Keysight Technologies N5221A Service Manual
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Keysight Technologies N5221A Service Manual

Keysight Technologies N5221A Service Manual

2-port and 4-port pna microwave network analyzers, 10 mhz to 13.5 / 26.5 ghz
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Keysight
2-Port and 4-Port
PNA Microwave Network Analyzers
This manual provides documentation for the
following models:
N5221A (10 MHz to 13.5 GHz)
N5222A (10 MHz to 26.5 GHz)
Service Guide

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Summary of Contents for Keysight Technologies N5221A

  • Page 1 Keysight 2-Port and 4-Port PNA Microwave Network Analyzers This manual provides documentation for the following models: N5221A (10 MHz to 13.5 GHz) N5222A (10 MHz to 26.5 GHz) Service Guide...

  • Page 2: Safety Notices

    COVERING THE MATERIAL IN THIS DOCUMENT THAT CONFLICT WITH government requirements THESE TERMS, THE WARRANTY beyond those set forth in the © Keysight Technologies, Inc. TERMS IN THE SEPARATE EULA shall apply, except to the 2011-2017 AGREEMENT WILL CONTROL. extent that those terms, rights, or...

  • Page 3: Table Of Contents

    System Specifications ........... 3-7 Keysight N5221A/22A Service Guide...
  • Page 4 Assembly Replacement Sequence ..........4-5 Keysight N5221A/22A Service Guide...
  • Page 5 Microwave PNA, N5221A/22A ........
  • Page 6 Miscellaneous Part Numbers ..........6-104 Keysight N5221A/22A Service Guide...
  • Page 7 Error Terms ............. . . 8-2 Keysight N5221A/22A Service Guide...
  • Page 8 Storing Correction Constants ..........8-17 Keysight N5221A/22A Service Guide...
  • Page 9 Contents Keysight N5221A/22A Service Guide...
  • Page 10 Contents Keysight N5221A/22A Service Guide...

  • Page 11: Safety And Regulatory Information

    Keysight Microwave Network Analyzers 2-Port and 4-Port PNA Series 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 N5221A/22A Service Guide...

  • Page 13: General Safety Considerations

    If unstable power levels are expected, the analyzer input power must be buffered by a line conditioner. This product is designed for use in Installation Category II and Pollution Degree 2 per IEC 61010-1:2001 and 664 respectively. Keysight N5221A/22A 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 N5221A/22A 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 N5221A/22A Service Guide...
  • Page 16 Safety and Regulatory Information General Safety Considerations Figure 1-1 Location of Calibration Stickers on PNA Keysight N5221A/22A 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 “Miscellaneous Part Numbers” on page 6-104 for part numbers. Keysight N5221A/22A Service Guide...
  • Page 18 Safety and Regulatory Information Electrostatic Discharge Protection Figure 1-2 ESD Protection Setup Keysight N5221A/22A 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 N5221A/22A Service Guide...

  • Page 20: Lithium Battery Disposal

    If the battery on the A17 CPU board assembly needs to be disposed of, dispose of it in accordance with your country’s requirements. If required, you may return the battery to Keysight Technologies for disposal. Refer to “Contacting Keysight” on page 2-7 for assistance.

  • Page 21: General Product Information

    Keysight Microwave Network Analyzers 2-Port and 4-Port PNA Series Service Guide General Product Information Information in This Chapter Chapter Two at-a-Glance Section Title Summary of Content Start Page Maintenance Cleaning instructions for the external surfaces of your page 2-2 analyzer. Information about electrical maintenance of your analyzer.

  • Page 22: 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 N5221A/22A Service Guide...

  • Page 23: 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 Pulse I/O Adapter Keysight N5221A/22A 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 N5221A/22A Service Guide...
  • Page 25 (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 1/4 inch and 5/16 inch open-end Thin profile 8710-0510 A, R wrench Keysight N5221A/22A 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 = Adjustments, T = Troubleshooting, R = Repair, V = System verification Keysight N5221A/22A Service Guide...

  • Page 27: Keysight Support, Services, And Assistance

    — R1282A Return to Keysight Calibration Plan The analyzer is delivered with a one-year calibration certificate. Options are available to have Keysight Technologies provide three or five year calibration coverage (perform the annual calibration two or four times). Options for basic calibration or ISO/IEC 17025 or ANSI/NCSL Z540.3–2006 standards compliant calibrations are available.

  • Page 28: 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: —...

  • Page 29: Tests And Adjustments

    Keysight Microwave Network Analyzers 2-Port and 4-Port PNA Series Service Guide Tests and Adjustments Information in This Chapter This chapter contains procedures to help you check, verify, and adjust your PNA. — The checks verify the operation of the assemblies in your analyzer. —...
  • Page 30 Performance Tests — 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 N5221A/22A Service Guide...
  • Page 31 IF Response Adjustment (Option 090, 093, or 094 Only) a. These performance tests are included in the analyzer’s firmware for Options 897 and 898. b. These adjustments are included in the analyzer’s firmware on all models and options. Keysight N5221A/22A 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 N5221A/22A 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 N5221A/22A 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 N5221A/22A Service Guide...

  • Page 35: About System Verification And Performance Tests

    — Complete all of the performance tests using a certified calibration kit that will be used for future measurements. This alternative verifies both the system specifications and the instrument specifications for the analyzer. Keysight N5221A/22A Service Guide...

  • Page 36: Instrument Specifications

    An illustrated outline of the performance verification procedure: — for ANSI/NCSL Z540.3-2006 and ISO/IEC 17025 verification, is shown in Figure 3-1 on page 3-10. — for non-standards verification, is shown in Figure 3-2 on page 3-11. Keysight N5221A/22A Service Guide...

  • Page 37: 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 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 Z5240.3–2006 and ISO/IEC 17025 Verification Flowchart 1. Stop only in case of a catastrophic failure or cable connector damage 3-10 Keysight N5221A/22A 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 N5221A/22A 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 N5221A/22A 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 N5221A/22A Service Guide 3-13...

  • Page 42: 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. 3-14 Keysight N5221A/22A 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 N5221A/22A 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 N5221A/22A 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 N5221A/22A 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 N5221A/22A 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 N5221A/22A 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 N5221A/22A 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 N5221A/22A 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 N5221A/22A 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 N5221A/22A 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 N5221A/22A 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 N5221A/22A 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 N5221A/22A 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 N5221A/22A Service Guide 3-27...
  • Page 56 Tests and Adjustments System Verification Figure 3-12 Example of Printed Tabular Verification Results 3-28 Keysight N5221A/22A 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 N5221A/22A Service Guide 3-29...
  • Page 58 Tests and Adjustments System Verification Figure 3-13 Example of Printed Graphical Verification Results 3-30 Keysight N5221A/22A 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 N5221A/22A 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 N5221A/22A Service Guide...

  • Page 61: Source Power Linearity Test

    “Source Adjustment” on page 3-42 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 4-34. Keysight N5221A/22A 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 N5221A/22A 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 N5221A/22A 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 N5221A/22A 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 N5221A/22A 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 N5221A/22A Service Guide...

  • Page 67: Dynamic Accuracy Test

    5. The analyzer’s receiver measurement is retrieved and compared with a perfect sine wave. Any deviation is due to receiver non-linearity. 6. The test set’s output attenuator is changed in 5 dB steps from 0 to 60 dB, and this measurement is repeated. Keysight N5221A/22A Service Guide 3-39...
  • Page 68 “Removing and Replacing the A23 and A24 Mixer Bricks” on page 7-37. — If the analyzer still fails this test, replace the A12 SPAM board and repeat this test. Refer to “Removing and Replacing the A4–A13 Boards” on page 7-15. 3-40 Keysight N5221A/22A Service Guide...

  • Page 69: Adjustments

    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 3-14. Connect a GPIB cable between the network analyzer and the frequency counter. Keysight N5221A/22A Service Guide 3-41...

  • Page 70: Synthesizer Bandwidth Adjustment

    Equipment Used for the Source Adjustment Equipment Type Model or Alternate Model or Part Number Part Number Power meter E4418B/E4419B E4418A/E4419A Power sensor, 3.5 mm E4413A 8485A Adapter, 3.5 mm (f) to 3.5 mm (f) 83059B 85052-60012 3-42 Keysight N5221A/22A Service Guide...

  • Page 71: If Gain Adjustment

    2. Follow the instructions and prompts as they are displayed. Receiver Characterization This characterizes the receivers in your analyzer. Procedure 1. Press UTILITY , then Service , then Adjustments , then click System Receiver Characterization. Keysight N5221A/22A Service Guide 3-43...

  • Page 72: Receiver Adjustment

    83059B 85052-60012 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. 3-44 Keysight N5221A/22A Service Guide...
  • Page 73 , then , then click Service Adjustments System Receiver Adjustment. 3. Ensure the GPIB settings are correct. 4. Follow the instructions and prompts as they are displayed. Figure 3-17 Equipment Setup 2 for the Receiver Adjustment Keysight N5221A/22A Service Guide 3-45...

  • Page 74: Ee Default Adjustment

    Procedure Service Adjustments 1. Press UTILITY , then , then , then click IF System Response Adjustment. 2. Follow the instructions and prompts as they are displayed. 3-46 Keysight N5221A/22A Service Guide...

  • Page 75: Troubleshooting

    Keysight Microwave Network Analyzers 2-Port and 4-Port PNA Series Service Guide Troubleshooting Information in This Chapter The information in this chapter helps you: — Identify the portion of the analyzer at fault. — Locate the specific troubleshooting procedure to identify the assembly or peripheral at fault.

  • Page 76: Chapter Four At-A-Glance

    This represents a “hardkey”, a key that is physically located on the instrument. Hardkey 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 N5221A/22A Service Guide...

  • Page 77: 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 N5221A/22A Service Guide...

  • Page 78: 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 N5221A/22A Service Guide...

  • Page 79: 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 N5221A/22A Service Guide...

  • Page 80: 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 81 Troubleshooting Getting Started with Troubleshooting Figure 4-1 Troubleshooting Organization Flowchart “Power Up Go to Troubleshooting” “Front Panel Go to Troubleshooting” “Rear Panel Go to Troubleshooting” “Measurement Go to System Troubleshooting” Keysight N5221A/22A Service Guide...

  • Page 82: 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 4-14. — If the instrument appears to abort the network analyzer measurement interface process, contact Keysight. Refer to “Contacting Keysight” on page 2-7. Keysight N5221A/22A Service Guide...

  • Page 83: 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 4-2 on page 4-11 for the correct voltages. Keysight N5221A/22A Service Guide...
  • Page 84 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 N5221A/22A Service Guide...
  • Page 85 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 N5221A/22A Service Guide 4-11...
  • Page 86 To further isolate the failure in the three remaining assemblies, measure the resistance (with the power turned off) from the power supply test points to either ACOM or DCOM. Make sure that the only assemblies plugged in are the four minimum required assemblies listed above. 4-12 Keysight N5221A/22A Service Guide...
  • Page 87 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 N5221A/22A Service Guide 4-13...

  • Page 88: 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. 4-14 Keysight N5221A/22A Service Guide...
  • Page 89 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 N5221A/22A Service Guide 4-15...

  • Page 90: Front Panel Troubleshooting

    Press UTILITY , then , then , then Service More Front Panel Test System A Front Panel Key Test Utility dialog box will be displayed, as shown in Figure 4-4. 4-16 Keysight N5221A/22A Service Guide...
  • Page 91 “Removing the A1 Front Panel Interface Board and Keypad Assembly” on page 7-10. Table 4-2 Front Panel Keyboard Key Names TRACE/CHAN RESPONSE ENTRY ENTRY Keys Keys Keys Keys (Cont’d) Trace 1 Meas Trace 2 Format Cancel Enter Trace 3 Scale Help . (decimal point) Keysight N5221A/22A Service Guide 4-17...
  • Page 92 3. If the movement of numbers is not smooth or no numbers appear at all, suspect a faulty A1 front panel interface board. To replace the A1 front panel interface board, refer to “Removing the A1 Front Panel Interface Board and Keypad Assembly” on page 7-10. 4-18 Keysight N5221A/22A Service Guide...

  • Page 93: A3 Display Test

    — If the device performs correctly, the USB board is functioning properly. — If the device does not perform correctly, the USB board is faulty. Refer to “Removing the A2 USB Board” on page 7-10. Keysight N5221A/22A Service Guide 4-19...

  • Page 94: A1 Front Panel Interface Board

    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. Checking the Display To verify the display functionality, refer to “A3 Display Test” on page 4-19. 4-20 Keysight N5221A/22A Service Guide...

  • Page 95: 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 N5221A/22A Service Guide 4-21...

  • Page 96: 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. 4-22 Keysight N5221A/22A Service Guide...
  • Page 97 Configure Control Panel... 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 N5221A/22A Service Guide 4-23...
  • Page 98 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. 4-24 Keysight N5221A/22A Service Guide...
  • Page 99 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 N5221A/22A Service Guide 4-25...
  • Page 100 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. 4-26 Keysight N5221A/22A Service Guide...
  • Page 101 Troubleshooting Rear Panel Troubleshooting Figure 4-5 Construction of a Crossover Cable Keysight N5221A/22A Service Guide 4-27...

  • Page 102: Measurement System Troubleshooting

    , then Help . Verify that the information displayed in this screen is correct for About NA... your analyzer. If any of the information is incorrect, contact Keysight Technologies. Refer to “Contacting Keysight” on page 2-7. 4-28 Keysight N5221A/22A Service Guide...

  • Page 103: Verifying The A, B, C, D, And R Traces (Standard S-Parameter Mode)

    A19 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: Keysight N5221A/22A Service Guide 4-29...
  • Page 104 — For 4-port analyzer models, traces A, B, C, D, R1, R2, R3, and R4 are displayed in eight separate data windows as shown in Figure 4-8. Identifying discrepancies of the traces in these windows can help you to isolate the faulty assembly. 4-30 Keysight N5221A/22A Service Guide...

  • Page 105: 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 Keysight N5221A/22A Service Guide 4-31...
  • Page 106 Address box, click the down arrow and then click My Computer. In an open area of the My Computer window, click the right mouse button and then click Properties in the resulting pop-up menu. 4-32 Keysight N5221A/22A Service Guide...
  • Page 107 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 108: 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, 2.4 mm E8487A None Adapter, 2.4 mm (f) to 2.4 mm (f) 11900B 85056-60007 4-34 Keysight N5221A/22A Service Guide...
  • Page 109 — for LO related problems, continue testing at “Checking the A11 13.5 GHz LO Synthesizer Output”. — for source related problems, continue testing at “Checking the A4 and A13 Source Synthesizer Outputs” on page 4-37. Keysight N5221A/22A Service Guide 4-35...
  • Page 110 For analyzers with DSP version 4.0, the signal is 7.61 MHz above the network analyzer setting. For analyzers with DSP version 5.0, the signal is 7.44 MHz above the network analyzer setting. 4-36 Keysight N5221A/22A Service Guide...
  • Page 111 2. Disconnect W1 or W2 from J1207. 3. Connect the spectrum analyzer to J1207. 4. Set the network analyzer for a 800 MHz CW frequency and observe the spectrum analyzer measurement. The spectrum analyzer should measure a signal at 800 MHz. Keysight N5221A/22A Service Guide 4-37...
  • Page 112 Refer to “Removing and Replacing the A4–A13 Boards” on page 7-15. 7. If the signal is present, reconnect all cables, and then continue with “Checking the Signal Separation Group” on page 4-39. 4-38 Keysight N5221A/22A Service Guide...

  • Page 113: Checking The Signal Separation Group

    Adapter, 3.5 mm (f) to 3.5 mm (f) 83059B 85052-60012 Equipment Setup 1. Before starting these checks, zero and calibrate the power meter. (See the power meter user’s guide for instructions on setting the calibration factor.) Keysight N5221A/22A Service Guide 4-39...
  • Page 114 “Bottom RF Cables, 4-Port, Option 419 (Ports 1 and 2)” on page 6-86 — “Bottom RF Cables, 4-Port, Option 419 (Ports 3 and 4)” on page 6-89 Trace loss in the signal separation group is due to one or more of the following assemblies being defective: 4-40 Keysight N5221A/22A Service Guide...
  • Page 115 2. Using a 5/16-inch torque wrench, disconnect the semirigid cable at the receiver coupler. 3. Connect the spectrum analyzer to the open receiver coupler connector. Set the spectrum analyzer to measure a signal at 800 MHz. Keysight N5221A/22A Service Guide 4-41...
  • Page 116 7-45. 5. If the 800 MHz signal is present, replace the associated bias tee. Refer to “Removing and Replacing the A34–A37 Source Attenuators, the A38–A41 Bias Tees, and the A42–A45 Receiver Attenuators” on page 7-45. 4-42 Keysight N5221A/22A Service Guide...

  • Page 117: Checking The Receiver Group

    Covers” on page 7-6. Procedures described in this document are performed with power supplied to the product while protective covers are removed. Energy available at many points may, if contacted, result in personal injury. Keysight N5221A/22A Service Guide 4-43...
  • Page 118 5. If the measured signal is present, continue testing at “Checking the A20 IF Multiplexer Board” on page 4-45. 6. If the measured signal is missing on the R1 receiver, continue testing at “Checking the A33 Reference Mixer Switch” on page 4-45. 4-44 Keysight N5221A/22A Service Guide...
  • Page 119 “Removing and Replacing the A23 and A24 Mixer Bricks” on page 7-37. Checking the A20 IF Multiplexer Board 1. Locate each of the flexible RF cables at the output receivers of the IF multiplexer board: — 2-port models Keysight N5221A/22A Service Guide 4-45...
  • Page 120 “Removing and Replacing the A4–A13 Boards” on page 7-15. 6. If the measured signal is not present replace the A20 IF multiplexer board. Refer to “Removing and Replacing the A20 IF Multiplexer Board” on page 7-31. 4-46 Keysight N5221A/22A Service Guide...

  • Page 121: Instrument Block Diagrams Sheet 1

    Troubleshooting Instrument Block Diagrams Sheet 1 Instrument Block Diagrams Sheet 1 Microwave PNA, N5221A/22A Keysight N5221A/22A Service Guide 4-47...
  • Page 122 N5221A/22A 2-Port Overall Block Diagram (Includes Options 200-Standard; 201-Configurable Test Set; 210-Metrology; 217-Attenuators; and 219-Bias Tees Service Guide: N5222-90001 DISPLAY USB BD A20 IF MULTIPLEXER A12 SIGNAL PROCESSING IF = 0.826 MHz for CW Freq < 53 MHz OPTION 200 OR 210 ADC MODULE (SPAM) IF = 7.438 MHz for CW Freq >...

  • Page 123: Instrument Block Diagrams Sheet 2

    Troubleshooting Instrument Block Diagrams Sheet 2 Instrument Block Diagrams Sheet 2 Microwave PNA, N5221A/22A Keysight N5221A/22A Service Guide 4-49...
  • Page 124 N5221A/22A 4-Port Overall Block Diagram (Includes Options 400-Standard; 401-Configurable Test Set; 410-Metrology; 4 17-Attenuators; and 419-Bias Tees Service Guide: N5222-90001 DISPLAY USB BD A20 IF MULTIPLEXER A12 SIGNAL PROCESSING IF = 0.826 MHz for CW Freq < 53 MHz OPTION 400 OR 410 ADC MODULE (SPAM) IF = 7.438 MHz for CW Freq >...

  • Page 125: Theory Of Operation

    Information in This Chapter This chapter provides a general description of the operating theory of the N5221A/22A 2-port and 4-port PNA microwave network analyzers. — Theory of operation is explained to the assembly level only. — Component-level circuit theory is not provided.

  • Page 126: Network Analyzer System Operation

    These IF signals are downconverted and then sampled and digitally processed. 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 N5221A/22A 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 N5221A/22A Service Guide...
  • Page 128 The IF signals are converted to digital information by the digital processing group. 1. For frequency ranges and maximum output power levels, refer to the section “Test Port Output” in the Data Sheet and Technical Specifications documents (see hyperlinks above). Keysight N5221A/22A Service Guide...
  • Page 129 “Digital Processing and Digital Control Group Operation” on page 5-26. 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 5-31. Keysight N5221A/22A Service Guide...

  • Page 130: Synthesized Source Group Operation

    A4 and A13 boards are used to phase lock the test signal. This makes it possible for the LO signal to be tuned to a different frequency than the test signal, which is necessary since the LO signal is normally 7.438 MHz higher Keysight N5221A/22A Service Guide...
  • Page 131 Synthesized Source Group Operation than the test signal. Since the A4, A13, and A11 13.5 GHz synthesizer boards each receive their 50 MHz input reference signal from the exact same source, frequency drift error is eliminated. Keysight N5221A/22A Service Guide...
  • Page 132 Theory of Operation Synthesized Source Group Operation Figure 5-3 Source Group Keysight N5221A/22A Service Guide...

  • Page 133: A4, A13, And A11 13.5 Ghz Synthesizer Boards

    The A13 13.5 GHz synthesizer board is included only on 4-port models. The A4, A11, and A13 13.5 GHz synthesizer boards use the 50 MHz reference signal from the A14 frequency reference board to tune a VCO circuit that sweeps from 2 GHz to 4 GHz. Keysight N5221A/22A Service Guide...

  • Page 134: A5 And A8 26.5 Ghz Source Boards

    This output is terminated with a 50-ohm load on the A8 26.5 GHz source. The companion signal, EXT TEST SET DRIVE LO, is output from the A23 mixer brick. Refer to “A23 and A24 Mixer Bricks” on page 5-21. 5-10 Keysight N5221A/22A Service Guide...

  • Page 135: A21 Multiplier/Amplifier 26.5 Board (Hma26.5)

    — to act as an interface between the A17 CPU board and the auxiliary rear panel interconnects. — to provide ALC signals to the A21 HMA26.5. — to route control signals to the signal separation group. Refer to “Signal Separation Group Operation” on page 5-16 for more information. Keysight N5221A/22A Service Guide 5-11...
  • Page 136 +22 Vdc, 100 mA max. 15–16 SEL1–2 TTL out, test set select bits 1-2, tied to 0 V AD11 TTL I/O, address and latched data SEL3 TTL out, test set select bit 3, tied to 0 V 5-12 Keysight N5221A/22A Service Guide...
  • Page 137 Output Strobe TTL out, active low data write strobe (1 μs min) Write Strobe No connect Not used Pass Fail TTL out, latched, indicates pass fail (programmable polarity) +5 V +5 Vdc, 100 mA max. Keysight N5221A/22A Service Guide 5-13...
  • Page 138 Ground sense for Analog In and Analog Out Connected with 51.1 ohms to ACOM AnalogIn1 Analog input: ±10 V @ 1.22 mV typical resolution Rin > 1 M-ohm BW ≈ 1 MHz ADC conversion time < 1 us typical 5-14 Keysight N5221A/22A Service Guide...
  • Page 139 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. Keysight N5221A/22A Service Guide 5-15...

  • Page 140: Signal Separation Group Operation

    — the A28 port 2 receiver coupler and the A32 test port 2 coupler — the A29 test port 1 coupler and the A23 mixer brick receiver A — the A30 test port 3 coupler and the A24 mixer brick receiver C 5-16 Keysight N5221A/22A Service Guide...

  • Page 141: A25-A28 Receiver 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. Keysight N5221A/22A Service Guide 5-17...
  • Page 142 Theory of Operation Signal Separation Group Operation Figure 5-4 4-Port Signal Separation Group 5-18 Keysight N5221A/22A Service Guide...
  • Page 143 Theory of Operation Signal Separation Group Operation Figure 5-5 2-Port Signal Separation Group Keysight N5221A/22A Service Guide 5-19...

  • Page 144: A34-A37 65-Db Source Step Attenuators And A38-A41 Bias Tees

    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. The bias tees are to provide DC biasing for the DUT. 5-20 Keysight N5221A/22A Service Guide...

  • Page 145: Receiver Group Operation

    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 source signal that is 7.438 MHz higher Keysight N5221A/22A Service Guide 5-21...

  • Page 146: A20 If Multiplexer Board

    IFGateAin IF pulse gate input A (TTL) IFGateBin IF pulse gate input B (TTL) IFGateCin IF pulse gate input C (TTL) IFGateDin IF pulse gate input D (TTL) IFGateRin IF pulse gate input R (TTL) 5-22 Keysight N5221A/22A Service Guide...

  • Page 147: A12 Spam Board (Analog Description)

    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 5-26 for more information on signal processing. Keysight N5221A/22A Service Guide 5-23...
  • Page 148 Theory of Operation Receiver Group Operation Figure 5-6 4-Port Receiver Group 5-24 Keysight N5221A/22A Service Guide...
  • Page 149 Theory of Operation Receiver Group Operation Figure 5-7 2-Port Receiver Group Keysight N5221A/22A Service Guide 5-25...

  • Page 150: Digital Processing And Digital Control Group Operation

    A2 USB Board — A3 Display Assembly — Keypad Assembly — A14 system motherboard — Data Acquisition and Processing Subgroup — A12 SPAM Board (Digital Description) — A17 CPU Board — A51 Solid State Drive 5-26 Keysight N5221A/22A Service Guide...
  • Page 151 Theory of Operation Digital Processing and Digital Control Group Operation Figure 5-8 Digital Processing and Digital Control Group Keysight N5221A/22A Service Guide 5-27...

  • Page 152: 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 5-28 Keysight N5221A/22A Service Guide...

  • Page 153: 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 N5221A/22A Service Guide 5-29...
  • Page 154 (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. 5-30 Keysight N5221A/22A Service Guide...

  • Page 155: 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 N5221A/22A Service Guide 5-31...
  • Page 156 Theory of Operation Power Supply Group Operation 5-32 Keysight N5221A/22A Service Guide...

  • Page 157: 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 158: 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 159: Assembly Replacement Sequence

    Step 5. Perform the necessary performance tests. Refer to Chapter 3, “Tests and Adjustments.” Step 6. Keysight personnel: see “Location of Calibration Stickers on PNA” on page 1-6 to review where the calibration stickers should be placed on the PNA. Keysight N5221A/22A Service Guide...

  • Page 160: 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 N5221A/22A Service Guide...
  • Page 161 Replaceable Parts Rebuilt-Exchange Assemblies Figure 6-1 Module Exchange Procedure Keysight N5221A/22A Service Guide...

  • Page 162: Replaceable Parts Listings

    Not used Not used 26.5 GHz source board Not used Frequency reference board 13.5 GHz synthesizer board Signal processing ADC module (SPAM) board 13.5 GHz synthesizer board System motherboard Midplane board Power supply CPU board GPIB board Keysight N5221A/22A Service Guide...
  • Page 163 Port 2 bias tee Port 1 receiver step attenuator Port 3 receiver step attenuator Port 4 receiver step attenuator Port 2 receiver step attenuator Solid state drive “Top Assemblies and Cables, All Options” on page 6-16. Keysight N5221A/22A Service Guide...
  • Page 164 “Top Hardware and Miscellaneous Parts, All Options” on page 6-96 — “Bottom Hardware and Miscellaneous Parts” on page 6-98 — “Internal Hardware and Miscellaneous Parts, All Options” on page 6-101 — “External Hardware and Miscellaneous Parts, All Options” on page 6-103 — Miscellaneous Keysight N5221A/22A Service Guide...
  • Page 165 ESD Supplies on page 6-105 — Memory Modules on page 6-106 — Upgrade Kits on page 6-106 — USB Accessories on page 6-105 — Rack Mount Kits and Handle Kits on page 6-106 — Touch-up Paint on page 6-106 — Keysight N5221A/22A Service Guide...

  • Page 166: Front Panel Assembly, Front Side, All Options

    Machine screw, M3.0 x 6, 90-deg flat head (To attach subpanel to front frame.) (Only 2 used on 2-port, all 4 used on 4-port.) a. Refer to “Rack Mount Kits and Handle Kits” on page 6-106 for part numbers of complete rack mount kits. 6-10 Keysight N5221A/22A Service Guide...
  • Page 167 Replaceable Parts Replaceable Parts Listings Figure 6-2 Front Panel Assembly, Front Side, All Options Keysight N5221A/22A Service Guide 6-11...

  • Page 168: Front Panel Assembly, Back Side, All Options

    Power button keypad W1312-60047 Touch screen controller board cable harness Was 8121-1452 8121-1451 Power switch cable harness 1400-0510 Cable clamp (with adhesive backing) 0515-0667 Machine screw, M3.0 x 25 pan head (To attach display to front frame.) 6-12 Keysight N5221A/22A Service Guide...
  • Page 169 Associated parts are indicated in this table with either “Tube” or “LED.” If you replace an old part number <des- ignated “Tube”> with its new part number <designated “LED”>, you must also replace ALL of the other old part numbers <designated “Tube”> in the table with their new part numbers <designated “LED”>. Keysight N5221A/22A Service Guide 6-13...
  • Page 170 Replaceable Parts Replaceable Parts Listings Figure 6-3 Front Panel Assembly, Back Side, All Options Figure 6-4 A3 Display Assembly with Old LCD Display 2090-0883 6-14 Keysight N5221A/22A Service Guide...
  • Page 171 Replaceable Parts Replaceable Parts Listings Figure 6-5 A3 Display Assembly with New LCD Display 2090-1036 Keysight N5221A/22A Service Guide 6-15...

  • Page 172: Top Assemblies And Cables, All Options

    The A51 solid state disk drive for the 2.0 GHz CPU board plugs into the A21 CPU board assembly from the rear panel. Refer “Removing and Replacing the A51 Solid State Drive (SSD)” on page 7-50 for an illustration. 6-16 Keysight N5221A/22A Service Guide...
  • Page 173 For more information on the N8983A SSD, refer to the Windows 7 Operating System Upgrade Kit Installation Note, available online at http://literature.cdn.keysight.com/litweb/pdf/N8983-90001.pdf. e. The lithium battery is located inside the A17 CPU board assembly. Refer to “Removing and Replacing the Lithium Battery” on page 7-58 for an illustration. Keysight N5221A/22A Service Guide 6-17...
  • Page 174 Replaceable Parts Replaceable Parts Listings Figure 6-6 Top Assemblies, All Options 6-18 Keysight N5221A/22A Service Guide...
  • Page 175 A20 IF multiplexer board P203 to A12 SPAM board J5 a. SR = semirigid coaxial cable; F = flexible coaxial cable; nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness Keysight N5221A/22A Service Guide 6-19...
  • Page 176 Replaceable Parts Replaceable Parts Listings Figure 6-7 Top Cables, All Cables—All Options 6-20 Keysight N5221A/22A Service Guide...

  • Page 177: 2-Port Configuration, Option 200

    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 N5221A/22A Service Guide 6-21...
  • Page 178 Replaceable Parts Replaceable Parts Listings Figure 6-8 Bottom Assemblies, Standard 2-Port Configuration, Option 200 6-22 Keysight N5221A/22A Service Guide...
  • Page 179 A28 port 2 receiver coupler to A32 port 2 coupler W105 N5222-20076 A29 port 1 coupler to A23 mixer brick (A) W108 N5222-20078 A32 port 2 coupler to A23 mixer brick (B) a. SR = semirigid coaxial cable; F = flexible coaxial cable Keysight N5221A/22A Service Guide 6-23...
  • Page 180 Replaceable Parts Replaceable Parts Listings Figure 6-9 Bottom RF Cables, Standard 2-Port Configuration, Option 200 6-24 Keysight N5221A/22A Service Guide...
  • Page 181 A14 system motherboard J1 to A19 test set motherboard J1 to A20 IF multiplexer board J1 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 N5221A/22A Service Guide 6-25...
  • Page 182 Replaceable Parts Replaceable Parts Listings Figure 6-10 Bottom Ribbon Cables and Wire Harnesses, Standard 2-Port Configuration, Option 200 6-26 Keysight N5221A/22A Service Guide...

  • Page 183: 2-Port Configuration, Option 201

    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 N5221A/22A Service Guide 6-27...
  • Page 184 Replaceable Parts Replaceable Parts Listings Figure 6-11 Bottom Assemblies, 2-Port, Option 201 6-28 Keysight N5221A/22A Service Guide...
  • Page 185 W115 N5222-20070 A29 port 1 coupler to front-panel Port 1 CPLR ARM W116 N5222-20069 Port 2 CPLR THRU to A32 port 2 coupler W117 N5222-20071 A32 port 2 coupler to front-panel Port 2 CPLR ARM Keysight N5221A/22A Service Guide 6-29...
  • Page 186 Replaceable Parts Replaceable Parts Listings a. SR = semirigid coaxial cable; F = flexible coaxial cable 6-30 Keysight N5221A/22A Service Guide...
  • Page 187 Replaceable Parts Replaceable Parts Listings Figure 6-12 Bottom RF Cables, 2-Port, Option 201 Keysight N5221A/22A Service Guide 6-31...
  • Page 188 A14 system motherboard J1 to A19 test set motherboard J1 to A20 IF multiplexer board J1 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 6-32 Keysight N5221A/22A Service Guide...
  • Page 189 Replaceable Parts Replaceable Parts Listings Figure 6-13 Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 201 Keysight N5221A/22A Service Guide 6-33...

  • Page 190: 2-Port Configuration, Option 210

    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. 6-34 Keysight N5221A/22A Service Guide...
  • Page 191 Replaceable Parts Replaceable Parts Listings Figure 6-14 Bottom Assemblies, 2-Port, Option 210 Keysight N5221A/22A Service Guide 6-35...
  • Page 192 W123 N5222-20094 A25 port 1 receiver coupler to A29 port 1 coupler W124 N5222-20095 A28 port 2 receiver coupler to A32 port 2 coupler a. SR = semirigid coaxial cable; F = flexible coaxial cable 6-36 Keysight N5221A/22A Service Guide...
  • Page 193 Replaceable Parts Replaceable Parts Listings Figure 6-15 Bottom RF Cables, 2-Port, Option 210 Keysight N5221A/22A Service Guide 6-37...
  • Page 194 A14 system motherboard J1 to A19 test set motherboard J1 to A20 IF multiplexer board J1 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 6-38 Keysight N5221A/22A Service Guide...
  • Page 195 Replaceable Parts Replaceable Parts Listings Figure 6-16 Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 210 Keysight N5221A/22A Service Guide 6-39...

  • Page 196: 2-Port Configuration, Option 217

    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. 6-40 Keysight N5221A/22A Service Guide...
  • Page 197 Replaceable Parts Replaceable Parts Listings Figure 6-17 Bottom Assemblies, 2-Port, Option 217 Keysight N5221A/22A Service Guide 6-41...
  • Page 198 N5222-20004 A42 port 1 receiver attenuator to A23 mixer brick (A) N5222-20037 Front-panel Port 2 RCVR B IN to A45 port 2 receiver attenuator N5222-20010 A45 port 2 receiver attenuator to A23 mixer brick (B) 6-42 Keysight N5221A/22A Service Guide...
  • Page 199 W116 N5222-20069 A32 port 2 coupler to front-panel Port 2 CPLR THRU W117 N5222-20071 A32 port 2 coupler to front-panel Port 2 CPLR ARM a. SR = semirigid coaxial cable; F = flexible coaxial cable Keysight N5221A/22A Service Guide 6-43...
  • Page 200 Replaceable Parts Replaceable Parts Listings Figure 6-18 Bottom RF Cables, 2-Port, Option 217 6-44 Keysight N5221A/22A Service Guide...
  • Page 201 A14 system motherboard J1 to A19 test set motherboard J1 to A20 IF multiplexer board J1 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 N5221A/22A Service Guide 6-45...
  • Page 202 Replaceable Parts Replaceable Parts Listings Figure 6-19 Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 217 6-46 Keysight N5221A/22A Service Guide...

  • Page 203: 2-Port Configuration, Option 219

    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 N5221A/22A Service Guide 6-47...
  • Page 204 Replaceable Parts Replaceable Parts Listings Figure 6-20 Bottom Assemblies, 2-Port, Option 219 6-48 Keysight N5221A/22A Service Guide...
  • Page 205 Front-panel Port 2 CPLR THRU to A41 port 2 bias tee N5222-20031 Front-panel Port 1 RCVR A IN to A42 port 1 receiver attenuator N5222-20004 A42 port 1 receiver attenuator to A23 mixer brick (A) Keysight N5221A/22A Service Guide 6-49...
  • Page 206 W119 N5222-20072 A38 port 1 bias tee to A29 port 1 coupler W120 N5222-20065 A41 port 2 bias tee to A32 port 2 coupler a. SR = semirigid coaxial cable; F = flexible coaxial cable 6-50 Keysight N5221A/22A Service Guide...
  • Page 207 Replaceable Parts Replaceable Parts Listings Figure 6-21 Bottom RF Cables, 2-Port, Option 219 Keysight N5221A/22A Service Guide 6-51...
  • Page 208 A14 system motherboard J1 to A19 test set motherboard J1 to A20 IF multiplexer board J1 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 6-52 Keysight N5221A/22A Service Guide...
  • Page 209 Replaceable Parts Replaceable Parts Listings Figure 6-22 Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 219 Keysight N5221A/22A Service Guide 6-53...

  • Page 210: 4-Port Configuration, Option 400

    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. 6-54 Keysight N5221A/22A Service Guide...
  • Page 211 Replaceable Parts Replaceable Parts Listings Figure 6-23 Bottom Assemblies, Standard 4-Port Configuration, Option 400 Keysight N5221A/22A Service Guide 6-55...
  • Page 212 A26 port 3 receiver coupler to A24 mixer brick (R3) N5222-20081 A27 port 4 receiver coupler to A24 mixer brick (R4) W100 N5222-20079 A28 port 2 receiver coupler A23 mixer brick (R2) W101 N5222-20084 A25 port 1 receiver coupler to A29 port 1 coupler 6-56 Keysight N5221A/22A Service Guide...
  • Page 213 A30 port 3 coupler to A24 mixer brick (C) W107 N5222-20087 A31 port 4 coupler to A24 mixer brick (D) W108 N5222-20086 A32 port 2 coupler to A23 mixer brick (B) a. SR = semirigid coaxial cable; F = flexible coaxial cable Keysight N5221A/22A Service Guide 6-57...
  • Page 214 Replaceable Parts Replaceable Parts Listings Figure 6-24 Bottom RF Cables, Standard 4-Port Configuration, Option 400 6-58 Keysight N5221A/22A Service Guide...
  • Page 215 A14 system motherboard J1 to A19 test set motherboard J1 to A20 IF multiplexer board J1 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 N5221A/22A Service Guide 6-59...
  • Page 216 Replaceable Parts Replaceable Parts Listings Figure 6-25 Bottom Ribbon Cables and Wire Harnesses, Standard 4-Port Configuration, Option 400 6-60 Keysight N5221A/22A Service Guide...

  • Page 217: 4-Port Configuration, Option 401

    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 N5221A/22A Service Guide 6-61...
  • Page 218 Replaceable Parts Replaceable Parts Listings Figure 6-26 Bottom Assemblies, 4-Port, Option 401 6-62 Keysight N5221A/22A Service Guide...
  • Page 219 Port 1 RCVR A IN to A23 mixer brick (A) N5222-20048 Port 3 RCVR C IN to A24 mixer brick (C) N5222-20055 Port 4 RCVR D IN to A24 mixer brick (D) N5222-20052 Port 2 RCVR B IN to A23 mixer brick (B) Keysight N5221A/22A Service Guide 6-63...
  • Page 220 A24 mixer brick (R3) to A20 IF multiplexer (P413) N5242-60023 A24 mixer brick (C) to A20 IF multiplexer (P601) W59-W63 Refer to “Top Cables, All Cables—All Options” on page 6-19. a. SR = semirigid coaxial cable; F = flexible coaxial cable 6-64 Keysight N5221A/22A Service Guide...
  • Page 221 Replaceable Parts Replaceable Parts Listings Figure 6-27 Bottom RF Cables, 4-Port, Option 401 Keysight N5221A/22A Service Guide 6-65...
  • Page 222 A14 system motherboard J1 to A19 test set motherboard J1 to A20 IF multiplexer board J1 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 6-66 Keysight N5221A/22A Service Guide...
  • Page 223 Replaceable Parts Replaceable Parts Listings Figure 6-28 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 401 Keysight N5221A/22A Service Guide 6-67...

  • Page 224: 4-Port Configuration, Option 410

    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. 6-68 Keysight N5221A/22A Service Guide...
  • Page 225 Replaceable Parts Replaceable Parts Listings Figure 6-29 Bottom Assemblies, 4-Port, Option 410 Keysight N5221A/22A Service Guide 6-69...
  • Page 226 A26 port 3 receiver coupler to A24 mixer brick (R3) N5222-20081 A27 port 4 receiver coupler to A24 mixer brick (R4) W100 N5222-20079 A28 port 2 receiver coupler to A23 mixer brick (R2) W105 N5222-20088 A29 port 1 coupler to A23 mixer brick (A) 6-70 Keysight N5221A/22A Service Guide...
  • Page 227 A65 6-dB attenuator to A30 port 3 coupler W111 N5222-20097 A66 6-dB attenuator to A31 port 4 coupler W112 N5222-20098 A67 6-dB attenuator to A32 port 2 coupler a. SR = semirigid coaxial cable; F = flexible coaxial cable Keysight N5221A/22A Service Guide 6-71...
  • Page 228 Replaceable Parts Replaceable Parts Listings Figure 6-30 Bottom RF Cables, 4-Port, Option 410 6-72 Keysight N5221A/22A Service Guide...
  • Page 229 A14 system motherboard J1 to A19 test set motherboard J1 to A20 IF multiplexer board J1 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 N5221A/22A Service Guide 6-73...
  • Page 230 Replaceable Parts Replaceable Parts Listings Figure 6-31 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 410 6-74 Keysight N5221A/22A Service Guide...

  • Page 231: 4-Port Configuration, Option 417

    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 N5221A/22A Service Guide 6-75...
  • Page 232 Replaceable Parts Replaceable Parts Listings Figure 6-32 Bottom Assemblies, 4-Port, Option 417 6-76 Keysight N5221A/22A Service Guide...
  • Page 233 A25 port 1 receiver coupler to A34 port 1 source attenuator N5222-20028 A34 port 1 source attenuator to front-panel Port 1 SOURCE OUT N5222-20001 A28 port 2 receiver coupler to A37 port 2 source attenuator Keysight N5221A/22A Service Guide 6-77...
  • Page 234 A42 port 1 receiver attenuator to A23 mixer brick (A) N5222-20037 Port 2 RCVR B IN to A45 port 2 receiver attenuator N5222-20010 A45 port 2 receiver attenuator to A23 mixer brick (B) a. SR = semirigid coaxial cable; F = flexible coaxial cable 6-78 Keysight N5221A/22A Service Guide...
  • Page 235 Replaceable Parts Replaceable Parts Listings Figure 6-33 Bottom RF Cables, 4-Port, Option 417 (Ports 1 and 2) Keysight N5221A/22A Service Guide 6-79...
  • Page 236 A43 port 3 receiver attenuator to A24 mixer brick (C) N5222-20022 Port 4 RCVR D IN to A44 port 4 receiver attenuator N5222-20026 A44 port 4 receiver attenuator to A24 mixer brick (D) a. SR = semirigid coaxial cable; F = flexible coaxial cable 6-80 Keysight N5221A/22A Service Guide...
  • Page 237 Replaceable Parts Replaceable Parts Listings Figure 6-34 Bottom RF Cables, 4-Port, Option 417 (Ports 3 and 4) Keysight N5221A/22A Service Guide 6-81...
  • Page 238 A14 system motherboard J1 to A19 test set motherboard J1 to A20 IF multiplexer board J1 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 6-82 Keysight N5221A/22A Service Guide...
  • Page 239 Replaceable Parts Replaceable Parts Listings Figure 6-35 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 417 Keysight N5221A/22A Service Guide 6-83...

  • Page 240: 4-Port Configuration, Option 419

    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. 6-84 Keysight N5221A/22A Service Guide...
  • Page 241 Replaceable Parts Replaceable Parts Listings Figure 6-36 Bottom Assemblies, 4-Port, Option 419 Keysight N5221A/22A Service Guide 6-85...
  • Page 242 A34 port 1 source attenuator to front-panel Port 1 SOURCE OUT N5222-20029 Port 1 CPLR THRU to A38 port 1 bias tee N5222-20012 A38 port 1 bias tee to A29 port 1 coupler N5222-20001 A28 port 2 receiver coupler to A37 port 2 source attenuator 6-86 Keysight N5221A/22A Service Guide...
  • Page 243 A42 port 1 receiver attenuator to A23 mixer brick (A) N5222-20037 Port 2 RCVR B IN to A45 port 2 receiver attenuator N5222-20010 A45 port 2 receiver attenuator to A23 mixer brick (B) a. SR = semirigid coaxial cable; F = flexible coaxial cable Keysight N5221A/22A Service Guide 6-87...
  • Page 244 Replaceable Parts Replaceable Parts Listings Figure 6-37 Bottom RF Cables, 4-Port, Option 419 (Ports 1 and 2) 6-88 Keysight N5221A/22A Service Guide...
  • Page 245 N5222-20021 Port 3 RCVR C IN to A43 port 3 receiver attenuator N5222-20006 A43 port 3 receiver attenuator to A24 mixer brick (C) N5222-20022 Port 4 RCVR D IN to A44 port 4 receiver attenuator Keysight N5221A/22A Service Guide 6-89...
  • Page 246 Replaceable Parts Replaceable Parts Listings Reference Part Number Description Type Designator N5222-20026 A44 port 4 receiver attenuator to A24 mixer brick (D) a. SR = semirigid coaxial cable; F = flexible coaxial cable 6-90 Keysight N5221A/22A Service Guide...
  • Page 247 Replaceable Parts Replaceable Parts Listings Figure 6-38 Bottom RF Cables, 4-Port, Option 419 (Ports 3 and 4) Keysight N5221A/22A Service Guide 6-91...
  • Page 248 A14 system motherboard J1 to A19 test set motherboard J1 to A20 IF multiplexer board J1 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 6-92 Keysight N5221A/22A Service Guide...
  • Page 249 Replaceable Parts Replaceable Parts Listings Figure 6-39 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 419 Keysight N5221A/22A Service Guide 6-93...

  • Page 250: Rear Panel Assembly, All Options

    Lock washer 2950-0035 Hex nut 1250-3805 Bulkhead connector, f-f, PC 3.5, 50-ohm; includes hex nut and washer 3050-2330 Lock washer (For A24 IF MUX board connectors.) 2950-0414 Hex nut (For A24 IF MUX board connectors.) 6-94 Keysight N5221A/22A Service Guide...
  • Page 251 Replaceable Parts Replaceable Parts Listings Figure 6-40 Rear Panel Assembly, All Options Keysight N5221A/22A Service Guide 6-95...

  • Page 252: Top Hardware And Miscellaneous Parts, All Options

    Machine screw, M3.0 x 16, pan head (To attach midplane board to midplane bracket.) 0400-0353 Midplane board grommets 0515-0380 Machine screw, M4.0 x 10, pan head (To secure A4, A5, A8, A11, A12, and A13 boards.) Figure 6-41 Top Hardware and Miscellaneous Parts, Side View, All Options 6-96 Keysight N5221A/22A Service Guide...
  • Page 253 Replaceable Parts Replaceable Parts Listings Figure 6-42 Top Hardware and Miscellaneous Parts, Top View, All Options Keysight N5221A/22A Service Guide 6-97...

  • Page 254: Bottom Hardware And Miscellaneous Parts

    Coupler bumper; 2-port (Between each coupler and test set front sub panel.) 0960-0055 Termination, male SMA short circuit 0515-1521 Machine screw, M3.0 x 5, flat head (To attach front panel LED boards.) N5221-00005 Test set deck 6-98 Keysight N5221A/22A Service Guide...
  • Page 255 Machine screw, M4.0 x 0.7, pan head (To attach A20 IF MUX to test set deck. 1250-3805 Bulkhead connector, f-f, PC 3.5, 50-ohm; includes hex nut and washer (Qty 12 for options 201, 217, and 219; qty 24 for options 401, 417, and 419.) N5235-00018 Bracket, ribbon cable clamp Keysight N5221A/22A Service Guide 6-99...
  • Page 256 Replaceable Parts Replaceable Parts Listings Figure 6-43 Bottom Hardware and Miscellaneous Parts, All Options 6-100 Keysight N5221A/22A Service Guide...

  • Page 257: Internal Hardware And Miscellaneous Parts, All Options

    2 to attach side bracket to front bracket, 5 to attach side bracket to chassis, 22 to attach chassis to left and right side inner brackets, midplane bracket, and front bracket.) N5242-00017 Front bracket N5242-40002 PC board guides N5242-00016 Side bracket (left) Keysight N5221A/22A Service Guide 6-101...
  • Page 258 Replaceable Parts Replaceable Parts Listings Figure 6-44 Internal Hardware and Miscellaneous Parts, All Options 6-102 Keysight N5221A/22A Service Guide...

  • Page 259: External Hardware And Miscellaneous Parts, All Options

    Machine screw, M3.0 x 6, flat head (To attach inner cover.) 5041-9691 Trim strip Not shown 5023-1399 Front handle Not shown 0515-2044 Machine screw, M4.0 x 10, flat head (To attach front handles.) Not shown N5245-40001 Front impact cover Not shown N5245-40002 Rear impact cover Keysight N5221A/22A Service Guide 6-103...

  • Page 260: Miscellaneous Part Numbers

    Part Numbers for Miscellaneous Parts and Accessories Description Model or Part Number Service Tools 1/4 inch and 5/16 inch open-end wrench, thin profile 8710-0510 5/16 inch (8 mm), open-end torque wrench; 0.9 N-m (8 in-lb) 8710-1765 6-104 Keysight N5221A/22A Service Guide...
  • Page 261 GPIB cable, 2 meter (6.6 feet) 10833B GPIB cable, 4 meter (13.2 feet) 10833C GPIB cable to GPIB cable adapter 10834A Fuses Rear Panel Bias Input Fuse; Ports 1, 2, 3, and 4 (0.5 A, 125 V) 2110-0824 Was 2110-0046 Keysight N5221A/22A Service Guide 6-105...
  • Page 262 Rack mount rail set E3663AC 5063-9230 Front handle kit (two classic handles and hardware) Touch-up Paint Dove gray (for use on frame around front panel and painted portion of handles) 6010-1146 French gray (for use on cover) 6010-1147 6-106 Keysight N5221A/22A Service Guide...
  • Page 263 Parchment white (for use on rack mount flanges, rack support flanges, and front 6010-1148 panels) a. For rack mount use, you must replace factory installed ruggedized handles (thick aluminum, no trim) with classic handles (thin aluminum with plastic trim), included with Option 1CP. Keysight N5221A/22A Service Guide 6-107...
  • Page 264 Replaceable Parts Replaceable Parts Listings 6-108 Keysight N5221A/22A Service Guide...

  • Page 265: Repair And Replacement Procedures

    2-Port and 4-Port PNA Series 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 266: 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 N5221A/22A Service Guide...

  • Page 267: 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 N5221A/22A Service Guide...

  • Page 268: Removal And Replacement Procedures

    Port 3 receiver coupler Port 4 receiver coupler Port 2 receiver coupler Port 1 test port coupler page 7-41 Port 3 test port coupler Port 4 test port coupler Port 2 test port coupler Reference mixer switch page 7-43 Keysight N5221A/22A Service Guide...
  • Page 269 7-48 Port 4 bias tee Port 2 bias tee Port 1 receiver step attenuator page 7-45 Port 3 receiver step attenuator Port 4 receiver step attenuator Port 2 receiver step attenuator Solid state drive page 7-50 Keysight N5221A/22A Service Guide...

  • Page 270: 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 N5221A/22A Service Guide...
  • Page 271 Repair and Replacement Procedures Removing the Covers Figure 7-1 Outer and Inner Cover Removal Keysight N5221A/22A Service Guide...

  • Page 272: 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 7-60. Keysight N5221A/22A Service Guide...
  • Page 273 Repair and Replacement Procedures Removing and Replacing the Front Panel Assembly Figure 7-2 Front Panel Assembly Removal Keysight N5221A/22A Service Guide...

  • Page 274: Removing And Replacing The A1-A3 And Other Front Panel Subassemblies

    ⑦ 1. Disconnect the inverter board cable (item ) and the LCD cable (item from the inverter board. ⑧ 2. Remove two screws (item ) and remove the inverter board. Removing the Touchscreen Controller Board 7-10 Keysight N5221A/22A Service Guide...
  • Page 275 ) and remove the power switch board. 3. 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. Figure 7-3 Front Panel Subassemblies Removal Keysight N5221A/22A Service Guide 7-11...
  • Page 276 To replace the touch screen, note the orientation of the rubber boot on the old touch screen and then remove it and install it on the new one in the same orientation. 7-12 Keysight N5221A/22A Service Guide...
  • Page 277 (item ) that attach it to ⑧ the LCD display hold down bracket (item ). Note the location of the four ⑩ spacers (item ) before separating the LCD display from the hold down bracket. Keysight N5221A/22A Service Guide 7-13...
  • Page 278 A3 Display Assembly and Touch Screen Removal-2 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 7-60. 7-14 Keysight N5221A/22A Service Guide...

  • Page 279: Removing And Replacing The A4-A13 Boards

    When replacing the A5 or A8 source board, remove the semirigid cables attached to the bottom of the old board and attach them to the bottom of the new board. Be sure to orient these cables the same as they were on the old board. Keysight N5221A/22A Service Guide 7-15...
  • Page 280 The A4, A11, and A13 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 7-60 7-16 Keysight N5221A/22A Service Guide...
  • Page 281 Repair and Replacement Procedures Removing and Replacing the A4–A13 Boards Figure 7-6 A4, A5, A8, A10, A11, A12, and A13 Boards Removal Keysight N5221A/22A Service Guide 7-17...

  • Page 282: Removing And Replacing The A14 System Motherboard

    15 keyhole standoffs (item ) on the chassis. 13.Lift the A14 system motherboard just enough to unplug the ribbon cable from the bottom side, then lift it out of the analyzer. 7-18 Keysight N5221A/22A Service Guide...
  • Page 283 Removing and Replacing the A14 System 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 7-60. Keysight N5221A/22A Service Guide 7-19...
  • Page 284 Repair and Replacement Procedures Removing and Replacing the A14 System Motherboard Figure 7-7 A14 System Motherboard Removal 7-20 Keysight N5221A/22A Service Guide...

  • Page 285: Removing And Replacing The A15 Midplane Board

    2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-60. Keysight N5221A/22A Service Guide 7-21...
  • Page 286 Repair and Replacement Procedures Removing and Replacing the A15 Midplane Board Figure 7-8 A15 Midplane Board Removal 7-22 Keysight N5221A/22A Service Guide...

  • Page 287: Removing And Replacing The A16 Power Supply Assembly

    5. Slide the A16 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 7-60. Keysight N5221A/22A Service Guide 7-23...
  • Page 288 Repair and Replacement Procedures Removing and Replacing the A16 Power Supply Assembly Figure 7-9 A16 Power Supply Assembly Removal 7-24 Keysight N5221A/22A Service Guide...

  • Page 289: Removing And Replacing The A17 Cpu Board Assembly

    Drive (SSD)” on page 7-50. 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 7-60. Keysight N5221A/22A Service Guide 7-25...
  • Page 290 Repair and Replacement Procedures Removing and Replacing the A17 CPU Board Assembly Figure 7-10 A17 CPU Board Assembly Removal 7-26 Keysight N5221A/22A Service Guide...

  • Page 291: 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 7-60. Keysight N5221A/22A Service Guide 7-27...
  • Page 292 Repair and Replacement Procedures Removing and Replacing the A18 GPIB Board Figure 7-11 A18 GPIB Board Removal 7-28 Keysight N5221A/22A Service Guide...

  • Page 293: Removing And Replacing The A19 Test Set Motherboard

    9 in-lbs using the T-10 TORX driver. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-60. Keysight N5221A/22A Service Guide 7-29...
  • Page 294 Repair and Replacement Procedures Removing and Replacing the A19 Test Set Motherboard Figure 7-12 A19 Test Set Motherboard Removal 7-30 Keysight N5221A/22A Service Guide...

  • Page 295: Removing And Replacing The A20 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 7-60. Keysight N5221A/22A Service Guide 7-31...
  • Page 296 Repair and Replacement Procedures Removing and Replacing the A20 IF Multiplexer Board Figure 7-13 A20 IF Multiplexer Board Removal 7-32 Keysight N5221A/22A Service Guide...

  • Page 297: Removing And Replacing The A21 Hma26.5

    1. Reverse the order of the removal procedure. Torque all RF 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 7-60. Keysight N5221A/22A Service Guide 7-33...
  • Page 298 Repair and Replacement Procedures Removing and Replacing the A21 HMA26.5 Figure 7-14 A21 HMA26.5 Removal 7-34 Keysight N5221A/22A Service Guide...

  • Page 299: Removing And Replacing The A22 Splitter

    1. Reverse the order of the removal procedure. Torque all RF 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 7-60. Keysight N5221A/22A Service Guide 7-35...
  • Page 300 Repair and Replacement Procedures Removing and Replacing the A22 Splitter Figure 7-15 A22 Splitter Removal 7-36 Keysight N5221A/22A Service Guide...

  • Page 301: Removing And Replacing The A23 And A24 Mixer Bricks

    10.Remove three screws that attach the mixer brick to be replaced to the mixer brick mounting block, and remove the mixer brick from the mounting block. Replacement Procedure Keysight N5221A/22A Service Guide 7-37...
  • Page 302 Torque all RF 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 7-60. Figure 7-16 A23 and A24 Mixer Bricks Removal 7-38 Keysight N5221A/22A Service Guide...

  • Page 303: Removing And Replacing The A25-A28 Receiver Couplers And Mounting Brackets

    1. Reverse the order of the removal procedure. 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 7-60. Keysight N5221A/22A Service Guide 7-39...
  • Page 304 Repair and Replacement Procedures Removing and Replacing the A25–A28 Receiver Couplers and Mounting Brackets Figure 7-17 A25 through A28 Receiver Couplers Removal 7-40 Keysight N5221A/22A Service Guide...

  • Page 305: Removing And Replacing The A29-A32 Test Port Couplers

    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 7-60. Keysight N5221A/22A Service Guide 7-41...
  • Page 306 Repair and Replacement Procedures Removing and Replacing the A29–A32 Test Port Couplers Figure 7-18 A29 through A32 Test Port Couplers Removal 7-42 Keysight N5221A/22A Service Guide...

  • Page 307: Removing And Replacing The A33 Reference Mixer Switch

    ) and torque the connectors to 10 in-lbs, then tighten the three mounting screws. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-60. Keysight N5221A/22A Service Guide 7-43...
  • Page 308 Repair and Replacement Procedures Removing and Replacing the A33 Reference Mixer Switch Figure 7-19 A33 Reference Mixer Switch Removal 7-44 Keysight N5221A/22A Service Guide...

  • Page 309: Removing And Replacing The A34-A37 Source Attenuators, The A38-A41 Bias Tees, And The A42-A45 Receiver Attenuators

    ) that secure the attenuator bracket to the test set deck. 10.Move the disconnected semirigid cables out of the way and lift the attenuator bracket out of the analyzer, with the attenuators and bias tee attached. Keysight N5221A/22A Service Guide 7-45...
  • Page 310 1. Reverse the order of the removal procedure. 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 7-60. 7-46 Keysight N5221A/22A Service Guide...
  • Page 311 Repair and Replacement Procedures Removing and Replacing the A34–A37 Source Attenuators, the A38–A41 Bias Tees, and the A42–A45 Receiver Attenuators Figure 7-20 Source and Receiver Step Attenuators and Bias Tees Removal Keysight N5221A/22A Service Guide 7-47...

  • Page 312: Removing And Replacing The A38-A41 Bias Tees

    Do not overbend them. Replacement Procedure 1. Reverse the order of the removal procedure. Torque all cable connections to 10 in-lbs. Remember to place the wire harness cable ground lug on the proper mounting screw. 7-48 Keysight N5221A/22A Service Guide...
  • Page 313 3. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-60. Figure 7-21 A38 through A41 Bias Tees Removal Figure 7-22 Orientation of Bias Tee Capacitors Keysight N5221A/22A Service Guide 7-49...

  • Page 314: Removing And Replacing The A51 Solid State Drive (Ssd)

    (item Replacement ➁ 1. Using the handle (item ), slide the A51 SSD into the A17 CPU board and ① tighten the knurled nut (item Figure 7-23 Solid State Drive Replacement 7-50 Keysight N5221A/22A Service Guide...
  • Page 315 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 N5221A/22A Service Guide 7-51...

  • Page 316: Removing And Replacing The Rear Panel

    9. 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 7-60. 7-52 Keysight N5221A/22A Service Guide...
  • Page 317 Repair and Replacement Procedures Removing and Replacing the Rear Panel Figure 7-24 Rear Panel Removal Keysight N5221A/22A Service Guide 7-53...

  • Page 318: 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 7-60. 7-54 Keysight N5221A/22A Service Guide...
  • Page 319 Repair and Replacement Procedures Removing and Replacing the Front Panel LED Boards Figure 7-25 Front Panel LED Boards Removal Keysight N5221A/22A Service Guide 7-55...

  • Page 320: 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 7-60. 7-56 Keysight N5221A/22A Service Guide...
  • Page 321 Repair and Replacement Procedures Removing and Replacing the Fans Figure 7-26 B1 Fan Removal Keysight N5221A/22A Service Guide 7-57...

  • Page 322: 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 7-60. 7-58 Keysight N5221A/22A Service Guide...
  • Page 323 Repair and Replacement Procedures Removing and Replacing the Lithium Battery Figure 7-27 Lithium Battery Removal Keysight N5221A/22A Service Guide 7-59...

  • Page 324: Post-Repair Procedures

    Frequency Accuracy Test IF Gain Adjustment Source Power Accuracy Test Receiver Characterization Source Maximum Power Output Receiver Adjustment Test IF Response Adjustment (Option Source Power Linearity Test 090, 093, or 094 Only) The Operator’s Check 7-60 Keysight N5221A/22A Service Guide...
  • Page 325 A14 system motherboard No adjustment needed Front Panel Keypad and RPG Test A3 Display Test Chapter 4 The Operator’s Check A15 midplane board No adjustment needed None needed A16 power supply assembly No adjustment needed None needed Keysight N5221A/22A Service Guide 7-61...
  • Page 326 090, 093, or 094 Only) A23 and A24 mixer bricks Source Adjustment Noise Floor Test IF Gain Adjustment Receiver Compression Test Receiver Characterization Dynamic Accuracy Test Receiver Adjustment IF Response Adjustment (Option 090, 093, or 094 Only) 7-62 Keysight N5221A/22A Service Guide...
  • Page 327 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” on page 3-44 Keysight N5221A/22A Service Guide 7-63...
  • Page 328 Repair and Replacement Procedures Post-Repair Procedures 7-64 Keysight N5221A/22A Service Guide...

  • Page 329: General Purpose Maintenance Procedures

    Keysight Microwave Network Analyzers 2-Port and 4-Port PNA Series Service Guide General Purpose Maintenance Procedures Information in This Chapter Chapter Eight at-a-Glance Section Title Summary of Content Start Page Error Terms How to use error terms as a preventive maintenance and page 8-2 troubleshooting tool.

  • Page 330: 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 N5221A/22A Service Guide...

  • Page 331: 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 N5221A/22A Service Guide...
  • Page 332 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 N5221A/22A Service Guide...
  • Page 333 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 N5221A/22A Service Guide...

  • Page 334: 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 N5221A/22A Service Guide...
  • Page 335 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 N5221A/22A Service Guide...

  • Page 336: Error Term Data

    All crosstalk values are typical. Measurement conditions: normalized to a thru, measured with two shorts, 10 Hz IF band- width, averaging factor of 8, alternate mode, source power set to the lesser of the maximum power out or the maximum receiver power. Keysight N5221A/22A Service Guide...
  • Page 337 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 N5221A/22A Service Guide...
  • Page 338 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 4-43 or to “Checking the Signal Separation Group” on page 4-39. 8-10 Keysight N5221A/22A Service Guide...

  • Page 339: Option Enable Utility

    Using the current Host ID will cause a license to be generated that will not work with the instrument. To determine the new Host ID, use the utility at the below listed web site with the new model number. http://na.support.keysight.com/pna/upgrades.html Keysight N5221A/22A Service Guide 8-11...

  • Page 340: Enabling Or Removing Options

    4. If the desired option is not available in the list, select: “??? - Enter Unlisted Option”. A dialog box appears that will allow you to enter the option number. Enter the option number and follow the instructions on the display. 8-12 Keysight N5221A/22A Service Guide...

  • Page 341: Repairing And Recovering Option Data

    Service Option Enable System b. Press UTILITY , then Help , then About NA... System 6. If the options are still not listed correctly, contact Keysight for assistance. Refer to “Contacting Keysight” on page 2-7. Keysight N5221A/22A Service Guide 8-13...

  • Page 342: Installing Or Changing A Serial Number

    Keysight, enter the clear code in the space provided and click CLEAR. The correct serial number can then be entered. To change an incorrect serial number, a clear-code password is required. Contact Keysight to obtain the clear-code. Refer to “Contacting Keysight” on page 2-7. 8-14 Keysight N5221A/22A Service Guide...

  • Page 343: Firmware Upgrades

    — Press UTILITY , then , then Service 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. Keysight N5221A/22A Service Guide 8-15...

  • Page 344: 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://na.support.keysight.com/pna/ The URL for the Hard Drive Recovery page is: http://na.support.keysight.com/pna/hdrecovery.html 8-16 Keysight N5221A/22A Service Guide...

  • Page 345: Correction Constants

    — Navigate to the EEPROM Backup Utility, located at: C:\Program Files\Keysight\Network Analyzer\Service\eebackup.exe — Run the program. — Click Backup EEPROM. — Click Exit when the program has finished. Keysight N5221A/22A Service Guide 8-17...
  • Page 346 General Purpose Maintenance Procedures Correction Constants 8-18 Keysight N5221A/22A Service Guide...
  • Page 347 A13 13.5 GHz source 2 illustrated , 22, 28, 35, 41, 48, 55, troubleshooting synthesizer board 62, 69, illustrated operation operation part number , 21, 27, 34, 40, 47, part number 54, 61, 68, 75, A receiver removal and replacement Keysight N5221A/22A Service Guide...
  • Page 348 , 84, troubleshooting A3 display assembly part number A24 mixer brick illustrated removal and replacement illustrated operation , 55, 62, 69, illustrated operation part number procedure part number removal and replacement , 54, 61, 68, 75, Keysight N5221A/22A Service Guide...
  • Page 349 A41 test port 2 bias tee signal separation illustrated illustrated , 84, group procedure , 18, part number covers A51 solid state drive removal and replacement illustrated illustrated illustrated , 47, operation part numbers procedure , 45, Keysight N5221A/22A Service Guide...
  • Page 350 , 23, 29, sequence IF multiplexer board replaceable ribbon cables attenuators keypad assembly illustrated , 26, 33, required for servicing MA 26.5 part numbers , 11, , 25, 32, main RAM Keysight N5221A/22A Service Guide...
  • Page 351 Option 419 Option 200 illustrated replaceable assemblies illustrated , 24, 31, part numbers illustrated part numbers , 23, 29, cables, wire harnesses part numbers replaceable RF cables Keysight N5221A/22A Service Guide...
  • Page 352 LAN GPIB HANDLER I/O , 12, magnitude and phase PULSE I/O stability, failure PWR I/O D receiver TEST SET I/O troubleshooting return loss, failure of typical power output test port cables , 12, Keysight N5221A/22A Service Guide...
  • Page 353 , 12, 13, isolation troubleshooting analyzer , 14, load match illustrated cable magnitude replacement part numbers affected by , 12, 13, port firmware monitoring over time Keysight N5221A/22A Service Guide...
  • Page 354 , 10, illustrated hard disk drive troubleshooting , 14, subgroup copying files from inverter board touch screen installing backup files illustrated illustrated onto part number parts list removal and replacement keypad assembly trim strip, filler illustrated Keysight N5221A/22A Service Guide...
  • Page 355 , 22, 28, 35, 41, 48, 55, illustrated removal and replacement 62, 69, parts list illustrated operation LED board procedure part number , 21, 27, 34, 40, 47, front panel troubleshooting 54, 61, 68, 75, illustrated Keysight N5221A/22A Service Guide...
  • Page 356 54, 61, 68, 75, receiver group effect on error terms receiver step attenuators measurement reference mixer switch calibration signal separation group N1966A pulse I/O adapter configuration solid state drive nameplate high dynamic range source group Keysight N5221A/22A Service Guide...
  • Page 357 Option 219/H85, bottom Option part number assembly 219/H85 power switch , 40, replaceable RF cables part number bottom assembly, , 10, illustrated Option 400 , 54, part numbers replaceable ribbon cables bottom assembly, illustrated pads Option 419 Keysight N5221A/22A Service Guide...
  • Page 358 Option Option 400 , 59, description of 419/H85 part numbers dynamic accuracy bottom assembly, in external analyzer frequency accuracy Option 419 illustrated noise floor replaceable wire harnesses part numbers receiver bottom assembly, Keysight N5221A/22A Service Guide...
  • Page 359 RAM, main check dynamic accuracy test operation functional description of functional description of rear panel functional group functional group connectors illustrated group Keysight N5221A/22A Service Guide...
  • Page 360 , 22, 28, illustrated part number , 21, 27, 34, 40, 47, part numbers , 21, 27, part numbers 54, 61, 68, 75, in bottom assembly, Option in bottom assembly, removal and replacement Option 219/H85 illustrated illustrated illustrated Keysight N5221A/22A Service Guide...
  • Page 361 , 41, part numbers , 25, 32, illustrated A31 test port 4 coupler in bottom assembly, procedure procedure , 41, Option 219 A18 GPIB board A32 test port 2 coupler illustrated illustrated illustrated part numbers procedure procedure Keysight N5221A/22A Service Guide...
  • Page 362 A44 test port 4 receiver step illustrated Option 219 attenuator procedure illustrated illustrated power switch board part numbers procedure illustrated in bottom assembly, A45 test port 2 receiver step procedure Option 219/H85 attenuator rear panel illustrated illustrated Keysight N5221A/22A Service Guide...
  • Page 363 Keysight N5221A/22A Service Guide...
  • Page 364 EE default test port power illustrated frequency at 10 MHz accuracy procedure getting ready receiver compression troubleshooting IF gain source power linearity test port 2 bias tee IF response illustrated , 84, receiver calibration Keysight N5221A/22A Service Guide...
  • Page 365 , 84, trace A stability part number troubleshooting magnitude and phase removal and replacement trace noise stability illustrated test failure procedure traceability performing troubleshooting measurement Keysight N5221A/22A Service Guide...
  • Page 366 A39 test port 3 bias tee signal separation group front panel A4 13.5 GHz source 1 source group illustrated synthesizer board single vs. broadband A40 test port 4 bias tee utility speaker A41 test port 2 bias tee option enable Keysight N5221A/22A Service Guide...
  • Page 367 Keysight standard wire harnesses in bottom assembly, Option 200 illustrated , 26, 33, part numbers , 25, 32, in bottom assembly, Option 219 Keysight N5221A/22A Service Guide...
  • Page 368 This information is subject to change without notice. © Keysight Technologies 2011-2017 Edition 2, December 2017 N5222-90001 www.keysight.com...

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