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4-2 Keysight N5224A/25A Service Guide

Troubleshooting
Information in This Chapter

Chapter Four at-a-Glance

Conventions Used for Hardkeys, Softkeys, and Menu Items

The following conventions are used in this document:

Section Title

Summary of Content

Start Page

Getting Started with

Troubleshooting

A starting point for troubleshooting.

page 4-6

Power Up Troubleshooting

Power-up problems:

— Power supply problems
— LCD problems
— Bootup for the network analyzer interface

page 4-8

Front Panel Troubleshooting

Problems occurring after the network analyzer interface

is loaded:

— Does the display color appear correct?
— Do the front panel keys function properly?
— Does the front panel USB connector function

properly?

page 4-16

Rear Panel Troubleshooting

Problems associated with the rear panel interconnects.

The data found at these rear panel

interconnects can be used to troubleshoot the

CPU board.

page 4-21

Measurement System

Troubleshooting

Problems with the measurement portion of the analyzer.

— Checking the A, B, R1, and R2 signals.
— Checking the source group.
— Checking the signal separation group.
— Checking the receiver group.

page 4-28

Instrument Block Diagrams

Block diagrams for the analyzer including all options.

page 4-48

This represents a “hardkey”, a key that is physically located on the instrument.

This represents a “softkey”, a key whose label is determined by the instrument

firmware.

Menu Item

This represents an item in a drop-down or pop-up menu.

Hardkey

Softkey

Summary of Contents for N5224A

Page 1: ...Service Guide Keysight 2 Port and 4 Port PNA Microwave Network Analyzers This manual provides documentation for the following models N5224A 10 MHz to 43 5 GHz N5225A 10 MHz to 50 GHz ...

Page 2: ...o U S government customers under its standard commercial license which is embodied in its End User License Agreement EULA a copy of which can be found at http www keysight com find sweula The license set forth in the EULA represents the exclusive authority by which the U S government may use modify distribute or disclose the Software The EULA and the license set forth therein does not require or p...

Page 3: ...ce 2 2 Electrical Maintenance 2 2 Analyzer Options Accessories and Upgrades Available 2 3 Pulse I O Adapter N1966A 2 3 Required Service Test Equipment 2 4 Keysight Support Services and Assistance 2 7 Service and Support Options 2 7 Contacting Keysight 2 7 Shipping Your Analyzer to Keysight for Service or Repair 2 8 3 Tests and Adjustments Information in This Chapter 3 1 Conventions Used for Hardke...

Page 4: ...mum Power Output Test 3 32 Source Power Linearity Test 3 33 Frequency Accuracy Test 3 34 Trace Noise Test 3 34 Receiver Compression Test 3 35 Noise Floor Test 3 37 Calibration Coefficients Test 3 38 Dynamic Accuracy Test 3 39 Adjustments 3 41 10 MHz Frequency Reference Adjustment 3 41 Synthesizer Bandwidth Adjustment 3 42 Source Adjustment 3 42 IF Gain Adjustment 3 43 Receiver Characterization 3 4...

Page 5: ... D and R Traces Standard S Parameter Mode 4 29 Where to Begin Troubleshooting 4 31 Checking the Source Group 4 34 Checking the Signal Separation Group 4 39 Checking the Receiver Group 4 43 Instrument Block Diagrams Sheet 1 4 48 Microwave PNA N522xA 4 48 Instrument Block Diagrams Sheet 2 4 50 Microwave PNA N522xA 4 50 5 Theory of Operation Information in This Chapter 5 1 Chapter Five at a Glance 5 ...

Page 6: ... Replacement Sequence 6 3 Rebuilt Exchange Assemblies 6 4 Replaceable Parts Listings 6 6 Front Panel Assembly Front Side All Options 6 10 Front Panel Assembly Back Side All Options 6 12 Top Assemblies and Cables All Options 6 16 2 Port Configuration Option 200 6 22 2 Port Configuration Option 201 6 28 2 Port Configuration Option 210 6 34 2 Port Configuration Option 217 6 40 2 Port Configuration Op...

Page 7: ...ing the A23 Test Set Motherboard 7 28 Removing and Replacing the A24 IF Multiplexer Board 7 30 Removing and Replacing the A25 HMA26 5 7 32 Removing and Replacing the A26 Splitter 7 34 Removing and Replacing the A27 and A28 Mixer Bricks 7 36 Removing and Replacing the A29 A32 Receiver Couplers and Receiver Coupler Mounting Brackets 7 38 Removing and Replacing the A33 A36 Test Port Couplers 7 40 Rem...

Page 8: ...rms 8 6 Error Term Data 8 8 Option Enable Utility 8 11 Accessing the Option Enable Utility 8 11 Option Entitlement Certificate 8 11 Enabling or Removing Options 8 12 Repairing and Recovering Option Data 8 13 Installing or Changing a Serial Number 8 14 Firmware Upgrades 8 15 How to Check the Current Firmware Version 8 15 Downloading from the Internet 8 15 Operating System Recovery 8 16 Recovering f...

Page 9: ...t a Glance Section Title Summary of Content Start Page Safety Symbols Descriptions of CAUTION and WARNING symbols used throughout this manual page 1 2 General Safety Considerations A list of safety points to consider when servicing your network analyzer page 1 3 Electrostatic Discharge Protection A discussion of electrostatic discharge ESD and related recommendations and requirements for ESD prote...

Page 10: ...zard It calls attention to a procedure that if not correctly performed or adhered to could result in damage to or destruction of the instrument Do not proceed beyond a caution note until the indicated conditions are fully understood and met Warning denotes a hazard It calls attention to a procedure which if not correctly performed or adhered to could result in injury or loss of life Do not proceed...

Page 11: ...s not used as specified the protection provided by the equipment could be impaired This product must be used in a normal condition in which all means for protection are intact only If an instrument handle is damaged you should replace it immediately Damaged handles can break while you are moving or lifting the instrument and cause personal injury or damage to the instrument This instrument has aut...

Page 12: ...ery 100 watts dissipated in the cabinet If the total power dissipated in the cabinet is greater than 800 watts then forced convection must be used Do not operate the analyzer with the outer cover removed for more than 30 minutes as this could cause the analyzer to overheat which could result in costly damage The measuring terminals on this instrument are designed to be used with external signals d...

Page 13: ... analyzer with the outer cover removed for more than 30 minutes as this could cause the analyzer to overheat which could result in costly damage No operator serviceable parts inside Refer servicing to qualified personnel To prevent electrical shock do not remove covers The opening of covers or removal of parts may expose dangerous voltages Disconnect the instrument from all voltage sources while i...

Page 14: ...1 6 Keysight N5224A 25A Service Guide Safety and Regulatory Information General Safety Considerations 1 Figure 1 1 Location of Calibration Stickers on PNA ...

Page 15: ...lways wear a heel strap when working in an area with a conductive floor If you are uncertain about the conductivity of your floor wear a heel strap always ground yourself before you clean inspect or make a connection to a static sensitive device or test port You can for example grasp the grounded outer shell of the test port or cable connector briefly always ground the center conductor of a test c...

Page 16: ...1 8 Keysight N5224A 25A Service Guide Safety and Regulatory Information Electrostatic Discharge Protection 1 Figure 1 2 ESD Protection Setup ...

Page 17: ...quipment are required to be separated from normal waste for disposal Reference WEEE Directive 2002 96 EC This symbol indicates that the power line switch is ON This symbol indicates that the power line switch is in the STANDBY position This symbol indicates that the power line switch is in the OFF position This symbol is used to identify a terminal which is internally connected to the product fram...

Page 18: ...tery on the A21 CPU board assembly refer to Removing and Replacing the Lithium Battery on page 7 57 The RCM mark is a registered trademark of the Australian Communications and Media Authority Indicates the time period during which no hazardous or toxic substance elements are expected to leak or deteriorate during normal use Forty years is the expected useful life of the product This symbol on all ...

Page 19: ...grades Available A hyperlink to the PNA Configuration Guide which includes a list of options accessories and upgrades available for the microwave network analyzers page 2 3 Required Service Test Equipment A list of service equipment that is required to perform system verification performance tests adjustments and troubleshooting page 2 4 Keysight Support Services and Assistance The Internet addres...

Page 20: ...aintenance Electrical Maintenance Refer to Review the Principles of Connector Care on page 3 5 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 21: ...ly 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 and outputs of external pulse generators and external pulse modulators The adapter contains 11 SMB male coaxial connectors and a mating conne...

Page 22: ...equired for proper opera tion of this test software N A N7840A None P Frequency counter Freq 10 MHz to 20 GHz Accuracy 0 5 ppm 53151A Opt 001 None P A T Signal generator CW Freq 1 185 GHz N5181A Option 503 E8257D Option 520 P A T Power meter Accuracy 0 0068 dB N1913A 14A E4418A B E4419A Bd d If an accurate measurement of the dynamic accuracy specification is not required the E4418A or E4419A can b...

Page 23: ...Return Loss 28 dB 11903D None P A T Attenuators 2 4 mm m f 10 dB fixed attenuator Accuracy 0 5 dB Freq 10 MHz to 40 or 50 GHz 8490D Option 010 None P 2 4 mm m f 20 dB fixed attenuator Accuracy 0 5 dB Freq 10 MHz to 40 or 50 GHz 8490D Option 020 None P a Unless specified otherwise equipment listed is required for all analyzer models b P Performance tests A Adjustments T Troubleshooting R Repair V S...

Page 24: ...m open end torque wrench 0 9 N m 8 in lb setting for Port 1 and Port 2 measurement connections N A N A R Static Safety Parts Adjustable antistatic wrist strap N A 9300 1367 None P A T Antistatic wrist strap grounding cord 5 foot N A 9300 0980 None P A T Static control table mat and earth ground wire N A 9300 0797 None P A T Miscellaneous USB flash ROM drive N A Any None P A R a Unless specified ot...

Page 25: ...A Return to Keysight Calibration Plan The analyzer is delivered with a one year calibration certificate Options are available to have Keysight Technologies provide three or five year calibration coverage perform the annual calibration two or four times Options for basic calibration or ISO IEC 17025 or ANSI NCSL Z540 3 2006 standards compliant calibrations are available After calibration the analyz...

Page 26: ...ion as it was originally shipped Reinstall front and rear impact covers Ship the analyzer using the original or comparable antistatic packaging materials Contact Keysight for instructions on where to ship your analyzer In any correspondence or telephone conversation refer to the Keysight product by its model number and full serial number With this information the Keysight representative can determ...

Page 27: ...d for Hardkeys Softkeys and Menu Items The following conventions are used in this document Chapter Three at a Glance This represents a hardkey a key that is physically located on the instrument This represents a softkey a key whose label is determined by the instrument firmware Menu Item This represents an item in a drop down or pop up menu Section Title Summary of Content Start Page Before You Be...

Page 28: ...ion The Non Standards Compliant process of verifying your analyzer page 3 11 Preliminary Checks Performing the operator s check Checking your test cables Perform these checks before performing system verification page 3 12 System Verification What the system verification does How to perform the verification test How to interpret the results page 3 21 Performance Testsa A brief summary of each perf...

Page 29: ...andwidth Adjustment Source Adjustment IF Gain Adjustment Receiver Characterization Receiver Adjustment EE Default Adjustment IF Response Adjustment Option 090 093 or 094 Only page 3 41 a These performance tests are included in the analyzer s firmware for Options 897 and 898 b These adjustments are included in the analyzer s firmware on all models and options Section Title Summary of Content Start ...

Page 30: ...erature As the device dimensions change with temperature their electrical characteristics change as well It is necessary to keep the environmental levels within the following limits Temperature 23 C 3 C Error corrected temperature range Once the measurement calibration has been done the ambient temperature must be maintained to within 1 C of the calibration temperature Humidity 0 to 95 at 40 C max...

Page 31: ...utes Table 3 1 Connector Care Quick Reference Guide Handling and Storage Do Keep connectors clean Do Not Touch mating plane surfaces Extend sleeve or connector nut Set connectors contact end down Use plastic end caps during storage Store connectors or adapters loose Visual Inspection Do Inspect all connectors carefully Do Not Use a damaged connector ever Look for metal particles scratches and dent...

Page 32: ... wrench for final connection Tighten past torque wrench break point a Cleaning connectors with alcohol shall only be done with the instrument s power cord removed and in a well ventilated area Allow all residual alcohol moisture to evaporate and the fumes to dissipate prior to energizing the instrument Table 3 1 Connector Care Quick Reference Guide ...

Page 33: ...lyzer s conformance to instrument specifications System Specifications System specifications specify warranted performance of the measurement system when making error corrected measurements using the same calibration kit and test cables used during the system verification routine System specifications are applicable only when the measurement system is used to make error corrected measurements The ...

Page 34: ...he verification kit has a traceable path to NIST The total measurement uncertainty limits for the performance verification are the sum of the factory measurement uncertainties and the uncertainties associated with measuring the same devices on the system being verified The difference between the factory measured data and the verification measured data must fall within the total uncertainty limits ...

Page 35: ...pecifications If the performance tests are used to confirm instrument specifications the certificate of calibration will apply to the PNA as an independent instrument The equipment and measurement standards used for the tests must be certified and must be traceable to recognized standards If you have a measurement application that does not use all of the measurement capabilities of the analyzer yo...

Page 36: ...ping to repair or adjust1 Refer to Figure 3 1 for test flow Print data at the completion of all the tests even if you are aware that the analyzer did not pass If there is a failure complete the verification before you troubleshoot repair and adjust After the failure has been corrected repeat the entire set of performance tests and generate a new set of data Figure 3 1 ANSI NCSL Z540 3 2006 and ISO...

Page 37: ... verification perform the preliminary checks and the performance tests while stopping to troubleshoot Refer to Figure 3 2 for test flow Troubleshoot and repair the first problem encountered without continuing to other tests After you troubleshoot repair and adjust repeat the last failed portion and generate a new set of data Figure 3 2 Non Standards Compliant Verification Flowchart ...

Page 38: ... attenuators calibration of the receivers frequency response of the receivers phase lock and leveling basic functional test of noise floor and trace noise Accessories Used in the Operator s Check Performing the Operator s Check 1 Press UTILITY then then 2 In the PNA Operator s Check dialog box refer to Figure 3 3 under Configure select either Prompt for attachment of Short Open to pause at each st...

Page 39: ...hem as they are needed 5 The result of the operator s check will be shown as a PASS or FAIL next to each test refer to Figure 3 3 The PNA Operator s Check dialog box will look different for different PNA model numbers and installed options Some of the tests are performed only if the appropriate options are installed in the PNA Figure 3 3 Operator s Check Dialog Box ...

Page 40: ...3 19 Accessories Used in the Test Port Cable Checks Cable Return Loss Check 3 Press UTILITY 4 Perform a one port calibration on Port 1 1 Port Reflection Refer to the embedded help in the analyzer if necessary 5 Connect the test port cable to Port 1 Connect a broadband load to the other end of the cable Tighten to the specified torque for the connector type The analyzer now displays the return loss...

Page 41: ...ULUS and set the power level to 17 dBm 5 Perform a 1 port calibration on the PNA Port 1 using SmartCal Guided Calibration Follow the calibration wizard instructions After calibration the PNA prompts you to save the cal set as a user Calset Save the cal set data as CalSet_1 cst 6 Connect the test port cable to the PNA Port 1 and perform a 1 port calibration again at the end of the cable After calib...

Page 42: ...lower left corner of the dialog box Save the cable S2P file 9 Retrieve the saved cable S2P to plot out the insertion loss trace S2P data also can be viewed directly on the PNA by pressing UTILITY Refer to the analyzer s embedded Help section Save and Recall a File if necessary 10 Refer to the cable manual to see if it meets the insertion loss specification For an example of a typical insertion los...

Page 43: ...k 1 With the test port cable still connected to Port 1 connect a short to the other end of the cable 2 Press UTILITY 3 Press TRACE CHANNEL then In the New Trace dialog box click the S11 box and then click OK 4 Press RESPONSE then then ENTRY 5 Press RESPONSE Verify that is ON If not press the softkey to toggle it ON The Averaging Factor box will appear directly above the display In the Averaging Fa...

Page 44: ...display Set the Scale Per Division for optimum viewing as shown in Figure 3 7 12 Place a marker on the largest deflection that goes above the reference line and is within the cable s specified frequency range For a typical response of cable magnitude and phase stability see Figure 3 7 13 Place a marker on the largest deflection that goes below the reference line and is within the cable s specified...

Page 45: ...zer to average the measurement 100 times approximately five seconds 5 To normalize the data trace press MARKER ANALYSIS then then then then ENTRY 6 To adjust the display scale a Press RESPONSE then The Scale Per Division box will appear directly above the display Set the Scale Per Division for 0 5 dB Press ENTRY b Press The Reference Level box will appear directly above the display Set the Referen...

Page 46: ...ime to compare several connections If any mode appears each time the cable is connected and reconnected measurement integrity will be affected For a typical response of cable connector repeatability see Figure 3 8 12 For the Port 2 3 and 4 Check connect the cable with the load attached to the respective port and repeat steps 2 through 11 Figure 3 8 Typical Cable Connector Repeatability Response If...

Page 47: ... What the System Verification Verifies The system verification procedure verifies proper operation of the network analyzer calibration kit test port cables together as a system It DOES NOT verify that any of these components pass their specifications independently The user is responsible for independently calibrating and verifying the proper operation of the calibration kit and test port cables pr...

Page 48: ...wn phase is assumed to be worst case 180 to 180 Random errors such as noise and connector repeatability are generally combined in a root sum of the squares RSS manner Measurement Traceability To establish a measurement traceability path to a national standard for a network analyzer system the overall system performance is verified through the measurement of devices that have a traceable path This ...

Page 49: ...he verification is connect cables to the analyzer test ports perform a calibration or recall a recent calibration run the system verification program for the verification devices Each time through the verification process you are prompted to make necessary connections and perform or recall a calibration as part of performing the verification If you select to perform a calibration you are guided th...

Page 50: ...ts in the cable tests earlier in this chapter that show the performance of good cables It is highly recommended that the test port cables be regularly tested For system verification to perform correctly it is NECESSARY that the verification devices be measured with their female connectors connected to port 1 or 3 and their male connectors connected to port 2 or 4 Although the performance for all S...

Page 51: ...re that the correct driver is loaded and the printer is defined as the default printer Refer to the embedded help in the analyzer for printer setup Let the analyzer warm up for at least 90 minutes 2 Insert the verification kit disk into the analyzer disk drive 3 Press UTILITY then then The System Verification dialog box is displayed refer to Figure 3 10 Figure 3 10 System Verification Dialog Box 4...

Page 52: ...ber of ports to be verified or to change the number of devices to measure click on the Configure tab and make the desired selections 6 Click Run 7 Follow the instructions on the analyzer for performing a full calibration or recalling an existing recent calibration 8 Follow the instructions on the analyzer for performing the system verification inserting the verification devices as prompted If the ...

Page 53: ...age 8 6 5 Refer to Figure 3 11 for additional troubleshooting steps Figure 3 11 System Verification Failure Flowchart Interpreting the Verification Results Figure 3 12 shows an example of typical verification results with Print Tabular Data selected in the Printer Output area of the System Verification dialog box At the top of the printed output is the name of the device the serial number of the d...

Page 54: ...sts and Adjustments System Verification 3 Each S parameter measurement result is printed with frequency tested lower and upper limit lines the measured data and the result of the test Figure 3 12 Example of Printed Tabular Verification Results ...

Page 55: ...em Verification dialog box The printed graphical results show the following the name of the device measured the serial number of the device the parameters measured Results of the measurements Labeled as A in Figure 3 13 Data measured at the factory from the verification kit Labeled as B in Figure 3 13 Upper and lower limit points as defined by the total system uncertainty system Labeled as C in Fi...

Page 56: ...3 30 Keysight N5224A 25A Service Guide Tests and Adjustments System Verification 3 Figure 3 13 Example of Printed Graphical Verification Results ...

Page 57: ...tput Test Source Power Linearity Test Frequency Accuracy Test Trace Noise Test Receiver Compression Test Noise Floor Test Calibration Coefficients Test Dynamic Accuracy Test 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 Use...

Page 58: ...l frequency range Specification Tested Test Port Output Maximum Leveled Power Equipment Used Power meter Power sensors Any necessary adapters Description of the Test 1 The analyzer is Preset 2 The analyzer is set up for a CW reflection measurement on the test port to be measured 3 A power sensor is connected to the test port using any necessary adapters 4 The analyzer frequency is set to the desir...

Page 59: ... transmission measurement on the test port pair to be measured 3 A test cable is connected between the port pair to be tested with 20 dB of attenuation in series with the cable This is done with an internal source step attenuator or an external 20 dB attenuator This attenuation ensures that the receiver remains in its linear range 4 The receiver measurement is normalized at this Preset power level...

Page 60: ...accuracy of the synthesizer board needs to be tested 1 The analyzer is Preset 2 The analyzer is set up for a CW measurement on Port 1 3 A test cable is connected between Port 1 and a frequency counter with any necessary adapters 4 The signal frequency is measured and compared with the analyzer source frequency setting The difference must be less than the source frequency divided by 16 for a 1 part...

Page 61: ... the standard deviation of both the magnitude trace and the phase trace 5 These standard deviation values are reported as the analyzer s trace noise and are compared with the Trace Noise magnitude and phase specifications If the Analyzer Fails this Test A failure of this test indicates a fault in the receiver s IF chain between the mixer and the A12 SPAM board This can indicate a faulty assembly o...

Page 62: ...the test set output port 4 A power sensor is connected to the end of the test cable 5 For a series of CW frequencies across the analyzer s full frequency range the source output level is adjusted to achieve the specified receiver compression power level typically the receiver s maximum input power level 6 The power sensor is disconnected from the test cable and the cable is connected to the port t...

Page 63: ...floor of Ports 2 3 and 4 1 The analyzer is Preset 2 The analyzer is set up for a CW transmission measurement between the source port and the test port to be measured The analyzer is set to an IF bandwidth of 1 kHz and 801 points per sweep 3 A test cable is connected to the source port 4 A power sensor is connected to the end of the test cable with any necessary adapters 5 For hundreds of frequenci...

Page 64: ...t cable Specification Tested Uncorrected System Performance Equipment Used Calibration kit Test cable Description of the Test Two full SOLT 2 port calibrations are performed on each port pair Ports 1 and 2 are tested as a pair Ports 3 and 4 are tested as a pair on 4 port analyzers Isolation is turned off during each calibration 1 A test cable is connected to Port 1 2 A calibration is performed bet...

Page 65: ...ort A test cable is connected between the signal generator and the test set s Source 2 In port A test cable is connected to the test set s Receiver Out port and the power sensor is connected to the end of this cable The test set s output attenuator is set to 20 dB With the signal generator RF turned off the PNA source power is adjusted until the power sensor reads 20 dBm The PNA source is then tur...

Page 66: ...ch receiver If the Analyzer Fails this Test If the analyzer fails this test rerun the test If the analyzer fails this test repeatedly 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 Refer to Removing and Replacing the A27 and A28 Mixer Bricks on page 7 36 If the analyzer still fails this test replace the A12 SPA...

Page 67: ...nt Option 090 093 or 094 Only on page 3 46 These adjustments are described on the following pages 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 Equipment Used for the 10 MHz Frequency Reference Adjustment Procedure 1 Connect the equipme...

Page 68: ...TY then then then click Synthesizer Bandwidth Adj 2 Follow the instructions and prompts as they are displayed 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 Equipment Used for the Source Adjustment System Service Ad...

Page 69: ...ettings are correct 4 Follow the instructions and prompts as they are displayed IF Gain Adjustment The IF gain adjustment is used to adjust the IF gain of the network analyzer Procedure 1 Press UTILITY then then then click IF Gain Adjustment 2 Follow the instructions and prompts as they are displayed Receiver Characterization This characterizes the receivers in your analyzer Procedure 1 Press UTIL...

Page 70: ...ver at Port 1 Data obtained during this adjustment are stored in the mxcalfile_pxx files in flash memory on the test set motherboard with a backup copy stored on the hard disk drive The data are used in subsequent measurements Solid state drives can be swapped or replaced without concern for the mxcalfile_pxx files If the test set motherboard is replaced the PNA firmware will automatically create ...

Page 71: ...Equipment Setup 1 for the Receiver Adjustment 2 Press UTILITY then then then click Receiver Adjustment 3 Ensure the GPIB settings are correct 4 Follow the instructions and prompts as they are displayed Figure 3 17 Equipment Setup 2 for the Receiver Adjustment System Service Adjustments ...

Page 72: ...fy because an adjustment is typically unnecessary 3 Follow the instructions and prompts as they are displayed IF Response Adjustment Option 090 093 or 094 Only The IF Response adjustment is required when upgrading to Option 090 093 and or 094 In addition this adjustment must be performed each time a new configuration is set up or if cables are changed Procedure 1 Press UTILITY then then then click...

Page 73: ...tion 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 The sections in this chapter are arranged in a logical troubleshooting order The following table lists the sections and a brief summary of what to look for in that section ...

Page 74: ...keys function properly Does the front panel USB connector function properly page 4 16 Rear Panel Troubleshooting Problems associated with the rear panel interconnects The data found at these rear panel interconnects can be used to troubleshoot the CPU board page 4 21 Measurement System Troubleshooting Problems with the measurement portion of the analyzer Checking the A B R1 and R2 signals Checking...

Page 75: ...ing Operating the Analyzer With Covers Removed Operating the Analyzer With Covers Removed Do not operate the analyzer with the outer cover removed for more than 30 minutes as this could cause the analyzer to overheat which could result in costly damage ...

Page 76: ...ischarge ESD This is important If not properly protected against electrostatic discharge can seriously damage your analyzer resulting in costly repair To reduce the chance of electrostatic discharge follow all of the recommendations outlined in Electrostatic Discharge Protection on page 1 7 for all of the procedures in this chapter ...

Page 77: ... these steps Step 1 Order a replacement assembly Refer to Chapter 6 Replaceable Parts Step 2 Replace the faulty assembly and determine what adjustments are necessary Refer to Chapter 7 Repair and Replacement Procedures Step 3 Perform the necessary adjustments Refer to Chapter 3 Tests and Adjustments Step 4 Perform the necessary performance tests Refer to Chapter 3 Tests and Adjustments ...

Page 78: ...4 8 3 Is the Windows operating system running If not refer to Operating System Recovery on page 8 16 for instructions 4 If other equipment cables and connectors are being used with the instrument make sure they are clean connected properly and operating correctly 5 Review the procedure for the measurement being performed when the problem appeared Are all the settings correct If not correct them 6 ...

Page 79: ...roubleshooting Getting Started with Troubleshooting Figure 4 1 Troubleshooting Organization Flowchart Go to Power Up Troubleshooting Go to Front Panel Troubleshooting Go to Rear Panel Troubleshooting Go to Measurement System Troubleshooting ...

Page 80: ...ing system should start The network analyzer measurement interface should open with an S11 measurement displayed Step 3 If the analyzer powers up correctly continue troubleshooting with Front Panel Troubleshooting on page 4 16 Step 4 If the analyzer does not power up correctly follow these troubleshooting steps If the line switch does not glow go to Power Supply Check on page 4 9 If you cannot hea...

Page 81: ...ing it is likely that the problem is a defective A20 power supply the A19 midplane board or another assembly that is loading down the A20 power supply Continue with If Any Supply Voltage Is Missing on page 4 11 to determine the cause of the problem 5 If the line switch is lit correctly and all the power supply voltages appear to be present as indicated by the LEDs as shown in Figure 4 2 the power ...

Page 82: ...he safety symbols provided on the instrument and in General Safety Considerations on page 1 3 before operating the unit with the cover removed Make sure that the safety instructions are strictly followed Failure to do so can result in personal injury or loss of life Do not operate the analyzer with the outer cover removed for more than 30 minutes as this could cause the analyzer to overheat which ...

Page 83: ...ltage or over current condition can be the A20 power supply itself or any assembly to which the A20 power supply provides voltage To isolate the cause continue to the assembly removal process as described in the section titled If Any Supply Voltage Is Missing on page 4 11 Table 4 1 Power Supply Measurement Points Test Point Supply Name Expected Level Vdc Test Point Supply Name Expected Level Vdc T...

Page 84: ...synthesizer board refer to Removing and Replacing the A4 A17 Boards on page 7 14 8 Remove the A17 13 5 GHz synthesizer board refer to Removing and Replacing the A4 A17 Boards on page 7 14 9 Remove the A4 13 5 GHz synthesizer board if present refer to Removing and Replacing the A4 A17 Boards on page 7 14 10 Remove the A14 frequency reference board refer to Removing and Replacing the A4 A17 Boards o...

Page 85: ... supplies If the supplies are within specifications the most probable cause is a defective A18 system motherboard Refer to Removing and Replacing the A18 System Motherboard on page 7 17 If only one or two fans are not functioning and the power supplies are within specifications suspect the A18 system motherboard or defective fan s Perform the following procedure 1 Remove the fan bracket with fans ...

Page 86: ... suspect a defective A18 system motherboard Refer to Removing and Replacing the A18 System Motherboard on page 7 17 Troubleshooting LCD Display Problems This procedure is intended to isolate the faulty assembly when the display is dark If the display is lit but the color mix is faulty refer to A3 Display Test on page 4 19 1 If the display is dim the A3 display assembly is defective Refer to Removi...

Page 87: ...obable cause is the A21 CPU board Refer to Removing and Replacing the A21 CPU Board Assembly on page 7 24 3 If the external VGA monitor displays the correct information verify that the front panel interface ribbon cable is properly plugged into the motherboard connector Refer to Removing and Replacing the Front Panel Assembly on page 7 8 4 If the front panel interface ribbon cable is properly conn...

Page 88: ... Up Troubleshooting on page 4 8 Refer to the following sections to verify the operation of the noted assemblies Front Panel Keypad and RPG Test on this page A3 Display Test on page 4 19 Checking the A2 USB Board on page 4 19 A1 Front Panel Interface Board on page 4 20 If all assemblies are working correctly continue troubleshooting with Rear Panel Troubleshooting on page 4 21 Front Panel Keypad an...

Page 89: ...d is working If some of the keys are not working suspect a faulty keypad To replace the keypad refer to Removing and Replacing the A1 A3 and Other Front Panel Subassemblies on page 7 10 If none of the keys are working correctly suspect a faulty A1 front panel interface board To replace the A1 front panel interface board refer to Removing and Replacing the A1 A3 and Other Front Panel Subassemblies ...

Page 90: ...pect a faulty A1 front panel interface board To replace the A1 front panel interface board refer to Removing and Replacing the A1 A3 and Other Front Panel Subassemblies on page 7 10 Trace 4 Display Bk Sp Traces Avg 0 STIMULUS Keys Receiver Cal 1 Freq Navigation Keys MARKER ANALYSIS Keys 2 Power Marker 3 Sweep Search 4 Trigger Memory 5 UTILITY Keys Analysis 6 Save Click 7 Print 8 Macro 9 Recall G n...

Page 91: ...ollow the instructions on the screen How to Identify a Faulty Display A display is considered faulty if More than 0 002 of the total pixels have a constant blue green red or black appearance that will not change Three or more consecutive pixels have a constant blue green red or black appearance that will not change If the A3 display assembly is determined to be faulty replace it Refer to Removing ...

Page 92: ... display signals from the A21 CPU board to the A3 display assembly Checking the Speaker If no audio is heard Verify that the volume is set correctly and the proper sound driver is loaded do the following Press UTILITY then then Click on the Sounds and Audio Devices entry Follow the normal Windows procedure to check the sound drivers and volume If the audio is still not heard suspect a faulty speak...

Page 93: ...he device does not perform correctly remove the non working USB device wait 15 seconds and then reconnect the device to the rear panel USB port If the USB device still does not work and has been verified to work elsewhere then the A21 CPU board is faulty Refer to Removing and Replacing the A21 CPU Board Assembly on page 7 24 Checking the CONTROLLER Port The network analyzer uses a National Instrum...

Page 94: ...of the instruments on the bus Troubleshooting Systems with Controllers Passing the preceding test indicates that the analyzer s peripheral functions are operating normally Therefore if the analyzer has not been operating properly with an external controller check the following The GPIB interface hardware is incorrectly installed or not operational Refer to the embedded help in your analyzer The pr...

Page 95: ... network to the analyzer How to Ping from the Analyzer to the Local Area Network LAN Follow the steps below to verify proper LAN operation assuming you have a functioning LAN If no network LAN is available see Testing Between Two Analyzers on page 4 25 1 Make sure the IP address on the analyzer is set properly and that it is unique If unsure how to check the IP address refer to the embedded help i...

Page 96: ... Reply from 141 121 69 162 bytes 32 time 10ms TTL 127 Reply from 141 121 69 162 bytes 32 time 10ms TTL 127 Ping statistics for 141 121 69 162 Packets Sent 4 Received 4 lost 0 0 loss Approximate round trip times in milli seconds Minimum 0ms Maximum 0ms Average 0ms 6 The above message verifies that one way communication from the analyzer to the network has been established 7 If the subnet mask was c...

Page 97: ...e a short length of cable with an RJ 45 connector on each end Some network hubs have the capability to make a crossover connection using two normal or straight through cables If this capability is not available and a crossover cable is not available a crossover cable can be made by following the directions in Constructing a Crossover Cable on page 4 26 Set the IP addresses on two analyzers The add...

Page 98: ...rom pin 1 on the other end of the cable c Connect the wire from pin 2 on one end of the cable to the wire from pin 6 on the other end of the cable d Connect the wire from pin 6 on one end of the cable to the wire from pin 2 on the other end of the cable 3 Insulate all exposed wires so that they cannot short together 4 Label this as a crossover cable so that it cannot be confused with a standard ca...

Page 99: ...Keysight N5224A 25A Service Guide 4 27 Troubleshooting Rear Panel Troubleshooting Figure 4 5 Construction of a Crossover Cable ...

Page 100: ...erate and displays no error messages For this type of failure performance tests must be conducted to isolate the problem Begin with viewing the error terms as described in Error Terms on page 8 2 This will help to isolate most problems If additional tests are required refer to Performance Tests on page 3 31 Hard Failure With a hard failure the PNA does not perform well and displays one or more err...

Page 101: ... keysight com pna EEPROM_Information html To view this EEPROM header information on the network analyzer display press UTILITY then 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 7 Figure 4 6 EEPROM Header Info Dialog Window Error Messages SOURCE UNLEVELED The source ALC circuit on the A23 ...

Page 102: ...played in four separate data windows as shown in Figure 4 7 Identifying discrepancies of the traces in these windows can help you to isolate the faulty assembly Figure 4 7 Typical 4 Receiver Display for 2 Port Models For 4 port analyzer models traces A B C D and R1 R2 R3 and R4 are displayed in eight separate data windows as shown in Figure 4 8 Identifying discrepancies of the traces in these wind...

Page 103: ...analyzer To test further 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 7 If any of the traces are not present are noisy or distorted or are at an incorrect level then there is a problem with the analyzer s measurement system Proceed to Where to Begin Troubleshooting Where to Begin Tr...

Page 104: ...nalyzer functional group to begin troubleshooting This is by no means an exhaustive list of possible symptoms nor possible failures It is recommended that you view the system block diagram at the end of this chapter as you review the entries in this list and perform any of the troubleshooting procedures listed Good judgment and established logical troubleshooting techniques must be used to complem...

Page 105: ... 3 If you have verified that the DSP driver is present and enabled but all traces are still missing in all bands go to Checking the Source Group on page 4 34 If the traces exhibit power drops in some frequency bands the problem is in the source group Go to Source Group Tests on page 4 34 and perform the tests that correspond to the problems seen Single Trace A B C D R1 R2 R3 or R4 Only If the trac...

Page 106: ...oss the frequency range Broadband failures are indicated by all receiver traces being in the noise floor RF Signal Troubleshooting Check the output power of the A B C and D signals Too many sections Equipment Used for This Check Use an antistatic work surface and wrist strap to reduce the chance of electrostatic discharge for all of the procedures in this chapter Procedures described in this docum...

Page 107: ...ecking the A14 50 MHz Reference Outputs If the power level is low or high on only one of the test ports the problem is either source group or in the signal separation group Continue with Checking the A14 50 MHz Reference Outputs to check the source group Checking the A14 50 MHz Reference Outputs 1 Refer to the block diagram at the end of this chapter and to Top Assemblies and Cables All Options on...

Page 108: ...ference signal from Checking the A14 50 MHz Reference Outputs is present replace the A15 LO synthesizer board Refer to Removing and Replacing the A4 A17 Boards on page 7 14 7 If the signal is present reconnect cable W41 and then continue with Checking the A25 HMA26 5 Output Checking the A25 HMA26 5 Output 1 Refer to the block diagram at the end of this chapter and to Bottom Assemblies Standard 4 P...

Page 109: ...Hz signal should be present 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 For analyzers with DSP version 4 0 the signal is 7 61 MHz above the network analyzer setting For analyzers with DSP version 5 0 the signal is 7 44 MHz ab...

Page 110: ...at the A10 source 2 board W7 W8 and A10 are only available in 4 port models and 2 port models with Option 224 2 Disconnect cables W3 and W4 or cables W7 and W8 dependent on which source board is to be checked at the A7 A8 A12 or A13 50 GHz Doubler board 3 Connect the spectrum analyzer to the open connector at the end of the cable that connects to the source board to be checked 4 Set the network an...

Page 111: ...ther than broadband related set the analyzer frequency to the center of the problem band The spectrum analyzer should measure a signal above the network analyzer setting For analyzers with DSP version 4 0 the signal is 7 61 MHz above the network analyzer setting For analyzers with DSP version 5 0 the signal is 7 44 MHz above the network analyzer setting 6 If the signal is not present but the signa...

Page 112: ...meter user s guide for instructions on setting the calibration factor 2 If the Receiver Display Figure 4 7 or Figure 4 8 is not on the analyzer screen perform the following Press UTILITY then then then 3 Set the sweep speed for a 10 second sweep Press STIMULUS then Set the time to 10 000 seconds in the Sweep Time box Procedures described in this document are performed with power supplied to the pr...

Page 113: ... 4 43 If the measured power is not correct go to Checking the Signal through the Signal Separation Path on page 4 41 Checking the Signal through the Signal Separation Path For all of the following checks refer to the block diagrams at the end of this chapter and to any of the following that are appropriate 2 Port Configuration Option 200 on page 6 22 Bottom RF Cables Standard 2 Port Configuration ...

Page 114: ... 219 and 419 Port 1 W81 of A29 Port 2 W93 of A32 Port 3 W85 of A30 Port 4 W89 of A31 2 Using a 5 16 inch torque wrench disconnect the semirigid cable at the receiver coupler 3 Connect the spectrum analyzer to the open receiver coupler connector Set the spectrum analyzer to measure a signal at 800 MHz 4 If the 800 MHz signal is not present and the analyzer does not have mechanical switches replace ...

Page 115: ... the source step attenuator Refer to Removing and Replacing the A38 A41 Source Attenuators and the A46 A49 Receiver Attenuators on page 7 45 5 If the 800 MHz signal is present replace the associated bias tee Refer to Removing and Replacing the A38 A41 Source Attenuators and the A46 A49 Receiver Attenuators on page 7 45 Checking the Receiver Group Equipment Used for These Tests For all of the follo...

Page 116: ...nalyzer and turn on the power Checking the A27 and A28 Mixer Brick Receiver Outputs Set the network analyzer for an S11 measurement with a CW frequency of 1 GHz 1 Locate the following flexible cables at the receiver IF outputs of the mixer brick s 2 port models Receiver A W61 of A27 Receiver R1 W62 of A27 Receiver R2 W63 of A27 Receiver B W64 of A27 4 port models Receiver A W61 of A27 Use an antis...

Page 117: ...eiver noted above and the analyzer does not have receiver attenuators replace the A27 or A28 mixer brick whichever is appropriate Refer to Removing and Replacing the A27 and A28 Mixer Bricks on page 7 36 If the measured signal is missing on the A B C or D receivers and the analyzer has receiver attenuators continue testing at Checking the A46 A47 A48 and A49 35 dB Receiver Step Attenuators on page...

Page 118: ...o Removing and Replacing the A27 and A28 Mixer Bricks on page 7 36 Checking the A24 IF Multiplexer Board 1 Locate each of the flexible RF cables at the output receivers of the IF multiplexer board 2 port models Receiver A W69 Receiver R1 W72 Receiver R2 W73 Receiver B W70 4 port models Receiver A W69 Receiver B W70 Receiver C W72 Receiver D W73 Receiver R W71 2 Disconnect the appropriate flexible ...

Page 119: ... Service Guide 4 47 Troubleshooting Measurement System Troubleshooting 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 30 ...

Page 120: ...4 48 Keysight N5224A 25A Service Guide Troubleshooting Instrument Block Diagrams Sheet 1 4 Instrument Block Diagrams Sheet 1 Microwave PNA N522xA ...

Page 121: ... 250 MHz B2 4 B2 4 B5 B6 10 B6 B5 B7 B8 B9 10 B2 4 B2 4 P3 P1 P4 P5 P6 26 X2 P5 25 ALC Modulator P6 P3 P4 P1 29 8 9 10 15 14 ƒ 22 23 16 17 9 8 DDS Direct Digital Synthesizer DDS Direct Digital Synthesizer 0 25 0 5 GHz W11 W12 W17 W18 W59 3 2 19 GHz 3 2 19 GHz W36 RCVR A IN CPLR ARM Port 1 W37 0 50 dB A46 STEP ATTEN W97 W98 TO A27 A W22 TO A27 A W22 W115 W36 RCVR B IN CPLR ARM W40 0 50 dB A49 STEP ...

Page 122: ...4 50 Keysight N5224A 25A Service Guide Troubleshooting Instrument Block Diagrams Sheet 2 4 Instrument Block Diagrams Sheet 2 Microwave PNA N522xA ...

Page 123: ...to 0 05383 0 010 to 0 053 0 010 to 0 053 0 010 to 0 053 3 1 0 06044 to 0 18244 0 06044 to 0 18244 0 053 to 0 175 0 053 to 0 175 0 053 to 0 175 4 1 0 18244 to 0 25744 0 18244 to 0 25744 0 175 to 0 250 0 175 to 0 250 0 175 to 0 250 5 1 0 25744 to 0 50744 0 25744 to 0 50744 0 250 to 0 500 0 250 to 0 500 0 250 to 0 500 6 1 0 50744 to 1 0074 0 50744 to 1 0074 0 500 to 1 000 0 500 to 1 000 0 500 to 1 00...

Page 124: ...4 52 Keysight N5224A 25A Service Guide Troubleshooting Instrument Block Diagrams Sheet 2 4 ...

Page 125: ...e for reference as you read the information in this chapter Section Title Summary of Content Start Page Network Analyzer System Operation A summary of the theory of operation for the analyzer A summary of the operation of the major functional groups of the analyzer page 5 2 Synthesized Source Group Operation Operation of the assemblies associated with the source group page 5 6 Signal Separation Gr...

Page 126: ...eceiver group while the test signals are applied to the device under test DUT and then to the receiver group The LO signal is applied directly to the receiver group where it is mixed with the test and reference signals to produce IF signals for each of the eight receivers A D R1 R4 for 4 port models or four receivers A B R1 R2 for 2 port models These IF signals are downconverted and then sampled a...

Page 127: ...separated into major functional groups Each group consists of assemblies that perform a distinct function in the instrument Some of the assemblies are related to more than one group and all of the groups to some extent are interrelated and affect each other s performance The major functional groups are Synthesized Source Group Signal Separation Group Receiver Group Digital Processor and Digital Co...

Page 128: ...se reference signals are compared mixed with the LO signal in the receiver group to produce the 7 438 MHz or 0 826 MHz at frequencies below 53 MHz IF signal The incident signal output power is leveled by an internal automatic leveling control ALC circuit The maximum output power level of the network analyzer at the test ports is shown in the Data Sheet and Technical Specifications documents see hy...

Page 129: ... Digital Processor and Digital Control Group The digital processor and digital control group are divided into a front panel group and a data acquisition and processing group The front panel group provides communication to the network analyzer The data acquisition and processing group provides the output to the display in addition to signal processing and analyzer control Refer to Digital Processin...

Page 130: ...ng rear panel interconnects A23 Test Set Motherboard including rear panel interconnects Basic Operation Table 5 3 on page 5 9 lists the L O harmonic number the synthesizer frequencies A4 A15 and A17 the main source frequency A5 and A10 and the doubler frequencies A7 A8 A12 and A13 within the analyzer for each band This table is referred to throughout this chapter and also appears on the overall bl...

Page 131: ... A27 and A28 mixer bricks A D and R1 R4 where they are mixed with the LO signal from the A26 splitter to produce the 7 438 MHz or 0 826 MHz IF signal 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 This makes it possib...

Page 132: ...5 8 Keysight N5224A 25A Service Guide Theory of Operation Synthesized Source Group Operation 5 Figure 5 3 Source Group ...

Page 133: ...to 3 2074 3 000 to 3 200 3 000 to 3 200 3 000 to 3 200 10 1 3 2074 to 4 0074 3 2074 to 4 0074 3 200 to 4 000 3 200 to 4 000 3 200 to 4 000 11 1 4 0074 to 5 3394 4 0074 to 5 3394 4 000 to 5 332 4 000 to 5 332 4 000 to 5 332 12 1 5 3394 to 6 7594 5 3394 to 6 7594 5 332 to 6 752 5 332 to 6 752 5 332 to 6 752 13 1 6 7594 to 8 0074 6 7594 to 8 0074 6 752 to 8 000 6 752 to 8 000 6 752 to 8 000 14 1 8 00...

Page 134: ...2 1 12 0037 to 13 2537 24 0074 to 26 5074 12 000 to 13 250 12 000 to 13 250 24 000 to 26 500 23 3 8 8358 to 9 0051 8 8358 to 9 0051 13 250 to 13 504 13 250 to 13 504 26 500 to 27 008 24 3 9 0051 to 10 6691 9 0051 to 10 6691 6 752 to 8 000 13 504 to 16 000 27 008 to 32 000 25 3 10 6691 to 13 5025 10 6691 to 13 5025 8 000 to 10 125 16 000 to 20 250 32 000 to 40 500 26 3 6 7512 to 7 1106 13 5025 to 1...

Page 135: ...ussed here In bands 2 9 the A5 and A10 26 5 GHz source boards input signals from the A4 or A17 13 5 GHz synthesizer board are passed through to both outputs main and secondary unchanged For bands 10 15 and 19 23 the input signals are passed directly to the secondary output or amplified and filtered then sent to the main output For bands 16 18 and 24 30 the input signals are doubled filtered and am...

Page 136: ... In bands 2 15 and 23 25 the synthesized LO input is filtered amplified and passed through to the A26 splitter 4 port only In bands 16 22 and 26 30 the input is amplified doubled and filtered then sent to the output Together these signal paths create the full output frequency range of 10 MHz to 26 5 GHz that is sent to the A26 splitter 4 port only where the signal is divided and sent to the A27 an...

Page 137: ...connector that allows a 10 MHz reference signal produced by the A14 frequency reference board to be output for use in phase locking external test equipment TEST SET I O A DB 25 female connector that is used to control external test sets The external test set bus consists of 13 multiplexed address and data lines three control lines and an open collector interrupt line Pin assignments are listed in ...

Page 138: ... 0 V ground reference 8 LAS TTL out active low address strobe 1 μs min 9 11 AD4 AD2 TTL I O address and latched data 12 GND 0 V ground reference 13 Interrupt In TTL in low level 10 μs min aborts sweep 14 22 V 22 Vdc 100 mA max 15 16 SEL1 2 TTL out test set select bits 1 2 tied to 0 V 17 AD11 TTL I O address and latched data 18 SEL3 TTL out test set select bit 3 tied to 0 V 19 21 AD7 5 TTL I O addr...

Page 139: ...t TTL out latched 13 20 Port B0 7 Out TTL out latched 21 24 Port C I O TTL I O latched 25 28 Port D I O TTL I O latched 29 Port C Status TTL out low input mode high output mode 30 Port D Status TTL out low input mode high output mode 31 Output Strobe Write Strobe TTL out active low data write strobe 1 μs min 32 No connect Not used 33 Pass Fail TTL out latched indicates pass fail programmable polar...

Page 140: ...Hz BW 4 AnalogOut2 Analog Output Voltage Programmable 10 V 100 mA out Nominally 0 ohms 2 44 mV typical resolution 1 MHz BW 5 ACOM System ground 6 GndSense Ground sense for Analog In and Analog Out Connected with 51 1 ohms to ACOM 7 AnalogIn1 Analog input 10 V 1 22 mV typical resolution Rin 1 M ohm BW 1 MHz ADC conversion time 1 us typical 8 AnalogIn2 Analog input 10 V 1 22 mV typical resolution Ri...

Page 141: ...nalyzer and allows you to measure devices with higher power and higher dynamic range limits than an analyzer without the configurable test set On 4 port models there are twelve signal paths routed through front panel SMA jumpers in the configurable test set On 2 port models there are six signal paths routed through front panels jumpers in the configurable test set As shown in Figure 5 4 on page 5 ...

Page 142: ...onnects to CPLR THRU and CPLR ARM connects to SOURCE OUT While increasing forward S21 dynamic range the reverse S12 dynamic range is degraded by the same amount A29 A32 Receiver Couplers The source incident signals from the A5 and A10 26 5 GHz sources are sent to the A29 A32 receiver couplers where a portion of each signal is coupled off to provide the R1 R2 R3 and R4 receiver reference signals fo...

Page 143: ... models a step attenuator and a bias tee are placed in the signal path of each test port between the A29 A32 receiver couplers and the A33 A36 test port couplers The 60 dB step attenuators provide coarse power control for the test signals They are electro mechanical step attenuators that provide 0 to 60 dB of attenuation in 5 dB steps They adjust the power level to the DUT without changing the lev...

Page 144: ...5 20 Keysight N5224A 25A Service Guide Theory of Operation Signal Separation Group Operation 5 Figure 5 4 4 Port Signal Separation Group ...

Page 145: ...Keysight N5224A 25A Service Guide 5 21 Theory of Operation Signal Separation Group Operation Figure 5 5 2 Port Signal Separation Group ...

Page 146: ...n 5 dB steps These attenuators are controlled by the A21 CPU board A37 Reference Mixer Switch The A37 reference mixer switch is placed in the R1 reference signal path allowing this reference signal to be switched in and out of the signal path when an external mixer is being used in test configuration An external mixer is placed in measurement configuration between REFERENCE 1 SOURCE OUT and RCVR R...

Page 147: ...ADC All input signals are sampled simultaneously by the ADCs where they are converted to digital form The ADC conversions are triggered by timing signals from the digital signal processor DSP in response to commands from the central processing unit CPU The digitized data is processed into magnitude and phase data by the DSP and sent to the CPU random access memory RAM by way of the peripheral comp...

Page 148: ...ulse gate input A TTL 2 IFGateBin IF pulse gate input B TTL 3 IFGateCin IF pulse gate input C TTL 4 IFGateDin IF pulse gate input D TTL 5 IFGateRin IF pulse gate input R TTL 6 DCOM Digital ground 7 PulseSyncIn Pulse generator synchronization trigger input TTL 8 RFPulseModIn RF source pulse modulation drive input TTL 9 DCOM Digital ground 10 Pulse1Out Programmable pulse train output 1 TTL 11 Pulse2...

Page 149: ...Keysight N5224A 25A Service Guide 5 25 Theory of Operation Receiver Group Operation Figure 5 6 4 Port Receiver Group ...

Page 150: ...5 26 Keysight N5224A 25A Service Guide Theory of Operation Receiver Group Operation 5 Figure 5 7 2 Port Receiver Group ...

Page 151: ...display math processing functions and communications between the analyzer and an external controller or peripherals A block diagram of the digital control functional group is shown in Figure 5 8 on page 5 28 The digital control functional group consists of two subgroups Front Panel Subgroup A1 Front Panel Display Board A2 USB Board A3 Display Assembly Keypad Assembly A18 System Motherboard Data Ac...

Page 152: ...5 28 Keysight N5224A 25A Service Guide Theory of Operation Digital Processing and Digital Control Group Operation 5 Figure 5 8 Digital Processing and Digital Control Group ...

Page 153: ...system motherboard The A1 front panel interface board also includes a speaker that emits the audio signals received from the A21 CPU board A2 USB Board This board provides four universal serial bus USB jacks that are industry standard 4 pin connectors allowing multiple USB devices to be connected to the analyzer s front panel A3 Display Assembly The A3 display assembly contains a 10 inch LCD with ...

Page 154: ...log IF signal The resulting raw data is written into the main random access memory RAM The data taking sequence is triggered either externally from the rear panel or by firmware on the A21 CPU board A21 CPU Board The A21 CPU board contains the circuitry to control the operation of the analyzer Some of the components include the central processing unit CPU memory EEPROM ROM RAM bus lines to other b...

Page 155: ...ve SSD The SSD is a Serial Advanced Technology Attachment SATA data storage device which is connected directly to and physically mounted within the enclosure of the A21 CPU board The full operating system and firmware for the network analyzer is stored on the A55 SSD USB x4 Four universal serial bus USB jacks industry standard 4 pin connectors GPIB 0 Controller A 24 pin female type D 24 connector ...

Page 156: ...alog 9 V analog 3 3 V analog 5 2 V analog 15 V standby always on 32 V analog 15 V analog 5 2 V analog 7 V analog 5 1 V standby 12 V digital 3 35 V digital 5 1 V digital The 15 V standby supply remains on continuously whenever the power supply is plugged in This supply is used to provide power to front panel LEDs and CPU components when the analyzer is turned off Supply voltages which oscillate bet...

Page 157: ...How to order a replaceable part from Keysight Technologies page 6 2 Assembly Replacement Sequence The correct sequence for replacing a defective assembly page 6 3 Rebuilt Exchange Assemblies The definition of a rebuilt exchange assembly The procedure for replacing and returning a defective assembly to Keysight Technologies page 6 4 Replaceable Parts Listings Tables that list the assemblies by refe...

Page 158: ...chnologies for instructions on where to send the order Refer to Contacting Keysight on page 2 7 To order a part that is not listed in the replaceable parts lists include the instrument model number and complete instrument serial number include the description and function of the part indicate the quantity required Contact Keysight Technologies for instructions on where to send the order Refer to C...

Page 159: ...er that identifies the faulty assembly Step 2 Order a replacement assembly Refer to this chapter Step 3 Replace the faulty assembly and determine what adjustments are necessary Refer to Chapter 7 Repair and Replacement Procedures Step 4 Perform the necessary adjustments Refer to Chapter 3 Tests and Adjustments Step 5 Perform the necessary performance tests Refer to Chapter 3 Tests and Adjustments ...

Page 160: ...ired 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 The defective assembly must be returned for credit under the terms of the rebuilt exchange assembly program Spare assembly stock desired should be ordered using the new assembly part number ...

Page 161: ...Keysight N5224A 25A Service Guide 6 5 Replaceable Parts Rebuilt Exchange Assemblies Figure 6 1 Module Exchange Procedure ...

Page 162: ...escription Location A1 Front panel interface board Front Panel Assembly Back Side All Options on page 6 12 A2 USB board A3 Display assembly A4 13 5 GHz source 1 synthesizer board Top Assemblies and Cables All Options on page 6 16 A5 26 5 GHz source board 1 A6 Not used A7 Doubler 1 board A8 Doubler 2 board A9 Noise receiver board A10 26 5 GHz source board 2 A11 Not used A12 Doubler 3 board A13 Doub...

Page 163: ... coupler A31 Port 4 receiver coupler A32 Port 2 receiver coupler A33 Port 1 test port coupler A34 Port 3 test port coupler A35 Port 4 test port coupler A36 Port 2 test port coupler A37 Reference mixer switch A38 Port 1 source step attenuator A39 Port 3 source step attenuator A40 Port 4 source step attenuator A41 Port 2 source step attenuator A42 Port 1 bias tee A43 Port 3 bias tee A44 Port 4 bias ...

Page 164: ... Assemblies and Cables by Option Set 2 Port Configuration Option 200 on page 6 22 2 Port Configuration Option 201 on page 6 28 2 Port Configuration Option 210 on page 6 34 2 Port Configuration Option 217 on page 6 40 2 Port Configuration Option 219 on page 6 47 4 Port Configuration Option 400 on page 6 54 4 Port Configuration Option 401 on page 6 61 4 Port Configuration Option 410 on page 6 68 4 P...

Page 165: ...ls on page 6 106 Documentation on page 6 106 GPIB Cables GPIB Adapter on page 6 107 Fuses on page 6 107 Battery on page 6 107 Analyzer Accessories on page 6 108 USB Accessories on page 6 108 ESD Supplies on page 6 108 Rack Mount Kits and Handle Kits on page 6 108 Table 6 2 Part Number Listing by Type of Part ...

Page 166: ...nt panel Note Front handle screws not shown a 5041 9176 2 Trim strip filler For analyzers with handles N5242 80005 1 Keypad overlay N5227 80008 1 Front panel overlay 2 port Option 200 N5227 80009 Front panel overlay 2 port Option 201 N5227 80002 Front panel overlay 2 port Option 210 N5225 80002 Front panel overlay 2 port Option 217 N5227 80009 Front panel overlay 2 port Option 219 N5227 80004 Fron...

Page 167: ... Service Guide 6 11 Replaceable Parts Replaceable Parts Listings Figure 6 2 Front Panel Assembly Front Side All Options a Refer to Rack Mount Kits and Handle Kits on page 6 108 for part numbers of complete rack mount kits ...

Page 168: ... 6 to attach display to front frame 6 to attach LCD display assy to bracket and 4 to attach USB board to front frame E6601 61028 1 Cable A3 front panel interface board to inverter board 0515 1934 Machine screw M2 5 x 6 pan head To attach inverter board and USB controller board to display hold down bracket a critical footnote 0950 5396 LED 0950 4420 Tube 1 Inverter board 0960 3063 Was 0960 2804 1 T...

Page 169: ...0027 1 LCD display rear plate N5242 60043 1 LCD display cable a critical footnote N5242 20168 LED 2 LCD display side bracket a critical footnote 8121 2132 LED 8121 1451 Tube 1 Cable assembly for LCD backlight 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 eithe...

Page 170: ...6 14 Keysight N5224A 25A Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 3 Front Panel Assembly Back Side All Options Figure 6 4 A3 Display Assembly with Old LCD Display 2090 0883 ...

Page 171: ...Keysight N5224A 25A Service Guide 6 15 Replaceable Parts Replaceable Parts Listings Figure 6 5 A3 Display Assembly with New LCD Display 2090 1036 ...

Page 172: ... 1 Doubler assembly port 4 A14 N5240 60069 1 Frequency reference board A15 N5240 60074 Was N5242 60150 1 13 5 GHz LO synthesizer board A16 N5240 60077 Was N5240 60056 1 Signal Processing ADC Module SPAM board A17 N5240 60074 Was N5242 60150 1 13 5 GHz source 2 synthesizer board A18 N5247 60002 1 System motherboard A19 W1312 60095 1 Midplane board A20 0950 4934 1 Power supply A21 W1312 60196 1 CPU ...

Page 173: ...e 7 10 for an illustration c You can learn your System CPU version using the PNA software On the PNA front panel press Help About Network Ana lyzer In the window displayed find System CPU Version d For more information on the N8983A SSD refer to the Windows 7 Operating System Upgrade Kit Installation Note available online at http literature cdn keysight com litweb pdf N8983 90001 pdf e The lithium...

Page 174: ...6 18 Keysight N5224A 25A Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 6 Top Assemblies All Options ...

Page 175: ...rt 3 doubler to W14 2 port or W111 4 port W15 SR N5245 20036 1 A13 port 4 doubler to W16 2 port or W115 4 port W17 SR N5245 20036 1 A8 port 2 doubler to W18 2 port or W119 4 port W51 SR N5245 20101 1 A15 13 5 GHz LO synthesizer board J1207 to A25 HMA26 5 W55 SR N5245 20102 1 A7 port 1 doubler to W56 located on bottom of board W69 F N5242 60012 1 A24 IF multiplexer board P3 to A16 SPAM board J1 W70...

Page 176: ...79 Rear panel 10 MHz REF IN to A14 frequency reference board J2 W149 F N5247 60023 1 A24 IF multiplexer board P603 to A16 SPAM board J2 W150 F N5247 60024 1 A24 IF multiplexer board P203 to A16 SPAM board J5 a SR semirigid coaxial cable F flexible coaxial cable nR n wires in a ribbon flat cable nW n wires in a wire harness Ref Desig Typea Part Number Qty Description ...

Page 177: ...Keysight N5224A 25A Service Guide 6 21 Replaceable Parts Replaceable Parts Listings Figure 6 7 Top Cables All Cables All Options ...

Page 178: ...7760 2 Test port 1 receiver coupler Test port 2 receiver coupler A33 A36 5087 7793 2 Test port 1 coupler Test port 2 coupler N5240 60058 2 Front panel LED board A68 08490 60039 1 3 dB attenuator pad connected to mixer brick R1 a Part numbers in italic typeface are for rebuilt exchange assemblies Refer to Rebuilt Exchange Assemblies on page 6 4 b All new units built after August 2009 no longer use ...

Page 179: ...Keysight N5224A 25A Service Guide 6 23 Replaceable Parts Replaceable Parts Listings Figure 6 8 Bottom Assemblies Standard 2 Port Configuration Option 200 ...

Page 180: ... A36 port 2 coupler W118 SR N5224 20009 1 A36 port 2 coupler to mixer brick B W110 SR N5224 20006 1 A32 port 2 receiver coupler to mixer brick R2 W51 SR Refer to Top Cables All Cables All Options on page 6 19 W56 SR N5245 20103 1 W55 to rear panel EXT TSET DRIVE RF OUT J6 W57 SR N5245 20012 1 A27 mixer brick to rear panel EXT TSET DRIVE LO OUT J5 W61 F N5242 60017 1 A27 mixer brick A to A24 IF mul...

Page 181: ...Keysight N5224A 25A Service Guide 6 25 Replaceable Parts Replaceable Parts Listings Figure 6 9 Bottom RF Cables Standard 2 Port Configuration Option 200 ...

Page 182: ...J1 20R N5247 60015 Was N5245 60008 A23 test set motherboard J551 to A27 mixer brick 1 J52 3W N5225 60001 A23 test set motherboard J222 to ports 2 4 LED board J1 24R N5230 60014 Was N5242 60011 A23 test set motherboard J209 to A25 HMA26 5 J1 100R N5242 60004 A18 system motherboard J1 to A23 test set motherboard J1 to A24 IF multiplexer board J1 25R E4410 60160 A18 system motherboard J13 to A23 test...

Page 183: ...Keysight N5224A 25A Service Guide 6 27 Replaceable Parts Replaceable Parts Listings Figure 6 10 Bottom Ribbon Cables and Wire Harnesses Standard 2 Port Configuration Option 200 ...

Page 184: ...7 7760 2 Test port 1 receiver coupler Test port 2 receiver coupler A33 A36 5087 7793 2 Test port 1 coupler Test port 2 coupler A37 5087 7759 1 Reference mixer switch N5240 60058 2 Front panel LED board a Part numbers in italic typeface are for rebuilt exchange assemblies Refer to Rebuilt Exchange Assemblies on page 6 4 b All new units built after August 2009 no longer use the N5242 60031 cable tha...

Page 185: ...Keysight N5224A 25A Service Guide 6 29 Replaceable Parts Replaceable Parts Listings Figure 6 11 Bottom Assemblies 2 Port Option 201 ...

Page 186: ... 20155 Was N5245 20104 6 Front panel jumper W37 SR N5245 20041 1 Port 1 RCVR A IN to A27 mixer brick A W40 SR N5245 20042 1 Front panel port 2 RCVR B IN to A27 mixer brick B W41 SR N5245 20007 1 A37 reference mixer switch to front panel REF 1 SOURCE OUT W42 SR N5245 20006 1 REF 1 RCVR R1 IN to A37 reference mixer switch W43 SR N5245 20009 1 A37 reference mixer switch to A27 mixer brick R1 W46 SR N...

Page 187: ...Keysight N5224A 25A Service Guide 6 31 Replaceable Parts Replaceable Parts Listings Figure 6 12 Bottom RF Cables 2 Port Option 201 ...

Page 188: ...1 to ports 1 3 LED board J1 20R N5247 60015 Was N5245 60008 A23 test set motherboard J551 to A27 mixer brick 1 J52 3W N5225 60001 A23 test set motherboard J222 to ports 2 4 LED board J1 24R N5230 60014 Was N5242 60011 A23 test set motherboard J209 to A25 HMA26 5 J1 100R N5242 60004 A18 system motherboard J1 to A23 test set motherboard J1 to A24 IF multiplexer board J1 25R E4410 60160 A18 system mo...

Page 189: ...Keysight N5224A 25A Service Guide 6 33 Replaceable Parts Replaceable Parts Listings Figure 6 13 Bottom Ribbon Cables and Wire Harnesses 2 Port Option 201 ...

Page 190: ...ceiver coupler A33 A36 5087 7793 2 Test port 1 coupler Test port 2 coupler A64 A67 08490 60040 2 Test port 1 6 dB attenuator Test port 2 6 dB attenuator N5240 60058 2 Front panel LED board A68 08490 60039 1 3 dB attenuator pad connected to mixer brick R1 a Part numbers in italic typeface are for rebuilt exchange assemblies Refer to Rebuilt Exchange Assemblies on page 6 4 b All new units built afte...

Page 191: ...Keysight N5224A 25A Service Guide 6 35 Replaceable Parts Replaceable Parts Listings Figure 6 14 Bottom Assemblies 2 Port Option 210 ...

Page 192: ...ttenuator W118 SR N5224 20009 1 A36 port 2 coupler to mixer brick B W110 SR N5224 20006 1 A32 port 2 receiver coupler to mixer brick R2 W51 SR Refer to Top Cables All Cables All Options on page 6 19 W56 SR N5245 20103 1 W55 to rear panel EXT TSET DRIVE RF OUT J6 W57 SR N5245 20012 1 A27 mixer brick to rear panel EXT TSET DRIVE LO OUT J5 W61 F N5242 60017 1 A27 mixer brick A to A24 IF multiplexer P...

Page 193: ...Keysight N5224A 25A Service Guide 6 37 Replaceable Parts Replaceable Parts Listings Figure 6 15 Bottom RF Cables 2 Port Option 210 ...

Page 194: ... 60015 Was N5245 60008 A23 test set motherboard J551 to A27 mixer brick 1 J52 3W N5225 60001 A23 test set motherboard J222 to ports 2 4 LED board J1 24R N5230 60014 Was N5242 60011 A23 test set motherboard J209 to A25 HMA26 5 J1 100R N5242 60004 A18 system motherboard J1 to A23 test set motherboard J1 to A24 IF multiplexer board J1 25R E4410 60160 A18 system motherboard J13 to A23 test set motherb...

Page 195: ...Keysight N5224A 25A Service Guide 6 39 Replaceable Parts Replaceable Parts Listings Figure 6 16 Bottom Ribbon Cables and Wire Harnesses 2 Port Option 210 ...

Page 196: ... 7793 2 Test port 1 coupler Test port 2 coupler A37 5087 7759 1 Reference mixer switch A38 A41 33325 60016 2 Test port 1 source attenuator Test port 2 source attenuator A46 A49 33325 60017 2 Port 1 receiver attenuator Port 2 receiver attenuator N5240 60058 2 Front panel LED board a Part numbers in italic typeface are for rebuilt exchange assemblies Refer to Rebuilt Exchange Assemblies on page 6 4 ...

Page 197: ...Keysight N5224A 25A Service Guide 6 41 Replaceable Parts Replaceable Parts Listings Figure 6 17 Bottom Assemblies 2 Port Option 217 ...

Page 198: ...rence mixer switch to A27 mixer brick R1 W47 SR N5245 20119 1 A27 mixer brick R2 to front panel REF 2 RCVR R2 IN W51 SR Refer to Top Cables All Cables All Options on page 6 19 W56 SR N5245 20103 1 W55 to rear panel EXT TSET DRIVE RF OUT J6 W57 SR N5245 20012 1 A27 mixer brick to EXT TSET DRIVE LO OUT J5 W61 F N5242 60017 1 A27 mixer brick A to A24 IF multiplexer P1 W62 F N5242 60025 1 A27 mixer br...

Page 199: ...Parts Listings W103 SR N5245 20055 1 Port 2 RCVR B IN to A49 port 2 receiver attenuator W104 SR N5245 20057 1 A49 port 2 receiver attenuator to A27 mixer brick B a SR semirigid coaxial cable F flexible coaxial cable Reference Designator Typea Part Number Qty Description ...

Page 200: ...6 44 Keysight N5224A 25A Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 18 Bottom RF Cables 2 Port Option 217 ...

Page 201: ...rts 1 3 LED board J1 20R N5247 60015 Was N5245 60008 A23 test set motherboard J551 to A27 mixer brick 1 J52 3W N5225 60001 A23 test set motherboard J222 to ports 2 4 LED board J1 16R N5245 60006 A23 test set motherboard J546 to A41 port 2 source attenuator 10R N5245 60026 Was 8121 0982 or N5242 60007 A23 test set motherboard J208 to A49 port 2 receiver attenuator 24R N5230 60014 Was N5242 60011 A2...

Page 202: ...6 46 Keysight N5224A 25A Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 19 Bottom Ribbon Cables and Wire Harnesses 2 Port Option 217 ...

Page 203: ... A37 5087 7759 1 Reference mixer switch A38 A41 33325 60016 2 Test port 1 source attenuator Test port 2 source attenuator A42 A45 5087 7789 2 Test port 1 bias tee includes wire harness Test port 2 bias tee includes wire harness A46 A49 33325 60017 2 Port 1 receiver attenuator Port 2 receiver attenuator N5240 60058 2 Front panel LED board a Part numbers in italic typeface are for rebuilt exchange a...

Page 204: ...6 48 Keysight N5224A 25A Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 20 Bottom Assemblies 2 Port Option 219 ...

Page 205: ...op Cables All Cables All Options on page 6 19 W56 SR N5245 20103 1 W55 to rear panel EXT TSET DRIVE RF OUT J6 W57 SR N5245 20012 1 A27 mixer brick to EXT TSET DRIVE LO OUT J5 W61 F N5242 60017 1 A27 mixer brick A to A24 IF multiplexer P1 W62 F N5242 60025 1 A27 mixer brick R1 to A24 IF multiplexer P601 W63 F N5242 60026 1 A27 mixer brick R2 to A24 IF multiplexer P801 W64 F N5242 60018 1 A27 mixer ...

Page 206: ...1 receiver attenuator W98 SR N5245 20056 1 A46 port 1 receiver attenuator to A27 mixer brick A W103 SR N5245 20055 1 Port 2 RCVR B IN to A49 port 2 receiver attenuator W104 SR N5245 20057 1 A49 port 2 receiver attenuator to A27 mixer brick B a SR semirigid coaxial cable F flexible coaxial cable Reference Designator Typea Part Number Qty Description ...

Page 207: ...Keysight N5224A 25A Service Guide 6 51 Replaceable Parts Replaceable Parts Listings Figure 6 21 Bottom RF Cables 2 Port Option 219 ...

Page 208: ...erboard J551 to A27 mixer brick 1 J52 2W P O bias tee A23 test set motherboard J541 to A42 port 1 bias tee 3W N5225 60001 A23 test set motherboard J222 to ports 2 4 LED board J1 2W P O bias tee A23 test set motherboard J542 to A45 port 2 bias tee 16R N5245 60006 A23 test set motherboard J546 to A41 port 2 source attenuator 10R N5245 60026 Was 8121 0982 or N5242 60007 A23 test set motherboard J208 ...

Page 209: ...Keysight N5224A 25A Service Guide 6 53 Replaceable Parts Replaceable Parts Listings Figure 6 22 Bottom Ribbon Cables and Wire Harnesses 2 Port Option 219 ...

Page 210: ... port 3 receiver coupler Test port 4 receiver coupler Test port 2 receiver coupler A33 A34 A35 A36 5087 7793 4 Test port 1 coupler Test port 3 coupler Test port 4 coupler Test port 2 coupler N5240 60058 2 Front panel LED board A68 A69 08490 60039 2 3 dB attenuator pad connected to mixer brick R1 and R4 a Part numbers in italic typeface are for rebuilt exchange assemblies Refer to Rebuilt Exchange ...

Page 211: ...Keysight N5224A 25A Service Guide 6 55 Replaceable Parts Replaceable Parts Listings Figure 6 23 Bottom Assemblies Standard 4 Port Configuration Option 400 ...

Page 212: ...27 1 A31 port 4 receiver coupler to A28 mixer brick R4 A69 3 dB pad W117 SR N5224 20026 1 A35 port 4 coupler to A28 mixer brick D W114 SR N5224 20014 1 A32 port 2 receiver coupler to A36 port 2 coupler W118 SR N5224 20025 1 A36 port 2 coupler to A27 mixer brick B W110 SR N5224 20028 1 A32 port 2 receiver coupler to A27 mixer brick R2 W51 SR Refer to Top Cables All Cables All Options on page 6 19 W...

Page 213: ...8 F N5242 60023 1 A28 mixer brick C to A24 IF multiplexer P601 W69 73 F Refer to Top Cables All Cables All Options on page 6 19 N5247 20138 1 Dust cap A28 mixer brick termination a SR semirigid coaxial cable F flexible coaxial cable Reference Designator Typea Part Number Qty Description ...

Page 214: ...6 58 Keysight N5224A 25A Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 24 Bottom RF Cables Standard 4 Port Configuration Option 400 ...

Page 215: ...t motherboard J221 to ports 1 3 LED board J1 20R N5247 60015 Was N5245 60008 A23 test set motherboard J551 to A27 mixer brick 1 J52 3W N5225 60001 A23 test set motherboard J222 to ports 2 4 LED board J1 24R N5230 60014 Was N5242 60011 A23 test set motherboard J209 to A25 HMA26 5 J1 100R N5242 60004 A18 system motherboard J1 to A23 test set motherboard J1 to A24 IF multiplexer board J1 25R E4410 60...

Page 216: ...6 60 Keysight N5224A 25A Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 25 Bottom Ribbon Cables and Wire Harnesses Standard 4 Port Configuration Option 400 ...

Page 217: ...est port 4 receiver coupler Test port 2 receiver coupler A33 A34 A35 A36 5087 7793 4 Test port 1 coupler Test port 3 coupler Test port 4 coupler Test port 2 coupler A37 5087 7759 1 Reference mixer switch A69 08490 60039 2 3 dB attenuator pad connected to mixer brick R4 N5240 60058 2 Front panel LED board a Part numbers in italic typeface are for rebuilt exchange assemblies Refer to Rebuilt Exchang...

Page 218: ...6 62 Keysight N5224A 25A Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 26 Bottom Assemblies 4 Port Option 401 ...

Page 219: ...t 3 coupler to front panel Port 3 CPLR ARM W27 SR N5245 20052 1 A31 port 4 receiver coupler to front panel Port 4 SOURCE OUT W28 SR N5245 20096 1 Port 4 CPLR THRU to A35 port 4 coupler W29 SR N5245 20017 1 A31 port 4 receiver coupler to front panel REF 4 SOURCE OUT W30 SR N5245 20018 1 A35 port 4 coupler to front panel port 4 CPLR ARM W31 SR N5245 20040 1 A32 port 2 receiver coupler to front panel...

Page 220: ...T J6 W57 SR N5245 20012 1 A27 mixer brick to EXT TSET DRIVE LO OUT J5 W61 F N5242 60017 1 A27 mixer brick A to A24 IF multiplexer P1 W62 F N5242 60021 1 A27 mixer brick R1 to A24 IF multiplexer P411 W63 F N5242 60022 1 A27 mixer brick R2 to A24 IF multiplexer P412 W64 F N5242 60018 1 A27 mixer brick B to A24 IF multiplexer P201 W65 F N5242 60024 1 A28 mixer brick D to A24 IF multiplexer P801 W66 F...

Page 221: ...Keysight N5224A 25A Service Guide 6 65 Replaceable Parts Replaceable Parts Listings Figure 6 27 Bottom RF Cables 4 Port Option 401 ...

Page 222: ...3W N5225 60001 A23 test set motherboard J221 to ports 1 3 LED board J1 20R N5247 60015 Was N5245 60008 A23 test set motherboard J551 to A27 mixer brick 1 J52 3W N5225 60001 A23 test set motherboard J222 to ports 2 4 LED board J1 24R N5230 60014 Was N5242 60011 A23 test set motherboard J209 to A25 HMA26 5 J1 100R N5242 60004 A18 system motherboard J1 to A23 test set motherboard J1 to A24 IF multipl...

Page 223: ...Keysight N5224A 25A Service Guide 6 67 Replaceable Parts Replaceable Parts Listings Figure 6 28 Bottom Ribbon Cables and Wire Harnesses 4 Port Option 401 ...

Page 224: ... A33 A34 A35 A36 5087 7793 4 Test port 1 coupler Test port 3 coupler Test port 4 coupler Test port 2 coupler A64 A65 A66 A67 08490 60040 4 Test port 1 6 dB attenuator Test port 3 6 dB attenuator Test port 4 6 dB attenuator Test port 2 6 dB attenuator N5240 60058 2 Front panel LED board A68 A69 08490 60039 2 3 dB attenuator pad connected to mixer brick R1 and R4 a Part numbers in italic typeface ar...

Page 225: ...Keysight N5224A 25A Service Guide 6 69 Replaceable Parts Replaceable Parts Listings Figure 6 29 Bottom Assemblies 4 Port Option 410 ...

Page 226: ...1 A31 port 4 receiver coupler to A28 mixer brick R4 A69 3 dB pad W117 SR N5224 20026 1 A35 port 4 coupler to A28 mixer brick D W122 SR N5224 20019 1 A67 port 2 6 dB attenuator to A36 port 2 coupler W118 SR N5224 20025 1 A36 port 2 coupler to A27 mixer brick B W110 SR N5224 20028 1 A32 port 2 receiver coupler to A27 mixer brick R2 W51 SR Refer to Top Cables All Cables All Options on page 6 19 W52 S...

Page 227: ... R3 to A24 IF multiplexer P413 W68 F N5242 60023 1 A28 mixer brick C to A24 IF multiplexer P601 W69 73 F Refer to Top Cables All Cables All Options on page 6 19 N5247 20138 1 Dust cap A28 mixer brick termination a SR semirigid coaxial cable F flexible coaxial cable Reference Designator Typea Part Number Qty Description ...

Page 228: ...6 72 Keysight N5224A 25A Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 30 Bottom RF Cables 4 Port Option 410 ...

Page 229: ...rd J221 to ports 1 3 LED board J1 20R N5247 60015 Was N5245 60008 A23 test set motherboard J551 to A27 mixer brick 1 J52 3W N5225 60001 A23 test set motherboard J222 to ports 2 4 LED board J1 24R N5230 60014 Was N5242 60011 A23 test set motherboard J209 to A25 HMA26 5 J1 100R N5242 60004 A18 system motherboard J1 to A23 test set motherboard J1 to A24 IF multiplexer board J1 25R E4410 60160 A18 sys...

Page 230: ...6 74 Keysight N5224A 25A Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 31 Bottom Ribbon Cables and Wire Harnesses 4 Port Option 410 ...

Page 231: ... Test port 2 coupler A37 5087 7759 1 Reference mixer switch A38 A39 A40 A41 33325 60016 4 Test port 1 source attenuator Test port 3 source attenuator Test port 4 source attenuator Test port 2 source attenuator A46 A47 A48 A49 33325 60017 4 Port 1 receiver attenuator Port 3 receiver attenuator Port 4 receiver attenuator Port 2 receiver attenuator N5240 60058 2 Front panel LED board A69 08490 60039 ...

Page 232: ...6 76 Keysight N5224A 25A Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 32 Bottom Assemblies 4 Port Option 417 ...

Page 233: ...SR N5245 20009 1 A37 reference mixer switch to A27 mixer brick R1 W47 SR N5245 20115 1 REF 2 RCVR R2 IN to A27 mixer brick R2 W51 SR Refer to Top Cables All Cables All Options on page 6 19 W52 SR N5245 20013 1 A25 HMA26 5 to A26 splitter W53 SR N5245 20023 1 A26 splitter to A27 mixer brick W56 SR N5245 20103 1 W55 to rear panel EXT TSET DRIVE RF OUT J6 W57 SR N5245 20012 1 A27 mixer brick to EXT T...

Page 234: ... A46 port 1 receiver attenuator to A27 mixer brick A W103 SR N5245 20055 1 Port 2 RCVR B IN to A49 port 2 receiver attenuator W104 SR N5245 20057 1 A49 port 2 receiver attenuator to A27 mixer brick B a SR semirigid coaxial cable F flexible coaxial cable Reference Designator Typea Part Number Qty Description ...

Page 235: ...Keysight N5224A 25A Service Guide 6 79 Replaceable Parts Replaceable Parts Listings Figure 6 33 Bottom RF Cables 4 Port Option 417 Ports 1 and 2 ...

Page 236: ...d on A28 mixer brick R4 W54 SR N5245 20022 1 A26 splitter to A28 mixer brick W65 F N5242 60024 1 A28 mixer brick D to A24 IF multiplexer P801 W66 F N5242 60019 1 A28 mixer brick R4 to A24 IF multiplexer P414 W67 F N5242 60020 1 A28 mixer brick R3 to A24 IF multiplexer P413 W68 F N5242 60023 1 A28 mixer brick C to A24 IF multiplexer P601 W85 SR N5245 20026 1 A30 port 3 receiver coupler to A39 port ...

Page 237: ...Keysight N5224A 25A Service Guide 6 81 Replaceable Parts Replaceable Parts Listings Figure 6 34 Bottom RF Cables 4 Port Option 417 Ports 3 and 4 ...

Page 238: ... test set motherboard J547 to A39 port 3 source attenuator 3W N5225 60001 A23 test set motherboard J222 to ports 2 4 LED board J1 16R N5245 60006 A23 test set motherboard J548 to A40 port 4 source attenuator 10R N5245 60026 Was 8121 0982 or N5242 60007 A23 test set motherboard J207 to A48 port 4 receiver attenuator 10R N5245 60026 Was 8121 0982 or N5242 60007 A23 test set motherboard J208 to A49 p...

Page 239: ...Keysight N5224A 25A Service Guide 6 83 Replaceable Parts Replaceable Parts Listings Figure 6 35 Bottom Ribbon Cables Wire Harnesses 4 Port Option 417 ...

Page 240: ... 1 source attenuator Test port 3 source attenuator Test port 4 source attenuator Test port 2 source attenuator A42 A43 A44 A45 5087 7789 4 Test port 1 bias tee includes wire harness Test port 3 bias tee includes wire harness Test port 4 bias tee includes wire harness Test port 2 bias tee includes wire harness A46 A47 A48 A49 33325 60017 4 Port 1 receiver attenuator Port 3 receiver attenuator Port ...

Page 241: ...Keysight N5224A 25A Service Guide 6 85 Replaceable Parts Replaceable Parts Listings Figure 6 36 Bottom Assemblies 4 Port Option 419 ...

Page 242: ...51 SR Refer to Top Cables All Cables All Options on page 6 19 W52 SR N5245 20013 1 A25 HMA26 5 to A26 splitter W53 SR N5245 20023 1 A26 splitter to A27 mixer brick W56 SR N5245 20103 1 W55 to rear panel EXT TSET DRIVE RF OUT J6 W57 SR N5245 20012 1 A27 mixer brick to EXT TSET DRIVE LO OUT J5 W61 F N5242 60017 1 A27 mixer brick A to A24 IF multiplexer P1 W62 F N5242 60021 1 A27 mixer brick R1 to A2...

Page 243: ... Port 1 RCVR A IN to A46 port 1 receiver attenuator W98 SR N5245 20056 1 A46 port 1 receiver attenuator to A27 mixer brick A W103 SR N5245 20055 1 Port 2 RCVR B IN to A49 port 2 receiver attenuator W104 SR N5245 20057 1 A49 port 2 receiver attenuator to A27 mixer brick B a SR semirigid coaxial cable F flexible coaxial cable Reference Designator Typea Part Number Qty Description ...

Page 244: ...6 88 Keysight N5224A 25A Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 37 Bottom RF Cables 4 Port Option 419 Ports 1 and 2 ...

Page 245: ...lexer P414 W67 F N5242 60020 1 A28 mixer brick R3 to A24 IF multiplexer P413 W68 F N5242 60023 1 A28 mixer brick C to A24 IF multiplexer P601 W85 SR N5245 20026 1 A30 port 3 receiver coupler to A39 port 3 source attenuator W86 SR N5245 20027 1 A39 port 3 source attenuator to front panel Port 3 SOURCE OUT W87 SR N5245 20089 1 Port 3 CPLR THRU to A43 port 3 bias tee W88 SR N5245 20086 1 A43 port 3 b...

Page 246: ...6 90 Keysight N5224A 25A Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 38 Bottom RF Cables 4 Port Option 419 Ports 3 and 4 ...

Page 247: ...23 test set motherboard J541 to A42 port 1 bias tee 2W P O bias tee A23 test set motherboard J543 to A43 port 3 bias tee 2W P O bias tee A23 test set motherboard J544 to A44 port 4 bias tee 3W N5225 60001 A23 test set motherboard J222 to ports 2 4 LED board J1 2W P O bias tee A23 test set motherboard J542 to A45 port 2 bias tee 16R N5245 60006 A23 test set motherboard J548 to A40 port 4 source att...

Page 248: ...de Replaceable Parts Replaceable Parts Listings 6 36R 8121 0834 Rear panel HANDLER I O to A23 test set motherboard J400 a nR n wires in a ribbon flat cable nW n wires in a wire harness Reference Designator Typea Part Number Description 22 ...

Page 249: ...Keysight N5224A 25A Service Guide 6 93 Replaceable Parts Replaceable Parts Listings Figure 6 39 Bottom Ribbon Cables and Wire Harnesses 4 Port Option 419 ...

Page 250: ...ns on page 6 105 6960 0149 1 Hole plug 2190 0958 Was 2190 0034 Lock washer 0380 0644 Jack screw N5245 00008 1 Rear panel 3050 2330 Lock washer For A24 IF MUX board connectors 2950 0414 Hex nut For A24 IF MUX board connectors 2190 0584 Lock washer 0380 4670 Jack screw 0 442 inch length 1251 7812 Jack screw 0 5 inch length N5242 60005 1 PWR I O cable assembly 1253 8234a 1 Connector D subminiature fi...

Page 251: ...0 Rear Panel Assembly All Options 6960 0523 9 Hole plug 2190 0102 Lock washer 2950 0035 Hex nut 8120 5063 2 BNC cable a This part number is no longer required on s n s 5541 5542 5544 5545 5547 5549 and newer But is included for your ref erence Item Number Part Number Qty Description 22 23 24 25 ...

Page 252: ...198 5 Fan guard 0361 1272 20 Fan rivet N5245 00006 1 Fan bracket for 2 fans N5245 00003 1 Fan bracket for 3 fans 0515 0372 Machine screw M3 0 x 8 pan head To attach 7 to attach the 2 fan assy to chassis 5 to attach the 3 fan assy to chassis Chassis Refer to Internal Hardware and Miscellaneous Parts All Options on page 6 103 E4440 00021 2 EMI shield round adhesive Located on center hub of 2 fans on...

Page 253: ...Keysight N5224A 25A Service Guide 6 97 Replaceable Parts Replaceable Parts Listings Figure 6 41 Fan Assemblies Side View All Options ...

Page 254: ...o power supply 0515 0372 Machine screw M3 0 x 8 pan head 4 to attach power supply bracket to inner panels 6 to attach A18 system motherboard to chassis 0400 0353 6 Midplane board grommets 5041 7250 2 Wire loom 0515 0380 Machine screw M4 0 x 10 pan head To attach all doubler and all source boards to inner panels not shown N5247 20136 2 Bracket 26 5 GHz source board A5 and A10 not shown 0515 2078 Ma...

Page 255: ...Keysight N5224A 25A Service Guide 6 99 Replaceable Parts Replaceable Parts Listings Figure 6 42 Top Hardware and Miscellaneous Parts Top View All Options ...

Page 256: ...and coupler plate assy to test set deck front bias tee brackets to the chassis 0515 2007 Machine screw M3 0 x 14 To attach splitter to top of mixer brick mounting block 08490 60039 1 A69 3 dB pad For A28 mixer brick R4 N5245 20002 1 Mounting block For A27 and A28 mixer bricks 0515 0374 Machine screw M3 0 x 10 pan head To attach mixer brick mounting block and receiver coupler mounting brackets refe...

Page 257: ... attach front panel LED boards not shown 0515 0669 Machine screw M4 0 x 0 7 pan head To attach A24 IF MUX to t set deck N5245 00011 4 Bracket For all bias tees E4403 20033 4 Gap pad Between each coupler and test set front sub panel N5242 00019 1 Stabilizer bracket Between A23 test set motherboard and A24 IF mux board 0460 2725 2 Coupler vibration mount Between port 1 port 2 couplers test set front...

Page 258: ...6 102 Keysight N5224A 25A Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 43 Bottom Hardware and Miscellaneous Parts ...

Page 259: ...side inner bracket W1312 00048 1 Midplane bracket N5247 00015 1 Right side inner bracket N5224 00001 1 Chassis 0515 0372 Machine screw M3 0 x 8 pan head To attach midplane bracket to left and right side inner brackets front bracket to left and right side inner brackets chassis to left and right side inner brackets midplane bracket and front bracket N5247 00013 1 Front bracket N5242 40002 24 PC boa...

Page 260: ...6 104 Keysight N5224A 25A Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 44 Internal Hardware and Miscellaneous Parts All Options ...

Page 261: ... foot N5247 60003 2 Strap handle assembly Includes item 0515 0710 Machine screw M5 0 x 18 flat head To attach strap handles 5021 2840 4 Key lock for bottom foot 5041 9167 4 Bottom foot W1312 40032 4 Hole plug When analyzer is rack mounted 0515 0372 Machine screw M3 0 x 8 pan head To attach inner cover N5247 00004 1 Inner cover retaining shield 0515 1227 Machine screw M3 0 x 6 flat head To attach i...

Page 262: ...t Numbers Table 6 3 Part Numbers for Miscellaneous Parts and Accessories Description Model or Part Number Service Tools 1 4 inch and 5 16 inch open end wrench thin profile 8710 0510 5 16 inch 8 mm open end wrench 8710 2174 1 2 inch to 9 16 inch 8 mm open end wrench 8710 1770 20 mm open end torque wrench 0 9 N m 8 in lb 8710 1764 Spanner wrench 08513 20014 Documentation ...

Page 263: ... GPIB cable 2 meter 6 6 feet 10833B GPIB cable 4 meter 13 2 feet 10833C GPIB cable to GPIB cable adapter 10834A Protective Covers for Connectors Cap protective 0 812 ID 1401 0214 Cap protective 0 625 ID 1401 0225 Cap protective 1 4 36 threads 5188 5406 Protective guard for outer two sets of front panel jumpers N5242 00029 Protective guard for center two sets of front panel jumpers N5242 00030 Fuse...

Page 264: ...Analyzer Options Accessories and Upgrades Available on page 2 3 for a complete list of upgrades orderable by model number Rack Mount Kits and Handle Kits Rack mount kit for analyzers without handles Option 1CM N5231AU 1CM or N5232AU 1CM or N5239AU 1CM Option 1CM includes the following separately orderable items Rack mount kit rack mount flanges and hardware 1CM042A Was 5063 9217 Rack mount rail se...

Page 265: ...on cover 6010 1147 Parchment white for use on rack mount flanges rack support flanges and front panels 6010 1148 a For rack mount use you must replace factory installed ruggedized handles thick aluminum no trim with classic handles thin aluminum with plastic trim included with Option 1CP Table 6 3 Part Numbers for Miscellaneous Parts and Accessories Continued Description Model or Part Number ...

Page 266: ...6 110 Keysight N5224A 25A Service Guide Replaceable Parts Replaceable Parts Listings 6 ...

Page 267: ... A table of removal and replacement procedures and the corresponding page number where they are located page 7 4 Removal and Replacement Procedures The actual procedures for removing and replacing the major assemblies in your analyzer The procedures occur in assembly reference designator numerical order See Table 7 1 on page 7 4 for specific procedures Post Repair Procedures A table for the proper...

Page 268: ... are removed Energy available at many points may if contacted result in personal injury The power cord is connected to internal capacitors that may remain live for 10 seconds after disconnecting the plug from its power supply assembly Wait at least 10 seconds after disconnecting the plug before removing the covers The detachable power cord is the instrument disconnecting device It disconnects the ...

Page 269: ...atic discharge ESD Perform the following procedures 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 To reduce the chance of electrostatic discharge follow all of the recommendations outlined in Electrostatic Discharge Protection on page 1 7 for...

Page 270: ...26 5 GHz source boards Doubler boards Frequency reference board Signal processing ADC module SPAM board page 7 14 A18 System motherboard page 7 17 A19 Midplane board page 7 20 A20 Power supply page 7 22 A21 CPU board page 7 24 A22 GPIB board page 7 26 A23 Test set motherboard page 7 28 A24 IF multiplexer board page 7 30 A25 Multiplier amplifier 26 5 HMA26 5 page 7 32 A26 Splitter page 7 34 A27 A28...

Page 271: ...or Port 2 source step attenuator page 7 45 A42 A43 A44 A45 Port 1 bias tee Port 3 bias tee Port 4 bias tee Port 2 bias tee page 7 47 A46 A47 A48 A49 Port 1 receiver step attenuator Port 3 receiver step attenuator Port 4 receiver step attenuator Port 2 receiver step attenuator page 7 45 A55 Solid State drive SSD page 7 49 Table 7 1 List of Procedures Continued Reference Designator Assembly Descript...

Page 272: ...ver toward the rear of the analyzer and remove it Removing the Inner Cover Refer to Figure 7 1 for this procedure 1 With a T 10 TORX driver remove the 24 pan head screws item 2 With a T 10 TORX driver remove the 9 flat head screws item 3 Lift off the cover Replacement Procedure 1 On the top side of the PNA carefully position the grey flex cables so they can t be pinched between the covers and the ...

Page 273: ...Keysight N5224A 25A Service Guide 7 7 Repair and Replacement Procedures Removing the Covers Figure 7 1 Outer and Inner Cover Removal ...

Page 274: ... 16 inch torque wrench remove all the semirigid jumpers item from the front panel if present 4 Remove screws item from the lower front panel There are two screws for 2 port models and four screws for 4 port models 5 With a T 20 TORX driver remove the 12 screws item from the sides of the frame 6 Slide the front panel over the front panel connectors 7 Disconnect the ribbon cable item from the A1 fro...

Page 275: ...Keysight N5224A 25A Service Guide 7 9 Repair and Replacement Procedures Removing and Replacing the Front Panel Assembly Figure 7 2 Front Panel Assembly Removal ...

Page 276: ...rd and unplug it from the A1 front panel interface board Removing the A1 Front Panel Interface Board and Keypad Assembly 1 Remove the round knob RPG from the front panel by gently pulling the knob forward 2 Remove the A2 USB board as outlined above 3 Disconnect the following cables from the A1 front panel interface board display cable item inverter board cable item touchscreen controller board cab...

Page 277: ...on Keypad 1 Disconnect the power switch cable item from the power switch board 2 Remove two screws item and remove the power switch board 3 The power button keypad can now be removed from the power switch board by gently pulling each of the rubber tabs through the PC board Figure 7 3 Front Panel Subassemblies Removal Removing the A3 Display Assembly and the Touchscreen 1 Disconnect the following c...

Page 278: ...ber boot on the old touch screen and then remove it and install it on the new one in the same orientation Figure 7 4 A3 Display Assembly and Touch Screen Removal 1 4 The display cable item can be removed by removing the three screws item that attach it to the LCD display hold down bracket item 5 The LCD display can be removed by disconnecting the LCD cable from the inverter board and then removing...

Page 279: ... and Other Front Panel Subassemblies Figure 7 5 A3 Display Assembly and Touch Screen Removal 2 Replacement Procedure 1 Reverse the order of the removal procedure 2 Perform the post repair adjustments verifications and performance tests that pertain to this removal procedure Refer to Table 7 2 on page 7 59 ...

Page 280: ...emirigid cables from the A4 A7 and A8 boards c On the top side of the analyzer remove two screws item one at each end of the board from the source board to be removed d Lift the two extractors item one at each end of the board Adjust the slack in the gray flexible cable to move it out of the way and lift the board out of the chassis 4 A7 A8 A12 A13 boards on the bottom side of the analyzer disconn...

Page 281: ... from the new board When replacing the A5 or A10 source board remove the semirigid cables attached to the bottom of the old board and attach them to the bottom of the new board Be sure to orient these cables the same as they were on the old board 2 Perform the post repair adjustments verifications and performance tests that pertain to this removal procedure Refer to Table 7 2 on page 7 59 The A4 A...

Page 282: ...7 16 Keysight N5224A 25A Service Guide Repair and Replacement Procedures Removing and Replacing the A4 A17 Boards 7 Figure 7 6 A4 A5 A7 A8 A10 A12 A13 A14 A15 A16 and A17 Boards Removal ...

Page 283: ...om the rear panel 8 Remove the rear panel 9 Remove the A22 GPIB board Refer to Removing and Replacing the A22 GPIB Board on page 7 26 10 Remove the A19 midplane board Refer to Removing and Replacing the A19 Midplane Board on page 7 20 11 Remove the A4 A17 boards Refer to Removing and Replacing the A4 A17 Boards on page 7 14 12 Remove the right side and left side fan brackets Disconnect the right f...

Page 284: ...ssis 19 Slide the A18 system motherboard toward the rear of the analyzer to release it from the 15 keyhole standoffs item on the chassis 20 Lift the A18 system motherboard out of the analyzer Replacement Procedure 1 Reverse the order of the removal procedure 2 Perform the post repair adjustments verifications and performance tests that pertain to this removal procedure Refer to Table 7 2 on page 7...

Page 285: ...Keysight N5224A 25A Service Guide 7 19 Repair and Replacement Procedures Removing and Replacing the A18 System Motherboard Figure 7 7 A18 System Motherboard Removal ...

Page 286: ...rs item to the upright position to disengage the A19 midplane board from the A18 system motherboard 7 Note the positions of the six rubber grommets item on the bottom three A19 midplane board alignment pins Remove these rubber grommets and retain them for reinstallation on the new A19 midplane board 8 Lift the A19 midplane board out of the analyzer Replacement Procedure 1 Reverse the order of the ...

Page 287: ...Keysight N5224A 25A Service Guide 7 21 Repair and Replacement Procedures Removing and Replacing the A19 Midplane Board Figure 7 8 A19 Midplane Board Removal ...

Page 288: ... 7 9 for this procedure 1 Disconnect the power cord 2 Remove the outer and inner covers Refer to Removing the Covers on page 7 6 3 Remove the three flat head screws item from the power supply bracket 4 Remove the seven pan head screws item from the power supply rear panel 5 Slide the A20 power supply assembly out the rear of the analyzer Replacement Procedure 1 Reverse the order of the removal pro...

Page 289: ...Keysight N5224A 25A Service Guide 7 23 Repair and Replacement Procedures Removing and Replacing the A20 Power Supply Assembly Figure 7 9 A20 Power Supply Assembly Removal ...

Page 290: ... the CPU assembly rear panel and two from the ejector handles 4 Grasp the two ejector handles and rotate them outward toward the sides of the analyzer as shown in the illustration This will disengage the A21 CPU board assembly from the A19 midplane board 5 Slide the A21 CPU board assembly out the rear of the analyzer 6 If the A21 CPU board assembly is being replaced you must first remove the A55 s...

Page 291: ...Keysight N5224A 25A Service Guide 7 25 Repair and Replacement Procedures Removing and Replacing the A21 CPU Board Assembly Figure 7 10 A21 CPU Board Assembly Removal ...

Page 292: ...s Refer to Removing the Covers on page 7 6 3 Remove the A20 power supply assembly Refer to Removing and Replacing the A20 Power Supply Assembly on page 7 22 4 Remove the A21 CPU board assembly Refer to Removing and Replacing the A21 CPU Board Assembly on page 7 24 5 Remove the rear panel Refer to Removing and Replacing the Rear Panel on page 7 51 6 Slide the A22 GPIB board out the rear of the anal...

Page 293: ...Keysight N5224A 25A Service Guide 7 27 Repair and Replacement Procedures Removing and Replacing the A22 GPIB Board Figure 7 11 A22 GPIB Board Removal ...

Page 294: ...uter cover Refer to Removing the Covers on page 7 6 3 Position the analyzer bottom side up 4 Disconnect ALL ribbon cables item and ALL wire harnesses item from the A23 test set motherboard 5 Remove connector hardware item from 11 rear panel BNC connectors 6 Remove 10 screws item from the A23 test set motherboard 7 Slide the A23 test set motherboard toward the front of the instrument until the rear...

Page 295: ...Keysight N5224A 25A Service Guide 7 29 Repair and Replacement Procedures Removing and Replacing the A23 Test Set Motherboard Figure 7 12 A23 Test Set Motherboard Removal ...

Page 296: ... ALL gray flexible RF cables item from the A24 IF multiplexer board 7 Remove connector hardware item from five rear panel RF connectors 8 Remove connector hardware item from the rear panel PULSE I O connector 9 Remove four screws item from the stabilizer bracket and remove the stabilizer bracket 10 Remove four screws item from the A24 IF multiplexer board 11 Slide the A24 IF multiplexer board towa...

Page 297: ...Keysight N5224A 25A Service Guide 7 31 Repair and Replacement Procedures Removing and Replacing the A24 IF Multiplexer Board Figure 7 13 A24 IF Multiplexer Board Removal ...

Page 298: ...r bottom side up 4 Disconnect the ribbon cable item from the A25 HMA26 5 assembly 5 Disconnect semirigid cables item from the A25 HMA26 5 It may be necessary to loosen the other end of the cables to allow them to be moved Do not over bend them 6 Remove four screws item that hold the A25 HMA26 5 to the chassis side panel Replacement Procedure 1 Reverse the order of the removal procedure Torque all ...

Page 299: ...Keysight N5224A 25A Service Guide 7 33 Repair and Replacement Procedures Removing and Replacing the A25 HMA26 5 Figure 7 14 A25 HMA26 5 Removal ...

Page 300: ...e analyzer bottom side up 4 Disconnect semirigid cables item from the A26 splitter It may be necessary to loosen the other end of the cables to allow them to be moved Do not overbend them 5 Remove two screws item from the A26 splitter and lift the splitter out of the analyzer Replacement Procedure 1 Reverse the order of the removal procedure Torque all RF cable connections to 10 in lbs 2 Perform t...

Page 301: ...Keysight N5224A 25A Service Guide 7 35 Repair and Replacement Procedures Removing and Replacing the A26 Splitter Figure 7 15 A26 Splitter Removal ...

Page 302: ...r 5 Disconnect the ribbon cables item from each of the mixer bricks 6 Remove two screws item from each end of the mixer brick bracket 7 Move the disconnected semirigid cables out of the way and lift the mixer brick mounting block out of the analyzer just enough to allow the gray flexible RF cables item to be disconnected It may be necessary to loosen the connector at the other end of some of the s...

Page 303: ...rom the old mixer brick to the new mixer brick in the same location Some 2 port models and some 4 port models have a 3 dB pad on the A27 mixer brick R1 connection and all 4 port models have a 3 dB pad on the A28 mixer brick R4 connection If appropriate be sure to move the pad s from the old mixer brick s to the new mixer brick s Torque all RF cable connections to 10 in lbs 2 Perform the post repai...

Page 304: ...move two screws item from the mounting bracket of the receiver coupler to be replaced 6 Move the disconnected semirigid cables out of the way and lift the receiver coupler mounting bracket with the receiver coupler attached out of the analyzer It may be necessary to loosen the connector at the other end of some of the semirigid cables to allow them to be moved enough Do not overbend them 7 Remove ...

Page 305: ... N5224A 25A Service Guide 7 39 Repair and Replacement Procedures Removing and Replacing the A29 A32 Receiver Couplers and Receiver Coupler Mounting Brackets Figure 7 17 A29 through A32 receiver couplers Removal ...

Page 306: ...necessary to loosen the other end of the cables to allow them to be moved Do not overbend them 6 Disconnect the wire harness item from the corresponding front panel LED board and place it out of the way 7 Remove the coupler nut item from each coupler to be removed 8 Move the disconnected semirigid cables out of the way and remove the coupler s from the analyzer It may be necessary to remove other ...

Page 307: ... 41 Repair and Replacement Procedures Removing and Replacing the A33 A36 Test Port Couplers 2 Perform the post repair adjustments verifications and performance tests that pertain to this removal procedure Refer to Table 7 2 on page 7 59 ...

Page 308: ...7 42 Keysight N5224A 25A Service Guide Repair and Replacement Procedures Removing and Replacing the A33 A36 Test Port Couplers 7 Figure 7 18 A33 through A36 Test Port Couplers Removal ...

Page 309: ... semirigid cables out of the way and lift the A37 reference mixer switch and mounting bracket out of the analyzer It may be necessary to loosen the other end of the cables to allow them to be moved Do not overbend them 7 Disconnect the wire harness cable item from the A37 reference mixer switch 8 Remove two screws item that attach the A37 reference mixer switch to its mounting bracket Replacement ...

Page 310: ...7 44 Keysight N5224A 25A Service Guide Repair and Replacement Procedures Removing and Replacing the A37 Reference Mixer Switch 7 Figure 7 19 A37 Reference Mixer Switch Removal ...

Page 311: ...ator bracket If so note the location and orientation of each for reinstallation later 6 Remove three screws item that secure A46 and A49 receiver attenuator brackets to the test set deck or remove two screws item that secure A47 and A48 receiver attenuator brackets or all source attenuator brackets to the test set deck 7 Move the disconnected semirigid cables out of the way and lift the attenuator...

Page 312: ... Keysight N5224A 25A Service Guide Repair and Replacement Procedures Removing and Replacing the A38 A41 Source Attenuators and the A46 A49 Receiver Attenuators 7 Figure 7 20 Source and Receiver Attenuators ...

Page 313: ... to be removed Make note of the location of the wire harness cable ground wire for reinstallation later 6 Disconnect the wire harness cable item from the A23 test set motherboard 7 Move the disconnected semirigid cables out of the way and remove the bias tee from the analyzer It may be necessary to loosen the other end of the cables to allow them to be moved Do not overbend them Replacement Proced...

Page 314: ...7 48 Keysight N5224A 25A Service Guide Repair and Replacement Procedures Removing and Replacing the A42 A45 Bias Tees 7 Figure 7 21 A42 through A45 Bias Tees Removal ...

Page 315: ...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 If installing an SSD for Windows 7 for more information on the N8983A SSD refer to the Windows 7 Operating System Upgrade Kit Installation Note available online at http literature cdn keysight com litweb pdf N8983 90001 p...

Page 316: ...lid State Drive SSD 7 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 The network analyzer must be powered up and operating ...

Page 317: ...g the Covers on page 7 6 3 Remove the A20 power supply assembly Refer to Removing and Replacing the A20 Power Supply Assembly on page 7 22 4 Remove the A21 CPU board assembly Refer to Removing and Replacing the A21 CPU Board Assembly on page 7 24 5 Remove the 50 ohm load s item 6 Remove the connector hardware item from each of the five multi pin connectors The hardware is not the same on each conn...

Page 318: ...7 52 Keysight N5224A 25A Service Guide Repair and Replacement Procedures Removing and Replacing the Rear Panel 7 Figure 7 23 Rear Panel Removal ...

Page 319: ...gure 7 18 for this procedure 1 Disconnect the power cord 2 Remove the test port couplers Refer to Removing and Replacing the A33 A36 Test Port Couplers on page 7 40 3 Remove two screws item from the LED board to be removed and remove the LED board from the analyzer Replacement Procedure 1 Reverse the order of the removal procedure 2 Perform the post repair adjustments verifications and performance...

Page 320: ...7 54 Keysight N5224A 25A Service Guide Repair and Replacement Procedures Removing and Replacing the Front Panel LED Boards 7 Figure 7 24 Front Panel LED Boards Removal ...

Page 321: ...r supply bracket Refer to Removing and Replacing the A20 Power Supply Assembly on page 7 22 5 Remove screws item five on the right side and seven on the left side that attach the fan brackets to the chassis 6 Remove three screws item on both sides that attach the rear panel to the fan bracket 7 Raise the fan bracket out of both sides in the analyzer just enough to access the fan cables Disconnect ...

Page 322: ... Repair and Replacement Procedures Removing and Replacing the Fans 7 2 Perform the post repair adjustments verifications and performance tests that pertain to this removal procedure Refer to Table 7 2 on page 7 59 Figure 7 25 B1 Fan Removal ...

Page 323: ...te Drive SSD on page 7 49 3 Remove 22 top cover attachment screws item 4 Remove the top cover from the A21 CPU board assembly 5 Remove the battery from the battery holder by lifting it at the open end of the holder and then sliding it from under the clip item 6 DO NOT THROW AWAY THE BATTERY COLLECT IT AS SMALL CHEMICAL WASTE Refer to Lithium Battery Disposal on page 1 10 for additional information...

Page 324: ...7 58 Keysight N5224A 25A Service Guide Repair and Replacement Procedures Removing and Replacing the Lithium Battery 7 Figure 7 26 Lithium Battery Removal ...

Page 325: ...nt Synth Src1 only Synthesizer Bandwidth Adjustmenta Source Adjustment IF Gain Adjustment Receiver Characterization Receiver Adjustment IF Response Adjustment Option 090 093 or 094 Only Source Power Accuracy Test Source Maximum Power Output Test Source Power Linearity Test The Operator s Check A5 26 5 GHz source board Source Adjustment IF Gain Adjustment Receiver Characterization Receiver Adjustme...

Page 326: ... Adjustment Option 090 093 or 094 Only Noise Floor Test Trace Noise Test A17 13 5 GHz source 2 synthesizer board EE Default Adjustment Synth Src2 only Synthesizer Bandwidth Adjustmenta Source Adjustment IF Gain Adjustment Receiver Characterization Receiver Adjustment IF Response Adjustment Option 090 093 or 094 Only Frequency Accuracy Test Source Power Accuracy Test Source Maximum Power Output Tes...

Page 327: ... Noise Floor Test Receiver Compression Test Dynamic Accuracy Test A26 splitter Source Adjustment IF Gain Adjustment Receiver Characterization Receiver Adjustment IF Response Adjustment Option 090 093 or 094 Only Noise Floor Test Receiver Compression Test Dynamic Accuracy Test A27 and A28 mixer bricks Source Adjustment IF Gain Adjustment Receiver Characterization Receiver Adjustment IF Response Adj...

Page 328: ...4 Only Source Maximum Power Output Test Calibration Coefficients Test A46 A49 receiver step attenuators Receiver Characterization Receiver Adjustment IF Response Adjustment Option 090 093 or 094 Only Noise Floor Test Receiver Compression Test Dynamic Accuracy Test Calibration Coefficients Test A55 solid state drive Restore previously saved receiver calibration datab or perform Receiver Adjustment ...

Page 329: ...ns that have been added to your analyzer repair lost or damaged option data install or change a serial number page 8 11 Firmware Upgrades How to check your analyzer s current firmware revision and where to locate firmware upgrades page 8 15 Operating System Recovery Where to find the information on recovering from a damaged operating system page 8 16 Correction Constants How to store correction co...

Page 330: ... Review the Principles of Connector Care on page 3 5 or to the calibration kit s user s and service guide Preventive Maintenance If you print or plot the error terms at set intervals weekly monthly and so forth you can compare current error terms to these records A stable system should generate repeatable error terms over long intervals for example six months Look for the following A long term tre...

Page 331: ...epresentation of signal flow through the measurement path The flowgraphs in Figure 8 1 Figure 8 2 Figure 8 3 and Figure 8 4 illustrate the error terms associated with measurement calibration for 1 port 2 port 3 port and 4 port configurations respectively Figure 8 1 Flowgraph of One Port Error Terms for Port 1 where E Error term Subscript D Directivity Always suspect calibration devices cables or i...

Page 332: ...erms are the same for a one port measurement on Port 2 S22 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 L Load Match T Transmission Tracking 2nd Subscript F forward measurement Ports 1 to Port 2 R reverse measurement Ports 2 to Port 1 ...

Page 333: ...rward Source Match and Reverse Load Match TRK Forward Reflection Tracking and Reverse Transmission Tracking For the case of a full 3 port calibration port 1 has three Match error terms S11 source match S12 load match S13 load match and three Tracking error terms S11 reflection tracking S12 transmission tracking S13 transmission tracking There are six isolation terms not shown ...

Page 334: ...g and Reverse Transmission Tracking For the case of a full 4 port calibration port 1 has four Match error terms S11 source match S12 load match S13 load match S14 load match and four Tracking error terms S11 reflection tracking S12 transmission tracking S13 transmission tracking S12 transmission tracking There are eight isolation crosstalk terms not shown Accessing Error Terms Error terms can be a...

Page 335: ...re the displayed measurement trace to previously measured data or to the uncorrected performance specifications listed in Table 8 1 on page 8 8 6 Print numerical data or print a plot of the measurement results 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 For more information on GPIB ...

Page 336: ...rror Term Dataa Parameter All options all ports Frequency Range 10 MHz to 50 MHz 50 MHz to 3 2 GHz 3 2 GHz to 10 GHz 10 GHz to 16 GHz 16 GHz to 24 GHz 24 GHz to 26 5 GHz Directivity 16 dBm 24 dBm 23 dBm 16 dBm 16 dBm 16 dBm Source Match 11 dBm 18 dBm 14 dBm 12 dBm 10 dBm 8 dBm Load Match 11 dBm 17 dBm 13 dBm 10 dBm 9 dBm 8 dBm 10 MHz to 50 MHz 50 MHz to 100 MHz 100 MHz to 500 MHz 500 MHz to 3 2 GH...

Page 337: ...SF and ESR are the forward and reverse uncorrected source match terms of the driven port They are obtained by measuring the reflection S11 S22 of an open and a short that are connected directly to the ports Source match is a measure of the match of the coupler as well as the match between all components from the source to the output port The measurements most affected by source match errors are re...

Page 338: ...cted 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 S21 S12 with loads attached to both ports during the measurement calibration isolation errors affect transmission measurements primarily where the measured signal level is very low The measurements most affected by i...

Page 339: ...S CERTIFICATE to obtain license key s for the option s listed on the certificate See the important note below System Service Option Enable When upgrading from one model number to another a new option entitlement certificate will be issued When this certificate is redeemed for a license key the automated system will ask for the instrument s Host ID Be sure to use the new Host ID that is associated ...

Page 340: ...n 1 Start the option enable utility Refer to Accessing the Option Enable Utility on page 8 11 2 Click the arrow in the Select Desired Option box A list of available options similar to the list below will appear 020 Add IF inputs 021 Pulse Modulator on Source 1 022 Pulse Modulator on Source 2 025 4 Receiver Pulse Generator 086 Gain Compression Application 087 IMD Measurements 219 Src Rcvr Atten Bia...

Page 341: ...a is written from the gen lic file into the EEPROM If the solid state drive is replaced a new gen lic file is automatically created when the Network Analyzer application starts by retrieving the data from the EEPROM Recovery of Data if Option or Model Numbers are Incorrect If the analyzer option or model numbers are not listed correctly on the analyzer display in either the Option Enable Dialog Bo...

Page 342: ...no serial number has previously been entered the word NONE will be displayed 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 CLEAR The correct serial number can then be entered Use extreme care when entering the serial ...

Page 343: ...ng from the Internet 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 Press UTILITY then then AgileUpdate compares the firmware revision currently installed in your ne...

Page 344: ...ive 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 The URL for the Keysight PNA Series Service Support Home Page is http na support keysight com pna The URL for the Hard Drive Recovery page is http na support keysight com pna hdrecovery html ...

Page 345: ...ate leveled source signals and receive clean test signals Storing Correction Constants After performing any adjustment listed on page 3 41 in this manual store the correction constants to a backup file on the analyzer solid state drive by performing these steps Navigate to the EEPROM Backup Utility located at C Program Files Keysight Network Analyzer Service eebackup exe Run the program Click Back...

Page 346: ...8 18 Keysight N5224A 25A Service Guide General Purpose Maintenance Procedures Correction Constants 8 ...

Page 347: ...ted 7 16 procedure 7 14 troubleshooting 4 38 A12 doubler illustrated 6 18 part number 6 16 removal and replacement illustrated 7 16 procedure 7 14 A13 doubler illustrated 6 18 part number 6 16 removal and replacement illustrated 7 16 procedure 7 14 A14 frequency reference board illustrated 6 18 operation 5 12 part number 6 16 removal and replacement illustrated 7 16 troubleshooting 4 35 A15 13 5 G...

Page 348: ...2 part number 6 54 6 61 6 68 6 75 6 84 removal and replacement illustrated 7 37 procedure 7 36 troubleshooting 4 44 A29 test port 1 receiver coupler illustrated 6 23 6 29 6 35 6 41 6 48 6 55 6 62 6 69 6 76 6 85 part number 6 22 6 28 6 34 6 47 6 54 6 61 6 68 6 75 6 84 removal and replacement illustrated 7 39 A3 display assembly operation 5 29 part number 6 12 removal and replacement illustrated 7 1...

Page 349: ...st port 3 bias tee illustrated 6 85 part number 6 84 removal and replacement illustrated 7 46 7 48 procedure 7 45 7 47 troubleshooting 4 43 A44 test port 4 bias tee illustrated 6 85 part number 6 84 removal and replacement illustrated 7 46 7 48 procedure 7 45 7 47 troubleshooting 4 43 A45 test port 2 bias tee illustrated 6 48 6 85 part number 6 47 6 84 removal and replacement illustrated 7 46 7 48...

Page 350: ...3 31 internal replaceable parts illustrated 6 104 part numbers 6 103 miscellaneous replaceable parts part numbers 6 106 operation 13 5 GHz synthesizer boards 5 10 A7 A8 A12 and A13 doublers 5 11 configurable test set 5 17 CPU board 5 30 data acquisition subgroup 5 30 digital control group 5 27 digital processor group 5 27 display assembly 5 29 front panel display board 5 29 front panel subgroup 5 ...

Page 351: ...part numbers 6 47 replaceable RF cables illustrated 6 51 part numbers 6 49 replaceable ribbon cables wire harnesses illustrated 6 53 part numbers 6 52 bottom assembly Option 400 replaceable parts illustrated 6 55 part numbers 6 54 replaceable RF cables illustrated 6 58 part numbers 6 56 replaceable ribbon cables wire harnesses illustrated 6 60 part numbers 6 59 bottom assembly Option 401 replaceab...

Page 352: ...orming 3 14 return loss 3 14 COM 8 7 compression test receiver 3 35 configurable test set operation 5 17 configuration configurable test set 5 18 high dynamic range measurement 5 18 normal configuration measurement 5 18 connectors care of 3 5 front panel 5 29 rear panel 5 13 5 24 5 31 Display 5 31 EXT 10 MHz REF IN 5 13 EXT 10 MHz REF OUT 5 13 GPIB 5 31 HANDLER I O 5 13 5 15 PULSE I O 5 24 PWR I O...

Page 353: ...8 2 descriptions 8 8 directivity 8 9 flowgraph of one port 8 3 flowgraph of two port 8 4 8 5 8 6 identifying using flowgraphs 8 3 isolation 8 10 load match 8 9 magnitude affected by 8 2 monitoring over time 8 2 shape affected by 8 2 source match 8 9 typical data 8 8 using as diagnostic tool 8 2 using to aid troubleshooting 8 2 worse than typical values 8 8 ESD protection 1 7 3 4 4 3 4 4 7 3 8 3 su...

Page 354: ...r 6 10 operation 5 29 power switch board parts list 6 12 power switch overlay illustrated 6 11 part number 6 10 subassemblies removal and replacement illustrated 7 11 procedures 7 10 subgroup 5 27 touch screen parts list 6 12 trim strip filler illustrated 6 11 part number 6 10 troubleshooting 4 16 USB board part number 6 12 USB controller board part number 6 12 functional groups 5 3 fuses 6 107 G ...

Page 355: ...connector rear panel 5 31 cross over cable 4 26 IP address 4 23 ping command 4 23 ping to and from 4 22 subnet mask 4 23 testing between analyzers 4 25 troubleshooting 4 22 LCD assembly parts list 6 12 LED board front panel removal 7 53 illustrated 6 23 6 29 6 35 6 41 6 48 6 55 6 62 6 69 6 76 6 85 part number 6 22 6 28 6 34 6 47 6 54 6 61 6 68 6 75 6 84 linearity source power test 3 33 test port o...

Page 356: ...M board analog 5 23 SPAM board digital 5 30 system motherboard 5 29 test port couplers 5 18 test set motherboard 5 13 operator s check 3 12 accessories used in 3 12 description of 3 12 dialog box 3 13 failure of 3 14 performing 3 12 option data recovering 8 13 repairing 8 13 enable utility 8 11 accessing 8 11 dialog box 8 11 enabling and removing 8 12 entitlement certificate 8 11 hardware 8 12 ser...

Page 357: ...preventive maintenance effect on error terms 8 2 processing subgroup operation 5 30 protection against ESD 1 7 3 4 4 3 4 4 7 3 8 3 PULSE I O adapter N1966A 2 3 connector pin assignments 5 24 PWR I O connector pin assignments 5 16 R R receiver troubleshooting 4 29 R trace troubleshooting 4 29 rack mount kits part numbers 6 108 RAM main operation 5 31 rear panel connectors Display 5 31 EXT 10 MHz RE...

Page 358: ... Removal and Replacement Procedures response IF adjustment 3 46 return loss check failure of 3 15 test port cables 3 14 RF cables See cables RF ribbon cables See cables ribbon rotary pulse generator RPG illustrated 6 11 part number 6 10 test 4 18 troubleshooting 4 16 S safety considerations 1 3 earth ground 1 3 symbols 1 2 SCPI 8 7 screws in external analyzer illustrated 6 106 part numbers 6 105 i...

Page 359: ...ent 3 42 system adjustments 3 1 3 41 EE default 3 46 frequency at 10 MHz 3 41 getting ready 3 4 IF gain 3 43 IF response 3 46 receiver calibration 3 44 receiver characterization 3 43 source calibration 3 42 synthesizer bandwidth 3 42 checks 3 1 getting ready 3 4 operating recovery 8 16 specifications 3 7 verification 3 1 3 8 3 21 dialog box 3 25 example of results 3 28 3 30 failure flowchart 3 27 ...

Page 360: ... strip filler front panel illustrated 6 11 part number 6 10 troubleshooting A1 front panel interface board 4 14 4 16 A10 26 5 GHz source 2 board 4 38 A14 frequency reference board 4 35 A15 13 5 GHz LO synthesizer board 4 36 A16 SPAM board 4 46 A17 13 5 GHz source 2 synthesizer board 4 37 A20 power supply assembly 4 9 A21 CPU board 4 21 A24 IF multiplexer board 4 46 A25 HMA26 5 4 36 A26 splitter 4 ...

Page 361: ...em troubleshoot 4 22 using error terms 8 2 where to begin 4 6 U uncertainty measurement 3 21 upgrade analyzer 2 3 firmware 8 15 downloading from the internet 8 15 how to order 2 3 kits order numbers 6 108 USB accessories part numbers 6 108 board part number 6 12 removal 7 11 removal procedure 7 10 troubleshooting 4 16 port rear panel connector 5 31 rear panel troubleshooting 4 21 utility option en...

Page 362: ...This information is subject to change without notice Keysight Technologies 2011 2017 Edition 1 December 2017 N5225 90001 www keysight com ...

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