problems with the measurement portion of the analyzer. page 4-29 Troubleshooting — Checking the A, B, R1, and R2 signals. — Checking the source group. — Checking the signal separation group. — Checking the receiver group. Keysight N5247B Service Guide...
Page 99: Conventions Used For Hardkeys, Softkeys, And Menu Items
This represents a “tab”, whose label is determined by the instrument firmware. This represents a “softkey”, a key whose label is determined by the instrument firmware. Softkey Menu Item This represents an item in a drop-down or pop-up menu. Keysight N5247B Service Guide...
Page 100: Operating The Analyzer With Covers Removed
Step 2. Replace the faulty assembly and determine what adjustments are necessary. Refer to Chapter 7, “Repair and Replacement Procedures.” Step 3. Perform the necessary adjustments. Refer to Chapter 3, “Tests and Adjustments.” Step 4. Perform the necessary performance tests. Refer to Chapter 3, “Tests and Adjustments.” Keysight N5247B Service Guide...
Page 101: Getting Started With Troubleshooting
Check the Basics A problem can often be solved by repeating the procedure you were following when the problem occurred. Before calling Keysight Technologies or returning the instrument for service, please perform the following checks: 1. Is there power at the mains receptacle? If not, correct this situation and proceed.
Page 102 Troubleshooting Getting Started with Troubleshooting Figure 4-1 Troubleshooting Organization Flowchart Go to “Power Up Troubleshooting” Go to “Front Panel Troubleshooting” Go to “Rear Panel Troubleshooting” Go to “Measurement System Troubleshooting” Keysight N5247B Service Guide...
Page 103: Power Up Troubleshooting
“Troubleshooting LCD Display Problems” on page 4-13. — If the instrument appears to abort the network analyzer measurement interface process, contact Keysight. Refer to “Contacting Keysight” on page 2-7. Keysight N5247B Service Guide...
Page 104: Power Supply Check
ACOM as ground reference for analog supplies and the point marked DCOM as ground reference for digital supplies. Refer to Figure 4-2 for the power supply measurement points on the A19 midplane board. Refer to Table 4-1 on page 4-10 for the correct voltages. Keysight N5247B Service Guide...
Page 105 A20 power supply provides voltage. To isolate the cause, continue to the assembly removal process as described in the section titled “If Any Supply Voltage Is Missing” on page 4-10. Keysight N5247B Service Guide...
Page 106 Motherboard” on page 7-32). 2. Unplug the A23 test set motherboard to A24 IF multiplexer board ribbon cable from the A24 IF multiplexer board (refer to “Removing and Replacing the A24 IF Multiplexer Board” on page 7-34). 4-10 Keysight N5247B Service Guide...
Page 107 You should be able to determine if the shorted condition has changed. Isolate the remaining three assemblies: Keysight N5247B Service Guide 4-11...
Page 108 A18 system motherboard. THIS MUST BE DONE QUICKLY AS THE ANALYZER WILL RAPIDLY OVERHEAT WITHOUT THE COOLING EFFECT OF THE FANS. DO NOT PLUG IN THE POWER CORD UNTIL READY TO PERFORM MEASUREMENTS. 4-12 Keysight N5247B Service Guide...
Page 109: Troubleshooting Lcd Display Problems
There are no front panel adjustments for intensity and contrast of the LCD. 1. If the display is dim, the A3 display assembly is defective. Refer to “Removing and Replacing the A1–A3 and Other Front Panel Subassemblies” on page 7-10. Keysight N5247B Service Guide 4-13...
Page 110 4. If the front panel interface ribbon cable is properly connected, suspect that one or more of the following is defective: — inverter board (mounted on the display assembly) — A1 front panel interface board — A3 display assembly 4-14 Keysight N5247B Service Guide...
Page 111: Front Panel Troubleshooting
Service Diagnostics Press UTILITY , then , then , then System Front Panel Test A Front Panel Key Test Utility dialog box will be displayed, as shown in Figure 4-4. Keysight N5247B Service Guide 4-15...
Page 112 7-11. To replace the A1 front panel interface board, refer to “Removing the A1 Front Panel Interface Board and Keypad Assembly” on page 7-10. — To close the Key Label window and return to the instrument display, press Preset three times. 4-16 Keysight N5247B Service Guide...
Page 113 Scale Save/Recall ← Math → Macro Avg BW Undo ↓ System Help Marker Search Preset a. There are no Entry or Navigation labels on the display. Entry and Navigation titles are for functional reference only. Keysight N5247B Service Guide 4-17...
Page 114: A3 Display Test
If the display is dark, refer to “Removing the A3 Display Assembly and the Touchscreen” on page 7-12 and to “Removing the Touchscreen Controller Board” on page 7-11. 4-18 Keysight N5247B Service Guide...
Page 115: Checking The A2 Usb Board
USB device. 3. If the device performs correctly, the USB board is functioning properly. Else, skip to step 5. 4. Repeat steps thru for all front and rear USB ports. Keysight N5247B Service Guide 4-19...
Page 116: A1 Front Panel Interface Board
A1 Front Panel Interface Board and Keypad Assembly” on page 7-10 and to “Removing the Speaker Assembly” on page 7-12. Checking the Operation of the Key Pad Commands To verify the key pad functionality, refer to “Front Panel Keypad and RPG Test” on page 4-15. 4-20 Keysight N5247B Service Guide...
Page 117 Troubleshooting Front Panel Troubleshooting Checking the Display To verify the display functionality, refer to “A3 Display Test” on page 4-18. Keysight N5247B Service Guide 4-21...
Page 118: Rear Panel Troubleshooting
Configure , then SICL/GPIB... System SICL/GPIB/SCPI dialog box is displayed. 3. In the GPIB block, click System Controller to establish the analyzer as a controller. Wait for the analyzer to configure, and then click OK. 4-22 Keysight N5247B Service Guide...
Page 119: Lan Troubleshooting
Problems with the Local Area Network (LAN) can be difficult to solve. Software and protocol problems can make it difficult to determine whether the analyzer's hardware is working properly, or if there is a problem with the LAN or cabling. Keysight N5247B Service Guide 4-23...
Page 120 Windows Taskbar menu at the bottom of the display. b. On the Windows Taskbar menu, click Start, point to Programs, Accessories, and then click Command Prompt. c. The command prompt window is displayed. 4-24 Keysight N5247B Service Guide...
Page 121 Other software may behave somewhat differently, but basically the same. 1. The letters x represent the IP address of the other device on the network. 2. The letters x represent the IP address of the analyzer. Keysight N5247B Service Guide 4-25...
Page 122 A crossover cable can be made from a standard LAN cable by connecting pin 1 from each connector to pin 3 of the other connector, and pin 2 from each connector to pin 6 of the other connector. 4-26 Keysight N5247B Service Guide...
Page 123 2 on the other end of the cable. 3. Insulate all exposed wires so that they cannot short together. 4. Label this as a crossover cable so that it cannot be confused with a standard cable. Keysight N5247B Service Guide 4-27...
Page 124 Troubleshooting Rear Panel Troubleshooting Figure 4-6 Construction of a Crossover Cable 4-28 Keysight N5247B Service Guide...
Page 125: Measurement System Troubleshooting
, then Help About NA..Verify that the information displayed in this screen is correct for your analyzer. If any of the information is incorrect, contact Keysight Technologies. Refer to “Contacting Keysight” on page 2-7. Keysight N5247B Service Guide 4-29...
Page 126: Verifying The A, B, C, D, And R Traces (Standard S-Parameter Mode)
A23 test set motherboard. 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: 4-30 Keysight N5247B Service Guide...
Page 127 — For 4-port analyzer models, traces A, B, C, D, and R1, R2, R3, and R4 are displayed in eight separate data windows as shown in Figure 4-9. Identifying discrepancies of the traces in these windows can help you to isolate the faulty assembly. Keysight N5247B Service Guide 4-31...
Page 128: Where To Begin Troubleshooting
Proceed to “Where to Begin Troubleshooting.” Where to Begin Troubleshooting For the purposes of troubleshooting, the analyzer block diagram is divided into the following functional groups: — the source and LO group 4-32 Keysight N5247B Service Guide...
Page 129 A26 splitter. Some PNAs have installed a new HMA26.5 (N5240-60101) with an integrated splitter. To identify which HMA26.5 is installed in your PNA, refer to “Verify the Model/Version of HMA26.5 Installed” on page 4-41. Keysight N5247B Service Guide 4-33...
Page 130 Click the Hardware tab, click Device Manager, and then expand Keysight PNA DSP Device in the resulting list. The following entry should be listed: Keysight Technologies DSP Driver #2 and should be enabled. 2. If the entry is not present or if the icon to the left of the name is a...
Page 131: Checking The Source Group
Broadband failures are indicated by all receiver traces being in the noise floor. RF Signal Troubleshooting Check the output power of the A, B, C, and D signals: Equipment Used for This Check Keysight N5247B Service Guide 4-35...
Page 132 — If the power level is low or high on only one of the test ports, the problem is either source group or in the signal separation group. Continue with “Checking the A14 50 MHz Reference Outputs” to check the source group. 4-36 Keysight N5247B Service Guide...
Page 133 1. A14 frequency reference board only applies to instruments with serial number pre- fixes <6021. 2. The A15 direct digital synthesizer assembly only applies to PNAs with serial number that has been prefixes ≥6021 or upgraded with a version 7 synthesizer assembly. Keysight N5247B Service Guide 4-37...
Page 134 Repeat steps 1 through.3. e. If the instrument still has a similar “Slug” failure then the DDS is faulty and needs to be replaced. 5. If the A15 DDS assembly is faulty, contact Keysight Technologies for help. Refer to “Contacting Keysight” on page 2-7.
Page 135 W51 at the A15 LO synthesizer board. 2. Disconnect W51 from J1207. 3. Connect the spectrum analyzer to J1207. 1. A15 13.5 GHz LO Synthesizer board only applies to instruments with serial number prefixes <6021. Keysight N5247B Service Guide 4-39...
Page 136 5. If the observed problem was frequency banded rather than broadband related, set the analyzer frequency to the center of the problem band. The spectrum analyzer should measure a signal above the network analyzer 4-40 Keysight N5247B Service Guide...
Page 137 The new N5240-60101 HMA26.5 has the splitter integrated into the assembly and uses an N5222-20126 cable. Refer to Figure 4-12 on page 4-42. See also Chapter 6, “Replaceable Parts.” and the “Bottom Assemblies and Cables” section for your configuration and serial number prefix. Keysight N5247B Service Guide 4-41...
Page 138 Troubleshooting Measurement System Troubleshooting Figure 4-12 Comparison of Legacy HMA26.5 (5087-7765) and New HMA26.5 (N5240-60101) 4-42 Keysight N5247B Service Guide...
Page 139 2-port models with Option 224.) 2. Disconnect W1 or W2 from J1207. 3. Connect the spectrum analyzer to J1207. 1. A4 and A17 synthesizer boards only applies to PNAs with serial number prefixes <6021. Keysight N5247B Service Guide 4-43...
Page 140 Refer to “Removing and Replacing the A4–A17 Boards” on page 7-18. 7. If the signal is present, reconnect all cables, and then continue with “Checking the A7, A8, A12, and A13 40 GHz Doubler Outputs”. 4-44 Keysight N5247B Service Guide...
Page 141 A61 and A62 are available only in 4-port models and 2-port models with Option 224.) — W27 on the A60 doubler board, — W28 on the A61 doubler board — W29 on the A62 doubler board Keysight N5247B Service Guide 4-45...
Page 142 “Removing and Replacing the A60–A63 70 GHz Doublers” on page 7-62. 7. If the signal is present, reconnect all cables, and then continue with “Checking the Signal through the Signal Separation Path” on page 4-49. 4-46 Keysight N5247B Service Guide...
Page 143: Checking The Signal Separation Group
Use an antistatic work surface and wrist strap to reduce the chance of electrostatic discharge for all of the procedures in this chapter. 1. Turn off the analyzer power. 2. Unplug the power to the analyzer and disconnect all front and rear panel connections except installed jumpers. Keysight N5247B Service Guide 4-47...
Page 144 , then Utilities Receiver Display , then 3. Set the sweep speed for a 10 second sweep: Press STIMULUS Sweep Sweep Time then . Set the time to 10.000 seconds in the Sweep Time box. 4-48 Keysight N5247B Service Guide...
Page 145 224.) — A29, A30, A31, or A32 reference coupler — A38, A39, A40, or A41 source step attenuator — A42, A43, A44, or A45 bias tee — A33, A34, A35, and A36 test port coupler Keysight N5247B Service Guide 4-49...
Page 146 5. If the 800 MHz signal is not present and the analyzer does not have mechanical switches, replace the reference coupler. Refer to “Removing and Replacing the A29 –A32 Reference Couplers and Reference Coupler Mounting Brackets” on page 7-43. 4-50 Keysight N5247B Service Guide...
Page 147 — Port 1; W106 of A50 — Port 2; W120 of A53 — Port 3; W112 of A51 — Port 4; W116 of A52 2. Using a 5/16-inch torque wrench, disconnect the semirigid cable at the bypass switch. Keysight N5247B Service Guide 4-51...
Page 148: Checking The Receiver Group
Use an antistatic work surface and wrist strap to reduce the chance of electrostatic discharge for all of the procedures in this chapter. 1. Turn off the analyzer power. 2. Unplug the power to the analyzer and disconnect all front and rear panel connections except installed jumpers. 4-52 Keysight N5247B Service Guide...
Page 149 4. Refer to the NOTE notice on page 4-29. The measured signal on the spectrum analyzer should be at 7.61 MHz (analyzers with DSP version 4.0), or 7.44 MHz (analyzers with DSP version 5.0), and 1 GHz. Keysight N5247B Service Guide 4-53...
Page 150 A46–A49 Receiver Attenuators” on page 7-51. 5. If the 800 MHz signal is present, replace the associated mixer brick, A27 or A28. Refer to “Removing and Replacing the A27 and A28 Mixer Bricks” on page 7-41. 4-54 Keysight N5247B Service Guide...
Page 151 “Removing and Replacing the A4–A17 Boards” on page 7-18. 6. If the measured signal is not present, replace the A24 IF multiplexer board. Refer to “Removing and Replacing the A24 IF Multiplexer Board” on page 7-34. Keysight N5247B Service Guide 4-55...
Page 152: Instrument Simplified Block Diagrams - Lfe
2-Port N5290A System Block Diagram (201 and 205) Figure 4-14 System Block Diagram Legend Figure 4-15 2-Port N5290A System Simplified Block Diagram (201 and 205) 1. Your model PNA may not have available all of the LFE Options listed. 4-56 Keysight N5247B Service Guide...
Page 153: 2-Port N5290A System Block Diagram (202 And 205)
Troubleshooting Instrument Simplified Block Diagrams – LFE 2-Port N5290A System Block Diagram (202 and 205) Figure 4-16 2-Port N5290A System Simplified Block Diagram (202 and 205) Keysight N5247B Service Guide 4-57...
Page 154: 4-Port N5290A System Block Diagram (401)
Troubleshooting Instrument Simplified Block Diagrams – LFE 4-Port N5290A System Block Diagram (401) Figure 4-17 4-Port N5290A System Simplified Block Diagram (401) 4-58 Keysight N5247B Service Guide...
Page 155 Troubleshooting Instrument Simplified Block Diagrams – LFE Figure 4-18 4-Port N5290A System Simplified Block Diagram (402) Keysight N5247B Service Guide 4-59...
Page 156 Troubleshooting Instrument Simplified Block Diagrams – LFE Figure 4-19 4-Port N5290A System Simplified Block Diagram (403) 4-60 Keysight N5247B Service Guide...
Page 157 Troubleshooting This page left intentionally blank. Keysight N5247B Service Guide 4-61...
Page 158: Instrument Block Diagrams - 2-Port (Sheet 1), Non-Lfe And Non-Dds
Instrument Block Diagrams – 2-Port (Sheet 1), Non-LFE and Non-DDS (Version 6 Synthesizers) Instrument Block Diagrams – 2-Port (Sheet 1), Non-LFE and Non-DDS (Version 6 Synthesizers) Microwave PNA-X, N5247B – 2-Port, Non-LFE and Non-DDS (Version 6 Synthesizers) 4-62 Keysight N5247B Service Guide...
Page 159 REAR PANEL N5247B 2-Port Overall Block Diagram FRONT PANEL FRONT PANEL INTERCONNECTS INTERCONNECTS INTERCONNECTS Including Options 201-Standard, 219-Attenuators and Bias Tees A24 IF MULTIPLEXER A27 MIXER BRICK (1) 224-Attenuators, Bias Tees, Combiner and Source Bypass Switches IF = 0.826 MHz for CW Freq < 53 MHz IF = 7.438 MHz for CW Freq >...
Page 160: Instrument Block Diagrams - 2-Port (Sheet 2), Non-Lfe And Dds
Instrument Block Diagrams – 2-Port (Sheet 2), Non-LFE and DDS (Version 7 Synthesizer Assemblies) Instrument Block Diagrams – 2-Port (Sheet 2), Non-LFE and DDS (Version 7 Synthesizer Assemblies) Microwave PNA-X, N5247B – 2-Port, Non-LFE and DDS (Version 7 Synthesizer Assemblies) 4-64 Keysight N5247B Service Guide...
Page 161 REAR PANEL N5247B 2-Port Overall Block Diagram FRONT PANEL INTERCONNECTS FRONT PANEL INTERCONNECTS INTERCONNECTS Including Options 201-Standard, 219-Attenuators and Bias Tees A24 IF MULTIPLEXER A27 MIXER BRICK (1) 224-Attenuators, Bias Tees, Combiner and Source Bypass Switches IF = 0.826 MHz for CW Freq < 53 MHz IF = 7.438 MHz for CW Freq >...
Page 162: Instrument Block Diagrams - 4-Port (Sheet 3), Non-Lfe And Non-Dds (Version 6
Instrument Block Diagrams – 4-Port (Sheet 3), Non-LFE and Non-DDS (Version 6 Synthesizers) Instrument Block Diagrams – 4-Port (Sheet 3), Non-LFE and Non-DDS (Version 6 Synthesizers) Microwave PNA-X, N5247B – 4-Port, Non-LFE and Non-DDS (Version 6 Synthesizers) 4-66 Keysight N5247B Service Guide...
Page 163 REAR PANEL N5247B 4-Port Overall Block Diagram FRONT PANEL FRONT PANEL INTERCONNECTS INTERCONNECTS INTERCONNECTS Including Options 401-Standard; 419-Attenuators and Bias Tees; A24 IF MULTIPLEXER A27 MIXER BRICK (1) 423-Attenuators, Bias Tees, Combiner and Source Bypass Switches IF = 0.826 MHz for CW Freq < 53 MHz IF = 7.438 MHz for CW Freq >...
Page 164: Microwave Pna-X, N5247B - 4-Port, Lfe And Non-Dds (Version 6 Synthesizers)
Instrument Block Diagrams – 4-Port (Sheet 4), LFE and Non-DDS (Version 6 Synthesizers) Instrument Block Diagrams – 4-Port (Sheet 4), LFE and Non-DDS (Version 6 Synthesizers) Microwave PNA-X, N5247B – 4-Port, LFE and Non-DDS (Version 6 Synthesizers) 4-68 Keysight N5247B Service Guide...
Page 165 REAR PANEL N5247B 4-Port Overall Block Diagram FRONT PANEL FRONT PANEL INTERCONNECTS INTERCONNECTS INTERCONNECTS Including Options 425-LFE, Attenuators, Bias Tees, A24 IF MULTIPLEXER A27 MIXER BRICK (1) Combiner and Source Bypass Switches IF = 0.826 MHz for CW Freq < 53 MHz A46 STEP IF = 7.438 MHz for CW Freq >...
Page 166: Instrument Block Diagrams - 4-Port (Sheet 5), Non-Lfe And Dds
Instrument Block Diagrams – 4-Port (Sheet 5), Non-LFE and DDS (Version 7 Synthesizer Assemblies) Instrument Block Diagrams – 4-Port (Sheet 5), Non-LFE and DDS (Version 7 Synthesizer Assemblies) Microwave PNA-X, N5247B – 4-Port, Non-LFE and DDS (Version 7 Synthesizer Assemblies) 4-70 Keysight N5247B Service Guide...
Page 167 REAR PANEL N5247B 4-Port Overall Block Diagram FRONT PANEL INTERCONNECTS FRONT PANEL INTERCONNECTS INTERCONNECTS Including Options 401-Standard; 419-Attenuators and Bias Tees; A24 IF MULTIPLEXER A27 MIXER BRICK (1) 423-Attenuators, Bias Tees, Combiner and Source Bypass Switches IF = 0.826 MHz for CW Freq < 53 MHz IF = 7.438 MHz for CW Freq >...
Page 168: Assemblies)
Instrument Block Diagrams – 4-Port (Sheet 6), LFE and DDS (Version 7 Synthesizer Assemblies) Instrument Block Diagrams – 4-Port (Sheet 6), LFE and DDS (Version 7 Synthesizer Assemblies) Microwave PNA-X, N5247B – 4-Port, LFE and DDS (Version 7 Synthesizer Assemblies) 4-72 Keysight N5247B Service Guide...
Page 169 REAR PANEL N5247B 4-Port Overall Block Diagram FRONT PANEL INTERCONNECTS FRONT PANEL INTERCONNECTS INTERCONNECTS Including Options 425-LFE, Attenuators, Bias Tees, A24 IF MULTIPLEXER A27 MIXER BRICK (1) Combiner and Source Bypass Switches IF = 0.826 MHz for CW Freq < 53 MHz A46 STEP IF = 7.438 MHz for CW Freq >...
Page 170 Troubleshooting Instrument Block Diagrams – 4-Port (Sheet 6), LFE and DDS (Version 7 Synthesizer Assemblies) 4-74 Keysight N5247B Service Guide...
Page 171: Theory Of Operation
Keysight Microwave Network Analyzers 2-Port and 4-Port PNA-X Service Guide Theory of Operation Information in This Chapter This chapter provides a general description of the operating theory of the N524xA 2-port and 4-port PNA microwave network analyzers. — Theory of operation is explained to the assembly level only. —...
Page 172 5-59 Control Group Operation processing and digital control. Power Supply Group Operation Operation of the power supply assembly group. page 5-64 Noise Measurement Group Operation of the noise measurement group. page 5-65 Operation (Option 029) Keysight N5247B Service Guide...
Page 173: Network Analyzer System Operation
SRC 2 OUT 1 and SRC 2 OUT 2. Figure 5-1 is a simplified block diagram of the 4-port network analyzer system Figure 5-2 is a simplified block diagram of the 2-port network analyzer system. Figure 5-1 4-Port System Simplified Block Diagram Keysight N5247B Service Guide...
Page 174 Theory of Operation Network Analyzer System Operation Figure 5-2 2-Port System Simplified Block Diagram Figure 5-3 System Block Diagram Legend – LFE Block Diagrams Keysight N5247B Service Guide...
Page 175 Theory of Operation Network Analyzer System Operation Figure 5-4 4-Port N5290A System Simplified Block Diagram (401) – with LFE Keysight N5247B Service Guide...
Page 176: Functional Groups Of The Network Analyzer
The major functional groups are: — Synthesized Source Group — Signal Separation Group — Receiver Group — Digital Processor and Digital Control Group — Power Supply Group Keysight N5247B Service Guide...
Page 177 The built-in direct digital synthesized (DDS) source assembly generates a swept, stepped, or continuous wave (CW) signal in the frequency ranges as listed in the “N5247B– (900 Hz) 10 MHz to 67 GHz Data Sheet and Technical Specifications”, available online at: https://www.keysight.com/us/en/assets/9018-04526/data-sheets/9018-04...
Page 178 (ALC) circuit. For version 6 synthesizers, the maximum output power level of the network analyzer at the test ports is shown in the “N5247B– (900 Hz) 10 MHz to 67 GHz -with synthesizer revision 6 or earlier”, available online at: https://www.keysight.com/upload/cmc_upload/All/N5247B_Synth6.pdf...
Page 179 “Digital Processing and Digital Control Group Operation” on page 5-59. Power Supply Group The power supply functional group provides power for the other assemblies in the instrument. Refer to “Power Supply Group Operation” on page 5-64. Keysight N5247B Service Guide...
Page 180: Synthesized Source Group Operation
A25 Multiplier/Amplifier 26.5 Board (HMA26.5) 1. Version 6 synthesizers: For PNA-X frequency ranges and maximum output power levels, refer to the section “Test Port Output” in the “Data Sheet for N5247B with synthesizer revision 6 or earlier.” See the hyperlink above.
Page 181: Basic Operation
DSP version 4.0, the IF signal is 7.606 MHz (or 2.535 MHz). For analyzers with DSP version 5.0, the IF signal is 7.438 MHz (or 0.826 MHz). 1. A26 splitter only applies to PNAs with serial number prefix <6021. Keysight N5247B Service Guide 5-11...
Page 182 5.0, the frequency value is 7.438 MHz. Since the A4, A15, and A17 13.5 GHz synthesizer boards each receive their 50 MHz input reference signal from the exact same source, frequency drift error is eliminated. 5-12 Keysight N5247B Service Guide...
Page 183 Theory of Operation Synthesized Source Group Operation Figure 5-6 Source Group, Version 6, Part 1 Keysight N5247B Service Guide 5-13...
Page 184 – For Version 7 synthesizers, the signals into the A12 and A13 50 GHz Doublers are generated on the A15 direct digital synthesizer (DDS) assembly. Not shown in figure above. See also, Figure 5-8 on page 5-20. 5-14 Keysight N5247B Service Guide...
Page 185 0.25761 to 0.25761 to 0.250 to 0.250 to 0.250 to 0.250 to 0.40361 0.40361 0.396 0.396 0.396 0.396 0.40361 to 0.40361 to 0.396 to 0.396 to 0.396 to 0.396 to 0.50761 0.50761 0.500 0.500 0.500 0.500 Keysight N5247B Service Guide 5-15...
Page 186 12.00761 to 12.00761 to 12.000 to 12.000 to 12.000 to 12.000 to 12.80761 12.80761 12.800 12.800 12.800 12.800 12.80761 to 12.80761 to 12.800 to 12.800 to 12.800 to 12.800 to 13.51761 13.51761 13.510 13.510 13.510 13.510 5-16 Keysight N5247B Service Guide...
Page 187 7.7013 to 15.4025 to 11.550 to 11.550 to 23.100 to 46.200 to 8.0013 16.0025 12.000 12.000 24.000 48.000 8.0013 to 16.0025 to 12.000 to 12.000 to 24.000 to 48.000 to 8.3346 16.6692 12.500 12.500 25.000 50.000 Keysight N5247B Service Guide 5-17...
Page 188 10.6679 to 21.3359 to 8.000 to 16.000 to 32.000 to 64.000 to 11.1679 22.3359 8.375 16.750 33.500 67.000 11.1679 to 22.3359 to 8.375 to 16.750 to 33.500 to 67.000 to 11.6679 23.3359 8.750 17.500 35.000 70.000 5-18 Keysight N5247B Service Guide...
Page 189 LO signal is a frequency value higher than the test signal. Since the A15 13.5 GHz DDS assembly receives 10 MHz input reference signal from the exact same source, frequency drift error is eliminated. 1. A26 splitter only applies to PNAs with serial number prefix <6021. Keysight N5247B Service Guide 5-19...
Page 190 Theory of Operation Synthesized Source Group Operation Figure 5-8 Source Group, Version 7, Part 1 (Example of Option 423 with Option 029 and with Option XSB) 5-20 Keysight N5247B Service Guide...
Page 191 0.250 to 0.396 0.250 to 0.396 0.403438 0.396 to 0.500 0.403438 to 0.396 to 0.500 0.396 to 0.500 0.396 to 0.500 0.507438 0.500 to 0.628 0.507438 to 0.500 to 0.628 0.500 to 0.628 0.500 to 0.628 0.635438 Keysight N5247B Service Guide 5-21...
Page 192 15.200 to 8.003719 16.000 16.000 16.000 7.600 to 9.520 8.003719 to 16.000 to 16.000 to 16.000 to 9.523719 19.040 19.040 19.040 9.520 to 9.523719 to 9.520 to 19.040 to 19.040 to 12.000 10.003719 10.000 20.000 20.000 5-22 Keysight N5247B Service Guide...
Page 193 13.510 8.334573 12.500 25.000 50.000 12.000 to 8.334573 to 12.500 to 25.000 to 50.000 to 13.510 8.334573 13.250 26.500 53.000 12.000 to 8.334573 to 13.250 to 26.500 to 53.000 to 13.510 9.007906 13.510 27.020 54.040 Keysight N5247B Service Guide 5-23...
Page 194 60.800 to 10.667906 16.000 32.000 64.000 7.600 to 9.520 10.667906 to 16.000 to 32.000 to 64.000 to 11.134573 16.700 33.400 66.800 7.600 to 9.520 11.134573 to 16.700 to 33.400 to 66.800 to 11.667906 17.500 35.000 70.000 5-24 Keysight N5247B Service Guide...
Page 195: A4, A15, And A17 13.5 Ghz Synthesizer Boards (S/N Prefixes <6021 Only)
7.606 MHz IF signal for each of eight receivers (A–D and R1–R4). Refer to “A27 and A28 Mixer Bricks” on page 5-53 for a more complete description. Keysight N5247B Service Guide 5-25...
Page 196 A27 and A28 mixer bricks where they are mixed with the test signals to produce a 7.606 MHz IF signal for each of eight receivers (A–D and R1–R4). Refer to “A27 and A28 Mixer Bricks” on page 5-53 for a more complete description. 5-26 Keysight N5247B Service Guide...
Page 197: A5 And A10 26.5 Ghz Source Boards
For bands 29–38, the input signals of all four doubler boards are doubled, amplified and filtered, then sent to the doubler board output P6, creating the full synthesized source output frequency range of 10 MHz to 40 GHz. Keysight N5247B Service Guide 5-27...
Page 198: A60, A61, A62, And A63 70 Ghz Doubler Boards
VCO is then divided by ten to produce the 10 MHz EXT REF OUT rear panel signal and also a 10 MHz reference signal for the A16 signal processing 1. A26 splitter only applies to PNAs with serial number prefix <6021. 5-28 Keysight N5247B Service Guide...
Page 199: A23 Test Set Motherboard
Connector settings can be changed using SCPI and COM commands. The settings are not accessible from the front panel. PWR I/O A DB-9 female connector. Pin assignments are listed in Table 5-5 on page 5-32. Keysight N5247B Service Guide 5-29...
Page 200 TTL out, test set select bit 3, tied to 0 V 19–21 AD7–5 TTL I/O, address and latched data 22–23 AD0–1 TTL I/O, address and latched data TTL out, active low data strobe (1 μs min) TTL out, high = read, low = write 5-30 Keysight N5247B Service Guide...
Page 201 TTL out, latched, indicates pass fail (programmable polarity) +5 V +5 Vdc, 100 mA max. Sweep End TTL out, active low (10 ms min) indicates sweep done Pass/Fail Write TTL out, active low pass/fail write strobe (1 ms min) Strobe Keysight N5247B Service Guide 5-31...
Page 202: A70 4-Port And A75 2-Port Low Frequency Extension (Lfe) Board
Power Button Open collector input Active low replicates power button key press. A70 4-Port and A75 2-Port Low Frequency Extension (LFE) Board Provides a 900 Hz to 100 MHz LFE signal for measurements. Refer to www.keysight.com/find/pna. 5-32 Keysight N5247B Service Guide...
Page 203 — LF output J5, Port 4, to be connected to the bias combiner Port 4. — 5 IF outputs J7, J11, J12, J13, J14, to be connected to the IF MUX board: A, B, C, D and R. Keysight N5247B Service Guide 5-33...
Page 204 Theory of Operation Synthesized Source Group Operation Figure 5-9 Block Diagram with Synthesizer Board and LFE Board Synthesizer Bias combiner 5-34 Keysight N5247B Service Guide...
Page 205 Theory of Operation Synthesized Source Group Operation Figure 5-10 2-Port with LFE Synthesizer Bias combiners Figure 5-11 4-Port with LFE Synthesizer Synthesizer Bias combiners Keysight N5247B Service Guide 5-35...
Page 206 Theory of Operation Synthesized Source Group Operation Figure 5-12 2-Port LFE with IF MUX Board Bias combiners Figure 5-13 4-Port LFE with IF MUX Board Bias combiners 5-36 Keysight N5247B Service Guide...
Page 207 0.12207 0.12207 to 2.000 to 4.000 4096 16384 0.12207 to 0.24414 0.24414 0.24414 to 2.000 to 4.000 2048 8192 0.24414 to 0.48828 0.48828 1. Some of the LFE options are not available on all models. Keysight N5247B Service Guide 5-37...
Page 208 2.000 to 4.000 31.25000 to 62.50000 62.50000 62.50000 to 2.000 to 4.000 62.50000 to 1000.0000 125.0000 a. A15 Source synthesizer VCO column only applies to version 6 synthesizers in instruments with a s/n prefix 6021. < 5-38 Keysight N5247B Service Guide...
Page 209 2.000 to DDS_CLK 4.000 2.000 to DDS_CLK 4.000 2.000 to DDS_CLK 4.000 2.000 to DDS_CLK 4.000 2.000 to DDS_CLK 4.000 2.000 to DDS_CLK 4.000 1. Some of the LFE options are not available on all models. Keysight N5247B Service Guide 5-39...
Page 210 1.99000 to DDS_CLK 31.25000 31.5000 to DDS_CLK 53.0000 53.0000 to DDS_CLK 62.50000 62.50000 to DDS_CLK 1000.0000 a. A15 Source synthesizer VCO column only applies to version 6 synthesizers in instruments with a s/n prefix 6021. < 5-40 Keysight N5247B Service Guide...
Page 211 7 synthesizers in instruments with a s/n prefix 6021 or that have ≥ been updated to version 7 synthesizers. 1. Some of the LFE options are not available on all models. Keysight N5247B Service Guide 5-41...
Page 212 2.000 to DDS_CLK 4.000 2.000 to DDS_CLK 4.000 2.000 to DDS_CLK 4.000 2.000 to DDS_CLK 4.000 2.000 to DDS_CLK 4.000 2.000 to DDS_CLK 4.000 1. Some of the LFE options are not available on all models. 5-42 Keysight N5247B Service Guide...
Page 213 1.99000 to DDS_CLK 31.25000 31.5000 to DDS_CLK 53.0000 53.0000 to DDS_CLK 62.50000 62.50000 to DDS_CLK 1000.0000 a. A15 Source synthesizer VCO column only applies to version 6 synthesizers in instruments with a s/n prefix <6021. Keysight N5247B Service Guide 5-43...
Page 214 Version 6 synthesizers and below: Below 100MHz, the LFE option is enabled in the firmware. Depending on the frequency measured, the LFE board receiver will be in ‘mixer mode’ or in ‘direct conversion mode’. See also, “Version 7 synthesizers” on page 5-45. 5-44 Keysight N5247B Service Guide...
Page 215 Figure 5-14 on page 5-45 shows an example of current frequency bands in a PNA. In an N5247B PNA, the IF frequency will change around 53 MHz. Figure 5-14 on page 5-45 shows the new structure of the frequency bands with the LFE option.
Page 216: Signal Separation Group Operation
— the A32 port 2 reference coupler and the A27 mixer brick receiver R2 — the A29 port 1 reference coupler and the A33 test port 1 coupler — the A30 port 3 reference coupler and the A34 test port 3 coupler 5-46 Keysight N5247B Service Guide...
Page 217: A29-A32 Reference Couplers
A33–A36 test port couplers. A33–A36 Test Port Couplers The test signals go into the through-line arm of the couplers, and from there to the test ports and the DUT. Keysight N5247B Service Guide 5-47...
Page 218 A, B, C, and D for 4-port models or inputs A and B for 2-port models. The coupling coefficient of the directional couplers is nominally 15 dB for all frequencies above 500 MHz. The coupling coefficient increases for frequencies below 500 MHz. 5-48 Keysight N5247B Service Guide...
Page 219 Theory of Operation Signal Separation Group Operation Figure 5-16 4-Port Signal Separation Group Keysight N5247B Service Guide 5-49...
Page 220 Theory of Operation Signal Separation Group Operation Figure 5-17 2-Port Signal Separation Group 5-50 Keysight N5247B Service Guide...
Page 221: A38-A41 50-Db Source Step Attenuators And A42-A45 Bias Tees (Optional)
A29–A32 reference couplers. On 2-port models with Option 224, a mechanical switch is placed in the signal path of each test port between the A5 and A10 26.5 GHz sources and the A29–A32 reference couplers. Keysight N5247B Service Guide 5-51...
Page 222 These signals typically come from the analyzer’s two internal sources and are jumpered on the rear panel. 5-52 Keysight N5247B Service Guide...
Page 223: Receiver Group Operation
(receivers A, B, C, and D for 4-port models and A and B for 2-port models) and the reference signals (receivers R1, R2, R3, and R4 for 4-port models and R1 and R2 for 2-port models) are mixed with a synthesized LO Keysight N5247B Service Guide 5-53...
Page 224: A24 If Multiplexer Board
PULSE I/O Connector Pin Assignments DB-15 Female Connector Name Description IFGateAin IF pulse gate input A (TTL) IFGateBin IF pulse gate input B (TTL) 1. A26 splitter only applies to PNAs with serial number prefix <6021. 5-54 Keysight N5247B Service Guide...
Page 225: A16 Spam Board (Analog Description)
(CPU). The digitized data is processed into magnitude and phase data by the DSP and sent to the CPU random access memory (RAM) by way of the peripheral component interconnect (PCI) bus. Keysight N5247B Service Guide 5-55...
Page 226 The processed and formatted data is finally routed to the display, and to the general-purpose interface bus (GPIB) for remote operation. Refer to “Digital Processing and Digital Control Group Operation” on page 5-59 for more information on signal processing. 5-56 Keysight N5247B Service Guide...
Page 227 Theory of Operation Receiver Group Operation Figure 5-18 4-Port Receiver Group Keysight N5247B Service Guide 5-57...
Page 228 Theory of Operation Receiver Group Operation Figure 5-19 2-Port Receiver Group 5-58 Keysight N5247B Service Guide...
Page 229: Digital Processing And Digital Control Group Operation
A2 USB Board — A3 Display Assembly — Keypad Assembly — A18 System Motherboard — Data Acquisition and Processing Subgroup — A16 SPAM Board (Digital Description) — A21 CPU Board — A55 Solid State Drive Keysight N5247B Service Guide 5-59...
Page 230 Theory of Operation Digital Processing and Digital Control Group Operation Figure 5-20 Digital Processing and Digital Control Group 5-60 Keysight N5247B Service Guide...
Page 231: Front Panel Subgroup
The video data received from the A21 CPU board includes the following: • digital TTL horizontal sync • digital TTL red video • blanking • digital TTL vertical sync • digital TTL green video • data clock • digital TTL blue video Keysight N5247B Service Guide 5-61...
Page 232: Data Acquisition And Processing Subgroup
In addition, when the analyzer is in the system controller mode, the CPU controls peripheral devices through the peripheral port interfaces. Front panel settings are stored in SRAM, with a battery providing at least five years of backup storage when external power is off. 5-62 Keysight N5247B Service Guide...
Page 233 A21 CPU board. The full operating system and firmware for the network analyzer is stored on the A55 solid state drive. Keysight N5247B Service Guide 5-63...
Page 234: Power Supply Group Operation
The +15 V standby supply remains on continuously whenever the power supply is plugged in. This supply is used to provide power to front panel LEDs and CPU components when the analyzer is turned off. 5-64 Keysight N5247B Service Guide...
Page 235: Noise Measurement Group Operation (Option 029)
A9 Noise Receiver board. For frequencies between 10 MHz – 6 GHz, the noise signals bypass the A59 noise downconverter, going to the A9 noise receiver board, where the signals are amplified, filtered, and mixed with the LO synthesized signal to produce the IF noise signals. Keysight N5247B Service Guide 5-65...
Page 236: A9 Noise Receiver Board
In the ADC, the signals are processed and converted to digital form at the sampling rate of 40 MHz. The digitized data is then sent to the A18 system motherboard via the data bus. 5-66 Keysight N5247B Service Guide...
Page 237 Theory of Operation Noise Measurement Group Operation (Option 029) Figure 5-21 Noise Measurement Group (Option 029) Keysight N5247B Service Guide 5-67...
Page 238 Theory of Operation Noise Measurement Group Operation (Option 029) 5-68 Keysight N5247B Service Guide...
Page 239: Replaceable Parts
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 240: Ordering Information
Ordering Information To order a part listed in the replaceable parts lists: — include the part number — indicate the quantity required — Contact Keysight Technologies for instructions on where to send the order. Refer to “Contacting Keysight” on page 2-7.
Page 241: Assembly Replacement Sequence
Step 5. Perform the necessary performance tests. Refer to Chapter 3, “Tests and Adjustments.” Step 6. Keysight personnel: see Figure 1-1 on page 1-6 to review where the calibration stickers should be placed on the PNA. Keysight N5247B Service Guide...
Page 242: Rebuilt-Exchange Assemblies
— The defective assembly must be returned for credit under the terms of the rebuilt-exchange assembly program. — Spare assembly stock desired should be ordered using the new assembly part number. Keysight N5247B Service Guide...
Page 243 Replaceable Parts Rebuilt-Exchange Assemblies Figure 6-1 Module Exchange Procedure Keysight N5247B Service Guide...
Page 244: Replaceable Parts Listings
— listed by the type of part in Table 6-2. Table 6-1 Part Number Listing by Reference Designator Reference Description Location Designator front-panel interface board “Front-panel Assembly, Back Side, All Options” on page 6-14 USB board Display assembly Keysight N5247B Service Guide...
Page 245 Testset motherboard Your option set determines which assemblies are in your PNA. Refer to IF multiplexer board “Bottom Assemblies and Cables by Option Set:” Table 6-2 on LO Multiplier/amplifier 26.5 (HMA26.5) page 6-10 Splitter Mixer Brick 1 Keysight N5247B Service Guide...
Page 246 Port 4 receiver step attenuator Port 2 receiver step attenuator Port 1 mechanical switch Port 3 mechanical switch Port 4 mechanical switch Port 2 mechanical switch Combiner Solid state drive “Top Assemblies and Cables, All Options:” on page 6-10. Keysight N5247B Service Guide...
Page 247 Figure 7-17 on page 38 and for details on A26 splitter and cabling , refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. Keysight N5247B Service Guide...
Page 248 Miscellaneous — Service Tools on page 6-204 — Documentation on page 6-204 — GPIB Cables/GPIB Adapter on page 6-204 — Fuses on page 6-204 — Battery on page 6-204 — Analyzer Accessories on page 6-205 6-10 Keysight N5247B Service Guide...
Page 249 Replaceable Parts Listings Table 6-2 Part Number Listing by Type of Part Miscellaneous (Continued) — USB Accessories on page 6-205 — ESD Supplies on page 6-205 — Rack Mount Kits and Handle Kits on page 6-205 Keysight N5247B Service Guide 6-11...
Page 250: Front-Panel Assembly, Front Side, All Options
W1312-40180 Front panel (RPG) knob, 32 mm  N5247-80017 Nameplate, N5247B N5247-80026 Nameplate, N5247B with Option 425 N5240-00010 Lower Dress Panel, 2-Port (ALL PNA models). Goes on, before lower front   panel overlay ( ). Attach with 0515-1946 subpanel screws.
Page 251 Not Shown N5242-00049 Guard, jumper cables, center—4-Port Not shown 5023-3074 Front handle a. Some options require 14 of the 0515-1946 screws to secure dress panel overlay subpanel. Figure 6-2 Front-panel Assembly, Front Side, All Options Keysight N5247B Service Guide 6-13...
Page 252: Front-Panel Assembly, Back Side, All Options
Power switch board (PCA for Power button keypad) N5242-40014 Power button keypad Display assembly N9912-20043 Tape (To secure cable E5071-61653 to 2090-1092 LCD’s connector and to secure cable E5071-61653 to J8 on the Interface board) Display assembly (continued from previous page) 6-14 Keysight N5247B Service Guide...
Page 253 N5240-60073 Touch screen controller board cable N5242-60075 Cable, A3 LED Driver board (Backlight converter board) to interface board N5242-60074 Power switch cable E5071-61660 Wire assembly, RPG (to attach RPG board (N5240-63083) to Interface board (J10) Keysight N5247B Service Guide 6-15...
Page 254 Replaceable Parts Replaceable Parts Listings Figure 6-3 Front Panel Assembly, Back Side, All Options Figure 6-4 A3 Display Assembly with Interface Board/USB Assemblies 6-16 Keysight N5247B Service Guide...
Page 255 Replaceable Parts Replaceable Parts Listings Figure 6-5 A3 Display Assembly with LCD Display 2090-1092 (LED) and Side Brackets Keysight N5247B Service Guide 6-17...
Page 256: Top Assemblies And Cables, All Options, Serial Number Prefixes <6021
Signal Processing ADC Module (SPAM) board Was N5240-60056 N5240-60074 13.5 GHz (source 2) synthesizer board (On 2-port models, this assembly is included only with Option 224.) N5242-60150 N5247-60002 System motherboard W1312-60376 Midplane board 0950-4934 Power supply 6-18 Keysight N5247B Service Guide...
Page 257 For more information on the N8985A SSD, refer to the Windows 10 Operating System Upgrade Kit Installation Note, available online at https://www.keysight.com/us/en/assets/9018-04733/installation-guides/9018-04733.pdf (N8985-90001). e. The lithium battery is located inside the A21 CPU board assembly. Refer to “Removing and Replacing the Lithium Bat- tery” on page 7-90 for an illustration. Keysight N5247B Service Guide 6-19...
Page 258 Replaceable Parts Replaceable Parts Listings Figure 6-6 Top Assemblies, All Options, S/N Prefixes <6021 6-20 Keysight N5247B Service Guide...
Page 259 A7 port 1 40 GHz doubler P5 to W66 N5247-20096 A12 port 3 40 GHz doubler P5 to W68 (On 2-port models, W67 is included only with Option 224.) N5242-60012 A24 IF multiplexer board P3 to A16 SPAM board J1 Keysight N5247B Service Guide 6-21...
Page 260 A26 splitter and cabling , refer to your option-model in Chapter 6 “2-Port Con- figurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 6-22 Keysight N5247B Service Guide...
Page 261 Replaceable Parts Replaceable Parts Listings Figure 6-7 Top Cables, All Cables—All Options, S/N Prefixes <6021 *SPAM 5 boards use W149 & W150 for 2-ports. RF cables W80 & W82 apply to 4-Port models. Keysight N5247B Service Guide 6-23...
Page 262: Top Assemblies And Cables, All Options, Serial Number Prefixes ≥6021
N5240-60077 Signal Processing ADC Module (SPAM) board Was N5240-60056 not used N5247-60002 System motherboard W1312-60376 Midplane board 0950-4934 Power supply Version 8 W1312-60522 CPU board assembly (See Version 7 W1312-60213 critical Was:W1312-60211 Was: W1312-60210 note) 6-24 Keysight N5247B Service Guide...
Page 263 For more information on the N8985A SSD, refer to the Windows 10 Operating System Upgrade Kit Installation Note, available online at https://www.keysight.com/us/en/assets/9018-04733/installation-guides/9018-04733.pdf (N8985-90001). e. The lithium battery is located inside the A21 CPU board assembly. Refer to “Removing and Replacing the Lithium Bat- tery” on page 7-90 for an illustration. Keysight N5247B Service Guide 6-25...
Page 264 Replaceable Parts Replaceable Parts Listings Figure 6-8 Top Assemblies, All Options, S/N Prefixes ≥6021 6-26 Keysight N5247B Service Guide...
Page 265 A15 13.5 GHz LO synthesizer board J5 to A25 HMA26.5 N5240-20125 Was:N5247-20110 N5247-20113 A7 port 1 40 GHz doubler P5 to W66 N5247-20096 A12 port 3 40 GHz doubler P5 to W68 (On 2-port models, W67 is included only with Option 224.) Keysight N5247B Service Guide 6-27...
Page 266 A26 splitter and cabling , refer to your option-model in Chapter 6 “2-Port Con- figurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 6-28 Keysight N5247B Service Guide...
Page 267 Replaceable Parts Replaceable Parts Listings Figure 6-9 Top Cables, All Cables—All Options, S/N Prefixes ≥6021 *SPAM 5 boards use W149 & W150 for 2-ports. RF cables W80 & W82 apply to 4-Port models. Keysight N5247B Service Guide 6-29...
Page 268 Replaceable Parts Replaceable Parts Listings 6-30 Keysight N5247B Service Guide...
Page 269: 2-Port Configurations, Serial Number Prefixes <6021
All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. Keysight N5247B Service Guide 6-31...
Page 270 Replaceable Parts Replaceable Parts Listings 6-32 Keysight N5247B Service Guide...
Page 271 Replaceable Parts Replaceable Parts Listings Figure 6-10 Bottom Assemblies, Standard 2-Port Configuration, Option 201, S/N Prefixes 6201 < Keysight N5247B Service Guide 6-33...
Page 272 A27 mixer brick (B) to A24 IF multiplexer (P201) W79-83 Refer to “Top Cables, All Cables—All Options, S/N Prefixes <6021” on page 6-21. N5247-60006 A60 port 1 70 GHz doubler J2 to A7 40 GHz doubler J401 6-34 Keysight N5247B Service Guide...
Page 273 HMA26.5 the N5245-20100 cable is used in all instruments. If you are unclear which HMA26.5 assembly your PNA has installed, refer to “Verify the Model/Version of HMA26.5 Installed” on page 7-37 and to Figure 7-17 on page Keysight N5247B Service Guide 6-35...
Page 274 Bottom RF Cables, Standard 2-Port Configuration, Option 201, S/N Prefixes <6201 *SPAM 5 boards use W149 & W150 for 2-ports. RF cables W80 & W82 apply to 4-Port models (not shown). See also “Top Cables, All Cables—All Options, S/N Prefixes <6021” on page 6-21. 6-36 Keysight N5247B Service Guide...
Page 275 HANDLER I/O to A23 test set motherboard J400 N5247-60014 A23 test set motherboard J551 to A27 mixer brick (1) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness Keysight N5247B Service Guide 6-37...
Page 276 Replaceable Parts Replaceable Parts Listings Figure 6-12 Bottom Ribbon Cables and Wire Harnesses, Standard 2-Port Configuration, Option 201, S/N Prefixes <6201 6-38 Keysight N5247B Service Guide...
Page 277 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. Keysight N5247B Service Guide 6-39...
Page 278 Replaceable Parts Replaceable Parts Listings Figure 6-13 Bottom Assemblies, 2-Port, Options 219, S/N Prefixes <6201 6-40 Keysight N5247B Service Guide...
Page 279 A33 port 1 coupler to A42 port 1 bias tee W113 N5247-20083 A32 port 2 reference coupler to A41 port 2 source attenuator W114 N5247-20034 A41 port 2 source attenuator to front-panel port 2 SOURCE OUT Keysight N5247B Service Guide 6-41...
Page 280 HMA26.5 the N5245-20100 cable is used in all instruments. If you are unclear which HMA26.5 assembly your PNA has installed, refer to “Verify the Model/Version of HMA26.5 Installed” on page 7-37 and to Figure 7-17 on page 6-42 Keysight N5247B Service Guide...
Page 281 Bottom RF Cables, 2-Port, Options 219, S/N Prefixes <6201 *SPAM 5 boards use W149 & W150 for 2-ports. RF cables W80 & W82 apply to 4-Port models (not shown). See also “Top Cables, All Cables—All Options, S/N Prefixes <6021” on page 6-21. Keysight N5247B Service Guide 6-43...
Page 282 HANDLER I/O to A23 test set motherboard J400 N5247-60014 A23 test set motherboard J551 to A27 mixer brick (1) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness 6-44 Keysight N5247B Service Guide...
Page 283 Replaceable Parts Replaceable Parts Listings Figure 6-15 Bottom Ribbon Cables and Wire Harnesses, 2-Port, Options 219, S/N Prefixes <6201 Keysight N5247B Service Guide 6-45...
Page 284 70 GHz doubler assembly port 1 70 GHz doubler assembly port SRC 2 OUT 1 70 GHz doubler assembly port SRC 2 OUT 2 70 GHz doubler assembly port 2 5087-7345 Tuner (Option 029 only) 6-46 Keysight N5247B Service Guide...
Page 285 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. Keysight N5247B Service Guide 6-47...
Page 286 Replaceable Parts Replaceable Parts Listings Figure 6-16 Bottom Assemblies, 2-Port, Option 224 with and without Option 029, S/N Prefixes <6201 A56, A57, A59, and A64 only with Option 029. 6-48 Keysight N5247B Service Guide...
Page 287 “Top Cables, All Cables—All Options, S/N Prefixes <6021” on page 6-21. N5247-60006 A60 port 1 70 GHz doubler J2 to A7 40 GHz doubler J401 N5247-60007 A60 port 1 70 GHz doubler J4 to A7 40 GHz doubler J500 Keysight N5247B Service Guide 6-49...
Page 288 PORT 3 SW TSET IN (J7) to A51 SRC2 OUT1 m. switch W138 N5247-20032 A53 port 2 mechanical switch to A63 70 GHz doubler W140 N5247-20033 A53 port 2 mechanical switch to A32 port 2 reference coupler 6-50 Keysight N5247B Service Guide...
Page 289 A59 noise receiver (downconverter) to A26 splitter (Option 029 only) W176 N5247-20185 A25 HMA26.5 to A28 mixer brick (2) W204 N5247-20184 RF cable, A25 HMA26.5 to A59 noise receiver (downconverter) – W207 (2-Port with Option 029 only) Keysight N5247B Service Guide 6-51...
Page 290 HMA26.5 the N5245-20100 cable is used in all instruments. If you are unclear which HMA26.5 assembly your PNA has installed, refer to “Verify the Model/Version of HMA26.5 Installed” on page 7-37 and to Figure 7-17 on page 6-52 Keysight N5247B Service Guide...
Page 291 Bottom RF Cables, 2-Port, Options 224, S/N Prefixes <6201 *SPAM 5 boards use W149 & W150 for 2-ports. RF cables W80 & W82 apply to 4-Port models (not shown). See also “Top Cables, All Cables—All Options, S/N Prefixes <6021” on page 6-21. Keysight N5247B Service Guide 6-53...
Page 292 Bottom RF Cables, 2-Port, Option 224 with Option 029, S/N Prefixes <6201 *SPAM 5 boards use W149 & W150 for 2-ports. RF cables W80 & W82 apply to 4-Port models (not shown). See also “Top Cables, All Cables—All Options, S/N Prefixes <6021” on page 6-21. 6-54 Keysight N5247B Service Guide...
Page 293 A63 port 2 70 GHz doubler J1 to A23 test set motherboard J6 N5247-60022 A23 test set motherboard J209 to A25 HMA26.5 J1 N5247-60018 A62 SRC 2 OUT 2 70 GHz doubler J1 to A23 test set motherboard J3 Keysight N5247B Service Guide 6-55...
Page 294 HANDLER I/O to A23 test set motherboard J400 N5247-60014 A23 test set motherboard J551 to A27 mixer brick (1) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness 6-56 Keysight N5247B Service Guide...
Page 295 Replaceable Parts Replaceable Parts Listings Figure 6-19 Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 224 with and without Option 029, S/N Prefixes <6201 Cables 3, 11, 15, and 19 apply only with Option 029. Keysight N5247B Service Guide 6-57...
Page 296 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. 6-58 Keysight N5247B Service Guide...
Page 297 Replaceable Parts Replaceable Parts Listings Figure 6-20 Bottom Assemblies, Standard 2-Port Configuration, Option 201, S/N Prefixes ≥6201 Keysight N5247B Service Guide 6-59...
Page 298 A27 mixer brick (B) to A24 IF multiplexer (P201) W79-83 Refer to “Top Cables, All Cables—All Options, S/N Prefixes ≥6021” on page 6-27. N5247-60006 A60 port 1 70 GHz doubler J2 to A7 40 GHz doubler J401 6-60 Keysight N5247B Service Guide...
Page 299 HMA26.5 the N5245-20100 cable is used in all instruments. If you are unclear which HMA26.5 assembly your PNA has installed, refer to “Verify the Model/Version of HMA26.5 Installed” on page 7-37 and to Figure 7-17 on page Keysight N5247B Service Guide 6-61...
Page 300 Bottom RF Cables, Standard 2-Port Configuration, Option 201, S/N Prefixes ≥6201 *SPAM 5 boards use W149 & W150 for 2-ports. RF cables W80 & W82 apply to 4-Port models (not shown). See also “Top Cables, All Cables—All Options, S/N Prefixes ≥6021” on page 6-27. 6-62 Keysight N5247B Service Guide...
Page 301 HANDLER I/O to A23 test set motherboard J400 N5247-60014 A23 test set motherboard J551 to A27 mixer brick (1) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness Keysight N5247B Service Guide 6-63...
Page 302 Replaceable Parts Replaceable Parts Listings Figure 6-22 Bottom Ribbon Cables and Wire Harnesses, Standard 2-Port Configuration, Option 201, S/N Prefixes ≥6201 6-64 Keysight N5247B Service Guide...
Page 303 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. Keysight N5247B Service Guide 6-65...
Page 304 Replaceable Parts Replaceable Parts Listings Figure 6-23 Bottom Assemblies, 2-Port, Options 219, S/N Prefixes ≥6201 6-66 Keysight N5247B Service Guide...
Page 305 A33 port 1 coupler to A42 port 1 bias tee W113 N5247-20083 A32 port 2 reference coupler to A41 port 2 source attenuator W114 N5247-20034 A41 port 2 source attenuator to front-panel port 2 SOURCE OUT Keysight N5247B Service Guide 6-67...
Page 306 HMA26.5 the N5245-20100 cable is used in all instruments. If you are unclear which HMA26.5 assembly your PNA has installed, refer to “Verify the Model/Version of HMA26.5 Installed” on page 7-37 and to Figure 7-17 on page 6-68 Keysight N5247B Service Guide...
Page 307 Bottom RF Cables, 2-Port, Options 219, S/N Prefixes ≥6201 *SPAM 5 boards use W149 & W150 for 2-ports. RF cables W80 & W82 apply to 4-Port models (not shown). See also “Top Cables, All Cables—All Options, S/N Prefixes ≥6021” on page 6-27. Keysight N5247B Service Guide 6-69...
Page 308 HANDLER I/O to A23 test set motherboard J400 N5247-60014 A23 test set motherboard J551 to A27 mixer brick (1) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness 6-70 Keysight N5247B Service Guide...
Page 309 Replaceable Parts Replaceable Parts Listings Figure 6-25 Bottom Ribbon Cables and Wire Harnesses, 2-Port, Options 219, S/N Prefixes ≥6201 Keysight N5247B Service Guide 6-71...
Page 310 70 GHz doubler assembly port SRC 2 OUT 2 70 GHz doubler assembly port 2 5087-7345 Tuner (Option 029 only) N5240-60058 front-panel LED board  a. Part numbers in italic typeface are for rebuilt exchange assemblies. Refer to “Rebuilt-Exchange Assemblies” on page 6-4. 6-72 Keysight N5247B Service Guide...
Page 311 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. Keysight N5247B Service Guide 6-73...
Page 312 Replaceable Parts Replaceable Parts Listings Figure 6-26 Bottom Assemblies, 2-Port, Option 224 with and without Option 029, S/N Prefixes ≥6201 A56, A57, A59, and A64 only with Option 029. 6-74 Keysight N5247B Service Guide...
Page 313 “Top Cables, All Cables—All Options, S/N Prefixes ≥6021” on page 6-27. N5247-60006 A60 port 1 70 GHz doubler J2 to A7 40 GHz doubler J401 N5247-60007 A60 port 1 70 GHz doubler J4 to A7 40 GHz doubler J500 Keysight N5247B Service Guide 6-75...
Page 314 PORT 3 SW TSET IN (J7) to A51 SRC2 OUT1 m. switch W138 N5247-20032 A53 port 2 mechanical switch to A63 70 GHz doubler W140 N5247-20033 A53 port 2 mechanical switch to A32 port 2 reference coupler 6-76 Keysight N5247B Service Guide...
Page 315 A25 HMA26.5 to A28 mixer brick (2) W204 N5247-20184 RF cable, A25 HMA26.5 to A59 noise receiver (downconverter) – W207 (2-Port with Option 029 only) a. SR = semirigid coaxial cable; F = flexible coaxial cable Keysight N5247B Service Guide 6-77...
Page 316 HMA26.5 the N5245-20100 cable is used in all instruments. If you are unclear which HMA26.5 assembly your PNA has installed, refer to “Verify the Model/Version of HMA26.5 Installed” on page 7-37 and to Figure 7-17 on page 6-78 Keysight N5247B Service Guide...
Page 317 Bottom RF Cables, 2-Port, Options 224, S/N Prefixes ≥6201 *SPAM 5 boards use W149 & W150 for 2-ports. RF cables W80 & W82 apply to 4-Port models (not shown). See also “Top Cables, All Cables—All Options, S/N Prefixes ≥6021” on page 6-27. Keysight N5247B Service Guide 6-79...
Page 318 Bottom RF Cables, 2-Port, Option 224 with Option 029, S/N Prefixes ≥6201 *SPAM 5 boards use W149 & W150 for 2-ports. RF cables W80 & W82 apply to 4-Port models (not shown). See also “Top Cables, All Cables—All Options, S/N Prefixes ≥6021” on page 6-27. 6-80 Keysight N5247B Service Guide...
Page 319 A63 port 2 70 GHz doubler J1 to A23 test set motherboard J6 N5247-60022 A23 test set motherboard J209 to A25 HMA26.5 J1 N5247-60018 A62 SRC 2 OUT 2 70 GHz doubler J1 to A23 test set motherboard J3 Keysight N5247B Service Guide 6-81...
Page 320 HANDLER I/O to A23 test set motherboard J400 N5247-60014 A23 test set motherboard J551 to A27 mixer brick (1) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness 6-82 Keysight N5247B Service Guide...
Page 321 Replaceable Parts Replaceable Parts Listings Figure 6-29 Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 224 with and without Option 029, S/N Prefixes ≥6201 Cables 3, 11, 15, and 19 apply only with Option 029. Keysight N5247B Service Guide 6-83...
Page 322: 4-Port Configuration, Serial Number Prefixes <6021
Reference mixer switch 5087-7336 70 GHz doubler assembly port 1 70 GHz doubler assembly port 3 70 GHz doubler assembly port 4 70 GHz doubler assembly port 2 08490-60037 3-dB attenuator (A28 mixer brick (R4) 6-84 Keysight N5247B Service Guide...
Page 323 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. Keysight N5247B Service Guide 6-85...
Page 324 Replaceable Parts Replaceable Parts Listings Figure 6-30 Bottom Assemblies, Standard 4-Port Configuration, Option 401, S/N Prefixes <6201 6-86 Keysight N5247B Service Guide...
Page 325 A32 port 2 ref coupler to front-panel port 2 SOURCE OUT N5247-20018 Port 2 CPLR THRU to A36 port 2 coupler N5247-20076 A32 port 2 ref coupler to front-panel REF 2 SOURCE OUT N5247-20019 A36 port 2 coupler to front-panel port 2 CPLR ARM Keysight N5247B Service Guide 6-87...
Page 326 A28 mixer brick (R4) to A24 IF multiplexer (P414) N5242-60020 A28 mixer brick (R3) to A24 IF multiplexer (P413) N5242-60023 A28 mixer brick (C) to A24 IF multiplexer (P601) N5242-60013 A24 IF multiplexer board P203 to A16 SPAM board J2 6-88 Keysight N5247B Service Guide...
Page 327 HMA26.5 the N5245-20100 cable is used in all instruments. If you are unclear which HMA26.5 assembly your PNA has installed, refer to “Verify the Model/Version of HMA26.5 Installed” on page 7-37 and to Figure 7-17 on page Keysight N5247B Service Guide 6-89...
Page 328 38 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configu- rations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 6-90 Keysight N5247B Service Guide...
Page 329 A23 test set motherboard J551 to A27 mixer brick (1) J52 N5247-60015 A23 test set motherboard J552 to A28 mixer brick (2) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness Keysight N5247B Service Guide 6-91...
Page 330 Replaceable Parts Replaceable Parts Listings Figure 6-32 Bottom Ribbon Cables and Wire Harnesses, Standard 4-Port Configuration, Option 401, S/N Prefixes <6201 6-92 Keysight N5247B Service Guide...
Page 331 70 GHz doubler assembly port 2 08490-60037 3-dB attenuator (A28 mixer brick (R1) N5240-60058 front-panel LED board  a. Part numbers in italic typeface are for rebuilt exchange assemblies. Refer to “Rebuilt-Exchange Assemblies” on page 6-4. Keysight N5247B Service Guide 6-93...
Page 332 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. 6-94 Keysight N5247B Service Guide...
Page 333 Replaceable Parts Replaceable Parts Listings Bottom Assemblies, 4-Port, Options 419 , S/N Prefixes <6201 Figure 6-33 Keysight N5247B Service Guide 6-95...
Page 334 A63 port 2 70 GHz doubler J2 to A8 40 GHz doubler J401 N5247-60009 A63 port 2 70 GHz doubler J4 to A8 40 GHz doubler J500 W101 N5247-20083 A29 port 1 reference coupler to A38 port 1 source attenuator 6-96 Keysight N5247B Service Guide...
Page 335 HMA26.5 the N5245-20100 cable is used in all instruments. If you are unclear which HMA26.5 assembly your PNA has installed, refer to “Verify the Model/Version of HMA26.5 Installed” on page 7-37 and to Figure 7-17 on page Keysight N5247B Service Guide 6-97...
Page 336 Figure 7-17 on page 38 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 6-98 Keysight N5247B Service Guide...
Page 337 A30 port 3 reference coupler to A39 port 3 source attenuator W106 N5247-20009 A39 port 3 source attenuator to front-panel port 3 SOURCE OUT W107 N5247-20010 Port 3 CPLR THRU to A43 port 3 bias tee Keysight N5247B Service Guide 6-99...
Page 338 Figure 7-17 on page 38 and for details on A26 splitter and cabling , refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 6-100 Keysight N5247B Service Guide...
Page 339 Figure 7-17 on page 38 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. Keysight N5247B Service Guide 6-101...
Page 340 A24 IF multiplexer board J1 E4410-60160 A18 system motherboard J13 to A23 test set motherboard J545 8121-0834 rear-panel HANDLER I/O to A23 test set motherboard J400 N5247-60014 A23 test set motherboard J551 to A27 mixer brick (1) J52 6-102 Keysight N5247B Service Guide...
Page 341 Part Number Description Type Designator N5247-60015 A23 test set motherboard J552 to A28 mixer brick (2) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness Keysight N5247B Service Guide 6-103...
Page 342 Replaceable Parts Replaceable Parts Listings Figure 6-36 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Options 419, S/N Prefixes <6201 6-104 Keysight N5247B Service Guide...
Page 343 Port 4 receiver attenuator Port 2 receiver attenuator N1811-60010 Port 1 mechanical switch Port 3 mechanical switch Port 4 mechanical switch Port 2 mechanical switch 11667-60016 Combiner N1811-60010 Port 1 noise bypass switch Port 2 noise bypass switch Keysight N5247B Service Guide 6-105...
Page 344 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. 6-106 Keysight N5247B Service Guide...
Page 345 Replaceable Parts Replaceable Parts Listings Figure 6-37 Bottom Assemblies, 4-Port, Option 423 with and without 029, S/N Prefixes <6201 Keysight N5247B Service Guide 6-107...
Page 346 A33 port 1 coupler to A42 port 1 bias tee W113 N5247-20083 A32 port 2 reference coupler to A41 port 2 source attenuator W114 N5247-20034 A41 port 2 source attenuator to front-panel port 2 SOURCE OUT 6-108 Keysight N5247B Service Guide...
Page 347 “Top Assemblies and Cables, All Options, Serial Number Prefixes <6021” on W172, page 6-18. W173 W174 N5247-20143 A59 noise receiver (downconverter) to A28 mixer brick W175 Refer to “Top Assemblies and Cables, All Options, Serial Number Prefixes <6021” on page 6-18. Keysight N5247B Service Guide 6-109...
Page 348 HMA26.5 the N5245-20100 cable is used in all instruments. If you are unclear which HMA26.5 assembly your PNA has installed, refer to “Verify the Model/Version of HMA26.5 Installed” on page 7-37 and to Figure 7-17 on page 6-110 Keysight N5247B Service Guide...
Page 349 Figure 7-17 on page 38 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. Keysight N5247B Service Guide 6-111...
Page 350 Figure 7-17 on page 38 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 6-112 Keysight N5247B Service Guide...
Page 351 Port 3 CPLR THRU to A43 port 3 bias tee W108 N5247-20028 A43 port 3 bias tee to A34 port 3 coupler W109 N5247-20083 A31 port 4 reference coupler to A40 port 4 source attenuator Keysight N5247B Service Guide 6-113...
Page 352 Figure 7-17 on page 38 and for details on A26 splitter and cabling , refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 6-114 Keysight N5247B Service Guide...
Page 353 Figure 7-17 on page 38 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. Keysight N5247B Service Guide 6-115...
Page 354 Figure 7-17 on page 38 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 6-116 Keysight N5247B Service Guide...
Page 355 J41 port 2). Refer to “4-Port Configuration, Option 423 with and without Option 029, S/N Prefixes <6201” on page 6-105. (Option 029 only) N5245-60006 A23 test set motherboard J548 to A40 port 4 source attenuator Keysight N5247B Service Guide 6-117...
Page 356 A23 test set motherboard J551 to A27 mixer brick (1) J52 N5247-60015 A23 test set motherboard J552 to A28 mixer brick (2) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness 6-118 Keysight N5247B Service Guide...
Page 357 Replaceable Parts Replaceable Parts Listings Figure 6-42 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 423 with and without Option 029, S/N Prefixes <6201 Cables 3, 18, 21, and 26 apply only with Option 029. Keysight N5247B Service Guide 6-119...
Page 358 Port 2 receiver attenuator N1811-60010 Port 1 mechanical switch Port 3 mechanical switch Port 4 mechanical switch Port 2 mechanical switch 11667-60016 Combiner N1811-60010 Port 1 noise bypass switch Port 2 noise bypass switch 5087-7344 noise receiver (downconverter) 6-120 Keysight N5247B Service Guide...
Page 359 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. Keysight N5247B Service Guide 6-121...
Page 360 Replaceable Parts Replaceable Parts Listings Figure 6-43 Bottom Assemblies, 4-Port, Option 425 with and without Option 029, S/N Prefixes <6021 A56, A57, A59 and A64 onl ith Option 029 6-122 Keysight N5247B Service Guide...
Page 361 A41 port 2 source attenuator to front-panel port 2 SOURCE OUT W117 N5247-20013 Front-panel port 1 RCVR A IN to A46 port 1 receiver attenuator W118 N5247-20047 A46 port 1 receiver attenuator to A27 mixer brick (A) Keysight N5247B Service Guide 6-123...
Page 362 Cable, assy-RF, Port 1 CPLR THRU to A71 port 1 bias combiner (Option 425 only withOUT Option 029) W182 N5247-20162 Cable, assy-RF, A71 Bias combiner-A33 Coupler FP, Port 1 W187 N5247-20163 Cable, assy-RF, Port 2 CPLR THRU to A74 bias combiner (Option 425 only) 6-124 Keysight N5247B Service Guide...
Page 363 HMA26.5 the N5245-20100 cable is used in all instruments. If you are unclear which HMA26.5 assembly your PNA has installed, refer to “Verify the Model/Version of HMA26.5 Installed” on page 7-37 and to Figure 7-17 on page Keysight N5247B Service Guide 6-125...
Page 364 Figure 7-17 on page 38 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 6-126 Keysight N5247B Service Guide...
Page 365 Figure 7-17 on page 38 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. Keysight N5247B Service Guide 6-127...
Page 366 A40 port 4 source attenuator to front-panel port 4 SOURCE OUT W119 N5247-20008 Port 3 RCVR C IN to A47 port 3 receiver attenuator W120 N5247-20064 A47 port 3 receiver attenuator to A28 mixer brick (C) 6-128 Keysight N5247B Service Guide...
Page 367 Figure 7-17 on page 38 and for details on A26 splitter and cabling , refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. Keysight N5247B Service Guide 6-129...
Page 368 Figure 7-17 on page 38 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 6-130 Keysight N5247B Service Guide...
Page 369 Figure 7-17 on page 38 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. Keysight N5247B Service Guide 6-131...
Page 370 P/O A57 port 2 noise bypass switch (to A59 noise receiver (downconverter) J41 port 2). Refer to “4-Port Configuration, Option 425 with and without 029, S/N Prefixes <6021” on page 6-120. (Option 029 only) N5245-60006 A23 test set motherboard J548 to A40 port 4 source attenuator 6-132 Keysight N5247B Service Guide...
Page 371 A23 test set motherboard J551 to A27 mixer brick (1) J52 N5247-60015 A23 test set motherboard J552 to A28 mixer brick (2) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness Keysight N5247B Service Guide 6-133...
Page 372 Replaceable Parts Replaceable Parts Listings Figure 6-48 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 425 with and without Option 029 , S/N Prefixes <6021 Cables 3, 13, 21, and 26 apply only with Option 029. 6-134 Keysight N5247B Service Guide...
Page 373 Replaceable Parts Replaceable Parts Listings Keysight N5247B Service Guide 6-135...
Page 374: 4-Port Configurations, Serial Number Prefix ≥6021
70 GHz doubler assembly port 1 70 GHz doubler assembly port 3 70 GHz doubler assembly port 4 70 GHz doubler assembly port 2 08490-60037 3-dB attenuator (A28 mixer brick (R1) N5240-60058 front-panel LED board  6-136 Keysight N5247B Service Guide...
Page 375 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. Keysight N5247B Service Guide 6-137...
Page 376 Replaceable Parts Replaceable Parts Listings Figure 6-49 Bottom Assemblies, Standard 4-Port Configuration, Option 401, S/N Prefixes ≥6201 6-138 Keysight N5247B Service Guide...
Page 377 A32 port 2 ref coupler to front-panel port 2 SOURCE OUT N5247-20018 Port 2 CPLR THRU to A36 port 2 coupler N5247-20076 A32 port 2 ref coupler to front-panel REF 2 SOURCE OUT N5247-20019 A36 port 2 coupler to front-panel port 2 CPLR ARM Keysight N5247B Service Guide 6-139...
Page 378 A28 mixer brick (R4) to A24 IF multiplexer (P414) N5242-60020 A28 mixer brick (R3) to A24 IF multiplexer (P413) N5242-60023 A28 mixer brick (C) to A24 IF multiplexer (P601) N5242-60013 A24 IF multiplexer board P203 to A16 SPAM board J2 6-140 Keysight N5247B Service Guide...
Page 379 HMA26.5 the N5245-20100 cable is used in all instruments. If you are unclear which HMA26.5 assembly your PNA has installed, refer to “Verify the Model/Version of HMA26.5 Installed” on page 7-37 and to Figure 7-17 on page Keysight N5247B Service Guide 6-141...
Page 380 Replaceable Parts Replaceable Parts Listings Figure 6-50 Bottom RF Cables, Standard 4-Port Configuration, Option 401, S/N Prefixes ≥6201 6-142 Keysight N5247B Service Guide...
Page 381 Replaceable Parts Replaceable Parts Listings This page intentionally left blank. Keysight N5247B Service Guide 6-143...
Page 382 A23 test set motherboard J551 to A27 mixer brick (1) J52 N5247-60015 A23 test set motherboard J552 to A28 mixer brick (2) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness 6-144 Keysight N5247B Service Guide...
Page 383 Replaceable Parts Replaceable Parts Listings Figure 6-51 Bottom Ribbon Cables and Wire Harnesses, Standard 4-Port Configuration, Option 401, S/N Prefixes ≥6201 Keysight N5247B Service Guide 6-145...
Page 384 70 GHz doubler assembly port 2 08490-60037 3-dB attenuator (A28 mixer brick (R1) N5240-60058 front-panel LED board  a. Part numbers in italic typeface are for rebuilt exchange assemblies. Refer to “Rebuilt-Exchange Assemblies” on page 6-4. 6-146 Keysight N5247B Service Guide...
Page 385 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. Keysight N5247B Service Guide 6-147...
Page 386 Replaceable Parts Replaceable Parts Listings Figure 6-52 Bottom Assemblies, 4-Port, Options 419, S/N Prefixes ≥6201 6-148 Keysight N5247B Service Guide...
Page 387 A63 port 2 70 GHz doubler J2 to A8 40 GHz doubler J401 N5247-60009 A63 port 2 70 GHz doubler J4 to A8 40 GHz doubler J500 W101 N5247-20083 A29 port 1 reference coupler to A38 port 1 source attenuator Keysight N5247B Service Guide 6-149...
Page 388 HMA26.5 the N5245-20100 cable is used in all instruments. If you are unclear which HMA26.5 assembly your PNA has installed, refer to “Verify the Model/Version of HMA26.5 Installed” on page 7-37 and to Figure 7-17 on page 6-150 Keysight N5247B Service Guide...
Page 389 Replaceable Parts Replaceable Parts Listings Figure 6-53 Bottom RF Cables, 4-Port, Options 419 (Ports 1 and 2), S/N Prefixes ≥6201 Keysight N5247B Service Guide 6-151...
Page 390 A30 port 3 reference coupler to A39 port 3 source attenuator W106 N5247-20009 A39 port 3 source attenuator to front-panel port 3 SOURCE OUT W107 N5247-20010 Port 3 CPLR THRU to A43 port 3 bias tee 6-152 Keysight N5247B Service Guide...
Page 391 Figure 7-17 on page 38 and for details on A26 splitter and cabling , refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. Keysight N5247B Service Guide 6-153...
Page 392 Figure 7-17 on page 38 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 6-154 Keysight N5247B Service Guide...
Page 393 A24 IF multiplexer board J1 E4410-60160 A18 system motherboard J13 to A23 test set motherboard J545 8121-0834 rear-panel HANDLER I/O to A23 test set motherboard J400 N5247-60014 A23 test set motherboard J551 to A27 mixer brick (1) J52 Keysight N5247B Service Guide 6-155...
Page 394 Part Number Description Type Designator N5247-60015 A23 test set motherboard J552 to A28 mixer brick (2) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness 6-156 Keysight N5247B Service Guide...
Page 395 Replaceable Parts Replaceable Parts Listings Figure 6-55 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Options 419, S/N Prefixes ≥6201 Keysight N5247B Service Guide 6-157...
Page 396 Port 4 receiver attenuator Port 2 receiver attenuator N1811-60010 Port 1 mechanical switch Port 3 mechanical switch Port 4 mechanical switch Port 2 mechanical switch 11667-60016 Combiner N1811-60010 Port 1 noise bypass switch Port 2 noise bypass switch 6-158 Keysight N5247B Service Guide...
Page 397 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. Keysight N5247B Service Guide 6-159...
Page 398 Replaceable Parts Replaceable Parts Listings Figure 6-56 Bottom Assemblies, 4-Port, Option 423 with and without 029, S/N Prefixes ≥ 6201 6-160 Keysight N5247B Service Guide...
Page 399 A33 port 1 coupler to A42 port 1 bias tee W113 N5247-20083 A32 port 2 reference coupler to A41 port 2 source attenuator W114 N5247-20034 A41 port 2 source attenuator to front-panel port 2 SOURCE OUT Keysight N5247B Service Guide 6-161...
Page 400 A59 noise receiver (downconverter) to A28 mixer brick W175 ≥ Refer to “Top Assemblies and Cables, All Options, Serial Number Prefixes 6021” on page 6-24. a. SR = semirigid coaxial cable; F = flexible coaxial cable 6-162 Keysight N5247B Service Guide...
Page 401 HMA26.5 the N5245-20100 cable is used in all instruments. If you are unclear which HMA26.5 assembly your PNA has installed, refer to “Verify the Model/Version of HMA26.5 Installed” on page 7-37 and to Figure 7-17 on page Keysight N5247B Service Guide 6-163...
Page 402 Replaceable Parts Replaceable Parts Listings ≥ Figure 6-57 Bottom RF Cables, 4-Port, Options 423 (Ports 1 and 2), S/N Prefixes 6201 Option 423 with 029 is shown, but similar to Option 423 without Option 029 6-164 Keysight N5247B Service Guide...
Page 403 Replaceable Parts Replaceable Parts Listings Figure 6-58 Bottom RF Cables, 4-Port, Option 423 with Option 029 (Ports 1 and 2), S/N Prefixes ≥ 6201 Keysight N5247B Service Guide 6-165...
Page 404 Port 3 CPLR THRU to A43 port 3 bias tee W108 N5247-20028 A43 port 3 bias tee to A34 port 3 coupler W109 N5247-20083 A31 port 4 reference coupler to A40 port 4 source attenuator 6-166 Keysight N5247B Service Guide...
Page 405 Figure 7-17 on page 38 and for details on A26 splitter and cabling , refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. Keysight N5247B Service Guide 6-167...
Page 406 Replaceable Parts Replaceable Parts Listings Figure 6-59 Bottom RF Cables, 4-Port, Options 423 (Ports 3 and 4), S/N Prefixes ≥6201 Option 423 with 029 is shown, but similar to Option 423 without Option 029 6-168 Keysight N5247B Service Guide...
Page 407 Replaceable Parts Replaceable Parts Listings Figure 6-60 Bottom RF Cables, 4-Port, Option 423 with Option 029 (Ports 3 and 4), S/N Prefixes ≥6201 Keysight N5247B Service Guide 6-169...
Page 408 J41 port 2). Refer to “4-Port Configuration, Option 423 with and without Option 029, S/N Prefixes ≥6201” on page 6-158. (Option 029 only) N5245-60006 A23 test set motherboard J548 to A40 port 4 source attenuator 6-170 Keysight N5247B Service Guide...
Page 409 A23 test set motherboard J551 to A27 mixer brick (1) J52 N5247-60015 A23 test set motherboard J552 to A28 mixer brick (2) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness Keysight N5247B Service Guide 6-171...
Page 410 Replaceable Parts Replaceable Parts Listings Figure 6-61 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 423 with and without Option 029, S/N Prefixes ≥6201 Cables 3, 18, 21, and 26 apply only with Option 029. 6-172 Keysight N5247B Service Guide...
Page 411 Port 2 receiver attenuator N1811-60010 Port 1 mechanical switch Port 3 mechanical switch Port 4 mechanical switch Port 2 mechanical switch 11667-60016 Combiner N1811-60010 Port 1 noise bypass switch Port 2 noise bypass switch 5087-7344 noise receiver (downconverter) Keysight N5247B Service Guide 6-173...
Page 412 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. 6-174 Keysight N5247B Service Guide...
Page 413 Replaceable Parts Replaceable Parts Listings Figure 6-62 Bottom Assemblies, 4-Port, Option 425 with and without Option 029, S/N Prefixes ≥6021 A56, A57, A59, and A64 only with Option 029. Keysight N5247B Service Guide 6-175...
Page 414 A41 port 2 source attenuator to front-panel port 2 SOURCE OUT W117 N5247-20013 Front-panel port 1 RCVR A IN to A46 port 1 receiver attenuator W118 N5247-20047 A46 port 1 receiver attenuator to A27 mixer brick (A) 6-176 Keysight N5247B Service Guide...
Page 415 Cable, assy-RF, FP port 1 CPLR THRU to A71 port 1 bias combiner (Option 425 only withOUT Option 029) W182 N5247-20162 Cable, assy-RF, A71 Bias T combiner-A33 Coupler FP, Port 1 W187 N5247-20163 Cable, assy-RF, FP port 2 CPLR THRU to A74 bias combiner (Option 425 only) Keysight N5247B Service Guide 6-177...
Page 416 HMA26.5 the N5245-20100 cable is used in all instruments. If you are unclear which HMA26.5 assembly your PNA has installed, refer to “Verify the Model/Version of HMA26.5 Installed” on page 7-37 and to Figure 7-17 on page 6-178 Keysight N5247B Service Guide...
Page 417 Replaceable Parts Replaceable Parts Listings Figure 6-63 Bottom RF Cables, 4-Port, Options 425 (Ports 1 and 2), S/N Prefixes ≥6021 Keysight N5247B Service Guide 6-179...
Page 418 Replaceable Parts Replaceable Parts Listings Figure 6-64 Bottom RF Cables, 4-Port, Option 425 with Option 029 (Ports 1 and 2), S/N Prefixes ≥6021 6-180 Keysight N5247B Service Guide...
Page 419 A40 port 4 source attenuator to front-panel port 4 SOURCE OUT W119 N5247-20008 Port 3 RCVR C IN to A47 port 3 receiver attenuator W120 N5247-20064 A47 port 3 receiver attenuator to A28 mixer brick (C) Keysight N5247B Service Guide 6-181...
Page 420 Figure 7-17 on page 38 and for details on A26 splitter and cabling , refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 6-182 Keysight N5247B Service Guide...
Page 421 Replaceable Parts Replaceable Parts Listings Figure 6-65 Bottom RF Cables, 4-Port, Options 425 (Ports 3 and 4), S/N Prefixes ≥6021 Keysight N5247B Service Guide 6-183...
Page 422 Replaceable Parts Replaceable Parts Listings Figure 6-66 Bottom RF Cables, 4-Port, Option 425 with Option 029 (Ports 3 and 4), S/N Prefixes ≥6021 6-184 Keysight N5247B Service Guide...
Page 423 Option 029, S/N Prefixes ≥6201” on page 6-158. P/O A52 port 4 mechanical switch (to A23 test set motherboard J103). Refer to “4-Port Configuration, Option 423 with and without Option 029, S/N Prefixes ≥6201” on page 6-158. Keysight N5247B Service Guide 6-185...
Page 424 A23 test set motherboard J551 to A27 mixer brick (1) J52 N5247-60015 A23 test set motherboard J552 to A28 mixer brick (2) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness 6-186 Keysight N5247B Service Guide...
Page 425 Replaceable Parts Replaceable Parts Listings Figure 6-67 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 425 with and without Option 029, S/N Prefixes ≥6021 Cables 3, 13, 21, and 26 apply only with Option 029. Keysight N5247B Service Guide 6-187...
Page 426 Replaceable Parts Replaceable Parts Listings 6-188 Keysight N5247B Service Guide...
Page 427: Rear-Panel Assembly, All Options
Termination, 50 ohm load (2 used for Option 201. 219; 3 used for Option 224, 400, 419, 423) Was: 1810-0118 8121-0834 HANDLER I/O cable assembly Ferrite for ribbon cable 8121-0834 9170-2236 2190-0068 Lock washer (for rear-panel BNC connectors) 2950-0054 Hex nut (for rear-panel BNC connectors) Keysight N5247B Service Guide 6-189...
Page 428 Termination, 2.4 mm 50 GHz load (1 used for Option 224 and 423) Was N5247-20138 a. This part number is no longer required on s/n’s 5541, 5542, 5544, 5545, 5547, 5549 and newer. But, is included for your ref- erence. 6-190 Keysight N5247B Service Guide...
Page 429 Replaceable Parts Replaceable Parts Listings Figure 6-68 Rear-Panel Assembly, All Options Keysight N5247B Service Guide 6-191...
Page 430: Fan Assemblies, All Options
Fan bracket (for 3 fans)  0515-0372 Machine screw, M3.0 x 8, pan head (To attach: fan assemblies to chassis.)  Chassis (Refer to “Internal Hardware and Miscellaneous Parts, All Options” on page 6-200.)  6-192 Keysight N5247B Service Guide...
Page 431 Replaceable Parts Replaceable Parts Listings Figure 6-69 Fan Assemblies, Side View, All Options Keysight N5247B Service Guide 6-193...
Page 432: Top Hardware And Miscellaneous Parts, All Options
(2). (On 2-port models, source (2) is included only with Option 224.) not shown 0515-0666 Machine screw, M3.0 x 18, pan head (To attach source brackets to source (1) and source (2). (On 2-port models, source (2) is included only with Option 224.) 6-194 Keysight N5247B Service Guide...
Page 433 Replaceable Parts Replaceable Parts Listings Figure 6-70 Top Hardware and Miscellaneous Parts, Top View, All Options Keysight N5247B Service Guide 6-195...
Page 434: Bottom Hardware And Miscellaneous Parts
Option 029 tuner to side of test set deck.) N5235-00018 Bracket, Ribbon Cable Clamp N5247-20135 Mounting block (For A27 & A28 mixer bricks.) N5247-00002 Test set deck N5247-00006 Bracket, rear, bottom side - for semi rigid cables (Option 224 and 4-port models only.) 6-196 Keysight N5247B Service Guide...
Page 435 Washers for bulkhead connectors (Option 224 only.) 5064-7891 Bulkhead connectors (Option 224 only.) 0515-1521 Machine screw, M3.0 x 5, flat head (To attach front-panel LED boards.) 5022-1087 Test port coupler dress nut (One for each coupler.) Keysight N5247B Service Guide 6-197...
Page 436 Cross bracket on test set deck N5245-00033 Bracket, A56 and A57 noise bypass switches (Option 029) 0515-1992 Machine screw M5.0 x 20 pan head (To attach noise bypass switch bracket to side of test set deck.) 6-198 Keysight N5247B Service Guide...
Page 437 Replaceable Parts Replaceable Parts Listings Figure 6-71 Bottom Hardware and Miscellaneous Parts Keysight N5247B Service Guide 6-199...
Page 438: Internal Hardware And Miscellaneous Parts, All Options
(long) center.) N5247-00013 Front bracket  N5242-40002 PC board guides  N5240-20136 Bracket Center, long Not shown 5023-3074 Front handle 6-200 Keysight N5247B Service Guide...
Page 439 Replaceable Parts Replaceable Parts Listings Figure 6-72 Internal Hardware and Miscellaneous Parts, All Options Keysight N5247B Service Guide 6-201...
Page 440: External Hardware And Miscellaneous Parts, All Options
Not shown 5041-9174 Side strips for front handle Not shown 0515-2044 Machine screw, M4.0 x 12 flat head (To attach front handle to chassis.) Not shown N9040-40007 Front impact cover Not shown N9040-40008 Rear impact cover 6-202 Keysight N5247B Service Guide...
Page 441 Replaceable Parts Replaceable Parts Listings Figure 6-73 External Hardware and Miscellaneous Parts, All Options Keysight N5247B Service Guide 6-203...
Page 442: Miscellaneous Part Numbers
Rear-panel Bias Input Fuse; Ports 1, 2, 3, and 4 (0.5 A, 125 V) 2110-0824 Was 2110-0046 Connector Caps Cap, protective, 0.812-ID 1401-0214 Cap, protective, 0.625-ID 1401-0225 Cap, protective, 1/4 - 36 threads 5188-5406 Battery Battery, lithium manganese dioxide, 3V, 0.22A-hr. (located on A21 CPU board assembly) 1420-0356 6-204 Keysight N5247B Service Guide...
Page 443 N5231AU-1CP or N5232AU-1CP or N5239AU-1CP Option 1CP includes the following separately orderable items: Rack mount kit (rack mount flanges and hardware) 5063-1555 Rack mount rail set E3663AC 5063-1542 Front handle kit (two classic handles and hardware) Keysight N5247B Service Guide 6-205...
Page 444 “Analyzer Options, Accessories, and Upgrades Available” on page 2-3 for information on upgrades that are available for the N5247B analyzer. Refer to the section, “Analyzer Options, Accessories, and Upgrades Available” on page 2-3, for a complete description of each option included in the upgrades.
Page 445: Repair And Replacement Procedures
2-Port and 4-Port PNA-X Service Guide Repair and Replacement Procedures 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 446: Personal Safety Warnings
The front panel switch is only a standby switch and is not a LINE switch (disconnecting device) Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended. Discard used batteries according to manufacturer’s instructions. Keysight N5247B Service Guide...
Page 447: Electrostatic Discharge (Esd) Protection
To reduce the chance of electrostatic discharge, follow all of the recommendations outlined in “Electrostatic Discharge Protection” on page 1-7, for all of the procedures in this chapter. Keysight N5247B Service Guide...
Page 448: Removal And Replacement Procedures
Port 3 reference coupler Port 4 reference coupler Port 2 reference coupler Port 1 test port coupler page 7-46 Port 3 test port coupler Port 4 test port coupler Port 2 test port coupler page 7-48 Reference mixer switch Keysight N5247B Service Guide...
Page 449 Port 1 LFE Bias-T combiner - port 3 Port 1 LFE Bias-T combiner - port 4 Port 1 LFE Bias-T combiner - port 2 Rear panel page 7-84 Front panel LED boards page 7-86 Fans page 7-88 Lithium battery page 7-90 Keysight N5247B Service Guide...
Page 450: Removing The Covers
Ribbon cables and wires must never be positioned on top of hardware. 3. Reverse the order of the removal procedures above. Keysight N5247B Service Guide...
Page 451 Repair and Replacement Procedures Removing the Covers Figure 7-1 Outer and Inner Cover Removal Keysight N5247B Service Guide...
Page 452: Removing And Replacing The Front Panel Assembly
When reconnecting the front-panel jumpers, torque the connectors to 10 in-lb. 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. Keysight N5247B Service Guide...
Page 453 Repair and Replacement Procedures Removing and Replacing the Front Panel Assembly Figure 7-2 Front Panel Assembly Removal Keysight N5247B Service Guide...
Page 454: Removing And Replacing The A1-A3 And Other Front Panel Subassemblies
3. Disconnect the following cables from the A1 front panel interface board: tape (item [14]) from connector and the LCD display to interface board cable (item [18]), LED driver board (backlight converter board) to interface 7-10 Keysight N5247B Service Guide...
Page 455 4. Remove two screws (item ) and remove the power switch board. 5. The power button keypad can now be removed from the power switch board by gently pulling each of the rubber tabs through the PC board. Keysight N5247B Service Guide 7-11...
Page 456 9. With a T-6 TORX (set to 3-in-lb), remove the 2 screws (item [23]) on the side bracket that has the LCD cable (item [18]) attached to the LCD display. During re-assembly of the side brackets to the LCD display, it is very important to avoid over-tightening. 7-12 Keysight N5247B Service Guide...
Page 457 11. The touch screen can now be removed from the front panel assembly. Note the orientation of the touch screen in the front panel assembly for installation of the new touch screen. Figure 7-3 Front Panel Sub-assemblies Removal Keysight N5247B Service Guide 7-13...
Page 458 Repair and Replacement Procedures Removing and Replacing the A1–A3 and Other Front Panel Subassemblies Figure 7-4 A3 Display Assembly with LCD Display - Cables Figure 7-5 Remove LCD Cable, LCD to LED Inverter Board Cable, & Side Brackets 7-14 Keysight N5247B Service Guide...
Page 459 Removing and Replacing the A1–A3 and Other Front Panel Subassemblies Figure 7-6 Remove LCD Mounting Plate to LCD Display & LCD Display Cable Figure 7-7 Removing the Flat Flex Cable from the LCD to the Controller Board Keysight N5247B Service Guide 7-15...
Page 460 Repair and Replacement Procedures Removing and Replacing the A1–A3 and Other Front Panel Subassemblies Figure 7-8 Power Keypad to Power Button Board Figure 7-9 Remove Speaker Assembly and Mounting Foam 7-16 Keysight N5247B Service Guide...
Page 461 Removing and Replacing the A1–A3 and Other Front Panel Subassemblies Replacement Procedure 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. Keysight N5247B Service Guide 7-17...
Page 462: Removing And Replacing The A4-A17 Boards
Lift the two extractors (item ), one at each end of the board. Adjust the slack in the gray flexible cable as needed to move it out of the way, and lift the board out of the chassis. 7-18 Keysight N5247B Service Guide...
Page 463 If you have a new A15 version 7 synthesizer assembly installed, the A15 assembly will not perform correctly and will cause the PNA to display errors until the EE Default Adjustment synthesizer adjustments are completed, as per Table 7-2 on page 7-92. Keysight N5247B Service Guide 7-19...
Page 464 Repair and Replacement Procedures Removing and Replacing the A4–A17 Boards This page intentionally left blank. 7-20 Keysight N5247B Service Guide...
Page 465: Removing And Replacing The A18 System Motherboard
A18 System Motherboard. Refer to Figure 6-72 on page 6-201 for steps 14 and 15. 14. Remove four screws (item A) that secure the bottom of the midplane bracket to the chassis. Keysight N5247B Service Guide 7-21...
Page 466 Keep them for reinstallation on the replacement motherboard. Replacement Procedure 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. 7-22 Keysight N5247B Service Guide...
Page 467 Repair and Replacement Procedures Removing and Replacing the A18 System Motherboard Figure 7-10 A18 System Motherboard Removal Keysight N5247B Service Guide 7-23...
Page 468: Removing And Replacing The A19 Midplane Board
Remember to install the six rubber grommets on the bottom three alignment pins. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. 7-24 Keysight N5247B Service Guide...
Page 469 Repair and Replacement Procedures Removing and Replacing the A19 Midplane Board Figure 7-11 A19 Midplane Board Removal Keysight N5247B Service Guide 7-25...
Page 470: Removing And Replacing The A20 Power Supply Assembly
5. Slide the A20 power supply assembly out the rear of the analyzer. Replacement Procedure 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. 7-26 Keysight N5247B Service Guide...
Page 471 Repair and Replacement Procedures Removing and Replacing the A20 Power Supply Assembly Figure 7-12 A20 Power Supply Assembly Removal Keysight N5247B Service Guide 7-27...
Page 472: Removing And Replacing The A21 Cpu Board Assembly
A21 CPU board assembly, adhere it to the outer cover in the location specified in Figure 7-10 on page 7-23. 3. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. 7-28 Keysight N5247B Service Guide...
Page 473 Repair and Replacement Procedures Removing and Replacing the A21 CPU Board Assembly Figure 7-13 A21 CPU Board Assembly Removal Keysight N5247B Service Guide 7-29...
Page 474: Removing And Replacing The A22 Gpib Board
6. Slide the A22 GPIB board out the rear of the analyzer. Replacement Procedure 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. 7-30 Keysight N5247B Service Guide...
Page 475 Repair and Replacement Procedures Removing and Replacing the A22 GPIB Board Figure 7-14 A22 GPIB Board Removal Keysight N5247B Service Guide 7-31...
Page 476: Removing And Replacing The A23 Test Set Motherboard
3. Position the analyzer bottom side up. 4. Disconnect ALL ribbon cables (item A) and ALL wire harnesses (item B) from the A23 test set motherboard. 5. Remove connector hardware from 11 rear panel BNC connectors. 7-32 Keysight N5247B Service Guide...
Page 477 Replacement Procedure 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. Keysight N5247B Service Guide 7-33...
Page 478: Removing And Replacing The A24 If Multiplexer Board
Torque rear panel RF connector nuts to 21 in-lbs and PULSE I/O connector screws to 6 in-lbs. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. 7-34 Keysight N5247B Service Guide...
Page 479 Repair and Replacement Procedures Removing and Replacing the A24 IF Multiplexer Board Figure 7-15 A24 IF Multiplexer Board Removal Keysight N5247B Service Guide 7-35...
Page 480: Removing And Replacing The A25 Hma26.5
Figure 7-17 on page 38 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Pre- fixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 7-36 Keysight N5247B Service Guide...
Page 481: 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: — A26 splitter 5067-4086 — W62 N5247-20111 Keysight N5247B Service Guide 7-37...
Page 482 — W63 N5245-20023 — W64 N5245-20022 The new N5240-60101 HMA26.5 has the splitter integrated into the assembly. Refer to Figure 7-17 on page 7-38. Figure 7-17 Comparison of Legacy HMA26.5 (5087-7765) and New HMA26.5 (N5240-60101) 7-38 Keysight N5247B Service Guide...
Page 483: Removing And Replacing The A26 Splitter
Figure 7-17 on page 38 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. Keysight N5247B Service Guide 7-39...
Page 484 Figure 7-17 on page 38 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 7-40 Keysight N5247B Service Guide...
Page 485: Removing And Replacing The A27 And A28 Mixer Bricks
9. If replacing a mixer brick, remove 3 screws (not shown) that fasten each mixer brick to the mixer brick mounting block.  10. If replacing the A28 mixer brick, remove the 3 dB pad (item ) and keep it for reinstallation on the replacement mixer brick. Keysight N5247B Service Guide 7-41...
Page 486 Figure 7-17 on page 38 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 7-42 Keysight N5247B Service Guide...
Page 487 Orient the position of the reference couplers and brackets as shown in Figure 7-21. Torque all RF connectors to 10 in-lbs. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. Keysight N5247B Service Guide 7-43...
Page 488 Figure 7-17 on page 38 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 7-44 Keysight N5247B Service Guide...
Page 489 Repair and Replacement Procedures Removing and Replacing the A29 –A32 Reference Couplers and Reference Coupler Mounting Brackets Figure 7-21 Orientation of Reference Couplers with Brackets Keysight N5247B Service Guide 7-45...
Page 490: Removing And Replacing The A33-A36 Test Port Couplers
) to the new coupler in the same location as on the old one. If necessary, replace  the vibration mount (item ). Refer to “Bottom Hardware and Miscellaneous Parts” on page 6-196 for replacement part numbers. 7-46 Keysight N5247B Service Guide...
Page 491 Torque all connectors to 10 in-lbs. Torque coupler nuts to 72 in-lbs. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. Figure 7-22 A33 through A36 Test Port Couplers Removal Keysight N5247B Service Guide 7-47...
Page 492: Removing And Replacing The A37 Reference Mixer Switch
Figure 7-17 on page 38 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 7-48 Keysight N5247B Service Guide...
Page 493 ) and torque the connectors to 10 in-lbs, then tighten the  two mounting screws (item 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. Keysight N5247B Service Guide 7-49...
Page 494 Repair and Replacement Procedures Removing and Replacing the A37 Reference Mixer Switch Figure 7-23 A37 Reference Mixer Switch Removal 7-50 Keysight N5247B Service Guide...
Page 495: Attenuators
8. Remove two screws (not shown) from each attenuator to be removed from the mounting bracket. Keysight N5247B Service Guide 7-51...
Page 496 Figure 7-17 on page 38 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 7-52 Keysight N5247B Service Guide...
Page 497 Repair and Replacement Procedures Removing and Replacing the A38–A41 Source Attenuators and the A46–A49 Receiver Attenuators Figure 7-25 Orientation of Source and Receiver Attenuators with Brackets Keysight N5247B Service Guide 7-53...
Page 498: Removing And Replacing The A42-A45 Bias Tees
Orient the position of the bias tees and block as shown in Figure 7-27. Torque all cable connections to 10 in-lbs. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. 7-54 Keysight N5247B Service Guide...
Page 499 Figure 7-17 on page 38 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. Keysight N5247B Service Guide 7-55...
Page 500 Repair and Replacement Procedures Removing and Replacing the A42–A45 Bias Tees Figure 7-27 Orientation of Bias Tees with Block 7-56 Keysight N5247B Service Guide...
Page 501: Removing And Replacing The A50-A53 Bypass Switches And The A54 Combiner
7. Disconnect the wire harness cable of the bypass switch to be removed from the test set motherboard. 8. Remove two screws that attach the bypass switch or the A54 combiner to its bracket. Keysight N5247B Service Guide 7-57...
Page 502 Figure 7-17 on page 38 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 7-58 Keysight N5247B Service Guide...
Page 503 Repair and Replacement Procedures Removing and Replacing the A50–A53 Bypass Switches and the A54 Combiner Figure 7-29 Orientation of Bypass Switches with Bracket Keysight N5247B Service Guide 7-59...
Page 504: Removing And Replacing The A55 Solid State Drive (Ssd)
1. Disconnect the analyzer power cord. 2. Position the analyzer for access to the rear panel.  3. Loosen the SSD thumb screw (item  4. Pull the SSD out from the CPU assembly, using the handle (item 7-60 Keysight N5247B Service Guide...
Page 505 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. The network analyzer must be powered up and operating. Keysight N5247B Service Guide 7-61...
Page 506: Removing And Replacing The A60-A63 70 Ghz Doublers
Disconnect these cables and remove the doubler mounting bracket, with the two doublers attached, from the analyzer. 9. Remove three screws that attach the doubler to be replaced to its mounting bracket, and remove the doubler from the bracket. 7-62 Keysight N5247B Service Guide...
Page 507 Figure 7-17 on page 38 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. Keysight N5247B Service Guide 7-63...
Page 508: Removing And Replacing The A56 Port 1 Noise Bypass Switch (Option 029)
7. Move the disconnected semirigid cables out of the way and remove the switch from the analyzer. It may be necessary to loosen the other end of the cables to allow them to be moved. Do not overbend them. Replacement Procedure 7-64 Keysight N5247B Service Guide...
Page 509 Figure 7-17 on page 38 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. Keysight N5247B Service Guide 7-65...
Page 510: Removing And Replacing The A57 Port 2 Noise Bypass Switch (Option 029)
7. Move the disconnected semirigid cables out of the way and remove the switch from the analyzer. It may be necessary to loosen the other end of the cables to allow them to be moved. Do not overbend them. Replacement Procedure 7-66 Keysight N5247B Service Guide...
Page 511 Figure 7-17 on page 38 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. Keysight N5247B Service Guide 7-67...
Page 512: Removing And Replacing The A59 Noise Receiver (Downconverter) - (Option 029)
1. Reverse the order of the removal procedure reusing the existing hardware. Torque all cable connectors to 10 in-lbs. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. 7-68 Keysight N5247B Service Guide...
Page 513 Figure 7-17 on page 38 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. Keysight N5247B Service Guide 7-69...
Page 514: Removing And Replacing The A64 Tuner (Option 029)
1. Reverse the order of the removal procedure reusing the existing hardware. Torque all cable connectors to 10 in-lbs. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. 7-70 Keysight N5247B Service Guide...
Page 515 Figure 7-17 on page 38 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-31 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. Keysight N5247B Service Guide 7-71...
Page 516: Removing And Replacing The A70 Or A75 Low Frequency Extension (Lfe) Board
2. Remove the outer cover. Refer to “Removing the Covers” on page 7-6. 3. Position the analyzer bottom side up. 4. Remove the A23 test set motherboard. Refer to “Removing and Replacing the A23 Test Set Motherboard” on page 7-32. 7-72 Keysight N5247B Service Guide...
Page 517 Removing and Replacing the A70 or A75 Low Frequency Extension (LFE) Board 5. Disconnect the 8121-2919 and N5245-60005 ribbon cables. Refer to Figure 7-36 on page 7-73. Figure 7-36 Disconnect Ribbon Cables from Rear Panel Connectors (8121-2919, N5245-60005) Keysight N5247B Service Guide 7-73...
Page 518 Figure 7-37 on page 7-74. — For Version 7 Synthesizers, refer to Figure 7-38 on page 7-75. Figure 7-37 Version 6 Synthesizers: A70 4-Port LFE Board Remove Cables (8120-5014 (x2), 8120-5017 (x3), N5242-60079, N5242-60027, N5242-60080). 7-74 Keysight N5247B Service Guide...
Page 519 Repair and Replacement Procedures Removing and Replacing the A70 or A75 Low Frequency Extension (LFE) Board Figure 7-38 Version 7 Synthesizers: A70 4-Port LFE Board Remove Cables (8120-5014 (x2), 8120-5017 (x3), N5242-60079, N5242-60027, N5242-60080). Keysight N5247B Service Guide 7-75...
Page 520 Remove A71 bias combiner cable (N5240-60097) from “Port1” connector on the A70 LFE board N5240-60097 8. A70 LFE boards only: Remove port 3 bias combiner “RF IN” cable from the “Port3” connector on the LFE board. Similar to Figure 7-39 on page 7-76. 7-76 Keysight N5247B Service Guide...
Page 521 A74 port 2 bias combiner cable (N5240-60097) from “Port2” connector on the A70 LFE board 10. A70 LFE boards only: Remove port 4 bias combiner “RF IN” cable from the “Port4” connector on the LFE board. Similar to Figure 7-40 on page 7-77. Keysight N5247B Service Guide 7-77...
Page 522 Attach the new A70/A75 LFE board to the standoffs using the screws removed from the old one. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. 7-78 Keysight N5247B Service Guide...
Page 523: Removing And Replacing The A71-A74 Bias Tee Combiners
6. Remove two screws from the bias tee combiner and bracket-to-chassis  assembly to be removed (Do item only). Refer to Figure 7-43 on page 7-81.  Do not remove the bias combiner from the bracket yet (item is done in step Keysight N5247B Service Guide 7-79...
Page 524 Figure 7-43 on page 7-81, position the bias tees on the attenuator brackets as indicated. 3. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. 7-80 Keysight N5247B Service Guide...
Page 525 A71–A74 Bias Tee Combiners and Cables Removal. (N5222B Option 420 Shown. All Other PNA LFE Options are Similar. Figure 7-43 Remove Bias Combiner Bracket Assemblies from the Chassis (N5245-00036/N5245-00037, 0515-0372, 5087-7403, 0515-1227). (All Assemblies are Shown, but Only Remove the Defective Assembly.) Keysight N5247B Service Guide 7-81...
Page 526 Repair and Replacement Procedures Removing and Replacing the A71–A74 Bias Tee Combiners Figure 7-44 Remove DC Bias Cable from Bias Combiner (N5240-60091) Figure 7-45 Remove Bias Combiner, Cables, and Clamps (5023-3299, 5087-7403, 0515-2141, and N5240-60097 (x2)) -60097 7-82 Keysight N5247B Service Guide...
Page 527 Repair and Replacement Procedures Removing and Replacing the A71–A74 Bias Tee Combiners Figure 7-46 Mark Bias Combiner With a Permanent Marker Keysight N5247B Service Guide 7-83...
Page 528: Removing And Replacing The Rear Panel
11. Slide the rear panel over the cable connectors and off of the analyzer. Replacement Procedure 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. 7-84 Keysight N5247B Service Guide...
Page 529 Repair and Replacement Procedures Removing and Replacing the Rear Panel Figure 7-47 Rear Panel Removal Keysight N5247B Service Guide 7-85...
Page 530: Removing And Replacing The Front Panel Led Boards
6-71 on page 6-199. Replacement Procedure 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. 7-86 Keysight N5247B Service Guide...
Page 531 Repair and Replacement Procedures Removing and Replacing the Front Panel LED Boards This page intentionally left blank. Keysight N5247B Service Guide 7-87...
Page 532: Removing And Replacing The Fans
 c. Pull out the rivet completely (as shown by (item ) in the illustration) to release the fan and fan guard. Replacement Procedure 1. Reverse the order of the removal procedure. 7-88 Keysight N5247B Service Guide...
Page 533 Repair and Replacement Procedures Removing and Replacing the Fans 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. Figure 7-48 B1 Fan Removal Keysight N5247B Service Guide 7-89...
Page 534: Removing And Replacing The Lithium Battery
1. Reverse the order of the removal procedure following all instructions included with the new battery. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. 7-90 Keysight N5247B Service Guide...
Page 535 Repair and Replacement Procedures Removing and Replacing the Lithium Battery Figure 7-49 Lithium Battery Removal Keysight N5247B Service Guide 7-91...
Page 536: Post-Repair Procedures
No adjustment needed Front Panel Keypad and RPG Test A3 Display Test Chapter 4 A2 USB board No adjustment needed Check for proper operation A3 display assembly Touchscreen Adjustment and A3 Display Test Chapter 4 Verification 7-92 Keysight N5247B Service Guide...
Page 537 A9 Noise receiver board (Option “Noise Figure Adjustment Receiver Noise Figure Test Noise Jitter Test (Available with Option 029 with 029) S93029A/B Installed)” on Noise Receiver Linearity Test page 3-62 Noise State Calibration Coefficients Noise Receiver Compression Test Keysight N5247B Service Guide 7-93...
Page 538 Source Adjustment The Operator’s Check IF Gain Adjustment Receiver Characterization Receiver Adjustment IF Response Adjustment (Available Only with Option S93093/4A/B and or S93900/1/2/4/5/7A/B Installed) Restore option data (Refer to “Repairing and Recovering Option Data” Chapter 7-94 Keysight N5247B Service Guide...
Page 539 (Zipped) Folder. Email this zipped folder to csg.servicedesk@keysigh t.com with a note that it should be forwarded to PNA Customer Support. A16 SPAM board Noise Floor Test IF Gain Adjustment Receiver Characterization Trace Noise Test Keysight N5247B Service Guide 7-95...
Page 540 Reinstall the serial number. (Refer to “Installing or Changing a Serial Number” Chapter 8 Re-enable all hardware options. (Refer “Software Entitlement Certificate” Chapter 8 IF Gain Adjustment The Operator’s Check A24 IF multiplexer board Receiver Adjustment 7-96 Keysight N5247B Service Guide...
Page 541 IF Gain Adjustment Source Power Accuracy Test Receiver Characterization Source Maximum Power Receiver Adjustment Output Test IF Response Adjustment Source Power Linearity Test (Available Only with Option The Operator’s Check S93093/4A/B and or S93900/1/2/4/5/7A/B Installed) Keysight N5247B Service Guide 7-97...
Page 542 Source Adjustment Source Maximum Power A42–A45 bias tees IF Gain Adjustment Output Test Receiver Characterization Calibration Coefficients Test Receiver Adjustment Source Power Accuracy Test IF Response Adjustment (Available Only with Option S93093/4A/B and or S93900/1/2/4/5/7A/B Installed) 7-98 Keysight N5247B Service Guide...
Page 543 Source Power Accuracy Test Receiver Characterization Calibration Coefficients Test Receiver Adjustment Resetting the Mechanical IF Response Adjustment Counter (Available Only with Option S93093/4A/B and or S93900/1/2/4/5/7A/B Installed) Noise Figure Adjustment (Available with Option 029 with S93029A/B Installed) Keysight N5247B Service Guide 7-99...
Page 544 Receiver Adjustment Calibration Coefficients Test IF Response Adjustment The Operator’s Check (Available Only with Option S93093/4A/B and or S93900/1/2/4/5/7A/B Installed) Noise Figure Adjustment (Available with Option 029 with S93029A/B Installed) LFE Receiver Adjustment (Option 425) 7-100 Keysight N5247B Service Guide...
Page 545: Resetting The Mechanical Counter
— A keyboard and mouse must be connected to the network analyzer. 1. Click Utility > System > Service > Diagnostics > Mechanical Counter 2. In the Mechanical Cycle Counter window that opens: a. Click all of the items that apply. Keysight N5247B Service Guide 7-101...
Page 546: Eeprom Backup
The adjustments listed here generate new correction constants. The analyzer must have a backup of this new data in case any of the data becomes corrupted. To store the backup data, perform these steps: — Navigate to the EEPROM Backup Utility, located at: 7-102 Keysight N5247B Service Guide...
Page 547 — Run the program. — Click Backup EEPROM. — Click Backup TSMB Mem. — Click Backup Synth Mem. (Applies to Version 7 Synthesizers Only) — Click Exit when the program has finished. Figure 8 EEPROM Backup Menu Keysight N5247B Service Guide 7-103...
Page 548 Repair and Replacement Procedures Post-Repair Procedures 7-104 Keysight N5247B Service Guide...
Page 549: General Purpose Maintenance Procedures
Keysight Microwave Network Analyzers 2-Port and 4-Port PNA-X Service Guide General Purpose Maintenance Procedures Information in This Chapter Chapter Eight at-a-Glance Section Title Summary of Content Start Page Error Terms How to use error terms as a preventive maintenance and page 8-2 troubleshooting tool.
Page 550: Error Terms
You can use the error terms as a tool to isolate faulty assemblies in the signal separation group of your analyzer. You can compare the current values to preventive maintenance records or to the typical values listed in Table 8-1 on page 8-8. Keysight N5247B Service Guide...
Page 551: Performing Measurement Calibration
Figure 8-4 illustrate the error terms associated with measurement calibration for 1-port, 2-port, 3-port, and 4-port configurations respectively. Figure 8-1 Flowgraph of One-Port Error Terms for Port 1 where: E = Error term Subscript: D = Directivity Keysight N5247B Service Guide...
Page 552 R = Reflection Tracking X = Crosstalk (Isolation) L = Load Match T = Transmission Tracking 2nd Subscript: F = forward measurement (Ports 1 to Port 2) R = reverse measurement (Ports 2 to Port 1) Keysight N5247B Service Guide...
Page 553 For the case of a full 3-port calibration, port 1 has three Match error terms: S11 source match S12 load match S13 load match and three Tracking error terms: S11 reflection tracking S12 transmission tracking S13 transmission tracking There are six isolation terms not shown. Keysight N5247B Service Guide...
Page 554: Accessing Error Terms
Tracking error terms: S11 reflection tracking S12 transmission tracking S13 transmission tracking S12 transmission tracking There are eight isolation (crosstalk) terms not shown. Accessing Error Terms Error terms can be accessed either manually or programmatically: Manually Keysight N5247B Service Guide...
Page 555 You can access error terms by way of Component Object Model (COM) or Distributed Component Object Model (DCOM) software architecture. For more information on COM and DCOM, refer to the embedded help in the analyzer. Type in keyword “errors, systematic” in the index. Keysight N5247B Service Guide...
Page 556: Error Term Data
All crosstalk values are typical. Measurement conditions: normalized to a thru, measured with two shorts, 10 Hz IF bandwidth, averaging factor of 8, alternate mode, source power set to the lesser of the maximum power out or the maximum receiver power. Keysight N5247B Service Guide...
Page 557 2-port device. The match of test port cables is included in this response. Load match error terms are characterized by measuring the S and S responses of a “thru” configuration during the calibration procedure. Keysight N5247B Service Guide...
Page 558 After verifying the cable and its connections, suspect the analyzer switch splitter, step attenuator, coupler, or receivers, and associated cabling. To troubleshoot, refer to “Checking the Receiver Group” on page 4-52 or to “Checking the Signal Separation Group” on page 4-47. 8-10 Keysight N5247B Service Guide...
Page 559: Keysight License Manager
When the new certificate is redeemed for a license key file, the automated system will ask for the instrument's Host ID. Be sure to use the old Host ID that is associated with the old model number. Keysight N5247B Service Guide 8-11...
Page 560: Enabling Or Removing Options
224 - 2nd Src w/Combiner & Switches 423 - Combiner & Switches 3. Press and hold (or right click with a mouse) the option that you wish to either enable or remove, and then click Install or Delete, whichever is appropriate. 8-12 Keysight N5247B Service Guide...
Page 561: Repairing And Recovering Option Data
To change an incorrect serial number, it is necessary for your instrument to be connected directly to the LAN and to a Keysight IP network. Refer to “Contacting Keysight” on page 2-7. Keysight N5247B Service Guide 8-13...
Page 562: Firmware Upgrades
— Press UTILITY , then Service , then AgileUpdate System AgileUpdate compares the firmware revision currently installed in your network analyzer to the latest version available and assists you in downloading and installing the most recent version. 8-14 Keysight N5247B Service Guide...
Page 563: Operating System Recovery
Recovery” link on the Keysight PNA Series: Service & Support Home Page on the Internet. The URL for the Keysight PNA Series: Service & Support Home Page is: http://mktwww.srs.is.keysight.com/field/service/network/pna/ The URL for the Hard Drive Recovery page is: http://na.support.keysight.com/pna/hdrecovery.html Keysight N5247B Service Guide 8-15...
Page 564: Correction Constants
— Navigate to the EEPROM Backup Utility, located at: C:\Program Files (x86)\Keysight\Network Analyzer\Service\eebackup.exe — Run the program. — Click Backup EEPROM. — Click Backup TSMB Mem. — Click Exit when the program has finished. 8-16 Keysight N5247B Service Guide...
Page 565 Installation Note Xxxxx-xxxxx...
Page 566 This information is subject to change without notice. © Keysight Technologies 2011-2022 Edition 1, January 2022 N5247-90026 www.keysight.com...

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