Page 1 Keysight 2-Port and 4-Port PNA-L RF and Microwave Network Analyzers This manual provides documentation for the following models: N5231B (300 kHz - 13.5 GHz) N5232B (300 kHz - 20 GHz) N5239B (300 kHz - 8.5 GHz) Service Guide...
Page 2: Safety Notices
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 2011-2019 licenses are explicitly required...
Page 3: Table Of Contents
Instrument Specifications ..........3-7 Keysight N5231B/32B/39B Service Guide...
Page 4 Assembly Replacement Sequence ..........4-5 Keysight N5231B/32B/39B Service Guide...
Page 5 Configurable Test Set ........... 5-15 Keysight N5231B/32B/39B Service Guide...
Page 6 Bottom Assemblies, N5231B and N5232B, Option 400 ......6-31 Bottom Cables, N5231B and N5232B, Option 400 ......6-33 Bottom Ribbon Cables, N5231B and N5232B, Option 400 .
Page 7 Accessing the Keysight License Manager ........8-12 Keysight N5231B/32B/39B Service Guide...
Page 8 Storing Correction Constants ..........8-16 Keysight N5231B/32B/39B Service Guide...
Page 9 Contents Keysight N5231B/32B/39B Service Guide...
Page 10 Contents Keysight N5231B/32B/39B Service Guide...
Page 11: Safety And Regulatory Information
Keysight Microwave Network Analyzers and RF Network Analyzer 2-Port and 4-Port PNA-L 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 N5231B/32B/39B Service Guide...
Page 13: General Safety Considerations
Degree 2 per IEC 61010-1:2001 and 664 respectively. Do not operate the analyzer with the outer cover removed for more than 30 minutes, as this could cause the analyzer to overheat which could result in costly damage. Keysight N5231B/32B/39B 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 N5231B/32B/39B 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 N5231B/32B/39B Service Guide...
Page 16 Safety and Regulatory Information General Safety Considerations Figure 1-1 Location of Calibration Stickers on PNA Keysight N5231B/32B/39B 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 6-51 for part numbers. Keysight N5231B/32B/39B Service Guide...
Page 18 Safety and Regulatory Information Electrostatic Discharge Protection Figure 1-2 ESD Protection Setup Keysight N5231B/32B/39B Service Guide...
Page 19: Regulatory Information
This is a marking to indicate product compliance with the Canadian Interference-Causing ICES/NMB-001 Equipment Standard (ICES-001). Direct Current. IP 2 0 The instrument has been designed to meet the requirements of IP 2 0 for egress and operational environment. Keysight N5231B/32B/39B Service Guide...
Page 20 Forty years is the expected useful life of the product. This symbol on all primary or secondary packaging indicates compliance to China standard GB 18455-2001. South Korean Certification (KC) mark; includes the marking's identifier code which follows the format: MSIP-REM-YYY-ZZZZZZZZZZZZZZ or KCC-REM-YYY-ZZZZZZZZZZZZ. 1-10 Keysight N5231B/32B/39B Service Guide...
Page 21: General Product Information
Keysight Microwave Network Analyzers and RF Network Analyzer 2-Port and 4-Port PNA-L 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 22: Maintenance
Do not attempt to clean internally. Physical Maintenance Clean the cabinet, including the front panel, using a dry or slightly damp cloth only. Electrical Maintenance Refer to “Review the Principles of Connector Care” on page 3-5. Keysight N5231B/32B/39B Service Guide...
Page 23: Analyzer Options, Accessories, And Upgrades Available
Analyzer Options, Accessories, and Upgrades Available To see a list of the options, accessories, and upgrades available for the network analyzers, refer to the Keysight PNA Family Microwave Network Analyzers Configuration Guide, available online at http://literature.cdn.keysight.com/litweb/pdf/5990-7745EN.pdf. Keysight N5231B/32B/39B Service Guide...
Page 24: Required Service Test Equipment
The recommended model or part number for all equipment listed with a “P” in the Use column is required for proper operation of this test software. d. If an accurate measurement of the dynamic accuracy specification is not required, the E4418A or E4419A can be used. Keysight N5231B/32B/39B Service Guide...
Page 25 T-10 TORX driver 0.5, 0.8, and 1.0 N-m T, R (4, 7, and 9 in-lb) settings T-15 TORX driver 1.5 N-m (14 in-lb) setting T, R T-20 TORX driver 2.4 N-m (21 in-lb) setting T, R Keysight N5231B/32B/39B Service Guide...
Page 26 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 = , T = Troubleshooting, R = Repair, V = System verification Keysight N5231B/32B/39B Service Guide...
Page 27: Keysight Support, Services, And Assistance
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 28 Keysight in the same configuration as it was originally shipped. — Ship the analyzer using the original or comparable antistatic packaging materials. — Contact Keysight for instructions on where to ship your analyzer. Refer to “Contacting Keysight” on page 2-7. Keysight N5231B/32B/39B Service Guide...
Page 29: Tests And Adjustments
Keysight Microwave Network Analyzers and RF Network Analyzer 2-Port and 4-Port PNA-L 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 30 Source Power Accuracy Test — Source Maximum Power Output Test Source Power Linearity Test — Frequency Accuracy Test — — Trace Noise Test — Receiver Compression Test — Noise Floor Test — Calibration Coefficients Test — Dynamic Accuracy Test Keysight N5231B/32B/39B Service Guide...
Page 31 IF Response Adjustment (Available Only with Option S93093/4A and or S93900/1/2/4/5/7A Installed) a. These performance tests are included in the analyzer’s firmware for Option S93898A. b. These are included in the analyzer’s firmware on all models and options. Keysight N5231B/32B/39B Service Guide...
Page 32: 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 N5231B/32B/39B Service Guide...
Page 33: Allow The Analyzer To Warm Up
— Use correct end of calibration block — Gage all connectors before first use Making Connections — Align connectors carefully Do Not — Apply bending force to connection — Make preliminary connection contact — Over tighten preliminary connection lightly Keysight N5231B/32B/39B Service Guide...
Page 34 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 N5231B/32B/39B Service Guide...
Page 35: About System Verification And Performance Tests
This alternative verifies both the system specifications and the instrument specifications for the analyzer. Instrument Specifications The analyzer's instrument specifications are described in the “N523xA Data Sheet and Technical Specifications,” available online at http://literature.cdn.keysight.com/litweb/pdf/N5235-90004.pdf. Keysight N5231B/32B/39B Service Guide...
Page 36: System Verification Procedure
Figure 3-2 on page 3-11. 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 37 Keysight Technologies service office to verify only a subset of the specifications. However, this “limited calibration” creates the possibility of making inaccurate measurements if you then use the analyzer in an application requiring additional capabilities. Keysight N5231B/32B/39B Service Guide...
Page 38: 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 N5231B/32B/39B Service Guide...
Page 39: 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 N5231B/32B/39B Service Guide 3-11...
Page 40: 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 N5231B/32B/39B Service Guide...
Page 41 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. Figure 3-3 Operator’s Check Dialog Box Keysight N5231B/32B/39B Service Guide 3-13...
Page 42 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. 3-14 Keysight N5231B/32B/39B Service Guide...
Page 43 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. Keysight N5231B/32B/39B Service Guide 3-15...
Page 44 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. 3-16 Keysight N5231B/32B/39B Service Guide...
Page 45 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 Keysight N5231B/32B/39B Service Guide 3-17...
Page 46 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 3-18 Keysight N5231B/32B/39B Service Guide...
Page 47 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. Keysight N5231B/32B/39B Service Guide 3-19...
Page 48 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. 3-20 Keysight N5231B/32B/39B Service Guide...
Page 49: 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: Keysight N5231B/32B/39B Service Guide 3-21...
Page 50: 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. 3-22 Keysight N5231B/32B/39B Service Guide...
Page 51: 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 Keysight N5231B/32B/39B Service Guide 3-23...
Page 52 If the system verification is performed with a non-Keysight cable, ensure that the cable meets or exceeds the specifications for the test cable specified in the previous table, “Equipment Used in the System Verification Procedure.” Refer to the cable’s user’s guide for specifications. 3-24 Keysight N5231B/32B/39B Service Guide...
Page 53 5. Under Printer Output, click one of the following options. Refer to Figure 3-10. — Print Tabular Data: Prints the verification data in tabular form which includes measured data and uncertainty limits. For an example, refer to Figure 3-12 on page 3-28. Keysight N5231B/32B/39B Service Guide 3-25...
Page 54 4. If the analyzer still fails the test, check the measurement calibration by viewing the error terms as described in “Accessing Error Terms” on page 8-6. 5. Refer to Figure 3-11 for additional troubleshooting steps. 3-26 Keysight N5231B/32B/39B Service Guide...
Page 55 At the top of the printed output is the name of the device, the serial number of the device, and the date tested. Each S-parameter measurement result is printed with frequency tested, lower and upper limit lines, the measured data, and the result of the test. Keysight N5231B/32B/39B Service Guide 3-27...
Page 56 Tests and Adjustments System Verification Figure 3-12 Example of Printed Tabular Verification Results 3-28 Keysight N5231B/32B/39B Service Guide...
Page 57 — 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. Keysight N5231B/32B/39B Service Guide 3-29...
Page 58 Tests and Adjustments System Verification Figure 3-13 Example of Printed Graphical Verification Results 3-30 Keysight N5231B/32B/39B Service Guide...
Page 59: Performance Tests
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 N5231B/32B/39B Service Guide 3-31...
Page 60: Source Maximum Power Output Test
7. The power level at this point is measured and compared to the maximum output power specification. 8. This process is repeated at hundreds of frequencies across the analyzer’s full range in every specified path configuration. If the Analyzer Fails this Test: 3-32 Keysight N5231B/32B/39B Service Guide...
Page 61: Source Power Linearity Test
“Source Adjustment” on page 3-43 and repeat this test. — If the analyzer still fails this test, troubleshoot the source section of the analyzer and then repeat this test. Refer to “Checking the Source Group” on page 4-36. Keysight N5231B/32B/39B Service Guide 3-33...
Page 62: Frequency Accuracy Test
Function of the Test: To measure the stability of a signal in the internal source and receiver system of your analyzer. Specification Tested: Test Port Input–Trace Noise Magnitude and Trace Noise Phase Equipment Used: A test cable. 3-34 Keysight N5231B/32B/39B Service Guide...
Page 63: Receiver Compression Test
Function of the Test: To measure the compression at the analyzer’s specified maximum power level for the receivers. Specification Tested: Test Port Input–Maximum Test Port Input Level Equipment Used: — U3070AK01 or Z5623A Option K01 Compression Test Set — Power meter — Power sensors Keysight N5231B/32B/39B Service Guide 3-35...
Page 64 13.The magnitude and phase measurements using the receiver under test are read: (Pd). 14.The compression for each point is calculated as (Pa–Pb) – (Pd–Pc). If the Analyzer Fails this Test: — Run the Receiver Characterization adjustment, and repeat this test. 3-36 Keysight N5231B/32B/39B Service Guide...
Page 65: Noise Floor Test
8. The test cable is removed and loads are connected to both ports. 9. A CW linear measurement sweep is measured for each test point. The receiver test power level, Ptest, in dBm is calculated for each point from the mean of each sweep. Keysight N5231B/32B/39B Service Guide 3-37...
Page 66: Calibration Coefficients Test
6. This process is repeated for Ports 3 and 4 on 4-port analyzers. If the Analyzer Fails this Test: — Failure of the directivity error term is often due to a faulty test port coupler. Replace the coupler and repeat this test. 3-38 Keysight N5231B/32B/39B Service Guide...
Page 67: Dynamic Accuracy Test
Replacement Procedures.” for instructions on replacing the suspected faulty component or assembly. Dynamic Accuracy Test This description applies to all N522xB, N5231B/32B/34B/35B/39B, and N5247B instruments. Function of the Test: To measure the relative power linearity of the analyzer’s receivers.
Page 68 (QuintBrick)” on page 7-32. — If the analyzer still fails this test, replace the A9 SPAM board and repeat this test. Refer to “Removing and Replacing the A4, A7, A9, and A10 Boards” on page 7-19. 3-40 Keysight N5231B/32B/39B Service Guide...
Page 69: Adjustments
Step 4. When the User Account Control opens, press Yes. Step 5. After pressing all of the cross hair calibration points a Digitizer Calibration Tool window opens, press Yes. Step 6. In the Tablet PC Settings window, press OK. Keysight N5231B/32B/39B Service Guide 3-41...
Page 70: 10 Mhz Frequency Reference Adjustment
This adjustment typically adjusts to within ±0.01 ppm. 1. Connect the equipment as shown in Figure 3-14. Connect a GPIB cable between the network analyzer and the frequency counter. Figure 3-14 Equipment Setup for the 10 MHz Frequency Reference Adjustment 3-42 Keysight N5231B/32B/39B Service Guide...
Page 71: Synthesizer Bandwidth Adjustment
Power sensor, 3.5 mm E4413A 8485A Adapter, 3.5 mm (f) to 3.5 mm (f) 83059B 85052-60012 Procedure 1. Connect the equipment as shown in Figure 3-15. Connect a GPIB cable between the network analyzer and the power meter. Keysight N5231B/32B/39B Service Guide 3-43...
Page 72: If Gain Adjustment
3. The same cable is connected between test port 1 and test port 2, as shown in Figure 3-18, and a signal from Port 1 is used to adjust the “B” receiver at Port 2. 3-44 Keysight N5231B/32B/39B Service Guide...
Page 73 RF Cable, 3.5 mm (f) to 3.5 mm (f) 85131C 85131E Procedure 1. Connect the equipment as shown in Figure 3-16. Connect a GPIB cable between the network analyzer and the power meter. Figure 3-16 Equipment Setup 1 for the Receiver Adjustment Keysight N5231B/32B/39B Service Guide 3-45...
Page 74 3. Ensure the GPIB settings are correct. 4. Follow the instructions and prompts as they are displayed. Figure 3-17 Equipment Setup 2 for the Receiver Adjustment Figure 3-18 Equipment Setup 3 for the Receiver Adjustment 3-46 Keysight N5231B/32B/39B Service Guide...
Page 75: Ee Default Adjustment
Procedure Service Adjustment Routines 1. Press UTILITY System , then , then , then click IF Response Adjustment. 2. Follow the instructions and prompts as they are displayed. Keysight N5231B/32B/39B Service Guide 3-47...
Page 76 Tests and Adjustments Adjustments 3-48 Keysight N5231B/32B/39B Service Guide...
Page 77: Troubleshooting
Keysight Microwave Network Analyzers and RF Network Analyzer 2-Port and 4-Port PNA-L 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 78: Chapter Four At-A-Glance
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 Softkey firmware. Menu Item This represents an item in a drop-down or pop-up menu. Keysight N5231B/32B/39B Service Guide...
Page 79: Operating The Analyzer With Covers Removed
Operating the Analyzer With Covers Removed Operating the Analyzer With Covers Removed Do not operate the analyzer with the outer cover removed for more than 30 minutes, as this could cause the analyzer to overheat which could result in costly damage. Keysight N5231B/32B/39B Service Guide...
Page 80: Protect Against Electrostatic Discharge (Esd)
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 N5231B/32B/39B Service Guide...
Page 81: Assembly Replacement Sequence
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 N5231B/32B/39B Service Guide...
Page 82: 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 83 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 N5231B/32B/39B Service Guide...
Page 84: Power Up Troubleshooting
— If the line switch glows green and the fans are operating (audible), but the display remains dark, go to “Troubleshooting LCD Display Problems” on page 4-15. — If the instrument appears to abort the network analyzer measurement interface process, contact Keysight. Refer to “Contacting Keysight” on page 2-7. Keysight N5231B/32B/39B Service Guide...
Page 85: 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 A15 midplane board. Refer to Table 4-1 on page 4-11 for the correct voltages. Keysight N5231B/32B/39B Service Guide...
Page 86 Failure to do so can result in personal injury or loss of life. Do not operate the analyzer with the outer cover removed for more than 30 minutes, as this could cause the analyzer to overheat which could result in costly damage. 4-10 Keysight N5231B/32B/39B Service Guide...
Page 87 If the missing supply voltages return to a “power on” condition after removal of an assembly, suspect that assembly as being defective. Remove the network analyzer assemblies in the order specified in the following steps (refer to Chapter 7 for removal instructions). Keysight N5231B/32B/39B Service Guide 4-11...
Page 88 You should be able to determine if the shorted condition has changed. Isolate the remaining three assemblies: — remove the A17 CPU board — remove the A16 power supply 4-12 Keysight N5231B/32B/39B Service Guide...
Page 89 A14 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. Keysight N5231B/32B/39B Service Guide 4-13...
Page 90 Troubleshooting Power Up Troubleshooting Figure 4-3 Fan Power Cable Connections (Right Side of Analyzer) Figure 4-4 Fan Power Cable Connections (Left Side of Analyzer) 4-14 Keysight N5231B/32B/39B Service Guide...
Page 91: Troubleshooting Lcd Display Problems
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 Keysight N5231B/32B/39B Service Guide 4-15...
Page 92: Front Panel Troubleshooting
Diagnostics Press UTILITY , then , then , then Service System Front Panel Test A Front Panel Key Test Utility dialog box will be displayed, as shown in Figure 4-5. 4-16 Keysight N5231B/32B/39B Service Guide...
Page 93 7-12. To replace the A1 front panel interface board, refer to “Removing the A1 Front Panel Interface Board and Keypad Assembly” on page 7-11. — To close the Key Label window and return to the instrument display, press Preset three times. Keysight N5231B/32B/39B Service Guide 4-17...
Page 94 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. 4-18 Keysight N5231B/32B/39B Service Guide...
Page 95: A3 Display Test
If the display is dark, refer to “Removing the A3 Display Assembly and the Touchscreen” on page 7-13 and to “Removing the Touchscreen Controller Board” on page 7-12. Keysight N5231B/32B/39B Service Guide 4-19...
Page 96: 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. 4-20 Keysight N5231B/32B/39B Service Guide...
Page 97: A1 Front Panel Interface Board
A1 Front Panel Interface Board and Keypad Assembly” on page 7-11 and to “Removing the Speaker Assembly” on page 7-13. Checking the Operation of the Key Pad Commands To verify the key pad functionality, refer to “Front Panel Keypad and RPG Test” on page 4-16. Keysight N5231B/32B/39B Service Guide 4-21...
Page 98 Troubleshooting Front Panel Troubleshooting Checking the Display To verify the display functionality, refer to “A3 Display Test” on page 4-19. 4-22 Keysight N5231B/32B/39B Service Guide...
Page 99: Rear Panel Troubleshooting
, then System Configure SICL/GPIB... 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. Keysight N5231B/32B/39B Service Guide 4-23...
Page 100: 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. 4-24 Keysight N5231B/32B/39B Service Guide...
Page 101 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. Keysight N5231B/32B/39B Service Guide 4-25...
Page 102 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. 4-26 Keysight N5231B/32B/39B Service Guide...
Page 103 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. Keysight N5231B/32B/39B Service Guide 4-27...
Page 104 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. 4-28 Keysight N5231B/32B/39B Service Guide...
Page 105 Troubleshooting Rear Panel Troubleshooting Figure 4-7 Construction of a Crossover Cable Keysight N5231B/32B/39B Service Guide 4-29...
Page 106: Measurement System Troubleshooting
2-7. EEPROM Headers The network analyzer application uses the firmware revision information stored in the pc board header EEPROM. If the information stored in any EEPROM is incorrect, the network analyzer may not operate properly. 4-30 Keysight N5231B/32B/39B Service Guide...
Page 107: Verifying The A, B, C, D, And R Traces (Standard S-Parameter Mode)
The first step is to verify that the A, B,C, D, and R traces are present and that they are approximately level: — Connect an Open or Short standard from a mechanical calibration kit to each test port (use adapters if necessary). Keysight N5231B/32B/39B Service Guide 4-31...
Page 108 — For 4-port analyzer models, traces A, B, C, D, and R are displayed in five separate data windows as shown in Figure 4-10. Identifying discrepancies of the traces in these windows can help you to isolate the faulty assembly. 4-32 Keysight N5231B/32B/39B Service Guide...
Page 109 — If any of the traces are not present, are noisy or distorted, or are at an incorrect level, then there is a problem with the analyzer’s measurement system. Proceed to “Where to Begin Troubleshooting.” Keysight N5231B/32B/39B Service Guide 4-33...
Page 110: Where To Begin Troubleshooting
Properties in the resulting pop-up menu. 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. 4-34...
Page 111 Single Trace (A, B, C, D, or R) Only If the trace is missing in all bands or has notches or roll-off, go to “Checking the Signal Separation Group” on page 4-40. Keysight N5231B/32B/39B Service Guide 4-35...
Page 112: Checking The Source Group
Too many sections!Equipment Used for This Check Equipment Type Model or Alternate Model or Part Number Part Number Power meter E4418B/E4419B E4418A/E4419A Power sensor, 3.5 mm N8485A 8485A Adapter, 3.5 mm (f) to 3.5 mm (f) 83059B 85052-60012 4-36 Keysight N5231B/32B/39B Service Guide...
Page 113 6. If the 50 MHz signals are present, reconnect the cables, and then: — for LO related problems, continue testing at “Checking the A10 13.5 GHz LO Synthesizer Output”. — for source related problems, continue testing at “Checking the A4 Synthesizer Outputs” on page 4-38. Keysight N5231B/32B/39B Service Guide 4-37...
Page 114 Refer to “Removing and Replacing the A4, A7, A9, and A10 Boards” on page 7-19. 7. If the signal is present, reconnect cable W1 and then continue with “Checking the Signal Separation Group”. 4-38 Keysight N5231B/32B/39B Service Guide...
Page 115 — W45 for Port 2 of analyzers with Option 416 (includes source attenuators) — W46 for Port 3 of analyzers with Option 416 (includes source attenuators) — W47 for Port 4 of analyzers with Option 416 (includes source attenuators) Keysight N5231B/32B/39B Service Guide 4-39...
Page 116: Checking The Signal Separation Group
The measurement results will help you isolate a faulty assembly. The output of the R receiver cannot be measured because it would necessitate breaking the phase lock loop, causing all of the signals to be lost. 4-40 Keysight N5231B/32B/39B Service Guide...
Page 117 For all of the following checks, refer to the block diagrams at the end of this chapter and to any of the following that are appropriate: — “Bottom Assemblies, N523xA, Option 200” on page 6-19 Keysight N5231B/32B/39B Service Guide 4-41...
Page 118: Checking The Receiver Group
“Bottom Assemblies, N523xA, Option 216” on page 6-25 — “Bottom Cables, N523xA, Option 216” on page 6-27 — “Bottom Assemblies, N5231B and N5232B, Option 400” on page 6-31 — “Bottom Cables, N5231B and N5232B, Option 400” on page 6-33 —...
Page 119 Measurement System Troubleshooting — “Bottom Cables, N523xA, Option 216” on page 6-27 — “Bottom Assemblies, N5231B and N5232B, Option 400” on page 6-31 — “Bottom Cables, N5231B and N5232B, Option 400” on page 6-33 — “Bottom Assemblies, N5231B and N5232B, Option 416” on page 6-37 —...
Page 120 4. The measured signal on the spectrum analyzer should be at 7.61 MHz. 5. If the measured signal is missing on any receiver, replace the A24 mixer brick. Refer to “Removing and Replacing the A24 Mixer Brick (QuintBrick)”. 4-44 Keysight N5231B/32B/39B Service Guide...
Page 121: Instrument Block Diagrams Sheet 1
Troubleshooting Instrument Block Diagrams Sheet 1 Instrument Block Diagrams Sheet 1 Microwave PNA, N523xB, 2-port Model Keysight N5231B/32B/39B Service Guide 4-45...
Page 122 N5231B/32B/39B 2-Port Overall Block Diagram Includes Options 200-Standard; 216-Configurable Test Set and Source Attenuators DISPLAY USB BD Service Guide: N5232-90026 A9 SIGNAL PROCESSING A24 MIXER BRICK (QuintBrick) OPTION 200 IF = 16 - 18 MHz for CW Freq < 7.5 MHz ADC MODULE (SPAM) IF = 0.826 MHz for CW Freq >...
Page 123: Instrument Block Diagrams Sheet 2
Troubleshooting Instrument Block Diagrams Sheet 2 Instrument Block Diagrams Sheet 2 Microwave PNA, N523xB, 4-port Model Keysight N5231B/32B/39B Service Guide 4-47...
Page 124 N5231B/32B-Port Overall Block Diagram (IncludesOptions400-Standard;416-Configurable Test Set and Source Attenuator) DISPLAY USB BD Service Guide: N5232-90026 A9 SIGNAL PROCESSING A24 MIXER BRICK (QuintBrick) OPTION 400 IF = 16 - 18 MHz for CW Freq < 7.5 MHz ADC MODULE (SPAM) IF = 0.826 MHz for CW Freq >...
Page 125: Theory Of Operation
Keysight Microwave Network Analyzers and RF Network Analyzer 2-Port and 4-Port PNA-L Service Guide Theory of Operation Information in This Chapter This chapter provides a general description of the operating theory of the N523xA 2-port and 4-port PNA microwave network analyzers. —...
Page 126: Network Analyzer System Operation
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 N5231B/32B/39B Service Guide...
Page 127: 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 N5231B/32B/39B Service Guide...
Page 128 “Receiver Group Operation” on page 5-19. 1. For frequency ranges and maximum output power levels, refer to the section “Test Port Output” in the online Keysight document, “N523xA Data Sheet and Technical Specifications.” See the hyperlink above. Keysight N5231B/32B/39B Service Guide...
Page 129 “Digital Processing and Digital Control Group Operation” on page 5-22. 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 5-27. Keysight N5231B/32B/39B Service Guide...
Page 130: Synthesized Source Group Operation
LO signal is normally 5.785 MHz higher than the test signal. Since the A4 and A10 13.5 GHz synthesizer boards each receive their 50 MHz input reference signal from the exact same source, frequency drift error is eliminated. Keysight N5231B/32B/39B Service Guide...
Page 131 Theory of Operation Synthesized Source Group Operation Figure 5-3 2-Port Source Group Keysight N5231B/32B/39B Service Guide...
Page 132 Theory of Operation Synthesized Source Group Operation Figure 5-4 4-Port Source Group Keysight N5231B/32B/39B Service Guide...
Page 133: A4 And A10 13.5 Ghz Synthesizer Boards
In bands 1–9, the output of the swept VCO is passed directly or through a divide-by-2, 4, or 8 circuit to produce the output frequencies as listed in Table 5-1. Keysight N5231B/32B/39B Service Guide...
Page 134: A20 Massquad (4-Port Models)
10 MHz reference signal for the A9 signal processing ADC module (SPAM) board. The VCO output is also divided by two to produce 50 MHz reference signals for the A4 and A10 13.5 GHz synthesizer boards. 5-10 Keysight N5231B/32B/39B Service Guide...
Page 135: A19 Test Set Motherboard
Connector settings can be changed using SCPI and COM commands. The settings are not accessible from the front panel. Table 5-3 on page 5-14 PWR I/O A DB-9 female connector. Pin assignments are listed in Keysight N5231B/32B/39B Service Guide 5-11...
Page 136 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 5-12 Keysight N5231B/32B/39B Service Guide...
Page 137 TTL out, latched, indicates pass fail (programmable polarity) +5 V +5 Vdc, 100 mA max. Sweep End TTL out, active low (10 μs min) indicates sweep done Pass/Fail Write TTL out, active low pass/fail write strobe (1 μs min) Strobe Keysight N5231B/32B/39B Service Guide 5-13...
Page 138 Analog input: ±10 V @ 1.22 mV typical resolution Rin > 1 M-ohm BW ≈ 1 MHz ADC conversion time < 1 us typical Power Button Open collector input Active low replicates power button key press. 5-14 Keysight N5231B/32B/39B Service Guide...
Page 139: Signal Separation Group Operation
— the A20 MASSQuad and the A28 test port 4 bridge coupler 2-port models: — the A25 test port 1 bridge coupler and the A24 mixer brick receiver A — the A28 test port 2 bridge coupler and the A24 mixer brick receiver B Keysight N5231B/32B/39B Service Guide 5-15...
Page 140: A25 And A28 Test Port Couplers
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 over the full frequency range. 5-16 Keysight N5231B/32B/39B Service Guide...
Page 141 Theory of Operation Signal Separation Group Operation Figure 5-6 4-Port Signal Separation Group Keysight N5231B/32B/39B Service Guide 5-17...
Page 142: A29-A30 60 Db Step Attenuators
They are electro-mechanical step attenuators that provide 0 to 60 dB of attenuation in 5-dB steps. They adjust the power level to the DUT without changing the level of the incident power in the reference path. These attenuators are controlled by the A17 CPU board. 5-18 Keysight N5231B/32B/39B Service Guide...
Page 143: Receiver Group Operation
The processed and formatted data is finally routed to the display, and to the general-purpose interface bus (GPIB) for remote operation. Refer to “Digital Processing and Digital Control Group Operation” on page 5-22 for more information on signal processing. Keysight N5231B/32B/39B Service Guide 5-19...
Page 144 Theory of Operation Receiver Group Operation Figure 5-8 4-Port Receiver Group 5-20 Keysight N5231B/32B/39B Service Guide...
Page 145 Theory of Operation Receiver Group Operation Figure 5-9 2-Port Receiver Group Keysight N5231B/32B/39B Service Guide 5-21...
Page 146: Digital Processing And Digital Control Group Operation
A1 Front Panel Interface Board — A2 USB Board — A3 Display Assembly — Keypad Assembly — Data Acquisition and Processing Subgroup — A9 SPAM Board (Digital Description) — A17 CPU Board — A51 Solid State Drive 5-22 Keysight N5231B/32B/39B Service Guide...
Page 147 Theory of Operation Digital Processing and Digital Control Group Operation Figure 5-10 Digital Processing and Digital Control Group Keysight N5231B/32B/39B Service Guide 5-23...
Page 148: Front Panel Subgroup
The video data received from the A17 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 5-24 Keysight N5231B/32B/39B Service Guide...
Page 149: 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. Keysight N5231B/32B/39B Service Guide 5-25...
Page 150 (IDE) data storage device which is connected directly to, and physically mounted within the enclosure of, the A17 CPU board. The full operating system and firmware for the network analyzer is stored on the A51 solid state drive. 5-26 Keysight N5231B/32B/39B Service Guide...
Page 151: 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. Keysight N5231B/32B/39B Service Guide 5-27...
Page 152 Theory of Operation Power Supply Group Operation 5-28 Keysight N5231B/32B/39B Service Guide...
Page 153: 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 provide the location of the replaceable parts in page 6-6 your analyzer by type of part: —...
Page 154: 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 155: 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 N5231B/32B/39B Service Guide...
Page 156: 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 N5231B/32B/39B Service Guide...
Page 157 Replaceable Parts Rebuilt-Exchange Assemblies Figure 6-1 Module Exchange Procedure Keysight N5231B/32B/39B Service Guide...
Page 158: Replaceable Parts Listings
Signal processing ADC module (SPAM) board 13.5 GHz LO synthesizer board Not used Not used Not used System motherboard Midplane board Power supply assembly “Internal Hardware and Miscellaneous Parts, All Models” on CPU board page 6-45 GPIB board Keysight N5231B/32B/39B Service Guide...
Page 159 Table 6-2 on Source 60 dB step attenuator page 6-8. Source 60 dB step attenuator (Option 216 only) A31 - A50 Not used Solid state drive assembly (SSDA) “Internal Hardware and Miscellaneous Parts, All Models” on page 6-45 Keysight N5231B/32B/39B Service Guide...
Page 160 “Bottom Assemblies, N5231B and N5232B, Option 400” on page 6-31 — “Bottom Cables, N5231B and N5232B, Option 400” on page 6-33 — “Bottom Ribbon Cables, N5231B and N5232B, Option 400” on page 6-35 — “Bottom Assemblies, N5231B and N5232B, Option 416” on page 6-37 —...
Page 161 ESD Supplies on page 6-51 — EMI/RFI Shielding Accessories on page 6-51 — Upgrade Kits and Accessories on page 6-51 — Rack Mount Kits and Handle Kits on page 6-52 — Touch-up Paint on page 6-52 Keysight N5231B/32B/39B Service Guide...
Page 162: Front Panel Assembly, Front Side, All Options
Trim, bottom, goes on the outside, underneath the Front Frame frame ( (All PNA models) 0515-1946 Machine screw, M3.0 x 6 mm flat head (To attach lower dress panel overlay frame to chassis.) Not Shown N5242-00048 Guard, jumper cables, side—2-Port & 4-Port 6-10 Keysight N5231B/32B/39B Service Guide...
Page 163 Replaceable Parts Listings Reference Part Number Description Designator 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 N5231B/32B/39B Service Guide 6-11...
Page 164: 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) 6-12 Keysight N5231B/32B/39B Service Guide...
Page 165 Cable, A3 LED Driver board (Backlight converter board) to interface board N5242-60074 Power switch cable N5071-61660 Wire assembly, RPG (to attach RPG board (N5240-60083) to Interface board (J10) Figure 6-3 Front Panel Assembly, Back Side, All Options Keysight N5231B/32B/39B Service Guide 6-13...
Page 166 Replaceable Parts Replaceable Parts Listings Figure 6-4 A3 Display Assembly with Interface Board/USB Assemblies Figure 6-5 A3 Display Assembly with LCD Display 2090-1092 (LED) and Side Brackets 6-14 Keysight N5231B/32B/39B Service Guide...
Page 167: Top Assemblies, All Models
13.5 GHz source synthesizer board Was N5242-60150 N5240-60069 Frequency reference board N5240-60077 Signal processing ADC module (SPAM) board Was N5240-60056 N5240-60074 13.5 GHz LO synthesizer board Was N5242-60150 N5230-60133 System motherboard W1312-60095 Midplane board 0950-4934 Power supply assembly Keysight N5231B/32B/39B Service Guide 6-15...
Page 168 Replaceable Parts Replaceable Parts Listings Figure 6-6 Top Assemblies, All Models 6-16 Keysight N5231B/32B/39B Service Guide...
Page 169: Top Cables, All Models
A7 frequency reference board J5 to A10 13.5 GHz LO Synthesizer board J5 N5242-60029 A7 frequency reference board J6 to A4 13.5 GHz Source Synthesizer board J5 a. SR = semirigid coaxial cable; F = flexible coaxial cable. Keysight N5231B/32B/39B Service Guide 6-17...
Page 170 Replaceable Parts Replaceable Parts Listings Figure 6-7 Top Cables, All Models 6-18 Keysight N5231B/32B/39B Service Guide...
Page 171: Bottom Assemblies, N523Xa, Option 200
Test port 2 bridge coupler ① N5240-60058 Front-panel LED board a. The 2-port PNA A24 mixer brick (5087-7831) contains only four receivers. The 4-port PNA A24 mixer brick (5087-7823) contains five receivers. These items are NOT interchangeable. Keysight N5231B/32B/39B Service Guide 6-19...
Page 172 Replaceable Parts Replaceable Parts Listings Figure 6-8 Bottom Assemblies, N523xA, Option 200 6-20 Keysight N5231B/32B/39B Service Guide...
Page 173: Bottom Cables, N523Xa, Option 200
A19 test set motherboard J5 to A21 MASSY J5 N5235-60024 A19 test set motherboard J3 to A21 MASSY J3 ① 1250-4261 Load, 50 ohm, SMA (installed on QuintBrick) Was: 1810-0118 a. SR = semirigid coaxial cable; F = flexible coaxial cable. Keysight N5231B/32B/39B Service Guide 6-21...
Page 174 Replaceable Parts Replaceable Parts Listings Figure 6-9 Bottom Cables, N523xA, Option 200 6-22 Keysight N5231B/32B/39B Service Guide...
Page 175: Bottom Ribbon Cables, N523Xa, Option 200
A14 system motherboard J1 to A19 test set motherboard J1 ➆ 8121-0834 Rear-panel HANDLER I/O to A19 test set motherboard J400 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness. Keysight N5231B/32B/39B Service Guide 6-23...
Page 176 Replaceable Parts Replaceable Parts Listings Figure 6-10 Bottom Ribbon Cables, N523xA, Option 200 6-24 Keysight N5231B/32B/39B Service Guide...
Page 177: Bottom Assemblies, N523Xa, Option 216
Test port 2 source 60 dB step attenuator ① N5240-60058 Front-panel LED board a. The 2-port PNA A24 mixer brick (5087-7831) contains only four receivers. The 4-port PNA A24 mixer brick (5087-7823) contains five receivers. These items are NOT interchangeable. Keysight N5231B/32B/39B Service Guide 6-25...
Page 178 Replaceable Parts Replaceable Parts Listings Figure 6-11 Bottom Assemblies, N523xA, Option 216 6-26 Keysight N5231B/32B/39B Service Guide...
Page 179: Bottom Cables, N523Xa, Option 216
A19 test set motherboard J5 to A21 MASSY J5 N5235-60024 A19 test set motherboard J3 to A21 MASSY J3 ➀ 1250-4261 Load, 50 ohm, SMA (installed on QuintBrick) Was: 1810-0118 a. SR = semirigid coaxial cable; F = flexible coaxial cable. Keysight N5231B/32B/39B Service Guide 6-27...
Page 180 Replaceable Parts Replaceable Parts Listings Figure 6-12 Bottom Cables, N523xA, Option 216 6-28 Keysight N5231B/32B/39B Service Guide...
Page 181: Bottom Ribbon Cables, N523Xa, Option 216
A14 system motherboard J1 to A19 test set motherboard J1 ➈ 8121-0834 Rear-panel HANDLER I/O to A19 test set motherboard J400 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness. Keysight N5231B/32B/39B Service Guide 6-29...
Page 182 Replaceable Parts Replaceable Parts Listings Figure 6-13 Bottom Ribbon Cables, N523xA, Option 216 6-30 Keysight N5231B/32B/39B Service Guide...
Page 183: Bottom Assemblies, N5231B And N5232B, Option 400
Replaceable Parts Replaceable Parts Listings Bottom Assemblies, N5231B and N5232B, Option 400 Reference Part Number Description Designator N5230-60134 Test set motherboard 5087-7762 MASSQuad (Multiplier/amplifier/switch/splitter assembly) Mixer brick (QuintBrick) 5087-7823 critical footnote Was 5087-7761 5087-7752 Test port 1 bridge coupler Test port 2 bridge coupler...
Page 184 Replaceable Parts Replaceable Parts Listings Figure 6-14 Bottom Assemblies, N5231B and N5232B, Option 400 6-32 Keysight N5231B/32B/39B Service Guide...
Page 185: Bottom Cables, N5231B And N5232B, Option 400
Replaceable Parts Replaceable Parts Listings Bottom Cables, N5231B and N5232B, Option 400 Reference Part Number Description Type Designator Refer to “Top Cables, All Models” on page 6-17. Refer to “Top Cables, All Models” on page 6-17. N5232-20081 A24 mixer brick LO In to test set deck cable bracket...
Page 186 Replaceable Parts Replaceable Parts Listings Figure 6-15 Bottom Cables, N5231B and N5232B, Option 400 6-34 Keysight N5231B/32B/39B Service Guide...
Page 187: Bottom Ribbon Cables, N5231B And N5232B, Option 400
Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables, N5231B and N5232B, Option 400 Reference Part Number Description Type Designator ➀ N5242-60005 Rear-panel PWR I/O to A19 test set motherboard J301 ➁ N5225-60001 A19 test set motherboard J12 to ports 1/2 LED board J1 ➂...
Page 188 Replaceable Parts Replaceable Parts Listings Figure 6-16 Bottom Ribbon Cables, N5231B and N5232B, Option 400 6-36 Keysight N5231B/32B/39B Service Guide...
Page 189: Bottom Assemblies, N5231B And N5232B, Option 416
Replaceable Parts Replaceable Parts Listings Bottom Assemblies, N5231B and N5232B, Option 416 Reference Part Number Description Designator N5230-60134 Test set motherboard 5087-7762 MASSQuad (Multiplier/amplifier/switch/splitter assembly) Mixer brick (QuintBrick) 5087-7823 critical footnote Was 5087-7761 5087-7752 Test port 1 bridge coupler Test port 2 bridge coupler...
Page 190 Replaceable Parts Replaceable Parts Listings Figure 6-17 Bottom Assemblies, N5231B and N5232B, Option 416 6-38 Keysight N5231B/32B/39B Service Guide...
Page 191: Bottom Cables, N5231B And N5232B, Option 416
Replaceable Parts Replaceable Parts Listings Bottom Cables, N5231B and N5232B, Option 416 Reference Part Number Description Type Designator Refer to “Top Cables, All Models” on page 6-17. Refer to “Top Cables, All Models” on page 6-17. N5232-20081 A24 mixer brick LO In to test set deck cable bracket...
Page 192 Replaceable Parts Replaceable Parts Listings Figure 6-18 Bottom Cables, N5231B and N5232B, Option 416 6-40 Keysight N5231B/32B/39B Service Guide...
Page 193: Bottom Ribbon Cables, N5231B And N5232B, Option 416
Replaceable Parts Replaceable Parts Listings Bottom Ribbon Cables, N5231B and N5232B, Option 416 Reference Part Number Description Type Designator ➀ N5242-60005 Rear-panel PWR I/O to A19 test set motherboard J301 ➁ N5225-60001 A19 test set motherboard J12 to ports 1/2 LED board J1 ➂...
Page 194 Replaceable Parts Replaceable Parts Listings Figure 6-19 Bottom Cables, N5231B and N5232B, Option 416 6-42 Keysight N5231B/32B/39B Service Guide...
Page 195: Bottom Hardware And Miscellaneous Parts
0515-0374 Machine screw, M3.0 x 10, pan head (to attach test set support bracket from test set wall to test set base) 0515-0430 Machine screw M3.0 x 6 pan head (to attach: QuintBrick to deck) Keysight N5231B/32B/39B Service Guide 6-43...
Page 196 Replaceable Parts Replaceable Parts Listings Figure 6-20 Bottom Hardware and Miscellaneous Parts, All Options 6-44 Keysight N5231B/32B/39B Service Guide...
Page 197: Internal Hardware And Miscellaneous Parts, All Models
0515-1946 Machine screw M3.0 x 6, flat head (to attach power supply bracket to power supply assy) Keysight N5231B/32B/39B Service Guide 6-45...
Page 198 The A51 solid state disk drive for the 2.2 GHz CPU board plugs into the A17 CPU board assembly from the rear panel. Refer “Removing and Replacing the A17 CPU Board” on page 7-27 for an illustration. Figure 6-21 Internal Hardware and Miscellaneous Parts, All Models 6-46 Keysight N5231B/32B/39B Service Guide...
Page 199: External Hardware And Miscellaneous Parts, All Models
Machine screw, M4.0 x 10 flat head (to attach: front handles to front frame; front frame to chassis) a. Refer to “Rack Mount Kits and Handle Kits” on page 6-52 for part numbers of complete rack mount kits. Keysight N5231B/32B/39B Service Guide 6-47...
Page 200 Replaceable Parts Replaceable Parts Listings Figure 6-22 External Hardware and Miscellaneous Parts, All Models 6-48 Keysight N5231B/32B/39B Service Guide...
Page 201: Rear Panel Assembly, All Models
Miscellaneous Parts, All Models” on page 6-45 for the part number. 0515-0372 Machine screw, M3.0 x 8, pan head (to secure: rear panel; rear panel power supply bracket; CPU board; handler i/o cable to rear panel;) Keysight N5231B/32B/39B Service Guide 6-49...
Page 202: Miscellaneous Part Numbers
Service Guide. (Not available in printed form. Part number is for reference only. Must be printed N5232-90001 from the Keysight Web site.) Protective Caps for Connectors Protective cap for GPIB connector and GPIB Talker/Listener connector 1252-5007 6-50 Keysight N5231B/32B/39B Service Guide...
Page 203 9170-1702 Upgrade Kits and Accessories To see a list of the upgrade kits and accessories available for the network analyzers, refer to the Keysight PNA Family Microwave Network Analyzers Configuration Guide, available online at http://literature.cdn.keysight.com/litweb/pdf/5990-7745EN.pdf. Keysight N5231B/32B/39B Service Guide 6-51...
Page 204 Titanium (for use on cover) 6010-3329 a. For rack mount use, you must replace factory installed ruggedized handles (thick aluminum, no trim) with classic handles (thin aluminum with plastic trim), included with Option 1CP. 6-52 Keysight N5231B/32B/39B Service Guide...
Page 205: Repair And Replacement Procedures
2-Port and 4-Port PNA-L 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 206: 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 N5231B/32B/39B Service Guide...
Page 207: 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 N5231B/32B/39B Service Guide...
Page 208: Assembly Replacement Sequence
Step 3. Replace the faulty assembly and determine what adjustments are necessary. Refer to “Post-Repair Procedures” in this chapter. Step 4. Perform the necessary adjustments. Refer to Chapter 3, “Tests and Adjustments.” Step 5. Perform the necessary performance tests. Refer to Chapter 3, “Tests and Adjustments.” Keysight N5231B/32B/39B Service Guide...
Page 209: Removal And Replacement Procedures
60 dB source step attenuator page 7-34 60 dB source step attenuator (Option 216 only) Solid state drive assembly (SSDA) page 7-35 Rear panel page 7-36 Front Panel LED boards page 7-37 Fans page 7-39 Battery page 7-41 Keysight N5231B/32B/39B Service Guide...
Page 210 Repair and Replacement Procedures Removal and Replacement Procedures This page intentionally left blank. Keysight N5231B/32B/39B Service Guide...
Page 211: 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 N5231B/32B/39B Service Guide...
Page 212 Repair and Replacement Procedures Removing the Covers Figure 7-1 Outer and Inner Cover Removal Keysight N5231B/32B/39B Service Guide...
Page 213: 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 7-43. Keysight N5231B/32B/39B Service Guide...
Page 214 Repair and Replacement Procedures Removing and Replacing the Front Panel Assembly Figure 7-2 Front Panel Assembly Removal 7-10 Keysight N5231B/32B/39B Service Guide...
Page 215: 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 Keysight N5231B/32B/39B Service Guide 7-11...
Page 216 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. 7-12 Keysight N5231B/32B/39B Service Guide...
Page 217 10.With a T-6 TORX (set to 3-in-lb), remove the 2 screws (item 23) on the 2nd side bracket (item [21]). During re-assembly of the side brackets to the LCD display, it is very important to avoid over-tightening. Keysight N5231B/32B/39B Service Guide 7-13...
Page 218 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 7-14 Keysight N5231B/32B/39B Service Guide...
Page 219 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 Keysight N5231B/32B/39B Service Guide 7-15...
Page 220 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 7-16 Keysight N5231B/32B/39B Service Guide...
Page 221 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 Keysight N5231B/32B/39B Service Guide 7-17...
Page 222 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 7-43. 7-18 Keysight N5231B/32B/39B Service Guide...
Page 223: Removing And Replacing The A4, A7, A9, And A10 Boards
Align these ejectors with the slots in the chassis inner panels as the board is lowered into position and then push them down flat. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-43. Keysight N5231B/32B/39B Service Guide 7-19...
Page 224 The fractional-N synthesizer boards will not perform correctly and will cause the PNA to display errors until the Synthesizer Bandwidth Adjustment and the EE Default Adjustment are completed, as per Table 7-2 on page 7-43. 7-20 Keysight N5231B/32B/39B Service Guide...
Page 225: Removing And Replacing The A14 System Motherboard
13.Turn the analyzer over so that the bottom side is up and remove the A19 Test Set Motherboard. Refer to “Removing and Replacing the A19 Test Set Motherboard” on page 7-29. Disconnect the ribbon cable from the A14 System Motherboard. Keysight N5231B/32B/39B Service Guide 7-21...
Page 226 20.Lift the A14 system motherboard out 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 7-43. 7-22 Keysight N5231B/32B/39B Service Guide...
Page 227 Repair and Replacement Procedures Removing and Replacing the A14 System Motherboard Figure 7-10 A14 System Motherboard Removal Keysight N5231B/32B/39B Service Guide 7-23...
Page 228: Removing And Replacing The A15 Midplane Board
8. Lift the A15 midplane board out of the analyzer. Replacement Procedure 1. Reverse the order of the removal procedure. Be careful to align the guide pins on the A15 midplane board connectors with the slots on the A14 system motherboard connectors. 7-24 Keysight N5231B/32B/39B Service Guide...
Page 229 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 7-43. Keysight N5231B/32B/39B Service Guide 7-25...
Page 230: Removing And Replacing The A16 Power Supply Assembly
5. Slide out and remove the A16 power supply assembly. 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 7-43. 7-26 Keysight N5231B/32B/39B Service Guide...
Page 231: Removing And Replacing The A17 Cpu Board
“Removing and Replacing the A51 Solid State Drive (SSD)” on page 7-35. 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 7-43. Keysight N5231B/32B/39B Service Guide 7-27...
Page 232: Removing And Replacing The A18 Gpib Board
6. Slide the A18 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 7-43. 7-28 Keysight N5231B/32B/39B Service Guide...
Page 233: Removing And Replacing The A19 Test Set 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 7-43. Keysight N5231B/32B/39B Service Guide 7-29...
Page 234: Removing And Replacing The A20 Massquad
6. Remove the A20 MASSQuad from the analyzer. Observe the CAUTION above. 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 7-43. 7-30 Keysight N5231B/32B/39B Service Guide...
Page 235: Removing And Replacing The A21 Massy
6. Remove the A21 MASSY from the analyzer. Observe the CAUTION above. 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 7-43. Keysight N5231B/32B/39B Service Guide 7-31...
Page 236: Removing And Replacing The A24 Mixer Brick (Quintbrick)
6. Remove the A24 mixer brick from the analyzer. Observe the CAUTION above. 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 7-43. 7-32 Keysight N5231B/32B/39B Service Guide...
Page 237: Removing And Replacing The A25-A28 Test Port Bridge Couplers
1. Reverse the order of the removal procedure. 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 7-43. Keysight N5231B/32B/39B Service Guide 7-33...
Page 238: Removing And Replacing The A29 And A30 60 Db Source Step Attenuators
1. Reverse the order of the removal procedure using the existing attenuator ribbon cable. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-43. 7-34 Keysight N5231B/32B/39B Service Guide...
Page 239: Removing And Replacing The A51 Solid State Drive (Ssd)
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 N5231B/32B/39B Service Guide 7-35...
Page 240: Removing And Replacing The Rear Panel
7. 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 7-43. 7-36 Keysight N5231B/32B/39B Service Guide...
Page 241: Removing And Replacing The Front Panel Led Boards
LED board from 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 7-43. Keysight N5231B/32B/39B Service Guide 7-37...
Page 242 Repair and Replacement Procedures Removing and Replacing the Front Panel LED Boards This page intentionally left blank. 7-38 Keysight N5231B/32B/39B Service Guide...
Page 243: Removing And Replacing The Fans
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 7-43. Keysight N5231B/32B/39B Service Guide 7-39...
Page 244 Repair and Replacement Procedures Removing and Replacing the Fans Figure 7-11 Fan Removal 7-40 Keysight N5231B/32B/39B Service Guide...
Page 245: 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 7-43. Keysight N5231B/32B/39B Service Guide 7-41...
Page 246 Repair and Replacement Procedures Removing and Replacing the Lithium Battery Figure 7-12 Lithium Battery Removal 7-42 Keysight N5231B/32B/39B Service Guide...
Page 247: Post-Repair Procedures
EE Default Adjustment (select LO Synthesizer) The Operator’s Check Synthesizer Bandwidth Source Power Accuracy Test Adjustment Source Adjustment IF Gain Adjustment Receiver Adjustment IF Response Adjustment (Available Only with Option S93093/4A and or S93900/1/2/4/5/7A Installed) Keysight N5231B/32B/39B Service Guide 7-43...
Page 248 (Refer to “Enabling or Removing Options” Chapter A21 MASSY Source Adjustment Source Power Accuracy Test IF Gain Adjustment The Operator’s Check Receiver Adjustment IF Response Adjustment (Available Only with Option S93093/4A and or S93900/1/2/4/5/7A Installed) 7-44 Keysight N5231B/32B/39B Service Guide...
Page 249 This adjustment is intended for Keysight personnel only and requires a password to run. b. Synthesizer Bandwidth Adjustment is only required, when the EE Default Adjustment is not sufficient. c. Synthesizer Bandwidth Adjustment is only required, when the EE Default Adjustment is not sufficient. Keysight N5231B/32B/39B Service Guide 7-45...
Page 250 If a backup copy of receiver calibration data from the faulty disk drive is available, it can be copied to the new disk drive. If not, new data must be generated by performing the “Receiver Adjustment.” 7-46 Keysight N5231B/32B/39B Service Guide...
Page 251: General Purpose Maintenance Procedures
Keysight Microwave Network Analyzers and RF Network Analyzer 2-Port and 4-Port PNA-L 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 252: 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 N5231B/32B/39B Service Guide...
Page 253: 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 N5231B/32B/39B Service Guide...
Page 254 R = Reflection Tracking X = Crosstalk (Isolation) L = Load Match T = Transmission Tracking 2nd Subscript: F = forward measurement (Port 1 to Port 2) R = reverse measurement (Port 2 to Port 1) Keysight N5231B/32B/39B Service Guide...
Page 255 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 N5231B/32B/39B Service Guide...
Page 256: 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 N5231B/32B/39B Service Guide...
Page 257 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 N5231B/32B/39B Service Guide...
Page 258: Error Term Data
S reflection of the calibration kit load. The load has a much better return loss specification than does the uncorrected test port. Therefore, any power detected from this measurement is assumed to be from directivity error. Keysight N5231B/32B/39B Service Guide...
Page 259 Typical Cause of Failure The calibration kit load or a bad “thru” cable is the most common cause of load match specification failure. Keysight N5231B/32B/39B Service Guide...
Page 260 All transmission measurements are affected by transmission tracking errors. Typical Cause of Failure The test port cable is the most common cause of transmission tracking specification failure. If the test port cable performance has been independently verified, suspect the following: 8-10 Keysight N5231B/32B/39B Service Guide...
Page 261 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 4-42 or to “Checking the Signal Separation Group” on page 4-40. Keysight N5231B/32B/39B Service Guide 8-11...
Page 262: 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. 8-12 Keysight N5231B/32B/39B Service Guide...
Page 263: Enabling Or Removing Options
Install or Delete, whichever is appropriate. Repairing and Recovering Option Data For information on repairing or recovering option data, refer to Keysight License Manager help on your instrument. Keysight N5231B/32B/39B Service Guide 8-13...
Page 264: Installing Or Changing A Serial Number
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. 8-14 Keysight N5231B/32B/39B Service Guide...
Page 265: Firmware Upgrades
— Press UTILITY > System > Service > AgileUpdate. 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. Keysight N5231B/32B/39B Service Guide 8-15...
Page 266: Operating System Recovery
— Navigate to the EEPROM Backup Utility, located at: C:\Program Files\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 N5231B/32B/39B Service Guide...
Page 267 6-16 troubleshooting troubleshooting 4-40 4-42 4-39 operation 5-24 A29 60 dB source step A21 MASSY part number 6-15 attenuator illustrated 6-37 6-20 6-26 removal and replacement illustrated 6-26 6-38 operation 5-10 procedure 7-21 operation 5-18 Keysight N5231B/32B/39B Service Guide...
Page 268 6-15 6-48 display assembly removal and replacement part numbers 6-47 5-24 procedure 7-19 removal and replace- front panel interface accessories ment board analyzer 5-24 external replaceable parts in operator’s check front panel subgroup 3-12 illustrated 6-48 Keysight N5231B/32B/39B Service Guide...
Page 269 See top assembly 6-30 procedure GPIB bottom assembly, option 400 part numbers rebuilt-exchange program 6-51 replaceable assemblies in bottom assembly, option illustrated 6-32 replacement 6-21 replaceable cables 6-33 cautions about illustrated 6-22 illustrated 6-34 Keysight N5231B/32B/39B Service Guide...
Page 270 6-45 cross-over cable, LAN configurable test set 4-27 5-16 care of connectors high dynamic range caution measurement 5-16 certificate of calibration normal configuration changing D receiver measurement 5-16 a serial number 8-14 troubleshooting 4-31 connectors Keysight N5231B/32B/39B Service Guide...
Page 271 6-48 directivity error terms part numbers cause of failure 6-47 access to definition of external monitor 4-15 via COM/DCOM com- measurements affected by mands disabling via front panel options 8-13 via SCPI commands failure Keysight N5231B/32B/39B Service Guide...
Page 272 6-10 in internal hardware front panel illustrated 6-11 6-45 assembly, removal and part number 6-10 port 5-26 replacement operation 5-24 removal and replace- illustrated 7-10 overlay ment procedure 7-28 illustrated 6-11 CONTROLLER part number 6-10 Keysight N5231B/32B/39B Service Guide...
Page 273 8-11 illustrated 6-20 6-26 6-32 adjustment definition of 3-47 8-11 6-38 insertion loss measurements affected by removal and replacement check 8-11 procedure 7-37 failure of 3-17 License Manager,Keysight test port cables 3-15 option enable 8-12 Keysight N5231B/32B/39B Service Guide...
Page 274 8-16 measurement service and support operation calibration software 8-13 13.5 GHz synthesizer configuration ordering information boards high dynamic range options and upgrades configurable test set 5-15 replaceable parts 5-16 CPU board 5-25 output power normal 5-16 Keysight N5231B/32B/39B Service Guide...
Page 275 EXT 10 MHz REF IN source maximum See A16 5-11 power switch power out- GPIB 5-26 board 3-32 HANDLER I/O parts list 5-11 6-12 source power accura- overlay 5-26 3-31 part number TEST SET I/O 6-10 5-11 Keysight N5231B/32B/39B Service Guide...
Page 276 6-51 semi-rigid dynamic accuracy test 3-39 ribbon cables functional description of See cables, RF See cables, ribbon & wire replaceable parts harness in front panel assembly functional group rivets illustrated group 6-13 in internal hardware Keysight N5231B/32B/39B Service Guide...
Page 277 See A29 & A30 IF gain 3-44 tools SPAM board IF response part numbers 3-47 6-50 See A9 receiver calibration required speaker troubleshooting warnings 4-16 3-44 specifications warranty source calibration Keysight N5231B/32B/39B Service Guide...
Page 278 3-31 4-15 4-16 insertion loss failure A10 13.5 GHz LO receiver compression 3-35 synthesizer board source power linearity 4-38 3-17 3-33 A16 power supply test port output power TEST SET I/O assembly linearity connector 3-33 Keysight N5231B/32B/39B Service Guide...
Page 279 4-23 power supply check troubleshooting 5-26 4-16 USB board rear panel 4-23 front panel rear-panel USB 4-23 illustrated 6-13 receiver A 4-31 4-40 warm up removal and replacement receiver B 4-31 4-40 Keysight N5231B/32B/39B Service Guide...
Page 280 Windows Keysight N5231B/32B/39B Service Guide...
Page 281 Installation Note Xxxxx-xxxxx...
Page 282 This information is subject to change without notice. © Keysight Technologies 2011-2019 Edition 2, June 2019 N5232-90026 www.keysight.com...

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