Page 1 Keysight N5224A and N5225A 2-Port and 4-Port PNA Microwave Network Analyzers (10 MHz - 43.5 GHz) (10 MHz - 50 GHz)  Service Guide...
Page 2 Service Guide N5225-90001...
Page 3 Notices © Keysight Technologies 2011 - 2014 Manual Part Number computer software” as defined in FAR 52.227-19 (June 1987) or any equivalent No part of this manual may be reproduced N5225-90001 agency regulation or contract clause. Use, in any form or by any means (including...
Page 4 Printing Copies of Documentation from the To print copies of documentation from the Web, download the PDF file from the Keysight web site: • Go to http://www.keysight.com. • Enter the product model number (Ex: N5225A) in the Search box.
Page 5: Table Of Contents
Shipping Your Analyzer to Keysight for Service or Repair ....... .
Page 6 Contents What the System Verification Verifies ............3-19 Measurement Uncertainty .
Page 7 Contents Checking the Source Group ..............4-30 Checking the Signal Separation Group.
Page 8 Contents 2-Port Configuration, Option 201..............6-28 2-Port Configuration, Option 210.
Page 9 Contents General Purpose Maintenance Procedures Information in This Chapter ............... 8-2 Chapter Eight at-a-Glance .
Page 10 Contents Contents-6 Service Guide N5225-90001...
Page 11: Safety And Regulatory Information
Safety and Regulatory Information Service Guide N5225-90001...
Page 12: Information In This Chapter
Safety and Regulatory Information PNA Series Microwave Network Analyzers Information in This Chapter N5224A and N5225A 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 13: Safety Symbols
PNA Series Microwave Network Analyzers Safety and Regulatory Information N5224A and N5225A Safety Symbols Safety Symbols The following safety symbols are used throughout this manual. Familiarize yourself with each of the symbols and its meaning before operating this instrument. CAUTION Caution denotes a hazard.
Page 14: Servicing
Safety and Regulatory Information PNA Series Microwave Network Analyzers General Safety Considerations N5224A and N5225A WARNING Supply voltages which oscillate between the two normal input ranges of the autoranging line voltage input will damage the power supply. In rare cases, this damage has become a user safety concern.
Page 15 LINE switch (disconnecting device). NOTE There are no replaceable fuses in the mains input or within the power supply assembly. IMPORTANT Keysight personnel: after calibration is completed, attach four “calibration void if seal broken” stickers to the PNA as shown in Figure 1-1.
Page 16: Electrostatic Discharge Protection
Safety and Regulatory Information PNA Series Microwave Network Analyzers Electrostatic Discharge Protection N5224A and N5225A Electrostatic Discharge Protection Protection against electrostatic discharge (ESD) is essential while removing assemblies from or connecting cables to the network analyzer. Static electricity can build up on your body and can easily damage sensitive internal circuit elements when discharged.
Page 17: Regulatory Information
PNA Series Microwave Network Analyzers Safety and Regulatory Information N5224A and N5225A Regulatory Information Regulatory Information This section contains information that is required by various government regulatory agencies. Instrument Markings NOTE Some instrument markings may not appear on your analyzer.
Page 18: Lithium Battery Disposal
If the battery on the A21 CPU board assembly needs to be disposed of, dispose of it in accordance with your country’s requirements. If required, you may return the battery to Keysight Technologies for disposal. Refer “Contacting Keysight” on page 2-8 for assistance.
Page 19: General Product Information
General Product Information Service Guide N5225-90001...
Page 20: Information In This Chapter
The Internet address (URL) for on-line assistance. Service and support options available. Keysight Support, Services, and Page 2-8 Calibration options available. Assistance Important information about shipping your analyzer to Keysight for service or repair. Service Guide N5225-90001...
Page 21: Maintenance
PNA Series Microwave Network Analyzers General Product Information N5224A and N5225A Maintenance Maintenance Physical Maintenance WARNING To prevent electrical shock, disconnect the analyzer from the mains source before cleaning. Use a dry cloth or one slightly dampened with water to clean the external case parts. Do not attempt to clean internally.
Page 22: Analyzer Options, Accessories, And Upgrades Available
Analyzer Options, Accessories, and Upgrades Available To see a list of the options, accessories, and upgrades available for the network analyzers, including ordering information, refer to the Keysight PNA Family Microwave Network Analyzers Configuration Guide, available online at http://literature.cdn.keysight.com/litweb/pdf/5990-7745EN.pdf. Pulse I/O Adapter-N1966A An adapter for connecting between the analyzer’s rear-panel PULSE I/O connector and the coaxial inputs...
Page 23: Required Service Test Equipment
PNA Series Microwave Network Analyzers General Product Information N5224A and N5225A Required Service Test Equipment Required Service Test Equipment Recommended Alternate Model Critical Specifications Model or Part Equipment or Part Number Number Test Instruments and Software Compression U3070AK01 None specified...
Page 24 General Product Information PNA Series Microwave Network Analyzers Required Service Test Equipment N5224A and N5225A Recommended Alternate Model Critical Specifications Model or Part Equipment or Part Number Number Calibration and Verification Kits 2.4 mm calibration kit 85056A 85056D DC to 50 GHz DC to 50 GHz 2.4 mm verification kit...
Page 25 PNA Series Microwave Network Analyzers General Product Information N5224A and N5225A Required Service Test Equipment Recommended Alternate Critical Specifications Model or Part Equipment Model Number Number Tools T-8 TORX driver 0.6 N-m (5 in-lb) setting 0.5, 0.8, and 1.0 N-m...
Page 26: Keysight Support, Services, And Assistance
The analyzer’s standard warranty period is three years from the time of initial delivery. All repairs require the analyzer to be shipped to the nearest Keysight Technologies service center. Extended warranty periods can be purchased with the initial product purchase.
Page 27: Shipping Your Analyzer To Keysight For Service Or Repair
Shipping Your Analyzer to Keysight for Service or Repair IMPORTANT Keysight Technologies reserves the right to reformat or replace the internal solid state drive in your analyzer as part of its repair. This will erase all user information stored on the solid state drive.
Page 28 General Product Information PNA Series Microwave Network Analyzers Keysight Support, Services, and Assistance N5224A and N5225A 2-10 Service Guide N5225-90001...
Page 29: Tests And Adjustments
Tests and Adjustments Service Guide N5225-90001...
Page 30: Information In This Chapter
Tests and Adjustments PNA Series Microwave Network Analyzers Information in This Chapter N5224A and N5225A 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 31 PNA Series Microwave Network Analyzers Tests and Adjustments N5224A and N5225A Information in This Chapter Section Title Summary of Content Start Page Performing the operator’s check. Preliminary Checks Checking your test cables. Page 3-10 Perform these checks before performing system verification.
Page 32: Before You Begin
Tests and Adjustments PNA Series Microwave Network Analyzers Before You Begin N5224A and N5225A Before You Begin Before checking, verifying, or adjusting the analyzer, refer to the following paragraphs to: • make sure the operating environment is within its requirements •...
Page 33: Review The Principles Of Connector Care
Prior to making connections to your analyzer, carefully review the information about inspecting, cleaning, and gaging connectors. Refer to the calibration kit documentation for detailed connector care information. For course numbers about additional connector care instruction, contact Keysight Technologies. Refer to “Contacting Keysight” on page 2-8.
Page 34: About System Verification And Performance Tests
Tests and Adjustments PNA Series Microwave Network Analyzers About System Verification and Performance Tests N5224A and N5225A About System Verification and Performance Tests The performance of the network analyzer is specified in two ways: system specifications, and instrument specifications. It is the end user’s responsibility to determine which set of specifications is applicable to their use of the PNA.
Page 35: Performance Tests
If you have a measurement application that does not use all of the measurement capabilities of the analyzer, you may ask your local Keysight Technologies service office to verify only a subset of the specifications. However, this “limited calibration” creates the possibility of making inaccurate measurements if you then use the analyzer in an application requiring additional capabilities.
Page 36: Ansi/Ncsl Z540.3-2006 And Iso/Iec 17025 Verification
Tests and Adjustments PNA Series Microwave Network Analyzers ANSI/NCSL Z540.3–2006 and ISO/IEC 17025 Verification N5224A and N5225A ANSI/NCSL Z540.3–2006 and ISO/IEC 17025 Verification To meet the criteria for ANSI/NCSL Z540.3–2006 and ISO/IEC 17025, perform the preliminary checks and all performance tests without stopping to repair or adjust .
Page 37: Non-Standards Compliant Verification
PNA Series Microwave Network Analyzers Tests and Adjustments N5224A and N5225A Non-Standards Compliant Verification Non-Standards Compliant Verification To meet the criteria for non-standards compliant verification, perform the preliminary checks and the performance tests while stopping to troubleshoot. Refer to Figure 3-2 for test flow.
Page 38: Preliminary Checks
Tests and Adjustments PNA Series Microwave Network Analyzers Preliminary Checks N5224A and N5225A Preliminary Checks Preliminary checks include the following: • “The Operator’s Check” on page 3-10 The operator’s check tests the network analyzer’s basic functionality of the source, switch, and receivers.
Page 39 PNA Series Microwave Network Analyzers Tests and Adjustments N5224A and N5225A Preliminary Checks 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.
Page 40: The Test Port Cable Checks
Tests and Adjustments PNA Series Microwave Network Analyzers Preliminary Checks N5224A and N5225A The Test Port Cable Checks A faulty test port cable can cause a failure in the verification test. The following checks are not required, but are recommended to verify the performance of the test port cable.
Page 41 PNA Series Microwave Network Analyzers Tests and Adjustments N5224A and N5225A Preliminary Checks Cable Return Loss Check 1. Press UTILITY Preset 2. Perform a one-port calibration on Port 1, 1-Port Reflection. Refer to the embedded help in the analyzer if necessary.
Page 42 Tests and Adjustments PNA Series Microwave Network Analyzers Preliminary Checks N5224A and N5225A Cable Insertion Loss Check 1. With the test port cable still connected to Port 1, connect a short to the other end of the cable. 2. Press MARKER/ANALYSIS...
Page 43 PNA Series Microwave Network Analyzers Tests and Adjustments N5224A and N5225A Preliminary Checks Cable Magnitude and Phase Stability Check 1. With the test port cable still connected to Port 1, connect a short to the other end of the cable.
Page 44 Tests and Adjustments PNA Series Microwave Network Analyzers Preliminary Checks N5224A and N5225A Figure 3-6 Typical Cable Magnitude and Phase Stability Response If the Cable Magnitude and Phase Stability Check Fails 1. Clean the cable and devices and torque to specification. Repeat the check.
Page 45 PNA Series Microwave Network Analyzers Tests and Adjustments N5224A and N5225A Preliminary Checks Cable Connector Repeatability Check NOTE The connector repeatability measurement should be done at the test port as well as at the end of the test port cable.
Page 46 Tests and Adjustments PNA Series Microwave Network Analyzers Preliminary Checks N5224A and N5225A Figure 3-7 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.
Page 47: System Verification
PNA Series Microwave Network Analyzers Tests and Adjustments N5224A and N5225A System Verification System Verification System verification is used to verify system-level, error-corrected uncertainty limits for network analyzer measurements. The verification procedure is automated and is contained in the firmware of the analyzer.
Page 48: Measurement Uncertainty
Tests and Adjustments PNA Series Microwave Network Analyzers System Verification N5224A and N5225A 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.
Page 49: Measurement Traceability
This is accomplished by measuring the devices in an Keysight verification kit. The measurement of the devices in the verification kit has a traceable path because the factory system that...
Page 50: Performing System Verification
Tests and Adjustments PNA Series Microwave Network Analyzers System Verification N5224A and N5225A Performing System Verification The following verification procedure is automated by the analyzer firmware. The process for the verification • connect cables to the analyzer test ports • perform a calibration or recall a recent calibration •...
Page 51 It is highly recommended that the test port cables be regularly tested. 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...
Page 52 3-27. • File Tabular Data: Writes the tabular data to a text file in the Windows XP directory  C:\Program Files\Keysight\Network Analyzer\Documents\ or in the Windows 7 directory  C:\Users\Public\Public Documents\Network Analyzer\SysVer\. • File Graphs: Saves a screen image in PNG format in the Windows XP directory ...
Page 53 PNA Series Microwave Network Analyzers Tests and Adjustments N5224A and N5225A System Verification If the System Fails the Verification Test IMPORTANT Inspect all connections. Do not remove the cable from the analyzer test port. This will invalidate the calibration that you performed earlier.
Page 54 Tests and Adjustments PNA Series Microwave Network Analyzers System Verification N5224A and N5225A Interpreting the Verification Results Figure 3-11 shows an example of typical verification results with Print Tabular Data selected in the Printer Output area of the System Verification dialog box.
Page 55 PNA Series Microwave Network Analyzers Tests and Adjustments N5224A and N5225A System Verification Figure 3-12 shows an example of typical verification results with Print Graphs selected in the Printer Output area of the System Verification dialog box. The printed graphical results show the following: •...
Page 56: Performance Tests
Tests and Adjustments PNA Series Microwave Network Analyzers Performance Tests N5224A and N5225A Performance Tests The performance tests verify the electrical performance of your PNA. These performance tests are included in the analyzer’s firmware with Option 897 and Option 898. Your analyzer is automatically configured for each individual test.
Page 57: Source Power Accuracy Test
PNA Series Microwave Network Analyzers Tests and Adjustments N5224A and N5225A Performance Tests Source Power Accuracy Test Function of the Test: To confirm the accuracy of the source output power of your network analyzer over its full frequency range. Specification Tested: Test Port Output–Power Level Accuracy Equipment Used: •...
Page 58: Source Maximum Power Output Test
Tests and Adjustments PNA Series Microwave Network Analyzers Performance Tests N5224A and N5225A Source Maximum Power Output Test Function of the Test: To confirm the maximum source output power of your network analyzer over its full frequency range. Specification Tested: Test Port Output–Maximum Leveled Power Equipment Used: •...
Page 59: Source Power Linearity Test
PNA Series Microwave Network Analyzers Tests and Adjustments N5224A and N5225A Performance Tests Source Power Linearity Test Function of the Test: To verify that the power level is linear over the analyzer’s frequency range and to check the linearity of the automatic leveling control (ALC).
Page 60: Frequency Accuracy Test
Tests and Adjustments PNA Series Microwave Network Analyzers Performance Tests N5224A and N5225A Frequency Accuracy Test Function of the Test: To verify the frequency accuracy and range of the analyzer’s source output. Specification Tested: Test Port Output–CW Accuracy Equipment Used: •...
Page 61: Trace Noise Test
PNA Series Microwave Network Analyzers Tests and Adjustments N5224A and N5225A Performance Tests Trace Noise Test Function of the Test: To measure the stability of a signal in the internal source and receiver system of your analyzer. Specification Tested: Test Port Input–Trace Noise Magnitude and Trace Noise Phase Equipment Used: A test cable.
Page 62: Receiver Compression Test
Tests and Adjustments PNA Series Microwave Network Analyzers Performance Tests N5224A and N5225A 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: •...
Page 63 PNA Series Microwave Network Analyzers Tests and Adjustments N5224A and N5225A Performance Tests If the Analyzer Fails this Test: • Run the Receiver Characterization adjustment, and repeat this test. • If the analyzer still fails this test, replace the A23 mixer brick for a Port 1 or Port 2 failure or the A24 mixer brick for a Port 3 or Port 4 failure, then repeat this test.
Page 64: Noise Floor Test
Tests and Adjustments PNA Series Microwave Network Analyzers Performance Tests N5224A and N5225A Noise Floor Test Function of the Test: To measure the absolute power level of the noise floor for the analyzer’s receivers. Specification Tested: Test Port Input–Test Port Noise Floor Equipment Used: •...
Page 65: Calibration Coefficients Test
PNA Series Microwave Network Analyzers Tests and Adjustments N5224A and N5225A Performance Tests Calibration Coefficients Test Function of the Test: To verify the uncorrected calibration coefficients of your analyzer. The calibration coefficients are specified at the test port without any cables, so calibrations must be performed in both the forward and reverse directions to eliminate the effects of the test cable.
Page 66: Dynamic Accuracy Test
Tests and Adjustments PNA Series Microwave Network Analyzers Performance Tests N5224A and N5225A Dynamic Accuracy Test This description applies to all N522xA, N5231A/32A/34A/35A/39A, and N5247A instruments. Function of the Test: To measure the relative power linearity of the analyzer’s receivers.
Page 67: Adjustments
PNA Series Microwave Network Analyzers Tests and Adjustments N5224A and N5225A Adjustments Adjustments These adjustments are firmware-driven tests that are used to fine-tune your analyzer. If multiple adjustments are to be performed, perform them in the order listed. • “10 MHz Frequency Reference Adjustment” on page 3-40 •...
Page 68: 10 Mhz Frequency Reference Adjustment
Tests and Adjustments PNA Series Microwave Network Analyzers Adjustments N5224A and N5225A 10 MHz Frequency Reference Adjustment The 10 MHz frequency adjustment is used to adjust the frequency accuracy of the network analyzer’s 10 MHz frequency reference on the A14 frequency reference board assembly.
Page 69: If Gain Adjustment
PNA Series Microwave Network Analyzers Tests and Adjustments N5224A and N5225A Adjustments IF Gain Adjustment The IF gain adjustment is used to adjust the IF gain of the network analyzer. Procedure Service Adjustments 1. Press UTILITY System , then , then , then click IF Gain Adjustment.
Page 70: Source Adjustment
Tests and Adjustments PNA Series Microwave Network Analyzers Adjustments N5224A and N5225A Source Adjustment The source calibration is used to adjust your network analyzer for a flat source power across its full frequency range. There are differences between each test port; therefore, an adjustment is required for each port.
Page 71: Receiver Adjustment
PNA Series Microwave Network Analyzers Tests and Adjustments N5224A and N5225A Adjustments Receiver Adjustment The receiver calibration is used to adjust the network analyzer receivers for a flat response across its full frequency range: 1. A power meter/sensor is connected to Port 1, as shown in...
Page 72 Tests and Adjustments PNA Series Microwave Network Analyzers Adjustments N5224A and N5225A Figure 3-15 Equipment Setup 1 for the Receiver Adjustment Service Adjustments 2. Press UTILITY System , then , then , then click Receiver Adjustment. 3. Ensure the GPIB settings are correct.
Page 73 PNA Series Microwave Network Analyzers Tests and Adjustments N5224A and N5225A Adjustments Figure 3-17 Equipment Setup 3 for the Receiver Adjustment Service Guide N5225-90001 3-45...
Page 74: Receiver Characterization
Tests and Adjustments PNA Series Microwave Network Analyzers Adjustments N5224A and N5225A Receiver Characterization This characterizes the receivers in your analyzer. Procedure Service Adjustments 1. Press UTILITY System , then , then , then click Receiver Characterization. 2. Follow the instructions and prompts as they are displayed.
Page 75: Troubleshooting
Troubleshooting Service Guide N5225-90001...
Page 76: Information In This Chapter
Troubleshooting PNA Series Microwave Network Analyzers Information in This Chapter N5224A and N5225A 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 77: Conventions Used For Hardkeys, Softkeys, And Menu Items
PNA Series Microwave Network Analyzers Troubleshooting N5224A and N5225A Operating the Analyzer With Covers Removed Conventions Used for Hardkeys, Softkeys, and Menu Items The following conventions are used in this document: This represents a “hardkey”, a key that is physically located on the Hardkey instrument.
Page 78: 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 79 PNA Series Microwave Network Analyzers Troubleshooting N5224A and N5225A Getting Started with Troubleshooting Figure 4-1 Troubleshooting Organization Flowchart Go to “Power Up Troubleshooting” on page 4-6. Go to “Front Panel Troubleshooting” on page 4-13 Go to “Rear Panel Troubleshooting” on page 4-17 Go to “Measurement System...
Page 80: Power Up Troubleshooting
Troubleshooting PNA Series Microwave Network Analyzers Power Up Troubleshooting N5224A and N5225A Power Up Troubleshooting WARNING Immediately unplug the instrument from the ac power line if the unit shows any of the following symptoms: • Smoke, arcing, or unusual noise from inside the analyzer.
Page 81: Power Supply Check
PNA Series Microwave Network Analyzers Troubleshooting N5224A and N5225A Power Up Troubleshooting Power Supply Check NOTE There are no fuses to replace within the power supply. If you determine that the power supply is the failed assembly, replace the power supply.
Page 82 Troubleshooting PNA Series Microwave Network Analyzers Power Up Troubleshooting N5224A and N5225A Figure 4-2 A19 Midplane Board Power Supply LED Indicators and Measurement Points WARNING The instrument contains potentially hazardous voltages. Refer to the safety symbols provided on the instrument and in “General Safety Considerations”...
Page 83 PNA Series Microwave Network Analyzers Troubleshooting N5224A and N5225A Power Up Troubleshooting Table 4-1 Power Supply Measurement Points Expected Expected Test Point Supply Name Test Point Supply Name Level (Vdc) Level (Vdc)   TP517 Analog Ground TP516 5.2 V analog 5.2 ±0.1...
Page 84 Troubleshooting PNA Series Microwave Network Analyzers Power Up Troubleshooting N5224A and N5225A page 7-14). 7. Remove the A17 13.5 GHz synthesizer board (refer to “Removing and Replacing the A4–A17 Boards” on page 7-14). 8. Remove the A4 13.5 GHz synthesizer board, if present (refer to “Removing and Replacing the A4–A17...
Page 85 PNA Series Microwave Network Analyzers Troubleshooting N5224A and N5225A Power Up Troubleshooting If the Fans Are Not Operating CAUTION The power supply may be in thermal shutdown if the instrument has been operating without the fans running. Allow the instrument to cool down before troubleshooting.
Page 86: Troubleshooting Lcd Display Problems
Troubleshooting PNA Series Microwave Network Analyzers Power Up Troubleshooting N5224A and N5225A If the correct voltage is not present, suspect a defective A18 system motherboard. Refer to “Removing and Replacing the A18 System Motherboard” on page 7-16. Troubleshooting LCD Display Problems This procedure is intended to isolate the faulty assembly when the display is dark.
Page 87: Front Panel Troubleshooting
PNA Series Microwave Network Analyzers Troubleshooting N5224A and N5225A Front Panel Troubleshooting Front Panel Troubleshooting The front panel assembly consists of the A1 front panel interface board, the keypad, the A2 USB board, and the A3 display assembly. The following tests verify the operation of the front panel assembly when the analyzer is in the measurement mode.
Page 88 Troubleshooting PNA Series Microwave Network Analyzers Front Panel Troubleshooting N5224A and N5225A Checking the Front Panel Keys To check the front panel keys, push each key and compare the name in the Key Label box to the name physically labeled on the key cap. These names are also in Table 4-2 below.
Page 89: A3 Display Test
PNA Series Microwave Network Analyzers Troubleshooting N5224A and N5225A Front Panel Troubleshooting Checking the RPG (Front Panel Knob) To check the RPG knob: 1. Press the UTILITY key. Preset 1. Rotate the knob and check for a fluid movement of numbers on the analyzer display.
Page 90: Checking The A2 Usb Board
Troubleshooting PNA Series Microwave Network Analyzers Front Panel Troubleshooting N5224A and N5225A Checking the A2 USB Board To verify proper operation of the USB board: • Connect a known good USB device, such as a USB mouse, to a front panel USB port.
Page 91: Rear Panel Troubleshooting
PNA Series Microwave Network Analyzers Troubleshooting N5224A and N5225A Rear Panel Troubleshooting Rear Panel Troubleshooting Each rear panel connector is associated with a hardware group in the analyzer. You can use the data at these rear panel connectors to help troubleshoot these hardware groups in addition to testing the connectors.
Page 92: Lan Troubleshooting
Troubleshooting PNA Series Microwave Network Analyzers Rear Panel Troubleshooting N5224A and N5225A 6. On the left side of the window under folders: Measurement & Automation a. Click the plus sign to expand the folder. Measurement & Automation b. Click the plus sign to expand the folder.
Page 93 PNA Series Microwave Network Analyzers Troubleshooting N5224A and N5225A Rear Panel Troubleshooting Ping Command The analyzer has the built-in capability of performing a “ping” operation. Ping will request the analyzer to send a few bytes of information to a specific LAN device. That device will then signal the analyzer that it has received the information.
Page 94 Troubleshooting PNA Series Microwave Network Analyzers Rear Panel Troubleshooting N5224A and N5225A  Pinging 141.121.69.162 with 32 bytes of data:  Reply from 141.121.69.162: bytes=32 time<10ms TTL=127 Reply from 141.121.69.162: bytes=32 time<10ms TTL=127 Reply from 141.121.69.162: bytes=32 time<10ms TTL=127 Reply from 141.121.69.162: bytes=32 time<10ms TTL=127...
Page 95 PNA Series Microwave Network Analyzers Troubleshooting N5224A and N5225A Rear Panel Troubleshooting If neither function properly: • One or both IP addresses could be wrong. • One or both LAN states could be set to off. • The crossover cable could be miswired.
Page 96 Troubleshooting PNA Series Microwave Network Analyzers Rear Panel Troubleshooting N5224A and N5225A Table 4-3 LAN Pin Definitions and Wire Color Codes Pin Number Color Pin Number Color 1 (transmit +) White/orange White/blue   Orange Green 2 (transmit 6 (receive...
Page 97: Measurement System Troubleshooting
PNA Series Microwave Network Analyzers Troubleshooting N5224A and N5225A Measurement System Troubleshooting Measurement System Troubleshooting This section provides troubleshooting procedures for the measurement portion of the PNA. In this section, the analyzer is used as a tool to help isolate the suspected faulty functional group. Once the faulty functional group is determined, troubleshooting steps are provided to help you isolate the faulty assembly or part.
Page 98 , then Service Utilities View EEPROM Headers , then , then . Refer to Figure 4-6. If the information is incorrect for any of the PC boards, contact Keysight Technologies. Refer to “Contacting Keysight” on page 2-8. 4-24 Service Guide N5225-90001...
Page 99 PNA Series Microwave Network Analyzers Troubleshooting N5224A and N5225A Measurement System Troubleshooting Figure 4-6 EEPROM Header Info Dialog Window Error Messages SOURCE UNLEVELED: The source ALC circuit on the A23 test set motherboard is running open-loop. Check the cable connections for the A25 HMA26.5 and the A23 test set motherboard.
Page 100: Verifying The A, B, C, D, And R Traces (Standard S-Parameter Mode)
PNA Series Microwave Network Analyzers Measurement System Troubleshooting N5224A and N5225A 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: •...
Page 101 — Go to Chapter 3, “Tests and Adjustments” and perform all the tests in that section. — If a problem still exists, contact Keysight. Refer to “Contacting Keysight” on page 2-8. • If any of the traces are not present, are noisy or distorted, or are at an incorrect level, then there is a problem with the analyzer’s measurement system.
Page 102: Where To Begin Troubleshooting
Troubleshooting PNA Series Microwave Network Analyzers Measurement System Troubleshooting N5224A and N5225A 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 — A14 frequency reference —...
Page 103 Properties in the resulting pop-up menu. mouse button and then click 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.
Page 104: Checking The Source Group
Troubleshooting PNA Series Microwave Network Analyzers Measurement System Troubleshooting N5224A and N5225A Checking the Source Group Source Group Tests Before checking the source group assemblies, you must open the analyzer. CAUTION Use an antistatic work surface and wrist strap to reduce the chance of electrostatic discharge for all of the procedures in this chapter.
Page 105 PNA Series Microwave Network Analyzers Troubleshooting N5224A and N5225A Measurement System Troubleshooting Equipment Setup 1. Before starting these checks, zero and calibrate the power meter. (See the power meter user’s guide for instructions on setting the calibration factor.) 2. If the Receiver Display (...
Page 106 PNA Series Microwave Network Analyzers Measurement System Troubleshooting N5224A and N5225A 5. If the observed problem was frequency banded rather than broadband related, set the analyzer frequency to the center of the problem band. The spectrum analyzer should measure a signal above the network analyzer setting.
Page 107 PNA Series Microwave Network Analyzers Troubleshooting N5224A and N5225A Measurement System Troubleshooting the A26 splitter. Refer to “Removing and Replacing the A26 Splitter” on page 7-32. 7. If the signal is present, reconnect cables W53 and W54, and then continue with “Checking the Receiver...
Page 108 Troubleshooting PNA Series Microwave Network Analyzers Measurement System Troubleshooting N5224A and N5225A 7. If the signal is present, reconnect all cables, and then continue with “Checking the A7, A8, A12, and A13 50 GHz Doubler Outputs”. Checking the A7, A8, A12, and A13 50 GHz Doubler Outputs 1.
Page 109: Checking The Signal Separation Group
PNA Series Microwave Network Analyzers Troubleshooting N5224A and N5225A Measurement System Troubleshooting Checking the Signal Separation Group Before checking the signal separation group assemblies, you must open the analyzer. CAUTION Use an antistatic work surface and wrist strap to reduce the chance of electrostatic discharge for all of the procedures in this chapter.
Page 110 PNA Series Microwave Network Analyzers Measurement System Troubleshooting N5224A and N5225A Checking Port 1, 2, 3, or 4 Power Outputs (A, B, C, or D Signals) The object of this check is to verify the power of the output signal across the entire frequency range.
Page 111 PNA Series Microwave Network Analyzers Troubleshooting N5224A and N5225A Measurement System Troubleshooting Equipment Used for These Tests Model or  Alternate Model or Part Equipment Type Part Number Number Spectrum analyzer 8565E 856xE a. Must be capable of measuring a signal at 1 GHz.
Page 112 Troubleshooting PNA Series Microwave Network Analyzers Measurement System Troubleshooting N5224A and N5225A • Options 219 and 419 — Port 1; W82 of A38 — Port 2; W94 of A41 — Port 3; W86 of A39 — Port 4; W90 of A36 2.
Page 113: Checking The Receiver Group
PNA Series Microwave Network Analyzers Troubleshooting N5224A and N5225A Measurement System Troubleshooting Checking the Receiver Group Equipment Used for These Tests Model or  Alternate Model or Part Equipment Type Part Number Number Spectrum analyzer 8565E 856xE a. Refer to the IMPORTANT notice on page 4-23.
Page 114 Troubleshooting PNA Series Microwave Network Analyzers Measurement System Troubleshooting N5224A and N5225A Checking the A27 and A28 Mixer Brick Receiver Outputs Set the network analyzer for an S measurement with a CW frequency of 1 GHz. 1. Locate the following flexible cables at the receiver IF outputs of the mixer brick(s).
Page 115 PNA Series Microwave Network Analyzers Troubleshooting N5224A and N5225A Measurement System Troubleshooting 3. If the measured signal is not present, replace the A37 reference mixer switch. Refer to “Removing and Replacing the A37 Reference Mixer Switch” on page 7-40. Checking the A46, A47, A48, and A49 35-dB Receiver Step Attenuators 1.
Page 116 Troubleshooting PNA Series Microwave Network Analyzers Measurement System Troubleshooting N5224A and N5225A A4–A17 Boards” on page 7-14. 6. If the measured signal is not present, replace the A24 IF multiplexer board. Refer to “Removing and Replacing the A24 IF Multiplexer Board” on page 7-28.
Page 117 N5224A/25A 2-Port Overall Block Diagram (Includes Options 200-Standard; 201-Configurable Test Set; 217-Attenuators; and 219-Bias Tees) Service Guide: N5225-90001 DISPLAY USB BD A24 IF MULTIPLEXER A16 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 118: Instrument Block Diagrams Sheet 1
Troubleshooting PNA Series Microwave Network Analyzers Instrument Block Diagrams Sheet 1 N5224A and N5225A 4-44 Service Guide N5225-90001...
Page 119 N5224A/25A 4-Port Overall Block Diagram (Includes Options 400-Standard; 401-Configurable Test Set; 4 17-Attenuators; and 419-Bias Tees Service Guide: N5225-90001 DISPLAY USB BD A24 IF MULTIPLEXER A16 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 120: Instrument Block Diagrams Sheet 2
Troubleshooting PNA Series Microwave Network Analyzers Instrument Block Diagrams Sheet 2 N5224A and N5225A 4-46 Service Guide N5225-90001...
Page 121: Theory Of Operation
Theory of Operation Service Guide N5225-90001...
Page 122: Information In This Chapter
Theory of Operation PNA Series Microwave Network Analyzers Information in This Chapter N5224A and N5225A Information in This Chapter This chapter provides a general description of the operating theory of the N522xA 2-port and 4-port PNA microwave network analyzers. • Theory of operation is explained to the assembly level only.
Page 123: Network Analyzer System Operation
PNA Series Microwave Network Analyzers Theory of Operation N5224A and N5225A Network Analyzer System Operation Network Analyzer System Operation The PNA network analyzer generates two (2-port models) or four (4-port models) phase-locked incident signals and an LO signal from the internal synthesized source. By means of signal separation, the incident signals are divided into reference signals and test signals.
Page 124: Functional Groups Of The Network Analyzer
Theory of Operation PNA Series Microwave Network Analyzers Network Analyzer System Operation N5224A and N5225A Figure 5-2 2-Port System Simplified Block Diagram Functional Groups of the Network Analyzer The operation of the network analyzer can be separated into major functional groups. Each group consists of assemblies that perform a distinct function in the instrument.
Page 125 PNA Series Microwave Network Analyzers Theory of Operation N5224A and N5225A Network Analyzer System Operation Synthesized Source Group The built-in synthesized source generates a swept, stepped, or continuous wave (CW) signal in the frequency ranges as listed in the Data Sheet and Technical Specifications documents, available online at: http://literature.cdn.keysight.com/litweb/pdf/N5224-90001.pdf...
Page 126 Theory of Operation PNA Series Microwave Network Analyzers Network Analyzer System Operation N5224A and N5225A Signal Separation Group Each of the incident signals from the source group is separated into a reference path and a test path. The reference signal is transmitted to the receiver group. The test signal is transmitted through—and reflected from—the DUT and is then transmitted to the receiver group.
Page 127: Synthesized Source Group Operation
PNA Series Microwave Network Analyzers Theory of Operation N5224A and N5225A Synthesized Source Group Operation Synthesized Source Group Operation The source group produces a stable output signal by phase locking a synthesized voltage-controlled oscillator (VCO). For the full frequency range of the source, refer to the Data Sheet and Technical Specifications documents, available online at: http://literature.cdn.keysight.com/litweb/pdf/N5224-90001.pdf...
Page 128 PNA Series Microwave Network Analyzers Synthesized Source Group Operation N5224A and N5225A The A4, A15, and A17 13.5 GHz synthesizer boards each contain their own phase lock circuitry. The A15 board produces an independently phase locked LO signal while the A4 and A17 boards produce independently phase locked test signals.
Page 129 PNA Series Microwave Network Analyzers Theory of Operation N5224A and N5225A Synthesized Source Group Operation Figure 5-3 Source Group Service Guide N5225-90001...
Page 130 Theory of Operation PNA Series Microwave Network Analyzers Synthesized Source Group Operation N5224A and N5225A Table 5-1 Subsweep Frequencies ➊ ➋ ➌ ➍ ➎ Mixer Brick L.O. A4/A17 A5/A10 A7/A8/A12/A13 Band Harm. Synthesizer HMA26.5 Synthesizer Source 50GHz Doubler Nmbr. Frequency (GHz)
Page 131: A4, A15, And A17 13.5 Ghz Synthesizer Boards
PNA Series Microwave Network Analyzers Theory of Operation N5224A and N5225A Synthesized Source Group Operation A4, A15, and A17 13.5 GHz Synthesizer Boards The A17 13.5 GHz synthesizer board is included only on 4-port models. The A4, A15, and A17 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.
Page 132: A7, A8, A12, And A13 50 Ghz Doubler Boards
Theory of Operation PNA Series Microwave Network Analyzers Synthesized Source Group Operation N5224A and N5225A A7, A8, A12, and A13 50 GHz Doubler Boards The A12 and A13 50 GHz doubler boards are included only on 4-port models. Refer to...
Page 133: A23 Test Set Motherboard
PNA Series Microwave Network Analyzers Theory of Operation N5224A and N5225A Synthesized Source Group Operation Rear-Panel Interconnects 10 MHz REF INPUT A BNC connector that allows an external frequency reference signal to be used to phase lock the analyzer for increased frequency accuracy.
Page 134 Theory of Operation PNA Series Microwave Network Analyzers Synthesized Source Group Operation N5224A and N5225A Table 5-2 TEST SET I/O Connector Pin Assignments DB-25 Female Connector Pin Numbers Name Function SEL0 TTL out, test set select bit 0, tied to 0 V...
Page 135 PNA Series Microwave Network Analyzers Theory of Operation N5224A and N5225A Synthesized Source Group Operation Table 5-3 HANDLER I/O Connector Pin Assignments Rectangular 36-Pin Female Connector Pin Numbers Name Function 0 V, ground reference  INPUT1 TTL in, negative pulse (1 s min) latches OUTPUT1-2 3–4...
Page 136 Theory of Operation PNA Series Microwave Network Analyzers Synthesized Source Group Operation N5224A and N5225A Table 5-4 PWR I/O Connector Pin Assignments DB-9 Female Connector Name Description +15V +15 V @ 400 mA -15V -15 V @ 400 mA AnalogOut1 Analog Output Voltage...
Page 137: Signal Separation Group Operation
PNA Series Microwave Network Analyzers Theory of Operation N5224A and N5225A Signal Separation Group Operation Signal Separation Group Operation The signal separation group divides the source incident signals into a reference path and a test path. Refer Figure 5-4 on page 5-19 Figure 5-5 on page 5-20.
Page 138: A29-A32 Receiver Couplers
Theory of Operation PNA Series Microwave Network Analyzers Signal Separation Group Operation N5224A and N5225A +30 dBm. You can make measurements in the forward, reverse, or both directions and still achieve these high power levels. High Dynamic Range Measurement Configuration With a few jumper changes, you can configure the measurement configuration for higher dynamic range measurements.
Page 139 PNA Series Microwave Network Analyzers Theory of Operation N5224A and N5225A Signal Separation Group Operation Figure 5-4 4-Port Signal Separation Group Service Guide N5225-90001 5-19...
Page 140 Theory of Operation PNA Series Microwave Network Analyzers Signal Separation Group Operation N5224A and N5225A Figure 5-5 2-Port Signal Separation Group 5-20 Service Guide N5225-90001...
Page 141: Receiver Group Operation
PNA Series Microwave Network Analyzers Theory of Operation N5224A and N5225A Receiver Group Operation Receiver Group Operation The receiver group measures and processes the input signals into digital information for processing and eventual display. Figure 5-6 on page 5-24 Figure 5-7 on page 5-25 are simplified block diagrams of the receiver functional group for 2-port and 4-port models.
Page 142: A16 Spam Board (Analog Description)
PNA Series Microwave Network Analyzers Receiver Group Operation N5224A and N5225A The A27 mixer brick sends the EXT TSET DRIVE LO OUT signal to a rear-panel connector for use with an external test set. This same output connector on the A28 mixer brick is terminated.
Page 143 PNA Series Microwave Network Analyzers Theory of Operation N5224A and N5225A Receiver Group Operation Table 5-5 PULSE I/O Connector Pin Assignments DB-15 Female Connector Name Description IFGateAin IF pulse gate input A (TTL) IFGateBin IF pulse gate input B (TTL)
Page 144 Theory of Operation PNA Series Microwave Network Analyzers Receiver Group Operation N5224A and N5225A Figure 5-6 4-Port Receiver Group 5-24 Service Guide N5225-90001...
Page 145 PNA Series Microwave Network Analyzers Theory of Operation N5224A and N5225A Receiver Group Operation Figure 5-7 2-Port Receiver Group Service Guide N5225-90001 5-25...
Page 146: Digital Processing And Digital Control Group Operation
Theory of Operation PNA Series Microwave Network Analyzers Digital Processing and Digital Control Group Operation N5224A and N5225A Digital Processing and Digital Control Group Operation The digital processor and control group provides digital control for the entire analyzer. It provides: •...
Page 147 PNA Series Microwave Network Analyzers Theory of Operation N5224A and N5225A Digital Processing and Digital Control Group Operation Figure 5-8 Digital Processing and Digital Control Group Service Guide N5225-90001 5-27...
Page 148: Front Panel Subgroup
Theory of Operation PNA Series Microwave Network Analyzers Digital Processing and Digital Control Group Operation N5224A and N5225A Front Panel Subgroup The front panel subgroup contains the following assemblies: • A1 Front Panel Display Board • A2 USB Board •...
Page 149 PNA Series Microwave Network Analyzers Theory of Operation N5224A and N5225A Digital Processing and Digital Control Group Operation • A16 SPAM Board (Digital Description) • A21 CPU Board (including rear-panel interconnects) • A55 Solid State Drive (SSD) A16 SPAM Board (Digital Description) The A16 SPAM board contains digital and analog circuitry.
Page 150 Theory of Operation PNA Series Microwave Network Analyzers Digital Processing and Digital Control Group Operation N5224A and N5225A Rear Panel Interconnects The rear panel includes the following interfaces: USB x4 Four universal serial bus (USB) jacks (industry standard 4-pin connectors).
Page 151: Power Supply Group Operation
PNA Series Microwave Network Analyzers Theory of Operation N5224A and N5225A Power Supply Group Operation Power Supply Group Operation The A20 power supply assembly is a switching power supply operating at 103 kHz switching frequency. The input power ranges for the power supply are 90 to 132 Vac or 195 to 250 Vac. The power supply automatically senses the input voltage and switches between these two ranges.
Page 152 Theory of Operation PNA Series Microwave Network Analyzers Power Supply Group Operation N5224A and N5225A 5-32 Service Guide N5225-90001...
Page 153: Replaceable Parts
Replaceable Parts Service Guide N5225-90001...
Page 154 Replaceable Parts PNA Series Microwave Network Analyzers N5224A and N5225A This page is intentionally left blank. Service Guide N5225-90001...
Page 155: Information In This Chapter
Information in This Chapter This chapter: • identifies the replaceable parts for the Keysight PNA series microwave network analyzer. • includes several tables and illustrations to assist you in identifying the correct part for your analyzer. • contains ordering information for new assemblies and rebuilt-exchange assemblies.
Page 156: Ordering Information
To order a part listed in the replaceable parts lists: • include the part number • indicate the quantity required • Contact Keysight Technologies for instructions on where to send the order. Refer to “Contacting Keysight” on page 2-8. To order a part that is not listed in the replaceable parts lists: •...
Page 157: Rebuilt-Exchange Assemblies
PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Rebuilt-Exchange Assemblies Rebuilt-Exchange Assemblies Under the rebuilt-exchange assembly program: • Certain factory-repaired and tested assemblies are available on a trade-in basis. • Exchange assemblies are offered for lower cost than a new assembly, but meet all factory specifications required of a new assembly.
Page 158: Replaceable Parts Listings
Replaceable Parts Listings N5224A and N5225A Replaceable Parts Listings This section contains the replacement part numbers and their descriptions for your Keysight microwave PNA. You can find the locations of replaceable parts in this section: • listed by reference designator in...
Page 159 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Table 6-1 Part Number Listing by Reference Designator (Continued) Reference Designator Description Location Testset motherboard IF multiplexer board Your option set determines which LO Multiplier/amplifier 26.5 (HMA26.5) assemblies are in your PNA.
Page 160 Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Table 6-1 Part Number Listing by Reference Designator (Continued) Reference Designator Description Location Test port 1 6-dB attenuator Test port 3 6-dB attenuator Your option set determines which Test port 4 6-dB attenuator assemblies are in your PNA.
Page 161 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Table 6-2 Part Number Listing by Type of Part Assemblies and Cables • “Front Panel Assembly, Front Side, All Options” on page 6-10 • “Front Panel Assembly, Back Side, All Options” on page 6-12 •...
Page 162: Front Panel Assembly, Front Side, All Options
Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Front Panel Assembly, Front Side, All Options NOTE The N5245-60024 (Was N5247-60004) 2-port front panel assembly and the N5245-60022 (Was N5247-60005) 4-port front panel assembly contain the items shown in the following table.
Page 163 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-2 Front Panel Assembly, Front Side, All Options Service Guide N5225-90001 6-11...
Page 164: Front Panel Assembly, Back Side, All Options
Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Front Panel Assembly, Back Side, All Options Reference Designator Part Number Qty Description N5240-60065  Front panel interface board Was N5240-60046 N5240-60063 USB board Was N5240-60047 Ribbon cable, 60-wire, A18 system motherboard J9 to A1 front panel...
Page 165 8121-1451 (Tube) critical footnote a. In March 2013, Keysight discontinued using a display with florescent tube backlighting, and began using a display with LED backlighting. Associated parts are indicated in this table with either “Tube” or “LED.” If you replace an old part number <designated “Tube”>...
Page 166 Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Figure 6-4 A3 Display Assembly with Old LCD Display 2090-0883 6-14 Service Guide N5225-90001...
Page 167 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-5 A3 Display Assembly with New LCD Display 2090-1036 Service Guide N5225-90001 6-15...
Page 168: Top Assemblies And Cables, All Options
- to be used with the 2.0 GHz CPU board W1312-60196, System CPU N8983A version 6 ➀ 1420-0356 Battery, lithium manganese dioxide, 3V, 0.22A-hr. ➁ 1810-0118 50-ohm load a. For the latest information on CPUs and associated drives, visit na.support.keysight.com/pna/hdnumbers.html. 6-16 Service Guide N5225-90001...
Page 169 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings b. The A55 hard disk drive is located inside the A21 CPU board assembly. Refer to “Removing and Replacing the A1–A3 and Other Front Panel Subassemblies” on page 7-10 for an illustration.
Page 170 Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Figure 6-6 Top Assemblies, All Options 6-18 Service Guide N5225-90001...
Page 171 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings This page is intentionally left blank. Service Guide N5225-90001 6-19...
Page 172 Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Top Cables, All Cables—All Options Ref. Part Number Qty Description Type Desig. A4 13.5 GHz (source 1) synthesizer board J1207 to A5 26.5 GHz  N5245-20114 source (1) board P1 N5245-20100 A10 source (2) P1 to A17 13.5 GHz source (2) synthesizer J1207...
Page 173 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-7 Top Cables, All Cables—All Options Service Guide N5225-90001 6-21...
Page 174: 2-Port Configuration, Option 200
Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A 2-Port Configuration, Option 200 Bottom Assemblies, Standard 2-Port Configuration, Option 200 Reference Designator Part Number Description N5245-60157 Test set motherboard Was N5247-60001 N5240-60062 IF multiplexer board 5087-7765 LO Multiplier/amplifier 26.5 (HMA26.5)
Page 175 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-8 Bottom Assemblies, Standard 2-Port Configuration, Option 200 Service Guide N5225-90001 6-23...
Page 176 Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Bottom RF Cables, Standard 2-Port Configuration, Option 200 Reference Designator Type Part Number Qty Description N5245-20109 A29 port 1 receiver coupler to W11 N5245-20111 A32 port 2 receiver coupler to W17...
Page 177 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-9 Bottom RF Cables, Standard 2-Port Configuration, Option 200 Service Guide N5225-90001 6-25...
Page 178 Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Bottom Ribbon Cables and Wire Harnesses, Standard 2-Port Configuration, Option 200 Reference Designator Type Part Number Description ➀ N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301 ➁...
Page 179 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-10 Bottom Ribbon Cables and Wire Harnesses, Standard 2-Port Configuration, Option 200 Service Guide N5225-90001 6-27...
Page 180: 2-Port Configuration, Option 201
Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A 2-Port Configuration, Option 201 Bottom Assemblies, 2-Port, Option 201 Reference Designator Part Number Description N5245-60157 Test set motherboard Was N5247-60001 N5240-60062 IF multiplexer board 5087-7765 LO Multiplier/amplifier 26.5 (HMA26.5) 5087-7323...
Page 181 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-11 Bottom Assemblies, 2-Port, Option 201 Service Guide N5225-90001 6-29...
Page 182 Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Bottom RF Cables, 2-Port, Option 201 Reference Designator Type Part Number Qty Description N5245-20109 A29 port 1 receiver coupler to W11 N5245-20111 A32 port 2 receiver coupler to W17...
Page 183 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-12 Bottom RF Cables, 2-Port, Option 201 Service Guide N5225-90001 6-31...
Page 184 Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 201 Reference Designator Type Part Number Description ➀ N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301 ➁...
Page 185 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-13 Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 201 Service Guide N5225-90001 6-33...
Page 186: 2-Port Configuration, Option 210
Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A 2-Port Configuration, Option 210 Bottom Assemblies, 2-Port, Option 210 Reference Designator Part Number Description N5245-60157 Test set motherboard Was N5247-60001 N5240-60062 IF multiplexer board 5087-7765 LO Multiplier/amplifier 26.5 (HMA26.5) 5087-7323...
Page 187 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-14 Bottom Assemblies, 2-Port, Option 210 Service Guide N5225-90001 6-35...
Page 188 Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Bottom RF Cables, 2-Port, Option 210 Reference Designator Type Part Number Qty Description N5245-20109 A29 port 1 receiver coupler to W11 N5245-20111 A32 port 2 receiver coupler to W17...
Page 189 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-15 Bottom RF Cables, 2-Port, Option 210 Service Guide N5225-90001 6-37...
Page 190 Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 210 Reference Designator Type Part Number Description ➀ N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301 ➁...
Page 191 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-16 Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 210 Service Guide N5225-90001 6-39...
Page 192: 2-Port Configuration, Option 217
Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A 2-Port Configuration, Option 217 Bottom Assemblies, 2-Port, Option 217 Reference Designator Part Number Description N5245-60157 Test set motherboard Was N5247-60001 N5240-60062 IF multiplexer board 5087-7765 LO Multiplier/amplifier 26.5 (HMA26.5) 5087-7323...
Page 193 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-17 Bottom Assemblies, 2-Port, Option 217 Service Guide N5225-90001 6-41...
Page 194 Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Bottom RF Cables, 2-Port, Option 217 Reference Designator Type Part Number Qty Description N5245-20050 A29 port 1 receiver coupler to W11 N5245-20049 A32 port 2 receiver coupler to W17...
Page 195 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-18 Bottom RF Cables, 2-Port, Option 217 Service Guide N5225-90001 6-43...
Page 196 Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 217 Reference Designator Type Part Number Description ➀ N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301 ➁...
Page 197 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-19 Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 217 Service Guide N5225-90001 6-45...
Page 198: 2-Port Configuration, Option 219
Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A 2-Port Configuration, Option 219 Bottom Assemblies, 2-Port Configuration, Option 219 Reference Designator Part Number Description N5245-60157 Test set motherboard Was N5247-60001 N5240-60062 IF multiplexer board 5087-7765 LO Multiplier/amplifier 26.5 (HMA26.5) 5087-7323...
Page 199 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-20 Bottom Assemblies, 2-Port, Option 219 Service Guide N5225-90001 6-47...
Page 200 Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Bottom RF Cables, 2-Port, Option 219 Reference Designator Type Part Number Qty Description N5245-20050 A29 port 1 receiver coupler to W11 N5245-20049 A32 port 2 receiver coupler to W17...
Page 201 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-21 Bottom RF Cables, 2-Port, Option 219 Service Guide N5225-90001 6-49...
Page 202 Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 219 Reference Designator Type Part Number Description ➀ N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301 ➁...
Page 203 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-22 Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 219 Service Guide N5225-90001 6-51...
Page 204: 4-Port Configuration, Option 400
Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A 4-Port Configuration, Option 400 Bottom Assemblies, Standard 4-Port Configuration, Option 400 Reference Designator Part Number Description N5245-60157 Test set motherboard Was N5247-60001 N5240-60062 IF multiplexer board 5087-7765 LO Multiplier/amplifier 26.5 (HMA26.5)
Page 205 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-23 Bottom Assemblies, Standard 4-Port Configuration, Option 400 Service Guide N5225-90001 6-53...
Page 206 Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Bottom RF Cables, Standard 4-Port Configuration, Option 400 Reference Designator Type Part Number Qty Description N5245-20109 A29 port 1 receiver coupler to W11 N5245-20043 A30 port 3 receiver coupler to W13...
Page 207 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-24 Bottom RF Cables, Standard 4-Port Configuration, Option 400 Service Guide N5225-90001 6-55...
Page 208 Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Bottom Ribbon Cables and Wire Harnesses, Standard 4-Port Configuration, Option 400 Reference Designator Type Part Number Description ➀ N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301 ➁...
Page 209 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-25 Bottom Ribbon Cables and Wire Harnesses, Standard 4-Port Configuration, Option 400 Service Guide N5225-90001 6-57...
Page 210: 4-Port Configuration, Option 401
Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A 4-Port Configuration, Option 401 Bottom Assemblies, 4-Port, Option 401 Reference Designator Part Number Description N5245-60157 Test set motherboard Was N5247-60001 N5240-60062 IF multiplexer board 5087-7765 LO Multiplier/amplifier 26.5 (HMA26.5)
Page 211 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-26 Bottom Assemblies, 4-Port, Option 401 Service Guide N5225-90001 6-59...
Page 212 Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Bottom RF Cables, 4-Port, Option 401 Reference Designator Type Part Number Qty Description N5245-20109 A29 port 1 receiver coupler to W11 N5245-20043 A30 port 3 receiver coupler to W13...
Page 213 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-27 Bottom RF Cables, 4-Port, Option 401 Service Guide N5225-90001 6-61...
Page 214 Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 401 Reference Designator Type Part Number Description ➀ N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301 ➁...
Page 215 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-28 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 401 Service Guide N5225-90001 6-63...
Page 216: 4-Port Configuration, Option 410
Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A 4-Port Configuration, Option 410 Bottom Assemblies, 4-Port, Option 410 Reference Designator Part Number Description N5245-60157 Test set motherboard Was N5247-60001 N5240-60062 IF multiplexer board 5087-7765 LO Multiplier/amplifier 26.5 (HMA26.5)
Page 217 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-29 Bottom Assemblies, 4-Port, Option 410 Service Guide N5225-90001 6-65...
Page 218 Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Bottom RF Cables, 4-Port, Option 410 Reference Designator Type Part Number Qty Description N5245-20109 A29 port 1 receiver coupler to W11 N5245-20043 A30 port 3 receiver coupler to W13...
Page 219 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-30 Bottom RF Cables, 4-Port, Option 410 Service Guide N5225-90001 6-67...
Page 220 Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 410 Reference Designator Type Part Number Description ➀ N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301 ➁...
Page 221 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-31 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 410 Service Guide N5225-90001 6-69...
Page 222: 4-Port Configuration, Option 417
Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A 4-Port Configuration, Option 417 Bottom Assemblies, 4-Port, Option 417 Reference Designator Part Number Description N5245-60157 Test set motherboard Was N5247-60001 N5240-60062 IF multiplexer board 5087-7765 LO Multiplier/amplifier 26.5 (HMA26.5)
Page 223 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-32 Bottom Assemblies, 4-Port, Option 417 Service Guide N5225-90001 6-71...
Page 224 Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Bottom RF Cables, 4-Port, Option 417 (Ports 1 and 2) Reference Designator Type Part Number Qty Description N5245-20050 A29 port 1 receiver coupler to W11 N5245-20049 A32 port 2 receiver coupler to W17...
Page 225 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-33 Bottom RF Cables, 4-Port, Option 417 (Ports 1 and 2) Service Guide N5225-90001 6-73...
Page 226 Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Bottom RF Cables, 4-Port, Option 417 (Ports 3 and 4) Reference Designator Type Part Number Qty Description N5245-20043 A30 port 3 receiver coupler to W13 N5245-20044 A31 port 4 receiver coupler to W15...
Page 227 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-34 Bottom RF Cables, 4-Port, Option 417 (Ports 3 and 4) Service Guide N5225-90001 6-75...
Page 228 Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 417 Reference Designator Type Part Number Description ➀ N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301 ➁...
Page 229 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-35 Bottom Ribbon Cables & Wire Harnesses, 4-Port, Option 417 Service Guide N5225-90001 6-77...
Page 230: 4-Port Configuration, Option 419
Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A 4-Port Configuration, Option 419 Bottom Assemblies, 4-Port, Option 419 Reference Designator Part Number Description N5245-60157 Test set motherboard Was N5247-60001 N5240-60062 IF multiplexer board 5087-7765 LO Multiplier/amplifier 26.5 (HMA26.5)
Page 231 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-36 Bottom Assemblies, 4-Port, Option 419 Service Guide N5225-90001 6-79...
Page 232 Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Bottom RF Cables, 4-Port, Option 419 (Ports 1 and 2) Reference Designator Type Part Number Qty Description N5245-20050 A29 port 1 receiver coupler to W11 N5245-20049 A32 port 2 receiver coupler to W17...
Page 233 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-37 Bottom RF Cables, 4-Port, Option 419 (Ports 1 and 2) Service Guide N5225-90001 6-81...
Page 234 Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Bottom RF Cables, 4-Port, Option 419 (Ports 3 and 4) Reference Designator Type Part Number Qty Description N5245-20043 A30 port 3 receiver coupler to W13 N5245-20044 A31 port 4 receiver coupler to W15...
Page 235 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-38 Bottom RF Cables, 4-Port, Option 419 (Ports 3 and 4) Service Guide N5225-90001 6-83...
Page 236 Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 419 Reference Designator Type Part Number Description ➀ N5242-60005 Rear-panel PWR I/O to A23 test set motherboard J301 ➁...
Page 237 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-39 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 419 Service Guide N5225-90001 6-85...
Page 238: Rear Panel Assembly, All Options
Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Rear Panel Assembly, All Options Part Item Number Number Description ➀ N5245-00028 Power supply rear panel bracket Machine screw, M3.0 x 8, pan head (To attach: CPU assy to ejector arms ➁...
Page 239 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Part Item Number Number Description 8120-5063 BNC cable Figure 6-40 Rear Panel Assembly, All Options Service Guide N5225-90001 6-87...
Page 240: Fan Assemblies, All Options
Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Fan Assemblies, All Options Reference Designator Part Number Description 3160-4199 3160-0281  ➀ Fan guard Was 3160-4198 ➁ 0361-1272 Fan rivet ➂ N5245-00006 Fan bracket (for 2 fans) ➃...
Page 241 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-41 Fan Assemblies, Side View, All Options Service Guide N5225-90001 6-89...
Page 242: Top Hardware And Miscellaneous Parts, All Options
Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Top Hardware and Miscellaneous Parts, All Options Reference Designator Part Number Description ➀ W1312-00062 Bracket, power supply Machine screw, M3.0 x 16, pan head (To attach midplane board to midplane ➁...
Page 243 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-42 Top Hardware and Miscellaneous Parts, Top View, All Options Service Guide N5225-90001 6-91...
Page 244: Bottom Hardware And Miscellaneous Parts
Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Bottom Hardware and Miscellaneous Parts Reference Designator Part Number Description ① 0515-1227 Machine screw, M3.0 x 6, flat head (To attach test set front sub panel.) ➁...
Page 245 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-43 Bottom Hardware and Miscellaneous Parts Service Guide N5225-90001 6-93...
Page 246: Internal Hardware And Miscellaneous Parts, All Options
Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A Internal Hardware and Miscellaneous Parts, All Options Reference Part Number Description Designator ➀ N5247-00016 Left side inner bracket ➁ W1312-00048 Midplane bracket ➂ N5247-00015 Right side inner bracket ➃...
Page 247 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-44 Internal Hardware and Miscellaneous Parts, All Options Service Guide N5225-90001 6-95...
Page 248: External Hardware And Miscellaneous Parts, All Options
Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A External Hardware and Miscellaneous Parts, All Options Reference Designator Part Number Description ➀ N5245-00018 Outer cover ➁ 5041-9611 Rear foot ➂ 0515-1619 Machine screw M4.0 x 25, pan head (To attach rear foot.) ➄...
Page 249 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Figure 6-45 External Hardware and Miscellaneous Parts, All Options Service Guide N5225-90001 6-97...
Page 250: Miscellaneous Part Numbers
Documentation Installation and Quick Start Guide (for all PNA series analyzers) (Cannot be ordered. Part number is for reference only. Must be printed from the Keysight Web site. Refer to “Printing E8356-90001 Copies of Documentation from the Web” on page iii.) Service Guide.
Page 251 PNA Series Microwave Network Analyzers Replaceable Parts N5224A and N5225A Replaceable Parts Listings Table 6-3 Part Numbers for Miscellaneous Parts and Accessories (Continued) Model or Part Description Number Analyzer Accessories Pulse I/O Adapter (For connecting between the analyzer’s rear-panel PULSE I/O connector...
Page 252 Replaceable Parts PNA Series Microwave Network Analyzers Replaceable Parts Listings N5224A and N5225A 6-100 Service Guide N5225-90001...
Page 253: Repair And Replacement Procedures
Repair and Replacement Procedures Service Guide N5225-90001...
Page 254: Information In This Chapter
PNA Series Microwave Network Analyzers Information in This Chapter N5224A and N5225A 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...
Page 255: Personal Safety Warnings
PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5224A and N5225A Personal Safety Warnings Personal Safety Warnings WARNING These servicing instructions are for use by qualified personnel only. To avoid electrical shock, do not perform any servicing unless you are qualified to do so.
Page 256: Removal And Replacement Procedures
Repair and Replacement Procedures PNA Series Microwave Network Analyzers Removal and Replacement Procedures N5224A and N5225A Removal and Replacement Procedures Table 7-1 List of Procedures Reference Designator Assembly Description Location Covers, outer and inner Page 7-6 Page 7-52 Fan bracket and fans...
Page 257 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5224A and N5225A Removal and Replacement Procedures Table 7-1 List of Procedures (Continued) Reference Designator Assembly Description Location Page 7-38 A33 Port 1 test port coupler A34 Port 3 test port coupler...
Page 258: Removing The Covers
Repair and Replacement Procedures PNA Series Microwave Network Analyzers Removing the Covers N5224A and N5225A Removing the Covers Tools Required • T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) • T-20 TORX driver (torque to 21 in-lb or 2.38 N.m)
Page 259 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5224A and N5225A Removing the Covers Figure 7-1. Outer and Inner Cover Removal Service Guide N5225-90001...
Page 260: Removing And Replacing The Front Panel Assembly
Repair and Replacement Procedures PNA Series Microwave Network Analyzers Removing and Replacing the Front Panel Assembly N5224A and N5225A Removing and Replacing the Front Panel Assembly Tools Required • 9 mm nutsetter or open end wrench torque wrench (torque to 21 in-lb or 2.38 N.m) •...
Page 261 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5224A and N5225A Removing and Replacing the Front Panel Assembly Figure 7-2 Front Panel Assembly Removal Service Guide N5225-90001...
Page 262: Removing And Replacing The A1-A3 And Other Front Panel Subassemblies
Repair and Replacement Procedures PNA Series Microwave Network Analyzers Removing and Replacing the A1–A3 and Other Front Panel Subassemblies N5224A and N5225A Removing and Replacing the A1–A3 and Other Front Panel Subassemblies Tools Required • T-8 TORX driver (torque to 6 in-lb or 0.68 N.m) •...
Page 263 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5224A and N5225A Removing and Replacing the A1–A3 and Other Front Panel Subassemblies Removing the Touchscreen Controller Board ④ 1. Disconnect the touchscreen controller board cable (item ) from the touchscreen controller board and front panel interface board.
Page 264 Repair and Replacement Procedures PNA Series Microwave Network Analyzers Removing and Replacing the A1–A3 and Other Front Panel Subassemblies N5224A and N5225A Removing the A3 Display Assembly and the Touchscreen ① 1. Disconnect the following cables from the A1 front panel interface board: display cable (item ), inverter ➁...
Page 265 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5224A and N5225A Removing and Replacing the A1–A3 and Other Front Panel Subassemblies ⑥ ⑦ 4. The display cable (item ) can be removed by removing the three screws (item ) that attach it to the ⑧...
Page 266: Removing And Replacing The A4-A17 Boards
Repair and Replacement Procedures PNA Series Microwave Network Analyzers Removing and Replacing the A4–A17 Boards N5224A and N5225A Removing and Replacing the A4–A17 Boards Tools Required • T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) • T-20 TORX driver (torque to 21 in-lb or 2.38 N.m) •...
Page 267 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5224A and N5225A Removing and Replacing the A4–A17 Boards Figure 7-6 A4, A5, A7, A8, A10, A12, A13, , A15, A16, and A17 Boards Removal Service Guide N5225-90001 7-15...
Page 268: Removing And Replacing The A18 System Motherboard
Repair and Replacement Procedures PNA Series Microwave Network Analyzers Removing and Replacing the A18 System Motherboard N5224A and N5225A Removing and Replacing the A18 System Motherboard Tools Required • T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) •...
Page 269 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5224A and N5225A Removing and Replacing the A18 System Motherboard Figure 7-7. A18 System Motherboard Removal Service Guide N5225-90001 7-17...
Page 270: Removing And Replacing The A19 Midplane Board
Repair and Replacement Procedures PNA Series Microwave Network Analyzers Removing and Replacing the A19 Midplane Board N5224A and N5225A Removing and Replacing the A19 Midplane Board Tools Required • T-10 TORX driver (torque to 9 in-lb) • T-20 TORX driver (torque to 21 in-lb) •...
Page 271 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5224A and N5225A Removing and Replacing the A19 Midplane Board Figure 7-8 A19 Midplane Board Removal Service Guide N5225-90001 7-19...
Page 272: Removing And Replacing The A20 Power Supply Assembly
Repair and Replacement Procedures PNA Series Microwave Network Analyzers Removing and Replacing the A20 Power Supply Assembly N5224A and N5225A Removing and Replacing the A20 Power Supply Assembly Tools Required • T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) •...
Page 273 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5224A and N5225A Removing and Replacing the A20 Power Supply Assembly Figure 7-9 A20 Power Supply Assembly Removal Service Guide N5225-90001 7-21...
Page 274: Removing And Replacing The A21 Cpu Board Assembly
Repair and Replacement Procedures PNA Series Microwave Network Analyzers Removing and Replacing the A21 CPU Board Assembly N5224A and N5225A Removing and Replacing the A21 CPU Board Assembly Tools Required • T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) •...
Page 275 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5224A and N5225A Removing and Replacing the A21 CPU Board Assembly Figure 7-10 A21 CPU Board Assembly Removal Service Guide N5225-90001 7-23...
Page 276: Removing And Replacing The A22 Gpib Board
Repair and Replacement Procedures PNA Series Microwave Network Analyzers Removing and Replacing the A22 GPIB Board N5224A and N5225A Removing and Replacing the A22 GPIB Board Tools Required • T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) • T-20 TORX driver (torque to 21 in-lb or 2.38 N.m) •...
Page 277 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5224A and N5225A Removing and Replacing the A22 GPIB Board Figure 7-11 A22 GPIB Board Removal Service Guide N5225-90001 7-25...
Page 278: Removing And Replacing The A23 Test Set Motherboard
Repair and Replacement Procedures PNA Series Microwave Network Analyzers Removing and Replacing the A23 Test Set Motherboard N5224A and N5225A Removing and Replacing the A23 Test Set Motherboard Tools Required • T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) •...
Page 279 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5224A and N5225A Removing and Replacing the A23 Test Set Motherboard Figure 7-12 A23 Test Set Motherboard Removal Service Guide N5225-90001 7-27...
Page 280: Removing And Replacing The A24 If Multiplexer Board
Repair and Replacement Procedures PNA Series Microwave Network Analyzers Removing and Replacing the A24 IF Multiplexer Board N5224A and N5225A Removing and Replacing the A24 IF Multiplexer Board Tools Required • T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) •...
Page 281 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5224A and N5225A Removing and Replacing the A24 IF Multiplexer Board Figure 7-13 A24 IF Multiplexer Board Removal Service Guide N5225-90001 7-29...
Page 282: Removing And Replacing The A25 Hma26.5
Repair and Replacement Procedures PNA Series Microwave Network Analyzers Removing and Replacing the A25 HMA26.5 N5224A and N5225A Removing and Replacing the A25 HMA26.5 Tools Required • T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) • T-20 TORX driver (torque to 21 in-lb or 2.38 N.m) •...
Page 283 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5224A and N5225A Removing and Replacing the A25 HMA26.5 Figure 7-14 A25 HMA26.5 Removal Service Guide N5225-90001 7-31...
Page 284: Removing And Replacing The A26 Splitter
Repair and Replacement Procedures PNA Series Microwave Network Analyzers Removing and Replacing the A26 Splitter N5224A and N5225A Removing and Replacing the A26 Splitter Tools Required • T-8 TORX driver (torque to 6 in-lb) • T-20 TORX driver (torque to 21 in-lb) •...
Page 285 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5224A and N5225A Removing and Replacing the A26 Splitter Figure 7-15 A26 Splitter Removal Service Guide N5225-90001 7-33...
Page 286: Removing And Replacing The A27 And A28 Mixer Bricks
Repair and Replacement Procedures PNA Series Microwave Network Analyzers Removing and Replacing the A27 and A28 Mixer Bricks N5224A and N5225A Removing and Replacing the A27 and A28 Mixer Bricks Tools Required • T-8 TORX driver (torque to 6 in-lb) •...
Page 287 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5224A and N5225A Removing and Replacing the A27 and A28 Mixer Bricks Replacement Procedure 1. Reverse the order of the removal procedure. ⑥ If replacing the A28 mixer brick, remember to move the dust cap/termination (item ) from the old mixer brick to the new mixer brick in the same location.
Page 288: Removing And Replacing The A29-A32 Receiver Couplers And Receiver Coupler Mounting Brackets
Repair and Replacement Procedures PNA Series Microwave Network Analyzers Removing and Replacing the A29–A32 Receiver Couplers and Receiver Coupler Mounting Brackets N5224A and N5225A Removing and Replacing the A29–A32 Receiver Couplers and Receiver Coupler Mounting Brackets Tools Required • T-6 TORX driver (torque to 4 in-lb or 0.45 N.m) •...
Page 289 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5224A and N5225A Removing and Replacing the A29–A32 Receiver Couplers and Receiver Coupler Mounting Brackets Figure 7-17 A29 through A32 receiver couplers Removal Service Guide N5225-90001 7-37...
Page 290: Removing And Replacing The A33-A36 Test Port Couplers
Repair and Replacement Procedures PNA Series Microwave Network Analyzers Removing and Replacing the A33–A36 Test Port Couplers N5224A and N5225A Removing and Replacing the A33–A36 Test Port Couplers Tools Required • T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) •...
Page 291 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5224A and N5225A Removing and Replacing the A33–A36 Test Port Couplers Figure 7-18 A33 through A36 Test Port Couplers Removal Service Guide N5225-90001 7-39...
Page 292: Removing And Replacing The A37 Reference Mixer Switch
Repair and Replacement Procedures PNA Series Microwave Network Analyzers Removing and Replacing the A37 Reference Mixer Switch N5224A and N5225A Removing and Replacing the A37 Reference Mixer Switch Tools Required • T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) •...
Page 293 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5224A and N5225A Removing and Replacing the A37 Reference Mixer Switch Figure 7-19 A37 Reference Mixer Switch Removal Service Guide N5225-90001 7-41...
Page 294: Removing And Replacing The A38-A41 Source Attenuators And The A46-A49 Receiver Attenuators
Repair and Replacement Procedures PNA Series Microwave Network Analyzers Removing and Replacing the A38–A41 Source Attenuators and the A46–A49 Receiver Attenuators N5224A and N5225A Removing and Replacing the A38–A41 Source Attenuators and the A46–A49 Receiver Attenuators Tools Required • T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) •...
Page 295 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5224A and N5225A Removing and Replacing the A38–A41 Source Attenuators and the A46–A49 Receiver Attenuators Figure 7-20 Source and Receiver Attenuators Service Guide N5225-90001 7-43...
Page 296: Removing And Replacing The A42-A45 Bias Tees
Repair and Replacement Procedures PNA Series Microwave Network Analyzers Removing and Replacing the A42–A45 Bias Tees N5224A and N5225A Removing and Replacing the A42–A45 Bias Tees Tools Required • T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) • T-20 TORX driver (torque to 21 in-lb or 2.38 N.m) •...
Page 297 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5224A and N5225A Removing and Replacing the A42–A45 Bias Tees Figure 7-21 A42 through A45 Bias Tees Removal Service Guide N5225-90001 7-45...
Page 298: Removing And Replacing The A55 Solid State Drive (Ssd)
If installing an SSD for Windows XP: if the user has loaded unique calibration kit information, navigate to C:\Program Files\Keysight\Network Analyzer and copy USER_CALKITFILE to a USB flash memory drive. Also copy any personal user files that you wish to preserve.
Page 299 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5224A and N5225A Removing and Replacing the A55 Solid State Drive (SSD) Figure 7-22 SSD Removal Reinstalling the SSD Reverse the order of the removal procedure. Install Backup Files onto the New SSD The files that were previously saved onto a USB flash memory drive must now be installed onto the new SSD.
Page 300: Removing And Replacing The Rear Panel
Repair and Replacement Procedures PNA Series Microwave Network Analyzers Removing and Replacing the Rear Panel N5224A and N5225A Removing and Replacing the Rear Panel Tools Required • T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) • T-20 TORX driver (torque to 21 in-lb or 2.38 N.m) •...
Page 301 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5224A and N5225A Removing and Replacing the Rear Panel Figure 7-23 Rear Panel Removal Service Guide N5225-90001 7-49...
Page 302: Removing And Replacing The Front Panel Led Boards
Repair and Replacement Procedures PNA Series Microwave Network Analyzers Removing and Replacing the Front Panel LED Boards N5224A and N5225A Removing and Replacing the Front Panel LED Boards Tools Required • T-10 TORX driver (torque to 9 in-lb) • T-20 TORX driver (torque to 21 in-lb) •...
Page 303 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5224A and N5225A Removing and Replacing the Front Panel LED Boards Figure 7-24 Front Panel LED Boards Removal Service Guide N5225-90001 7-51...
Page 304: Removing And Replacing The Fans
Repair and Replacement Procedures PNA Series Microwave Network Analyzers Removing and Replacing the Fans N5224A and N5225A Removing and Replacing the Fans Tools Required • T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) • T-20 TORX driver (torque to 21 in-lb or 2.38 N.m) •...
Page 305 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5224A and N5225A 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.
Page 306: Removing And Replacing The Lithium Battery
Repair and Replacement Procedures PNA Series Microwave Network Analyzers Removing and Replacing the Lithium Battery N5224A and N5225A Removing and Replacing the Lithium Battery Tools Required • T-10 TORX driver (torque to 9 in-lb or 1.02 N.m) • T-20 TORX driver (torque to 21 in-lb or 2.38 N.m) •...
Page 307 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5224A and N5225A Removing and Replacing the Lithium Battery Figure 7-26 Lithium Battery Removal Service Guide N5225-90001 7-55...
Page 308: Post-Repair Procedures
Repair and Replacement Procedures PNA Series Microwave Network Analyzers Post-Repair Procedures N5224A and N5225A Post-Repair Procedures After the replacement of an assembly, you must perform the service procedures in the order listed in Table 7-2. Procedures referenced in this table are located in Chapter 3, “Tests and Adjustments,”...
Page 309 PNA Series Microwave Network Analyzers Repair and Replacement Procedures N5224A and N5225A Post-Repair Procedures Table 7-2 Related Service Procedures (Continued)  Adjustments Verification, Performance, Replaced Assembly and Other Procedures and Other Tests and Procedures EE Default Adjustment: Synth LO only...
Page 310 Repair and Replacement Procedures PNA Series Microwave Network Analyzers Post-Repair Procedures N5224A and N5225A Table 7-2 Related Service Procedures (Continued)  Adjustments Verification, Performance, Replaced Assembly and Other Procedures and Other Tests and Procedures IF Gain Adjustment Noise Floor Test...
Page 311 General Purpose Maintenance Procedures Service Guide N5225-90001...
Page 312 General Purpose Maintenance Procedures PNA Series Microwave Network Analyzers Information in This Chapter N5224A and N5225A 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 page 8-3 and troubleshooting tool.
Page 313: Error Terms
PNA Series Microwave Network Analyzers General Purpose Maintenance Procedures N5224A and N5225A Error Terms Error Terms Using Error Terms as a Diagnostic Tool By examining error terms, you can monitor system performance for preventive maintenance and troubleshooting purposes. The the most common causes of error term anomalies are: •...
Page 314: Using Flowgraphs To Identify Error Terms
General Purpose Maintenance Procedures PNA Series Microwave Network Analyzers Error Terms N5224A and N5225A as a tool: CAUTION Perform the following procedure only at a static-safe workstation, and wear a grounded wrist strap. This is important. If not properly protected against, electrostatic discharge can seriously damage your analyzer, resulting in costly repair.
Page 315 PNA Series Microwave Network Analyzers General Purpose Maintenance Procedures N5224A and N5225A Error Terms Figure 8-2 Flowgraph of Two-Port Error Terms where: E = error term 1st Subscript: D = Directivity S = Source Match R = Reflection Tracking X = Crosstalk (Isolation)
Page 316 General Purpose Maintenance Procedures PNA Series Microwave Network Analyzers Error Terms N5224A and N5225A Figure 8-3 Flowgraph of Three-Port Error Terms where: E = error term DIR = Directivity MAT = Forward Source Match and Reverse Load Match TRK = Forward Reflection Tracking and Reverse Transmission Tracking...
Page 317 PNA Series Microwave Network Analyzers General Purpose Maintenance Procedures N5224A and N5225A Error Terms Figure 8-4 Flowgraph of Four-Port Error Terms where: E = error term DIR = Directivity MAT = Forward Source Match and Reverse Load Match TRK = Forward Reflection Tracking and Reverse Transmission Tracking...
Page 318: Accessing Error Terms
General Purpose Maintenance Procedures PNA Series Microwave Network Analyzers Error Terms N5224A and N5225A Accessing Error Terms Error terms can be accessed either manually or programmatically: Manually • “Front Panel Access to Error Terms” on page 8-8 Programmatically • “GPIB Access to Error Terms” on page 8-9 •...
Page 319 PNA Series Microwave Network Analyzers General Purpose Maintenance Procedures N5224A and N5225A Error Terms Programmatic Access to Error Terms GPIB Access to Error Terms. You can access error terms by way of GPIB with Standard Commands for Programmable Instruments (SCPI).
Page 320: Error Term Data
General Purpose Maintenance Procedures PNA Series Microwave Network Analyzers Error Terms N5224A and N5225A Error Term Data The error term descriptions in this section include the following information: • a table of the error terms • description and significance of each error term •...
Page 321 PNA Series Microwave Network Analyzers General Purpose Maintenance Procedures N5224A and N5225A Error Terms Directivity (E and E and E are the uncorrected forward and reverse directivity error terms of the system. The directivity error of the test port is determined by measuring the S and S reflection of the calibration kit load.
Page 322 General Purpose Maintenance Procedures PNA Series Microwave Network Analyzers Error Terms N5224A and N5225A Isolation (Crosstalk) (E and E Isolation, or crosstalk, is the uncorrected forward and reverse isolation error terms that represent leakage between the test ports and the signal paths. The isolation error terms are characterized by measuring transmission (S ) with loads attached to both ports during the measurement calibration.isolation...
Page 323: Option Enable Utility
PNA Series Microwave Network Analyzers General Purpose Maintenance Procedures N5224A and N5225A Option Enable Utility Option Enable Utility Accessing the Option Enable Utility To start the option enable utility: Service Option Enable • Press UTILITY System then then • A dialog box similar to the one illustrated in Figure 8-6 is displayed.
Page 324: Enabling Or Removing Options
These options are enabled using the option enable utility and require a special license key. NOTE Some applications require a license key that is provided by Keysight. If you do not have the required license key, contact Keysight for assistance. Refer to “Contacting Keysight”...
Page 325: Repairing And Recovering Option Data
System , then , then Help About NA... b. Press UTILITY System , then , then 6. If the options are still not listed correctly, contact Keysight for assistance. Refer to “Contacting Keysight” on page 2-8. Service Guide N5225-90001 8-15...
Page 326: Installing Or Changing A Serial Number
2. VERY CAREFULLY, type the new serial number into the space provided and then click Change 3. If an error is made in entering the serial number, obtain a clear code from Keysight, enter the clear code in the space provided and click .
Page 327: Firmware Upgrades
If your network analyzer is connected to the Internet, there are two methods available for checking the availability of, and downloading, new firmware: • Download directly from: http://www.keysight.com/find/pna. (Select your analyzer’s model number in this web site to view available upgrades.) •...
Page 328: Operating System Recovery
Operating System Recovery Recovering from Solid State Drive Problems If you suspect that you have a solid state drive problem, go to the “Hard Drive Recovery” link on the Keysight PNA Series: Service & Support Home Page on the Internet.
Page 329: Correction Constants
PNA Series Microwave Network Analyzers General Purpose Maintenance Procedures N5224A and N5225A Correction Constants Correction Constants The analyzer stores many correction constants in non-volatile EEPROM memory. These constants enable the analyzer to produce accurate, leveled source signals and receive clean test signals.
Page 330 General Purpose Maintenance Procedures PNA Series Microwave Network Analyzers Correction Constants N5224A and N5225A 8-20 Service Guide N5225-90001...
Page 331 Index Numerics procedure 7-14 procedure 7-18 troubleshooting 4-33 A2 USB board 13.5 GHz LO synthesizer board part number 6-12 A12 doubler operation 5-11 illustrated 6-18 removal and replacement part number 6-16 part number 6-16 illustrated 7-11 removal and replacement removal and replacement procedure 7-10 illustrated...
Page 332 Index A26 splitter illustrated 6-23 6-29 6-35 6-41 procedure 7-42 illustrated 6-53 6-59 6-65 6-71 6-79 6-47 6-53 6-59 6-65 6-71 6-79 troubleshooting 4-37 part number 6-52 6-58 6-64 6-70 part number 6-22 6-28 6-34 6-46 A39 test port 3 source step attenuator 6-78 illustrated 6-71...
Page 333 Index troubleshooting 4-37 illustrated 7-15 synthesized source A46 test port 1 receiver step attenuator procedure 7-14 internal performance test software illustrated 6-41 6-47 6-71 6-79 accessories 3-28 operation 5-21 analyzer internal replaceable parts part number 6-46 6-70 6-78 in operator’s check 3-10 illustrated 6-95...
Page 334 Index sequence illustrated 6-39 replaceable parts attenuators part numbers 6-38 illustrated 6-71 required for servicing bottom assembly, Option 217 part numbers 6-70 replaceable parts replaceable RF cables illustrated 6-41 illustrated 6-73 6-75 part numbers 6-40 part numbers 6-72 6-74 B receiver replaceable RF cables replaceable ribbon cables &...
Page 335 Index source 3-42 failure of 3-18 block diagram 5-27 caution of test port cables 3-17 functional description of CE mark constants operation 5-26 certificate of calibration correction 8-19 digital processing group changing contacting Agilent block diagram 5-27 a serial number 8-16 controllers functional description of...
Page 336 Index flowgraph of one port upgrades 8-17 part number 6-10 flowgraph of two port flowgraph nameplate of one port error terms identifying using flowgraphs illustrated 6-11 of two port error terms isolation 8-12 part number 6-10 using to identify error terms load match 8-11 operation...
Page 337 Index Hardware 6-92 troubleshooting 4-12 lithium battery disposal IP address, LAN 4-19 See A55 ISM1-A mark removal and replacement high dynamic range isolation illustrated 7-55 measurement configuration 5-18 cause of failure 8-12 procedure 7-54 HMA26.5 definition of 8-12 LO synthesizer board See A25 measurements affected by 8-12...
Page 338 Index motherboard, test set motherboard 5-28 part numbers See A23 See section in Chapter 6 titled test port couplers 5-18 Replaceable Parts Listings test set motherboard 5-13 performance operator’s check 3-10 tests 3-28 accessories used in 3-10 calibration coefficients 3-37 N1966A pulse I/O adapter description of 3-10...
Page 339 Index linearity test 3-31 caution about maximum test 3-30 troubleshooting 4-26 4-35 warnings about pre-repair typical power output 4-36 replaceable cables procedures flexible caution about See cables, flexible troubleshooting 4-26 4-35 warnings about typical power output 4-36 preventive maintenance See cables, RF calibration 3-43 effect on error terms...
Page 340 Index caution about troubleshooting 4-13 specifications post-repair 7-56 specifications verification 3-19 instrument warnings about dialog box 3-23 stabilization, warm up time static safety parts example of results 3-26 3-27 system part numbers 6-99 failure flowchart 3-25 splitter required failure of 3-25 See A26 test equipment...
Page 341 Index test port 1 paint A48 test port 4 receiver step bias tee part numbers 6-99 attenuator 4-41 See A42 trace A49 test port 2 receiver step receiver coupler noise, test 3-33 attenuator 4-41 See A29 troubleshooting A5 26.5 GHz source 1 board 4-33 receiver step attenuator all traces...
Page 342 Index using controllers to system troubleshoot 4-18 warm up using error terms analyzer where to begin warning for servicing various warranty uncertainty service measurement 3-20 one-year return to Agilent upgrade standard analyzer Windows firmware 8-17 wire harnesses downloading from the internet 8-17 See cables, wire harnesses how to order...
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Page 344 This information is subject to change without notice. © Keysight Technologies 2011 - 2014 December 1, 2014 *N5225-90001* N5225-90001 www.keysight.com...

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8 General Purpose Maintenance Procedures

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Tests and Adjustments

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