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Keysight N5224B, Service Manual

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Contents

Keysight N5224B/25B Service Guide 

 

7

Chapter Four at-a-Glance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-2
Conventions Used for Hardkeys, Softkeys, and Menu Items. . . . . . . . . . . . . . . . . . . . . .  4-3

Operating the Analyzer With Covers Removed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-5
Protect Against Electrostatic Discharge (ESD)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-5
Assembly Replacement Sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-6
Getting Started with Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-7

Check the Basics  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-7
Troubleshooting Organization  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-7

Power Up Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-9

Power Supply Check  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-10
Troubleshooting LCD Display Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-15

Front Panel Troubleshooting  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-17

Front Panel Keypad and RPG Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-17
A3 Display Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-20
Checking the A2 USB Board  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-21
A1 Front Panel Interface Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-22

Rear Panel Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-24

Checking the USB Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-24
Checking the CONTROLLER Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-24
LAN Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-25

Measurement System Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-31

Before you begin—consider: Where do you see a problem? . . . . . . . . . . . . . . . . . . . . .  4-31
Verifying the A, B, C, D, and R Traces (Standard S-Parameter Mode) . . . . . . . . . . . . .  4-32
Where to Begin Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-34
Checking the Source Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-37
Checking the Signal Separation Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-47
Checking the Receiver Group. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-52

Instrument Simplified Block Diagrams – LFE  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-56

2-Port N5290A System Block Diagram (201 and 205) . . . . . . . . . . . . . . . . . . . . . . . . .  4-56
2-Port N5290A System Block Diagram (202 and 205) . . . . . . . . . . . . . . . . . . . . . . . . .  4-57
4-Port N5290A System Block Diagram (401) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-58

 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-61

Instrument Block Diagrams – 2-Port (Sheet 1), Non-LFE and Non-DDS (Version 6 

Synthesizers). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4-62

Microwave PNA, N5224/5B – 2-Port (Version 6 Synthesizers), Non-LFE and Non-DDS  . . 

4-62

Instrument Block Diagrams – 2-Port (Sheet 2), LFE and Non-DDS (Version 6 Synthesizers) . . 

4-64

Microwave PNA, N5224/5B – 2-Port (LFE & Version 6 Synthesizers), LFE and Non-DDS  .

4-64

Instrument Block Diagrams – 2-Port (Sheet 3), Non-LFE and DDS (Version 7 Synthesizer 

Summary of Contents for N5224B

Page 1: ...e N5224 5B 2 Port and 4 Port PNA Microwave Network Analyzers Service Guide N5224 5B Series 900 Hz 10 MHz 43 5 GHz 900 Hz 10 MHz 50 GHz This is the Service Guide for the N5224 5B Series Microwave Netwo...

Page 2: ...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...

Page 3: ...3...

Page 4: ...4...

Page 5: ...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...

Page 6: ...ver Compression Test 3 35 Noise State Calibration Coefficients 3 37 Noise Floor Test 3 37 Calibration Coefficients Test 3 38 Dynamic Accuracy Test 3 39 Dynamic Accuracy at Low Frequency Available with...

Page 7: ...g 4 25 Measurement System Troubleshooting 4 31 Before you begin consider Where do you see a problem 4 31 Verifying the A B C D and R Traces Standard S Parameter Mode 4 32 Where to Begin Troubleshootin...

Page 8: ...Port Version 7 Synthesizer Assembly Non LFE and DDS 4 74 Instrument Block Diagrams 4 Port Sheet 8 LFE and DDS Version 7 Synthesizer Assemblies 4 76 Microwave PNA N5224 5B 4 Port LFE Version 7 Synthesi...

Page 9: ...bly Replacement Sequence 6 3 Rebuilt Exchange Assemblies 6 4 Replaceable Parts Listings 6 6 Front Panel Assembly Front Side All Options 6 11 Front Panel Assembly Back Side All Options 6 14 Top Assembl...

Page 10: ...y the Model Version of HMA26 5 Installed 7 40 Removing and Replacing the A26 Splitter 7 41 Removing and Replacing the A27 and A28 Mixer Bricks 7 43 Removing and Replacing the A29 A32 Receiver Couplers...

Page 11: ...ing Error Terms 8 92 Error Term Data 8 94 Keysight License Manager 8 97 Accessing the Keysight License Manager 8 97 Software Entitlement Certificate 8 97 Enabling or Removing Options 8 98 Repairing an...

Page 12: ...12 Keysight N5224B 25B Service Guide Contents...

Page 13: ...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 po...

Page 14: ...ard 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...

Page 15: ...cause product damage If this product is 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 protecti...

Page 16: ...ry 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 remov...

Page 17: ...able 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 instrum...

Page 18: ...1 6 Keysight N5224B 25B Service Guide Safety and Regulatory Information General Safety Considerations 1 Figure 1 1 Location of Calibration Stickers on PNA...

Page 19: ...ways 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 ma...

Page 20: ...1 8 Keysight N5224B 25B Service Guide Safety and Regulatory Information Electrostatic Discharge Protection 1 Figure 1 2 ESD Protection Setup...

Page 21: ...ndby position of the power line switch This symbol marks the ON position of the power line switch This symbol marks the OFF position of the power line switch This symbol indicates that the input power...

Page 22: ...ct The CSA mark is a registered trademark of the CSA International Two person lift required Canada EMC label Interference Causing Equipment Standard for industrial scientific and medical ISM equipment...

Page 23: ...s mark indicates product has been designed to meet the requirements of IP x y where x is the solid particle protection and y is the liquid ingress protection Samples of this product have been type tes...

Page 24: ...o Contacting Keysight on page 2 7 for assistance For instructions on removing and replacing the battery on the A21 CPU board assembly refer to Removing and Replacing the Lithium Battery on page 7 76 O...

Page 25: ...rades 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 Equipm...

Page 26: ...intenance 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...

Page 27: ...n Guide available online at https www keysight com us en assets 7018 05185 configuration guides 5992 1465 pdf 5992 1465EN Pulse I O Adapter N1966A An adapter for connecting between the analyzer s rear...

Page 28: ...equency 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...

Page 29: ...0007c P A T 2 4 mm f to type N m 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...

Page 30: ...t panel and most rear panel connector hex nuts N A N A R 20 mm 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 ant...

Page 31: ...ve years R1282A Return to Keysight Calibration Plan The analyzer is delivered with a one year calibration certificate Options are available to have Keysight Technologies provide three or five year cal...

Page 32: ...rable packaging and antistatic materials may result in non warranted damage Contact Keysight for instructions on where to ship your analyzer In any correspondence or telephone conversation refer to th...

Page 33: ...he 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 tab whose label is determine...

Page 34: ...ing 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 verific...

Page 35: ...e Adjustment IF Gain Adjustment Receiver Characterization Receiver Adjustment EE Default Adjustment IF Response Adjustment Available Only with Option S93093 4A and or S93900 1 2 4 5 7A Installed LFE R...

Page 36: ...rature 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...

Page 37: ...connectors with alcohol shall only be done with the instrument power cord removed and in a well ventilated area Allow all residual alcohol moisture to evaporate and the fumes to dissipate prior to ene...

Page 38: ...r tighten preliminary connection Turn only the connector nut Twist or screw any connection Use a torque wrench for final connection Tighten past torque wrench break point a Cleaning connectors with al...

Page 39: ...ment specifications System Specifications System specifications specify warranted performance of the measurement system when making error corrected measurements using the same calibration kit and test...

Page 40: ...device data provided with the verification kit has a traceable path to NIST The total measurement uncertainty limits for the performance verification are the sum of the factory measurement uncertainti...

Page 41: ...ecifications 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 stan...

Page 42: ...ing 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 verific...

Page 43: ...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 con...

Page 44: ...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 Perfo...

Page 45: ...em 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 P...

Page 46: ...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 ne...

Page 47: ...LUS 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 yo...

Page 48: ...ower 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...

Page 49: ...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 cl...

Page 50: ...isplay 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 frequenc...

Page 51: ...er 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...

Page 52: ...me 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 se...

Page 53: ...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...

Page 54: ...n 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 establ...

Page 55: ...e 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...

Page 56: ...s 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 correctl...

Page 57: ...ter ensure 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 min...

Page 58: ...er 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...

Page 59: ...e 8 92 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 verif...

Page 60: ...ts 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 Examp...

Page 61: ...m 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 a...

Page 62: ...3 30 Keysight N5224B 25B Service Guide Tests and Adjustments System Verification 3 Figure 3 13 Example of Printed Graphical Verification Results...

Page 63: ...Test Frequency Accuracy Test Trace Noise Test Receiver Compression Test Noise Floor Test Calibration Coefficients Test Dynamic Accuracy Test Dynamic Accuracy at Low Frequency Available with LFE Option...

Page 64: ...7 Source Maximum Power Output Test Function of the Test To confirm the maximum source output power of your network analyzer over its full frequency range Specification Tested Test Port Output Maximum...

Page 65: ...ort analyzers The receiver linearity is the standard against which the source linearity is checked 1 The analyzer is Preset 2 The analyzer is set up for a CW transmission measurement on the test port...

Page 66: ...racy is specified as the ratio parts per million ppm so this ratio is unaffected by the signal doubling Therefore only the frequency accuracy of the synthesizer board needs to be tested 1 The analyzer...

Page 67: ...range The analyzer s trace statistics function is used to calculate the standard deviation of both the magnitude trace and the phase trace 5 These standard deviation values are reported as the analyze...

Page 68: ...set input port A test cable is connected to 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 r...

Page 69: ...zer test port as part of the noise floor measurement on another test port Port 2 is the source port when measuring the noise floor of Port 1 Port 1 is the source port when measuring the noise floor of...

Page 70: ...emoving and Replacing the A27 and A28 Mixer Bricks on page 7 43 If the analyzer still fails this test replace the A12 SPAM board and then repeat this test Refer to Removing and Replacing the A4 A17 Bo...

Page 71: ...est This description applies to all N522xb N5231B 32B 34B 35B 39B and N5247B instruments Function of the Test To measure the relative power linearity of the analyzer s receivers Specification Tested T...

Page 72: ...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 t...

Page 73: ...tion 205 220 420 425 on page 3 43 and to Removing and Replacing the A70 or A75 Low Frequency Extension LFE Board on page 7 59 Due to the complexity of the PNA family of analyzers the following notes a...

Page 74: ...ension LFE Board on page 7 59 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 th...

Page 75: ...t probe to the port 1 bias input BIAS 1 IN on the rear panel 3 Verify the DVM measures 10 4 Repeat these steps for each of the other test ports 1 Your model PNA may not have all of the LFE Options lis...

Page 76: ...hese adjustments are described on the following pages Touchscreen Adjustment and Verification The touchscreen adjustment calibration is used to correct the touchscreen accuracy when you replace your f...

Page 77: ...equency 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 R...

Page 78: ...hen 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...

Page 79: ...orrect 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 t...

Page 80: ...er 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 i...

Page 81: ...ment 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 Fig...

Page 82: ...w the instructions and prompts as they are displayed IF Response Adjustment Available Only with Option S93093 4A and or S93900 1 2 4 5 7A Installed The IF Response adjustment is required when upgradin...

Page 83: ...when upgrading to Option 205 or 425 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 LFE R...

Page 84: ...3 52 Keysight N5224B 25B Service Guide Tests and Adjustments Adjustments 3...

Page 85: ...ion 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 a...

Page 86: ...curring 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 17 Re...

Page 87: ...Port Sheet 4 LFE and DDS Version 7 Synthesizer Assemblies on page 68 Instrument Block Diagrams 4 Port Sheet 5 Non LFE and Non DDS Version 6 Synthesizers on page 70 Instrument Block Diagrams 4 Port She...

Page 88: ...25B Service Guide Troubleshooting Information in This Chapter 4 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...

Page 89: ...t electrostatic discharge can seriously damage your analyzer resulting in costly repair Do not operate the analyzer with the outer cover removed for more than 30 minutes as this could cause the analyz...

Page 90: ...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 Repl...

Page 91: ...Is the Windows operating system running If not refer to Operating System Recovery on page 8 100 for instructions 4 If other equipment cables and connectors are being used with the instrument make sur...

Page 92: ...ubleshooting Getting Started with Troubleshooting 4 Figure 4 1 Troubleshooting Organization Flowchart Go to Power Up Troubleshooting Go to Front Panel Troubleshooting Go to Rear Panel Troubleshooting...

Page 93: ...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 Troub...

Page 94: ...oltage is missing 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...

Page 95: ...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 followe...

Page 96: ...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 descr...

Page 97: ...nthesizer board refer to Removing and Replacing the A4 A17 Boards on page 7 19 8 Remove the A17 13 5 GHz synthesizer board refer to Removing and Replacing the A4 A17 Boards on page 7 19 9 Remove the A...

Page 98: ...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 22 If only one or...

Page 99: ...uspect a defective A18 system motherboard Refer to Removing and Replacing the A18 System Motherboard on page 7 22 Troubleshooting LCD Display Problems This procedure is intended to isolate the faulty...

Page 100: ...obable cause is the A21 CPU board Refer to Removing and Replacing the A21 CPU Board Assembly on page 7 29 3 If the external VGA monitor displays the correct information verify that the front panel int...

Page 101: ...roubleshooting on page 4 9 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 20 Checking the A2 USB...

Page 102: ...pad is working If some of the keys are not working suspect a faulty keypad To replace the keypad refer to Removing the A1 Front Panel Interface Board and Keypad Assembly on page 7 11 If none of the ke...

Page 103: ...r 171 T p 242 k m 232 Display 238 Navigationa Keys Keypad Code 7 182 0 206 Setup 241 Knob CW 101 8 183 decimal point 207 RESPONSE Keys Keypad Code Know CCW 102 9 176 201 Meas 179 Click Rotary Knob pre...

Page 104: ...G board or the A1 front panel interface board To replace the RPG board refer to Removing the RPG Assembly on page 7 11 To replace the A1 front panel interface board refer to Removing the A1 Front Pane...

Page 105: ...anty of the total pixels have a constant blue green red or black appearance that will not change Three or more consecutive pixels and or any two faulty pixels within 15 mm of each other have a constan...

Page 106: ...m the keypad to the A17 CPU board It routes display signals from the A17 CPU board to the A3 display assembly Checking the Speaker If no audio is heard Verify that the volume is set correctly and the...

Page 107: ...Keysight N5224B 25B Service Guide 4 23 Troubleshooting Front Panel Troubleshooting Checking the Display To verify the display functionality refer to A3 Display Test on page 4 20...

Page 108: ...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 verif...

Page 109: ...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...

Page 110: ...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 avai...

Page 111: ...eply 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 tr...

Page 112: ...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...

Page 113: ...m 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 t...

Page 114: ...4 30 Keysight N5224B 25B Service Guide Troubleshooting Rear Panel Troubleshooting 4 Figure 4 6 Construction of a Crossover Cable...

Page 115: ...te 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 88 This w...

Page 116: ...d Location N5224 5A B PNA and N5244 5A B PNA XInstruments press UTILITY then then then Refer to Figure 4 7 If the information is incorrect for any of the PC boards contact Keysight Technologies Refer...

Page 117: ...ayed in four separate data windows as shown in Figure 4 8 Identifying discrepancies of the traces in these windows can help you to isolate the faulty assembly Figure 4 8 Typical 4 Receiver Display for...

Page 118: ...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 t...

Page 119: ...IF multiplexer board A23 test set motherboard Use the list on the following pages to help you determine in which analyzer functional group to begin troubleshooting This is by no means an exhaustive l...

Page 120: ...directories and verify the presence of the following file C WINNT system32 drivers spampnp sys 3 If you have verified that the DSP driver is present and enabled but all traces are still missing in all...

Page 121: ...uts across 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 Equipment Us...

Page 122: ...low or high on all test ports the problem is LO signal related Continue with Checking the A14 50 MHz Reference Outputs If the power level is low or high on only one of the test ports the problem is ei...

Page 123: ...To access this log file on the PNA navigate to E log PowerOnTest Verify that hidden files is selected A failure indication similar to FAIL Slug S N not found indicates the DDS assembly is faulty for a...

Page 124: ...4 40 Keysight N5224B 25B Service Guide Troubleshooting Measurement System Troubleshooting 4 Figure 4 10 Example of Power On Self Test Error...

Page 125: ...mber Prefixes 6021 on page 6 19 Locate the flexible cable W51 at the A15 LO synthesizer board 2 Disconnect W51 from J1207 3 Connect the spectrum analyzer to J1207 4 Refer to Note on page 4 31 Set the...

Page 126: ...a legacy HMA26 5 or W80 2 port models with a legacy HMA26 5 and for all models with a new HMA26 5 at the A25 HMA26 5 2 Disconnect W52 4 port models with a legacy HMA26 5 or W80 2 port models with a l...

Page 127: ...hecking with Checking the Receiver Group on page 4 52 for 4 port models with a legacy HMA26 5 continue checking with Checking the A26 Splitter Output Verify the Model Version of HMA26 5 Installed The...

Page 128: ...nt For analyzers with DSP version 5 0 an 807 44 MHz signal should be present 5 If the observed problem was frequency banded rather than broadband related set the analyzer frequency to the center of th...

Page 129: ...ing 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 s...

Page 130: ...al Number Prefixes 6021 on page 6 19 Locate cable W11 on the A7 doubler board cable W17 on the A8 doubler board cable W13 on the A12 doubler board and cable W15 on the A13 doubler board A12 and A13 ar...

Page 131: ...to 900 Hz Figure 4 13 LFE Block Diagram Single Port Configuration Shown Other Ports are Similar Checking the Signal Separation Group Before checking the signal separation group assemblies you must op...

Page 132: ...eter user s guide for instructions on setting the calibration factor 2 If the Receiver Display Figure 4 8 or Figure 4 9 is not on the analyzer screen perform the following Press UTILITY then then then...

Page 133: ...r to the block diagrams at the end of this chapter and to any of the following that are appropriate 2 Port Configuration Option 200 S N Prefix 6021 on page 6 31 Bottom RF Cables Standard 2 Port Config...

Page 134: ...ath from the output of the source board to the output port Set the network analyzer for an S11 S22 S33 or S44 measurement for Port 1 2 3 or 4 respectively with a CW frequency of 800 MHz Perform the fo...

Page 135: ...and Replacing the A33 A36 Test Port Couplers on page 7 48 Checking the A38 A39 A40 and A41 60 dB Source Step Attenuators 1 Locate the appropriate semirigid cable at the output of the source step atte...

Page 136: ...Bottom RF Cables 4 Port Option 405 S N Prefix 6021 on page 6 156 4 Port Configuration Option 419 S N Prefix 6021 on page 6 180 Bottom RF Cables 4 Port Option 419 Ports 1 and 2 S N Prefix 6021 on page...

Page 137: ...er R1 W62 of A27 Receiver R2 W63 of A27 Receiver B W64 of A27 Receiver C W68 of A28 Receiver R3 W67 of A28 Receiver R4 W66 of A28 Receiver D W65 of A28 2 Disconnect the flexible cable at the suspect r...

Page 138: ...EF 1 SOURCE OUT connector 2 If the measured signal is present replace the A27 mixer brick Refer to Removing and Replacing the A27 and A28 Mixer Bricks on page 7 43 3 If the measured signal is not pres...

Page 139: ...opriate flexible RF cable from the output receiver to be tested on the A24 IF multiplexer board 3 Connect the spectrum analyzer to the open connector 4 Refer to Note on page 4 31 The measured signal o...

Page 140: ...Diagrams LFE 4 Instrument Simplified Block Diagrams LFE1 2 Port N5290A System Block Diagram 201 and 205 Figure 4 14 System Block Diagram Legend Figure 4 15 2 Port N5290A System Simplified Block Diagra...

Page 141: ...ht N5224B 25B Service Guide 4 57 Troubleshooting Instrument Simplified Block Diagrams LFE 2 Port N5290A System Block Diagram 202 and 205 Figure 4 16 2 Port N5290A System Simplified Block Diagram 202 a...

Page 142: ...4 58 Keysight N5224B 25B Service Guide Troubleshooting Instrument Simplified Block Diagrams LFE 4 4 Port N5290A System Block Diagram 401 Figure 4 17 4 Port N5290A System Simplified Block Diagram 401...

Page 143: ...Keysight N5224B 25B Service Guide 4 59 Troubleshooting Instrument Simplified Block Diagrams LFE Figure 4 18 4 Port N5290A System Simplified Block Diagram 402...

Page 144: ...4 60 Keysight N5224B 25B Service Guide Troubleshooting Instrument Simplified Block Diagrams LFE 4 Figure 4 19 4 Port N5290A System Simplified Block Diagram 403...

Page 145: ...Keysight N5224B 25B Service Guide 4 61 Troubleshooting This page intentionally left blank...

Page 146: ...oting Instrument Block Diagrams 2 Port Sheet 1 Non LFE and Non DDS Version 6 Synthesizers 4 Instrument Block Diagrams 2 Port Sheet 1 Non LFE and Non DDS Version 6 Synthesizers Microwave PNA N5224 5B 2...

Page 147: ...50 GHz Pulse Modulators 19 50 GHz P3 P1 P4 P5 P6 26 ALC Modulator 9 J401 J500 3 2 19 GHz 19 26 5 GHz B36 37 B38 B32 35 P2 B39 48 20 35 GHz 13 5 19 GHz 40 50 GHz 32 40 GHz 24 32 GHz 19 24 GHz X2 20 GHz...

Page 148: ...eshooting Instrument Block Diagrams 2 Port Sheet 2 LFE and Non DDS Version 6 Synthesizers 4 Instrument Block Diagrams 2 Port Sheet 2 LFE and Non DDS Version 6 Synthesizers Microwave PNA N5224 5B 2 Por...

Page 149: ...ulators 19 50 GHz P3 P1 P4 P5 P6 28 ALC Modulator 9 J401 J500 19 26 5 GHz B36 37 B38 B32 35 P2 B39 48 20 35 GHz 13 5 19 GHz 40 50 GHz 32 40 GHz 24 32 GHz 19 24 GHz X2 20 GHz 13 5 19 5 GHz Pulse Modula...

Page 150: ...strument Block Diagrams 2 Port Sheet 3 Non LFE and DDS Version 7 Synthesizer Assemblies 4 Instrument Block Diagrams 2 Port Sheet 3 Non LFE and DDS Version 7 Synthesizer Assemblies Microwave PNA N5224...

Page 151: ...P204 LFE IF B P4 LFE IF A 70 0 MHz A27 MIXER BRICK 1 A A R1 R1 R2 R2 B B 70 0 MHz 70 0 MHz 70 0 MHz I L R FROM A23 I L R I L R I L R IF 7 438 MHz for CW Freq 53 MHz IF 0 826 MHz for CW Freq 53 MHz W61...

Page 152: ...g Instrument Block Diagrams 2 Port Sheet 4 LFE and DDS Version 7 Synthesizer Assemblies 4 Instrument Block Diagrams 2 Port Sheet 4 LFE and DDS Version 7 Synthesizer Assemblies Microwave PNA N5224 5B 2...

Page 153: ...N 220 W82 W19 A38 STEP ATTEN 0 50 dB W81 W181 W182 A71 BIAS COMBINER DC BIAS 1 LFE RF PORT 1 W187 W188 A74 BIAS COMBINER DC BIAS 2 LFE RF PORT 2 Including Options 205 Configurable Test Set and LFE 220...

Page 154: ...oting Instrument Block Diagrams 4 Port Sheet 5 Non LFE and Non DDS Version 6 Synthesizers 4 Instrument Block Diagrams 4 Port Sheet 5 Non LFE and Non DDS Version 6 Synthesizers Microwave PNA N5224 5B 4...

Page 155: ...24 GHz X2 20 GHz 13 5 19 5 GHz Pulse Modulator 32 50 GHz 26 5 32 GHz 10 MHz 13 5 GHz A13 50 GHz DOUBLER 50 OHM LOAD B29 31 B32 34 39 42 B35 37 43 46 B38 47 48 ALC Modulator 19 50 GHz Pulse Modulators...

Page 156: ...eshooting Instrument Block Diagrams 4 Port Sheet 6 LFE and Non DDS Version 6 Synthesizers 4 Instrument Block Diagrams 4 Port Sheet 6 LFE and Non DDS Version 6 Synthesizers Microwave PNA N5224 5B 4 Por...

Page 157: ...3 5 19 GHz 40 50 GHz 32 40 GHz 24 32 GHz 19 24 GHz X2 20 GHz 13 5 19 5 GHz Pulse Modulator 32 50 GHz 26 5 32 GHz 10 MHz 13 5 GHz A12 50 GHz DOUBLER B29 31 B32 34 39 42 B35 37 43 46 B38 47 48 ALC Modul...

Page 158: ...strument Block Diagrams 4 Port Sheet 7 Non LFE and DDS Version 7 Synthesizer Assemblies 4 Instrument Block Diagrams 4 Port Sheet 7 Non LFE and DDS Version 7 Synthesizer Assemblies Microwave PNA N5224...

Page 159: ...TEN 0 50 dB A48 STEP ATTEN 0 50 dB A47 STEP ATTEN 0 50 dB A46 STEP ATTEN W115 400 410 W22 401 417 419 PORT 3 PORT 1 PORT 4 PORT 2 TO A24 THRU A18 Power Limiter Power Limiter W69 W73 R1 R2 R3 R4 4 A24...

Page 160: ...g Instrument Block Diagrams 4 Port Sheet 8 LFE and DDS Version 7 Synthesizer Assemblies 4 Instrument Block Diagrams 4 Port Sheet 8 LFE and DDS Version 7 Synthesizer Assemblies Microwave PNA N5224 5B 4...

Page 161: ...A23 I L R I L R I L R IF 7 438 MHz for CW Freq 53 MHz IF 0 826 MHz for CW Freq 53 MHz W61 W62 W63 W64 W57 EXT TSET DRIVE LO OUT RECEIVER LO DRIVE W65 W66 W67 W68 FROM A23 70 0 MHz A28 MIXER BRICK 2 D...

Page 162: ...4 78 Keysight N5224B 25B Service Guide Troubleshooting Instrument Block Diagrams 4 Port Sheet 8 LFE and DDS Version 7 Synthesizer Assemblies 4...

Page 163: ...ams located at the end of Chapter 4 be available for reference as you read the information in this chapter Some paragraphs of this chapter reference your analyzer s DSP version Click Help About Networ...

Page 164: ...ter 5 Digital Processing and Digital Control Group Operation Operation of the assemblies associated with digital processing and digital control page 5 52 Power Supply Group Operation Operation of the...

Page 165: ...eiver 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 r...

Page 166: ...5 4 Keysight N5224B 25B Service Guide Theory of Operation Network Analyzer System Operation 5 Figure 5 2 2 Port System Simplified Block Diagram...

Page 167: ...5224B 25B Service Guide 5 5 Theory of Operation Network Analyzer System Operation Figure 5 3 System Block Diagram Legend LFE Block Diagrams Figure 5 4 4 Port N5290A System Simplified Block Diagram 401...

Page 168: ...alyzer can be 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...

Page 169: ...igital synthesized DDS source assembly generates a swept stepped or continuous wave CW signal in the frequency ranges as listed in the N5224 5B 900 Hz 10 MHz to 50 GHz Data Sheet and Technical Specifi...

Page 170: ...esizer board version 6 synthesizers and below there is a LFE output that is limited by the L C filter and by the 250 MHz low pass filter Below 20 MHz the LFE is signal is directly converted Exceptions...

Page 171: ...38 MHz intermediate frequency IF signals for signal processing retaining both magnitude and phase characteristics The IF signals are converted to digital information by the digital processing group Re...

Page 172: ...s the direct digital synthesizer DDS assembly s reference For the full frequency range of the version 7 synthesizers refer to the N5224 5B 900 Hz 10 MHz to 50 GHz Data Sheet and Technical Specificatio...

Page 173: ...Operation Version 7 Direct Digital Synthesizer DDS Assembly Basic Operation on page 5 16 Version 6 and Below Synthesizers Basic Operation Table 5 6 on page 5 14 lists the L O harmonic number the synth...

Page 174: ...e 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 ea...

Page 175: ...Keysight N5224B 25B Service Guide 5 13 Theory of Operation Synthesized Source Group Operation Figure 5 6 Source Group Version 6 and Below Synthesizers...

Page 176: ...1 0074 0 500 to 1 000 0 500 to 1 000 0 500 to 1 000 7 1 1 0074 to 2 0074 1 0074 to 2 0074 1 000 to 2 000 1 000 to 2 000 1 000 to 2 000 8 1 2 0074 to 3 0074 2 0074 to 3 0074 2 000 to 3 000 2 000 to 3...

Page 177: ...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 14 2211 10 125 to 10 664 20 250 to 21 328 40 500 to 42 656...

Page 178: ...gnal is sent to the A16 SPAM board for digital processing The A15 13 5 GHz DDS assembly produces an incident signal that is sent through the A5 26 5 GHz source board and then through the A7 and A8 dou...

Page 179: ...Keysight N5224B 25B Service Guide 5 17 Theory of Operation Synthesized Source Group Operation Figure 5 7 Source Group Version 7 Part 1 Example of Option 401 top image and Option 417 LFE bottom image...

Page 180: ...053 to 0 175 4 1 0 175 to 0 250 0 177479 to 0 252479 0 175 to 0 250 0 175 to 0 250 5 1 0 250 to 0 500 0 252479 to 0 502479 0 250 to 0 500 0 250 to 0 500 6 1 0 500 to 3 200 0 520479to 3 202479 0 500 to...

Page 181: ...200 to 16 000 30 400 to 32 000 23 1 7 600 to 9 520 10 667493 to 12 034160 16 000 to 18 050 32 000 to 36 100 24 1 7 600 to 9 520 12 034160 to 12 694160 18 050 to 19 040 36 100 to 38 080 25 1 9 520 to 1...

Page 182: ...e output of the A15 13 5 GHz synthesizer board the LO synthesizer is 7 438 MHz higher than the output of the A4 and A17 13 5 GHz synthesizer boards the source synthesizers This is because the output o...

Page 183: ...or each of eight receivers A D and R1 R4 Refer to A27 and A28 Mixer Bricks on page 5 47 for a more complete description Rear Panel Interconnects A5 and A10 26 5 GHz Source Boards The A10 26 5 GHz sour...

Page 184: ...to the doubler board output For bands 19 30 the input signals of all four doubler boards are doubled amplified and filtered then sent to the doubler board output Doubler board output signals for bands...

Page 185: ...oard serves these functions to act as an interface between the A21 CPU board and the auxiliary rear panel interconnects to provide ALC signals to the A25 HMA26 5 10 MHz REF INPUT s n prefixes 6021 onl...

Page 186: ...nine control signal lines one ground and a power supply line This connector has Type 2 output pin assignments as listed in Table 5 4 on page 5 25 All signals are TTL compatible Data input output ports...

Page 187: ...onnector Pin Assignments Table 5 5 Table 5 6 Table 5 7 Rectangular 36 Pin Female Connector Pin Numbers Name Function 1 GND 0 V ground reference 2 INPUT1 TTL in negative pulse 1 s min latches OUTPUT1 2...

Page 188: ...l Write Strobe TTL out active low pass fail write strobe 1 s min Table 5 8 PWR I O Connector Pin Assignments DB 9 Female Connector Pin Name Description 1 15V 15 V 400 mA 2 15V 15 V 400 mA 3 AnalogOut1...

Page 189: ...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 Rin 1 M ohm BW 1 MHz ADC c...

Page 190: ...oard J102 connected to LFE board J20 LFE output of the LO board J102 connected to LFE board J18 The main connector of the Motherboard bus to LFE board connector J1 Outputs LF output J2 900 Hz 100 MHz...

Page 191: ...e 5 29 Theory of Operation Synthesized Source Group Operation 5 IF outputs J7 J11 J12 J13 J14 to be connected to the IF MUX board A B C D and R Figure 5 8 Block Diagram with Synthesizer Board and LFE...

Page 192: ...sight N5224B 25B Service Guide Theory of Operation Synthesized Source Group Operation 5 Figure 5 9 2 Port with LFE Figure 5 10 4 Port with LFE Bias combiners Synthesizer Bias combiners Synthesizer Syn...

Page 193: ...sight N5224B 25B Service Guide 5 31 Theory of Operation Synthesized Source Group Operation Figure 5 11 2 Port LFE with IF MUX Board Figure 5 12 4 Port LFE with IF MUX Board Bias combiners Bias combine...

Page 194: ...A13 SRC Synthesizer LFE OUT 0 0 000 to 0 0000 1 0 0005 to 0 00095 2 000 to 4 000 4 1048576 4194304 0 00048 to 0 00095 0 00095 to 0 00191 2 000 to 4 000 4 524288 2097152 0 00095 to 0 00191 0 00191 to...

Page 195: ...000 to 9 9000 2 000 to 4 000 4 64 256 7 81250 to 15 62500 3 9 9000 to 10 01000 2 000 to 4 000 4 64 256 7 81250 to 15 62500 4 10 01000 to 19 99000 2 000 to 4 000 4 64 256 7 81250 to 15 62500 5 1 99000...

Page 196: ...Some of the LFE options are not available on all models Table 5 10 LFE Bands 2 of 2 S N Prefix 6021 Only Band A11 LO Synthesizer VCO IF Mode DIV N Synth RF Path Synth RF Output 0 1 2 000 to 4 000 IF2...

Page 197: ...CLK LFE 7 81000 to 9 9000 4 DDS_CLK LFE 3 9 9000 to 10 01000 IF2 4 DDS_CLK LFE 4 10 01000 to 19 99000 Thru 4 DDS_CLK LFE 5 1 99000 to 31 25000 IF1 4 DDS_CLK LFE 31 5000 to 53 0000 4 DDS_CLK LFE 6 53 0...

Page 198: ...sa 1 of 2 S N Prefix 6021 Only a A15 Direct Digital Synthesizer DDS assembly column only applies to version 7 synthesizers in instruments with a s n prefix 6021 or that have been updated to version 7...

Page 199: ...he LFE options are not available on all models Table 5 12 LFE Bands 2 of 2 S N Prefix 6021 Only Band A15 DDS LO Synthesizer OCXO a IF Mode DIV N Synth RF Path Synth RF Output 0 1 2 000 to 4 000 IF2 4...

Page 200: ...icated mixers which are the LFE board These mixers downconvert the RF signals in LFE mode and create dedicated IF signals These IF signals are then sent to the A24 IF Mux board 2 1 0000 to 1 95313 Thr...

Page 201: ...combiners The design of this combiner has an impact on the design of the board Performances desired at the PNA test port are impacted significantly by the bias combiner LFE frequency band The LFE ext...

Page 202: ...Service Guide Theory of Operation Synthesized Source Group Operation 5 Figure 5 13 Frequency Bands Without LFE Version 6 and Below Synthesizers 6021 Figure 5 14 Frequency Bands with LFE Version 6 and...

Page 203: ...Tee Combiners Optional Configurable Test Set The configurable test set is included in the standard analyzer and allows you to measure devices with higher power and higher dynamic range limits than an...

Page 204: ...he forward direction for example the signal flow through the test port 2 coupler A36 is reversed by arranging the front panel jumpers such that RCVR B IN connects to CPLR THRU and CPLR ARM connects to...

Page 205: ...between the A29 A32 receiver couplers and the A33 A36 test port couplers On selected 2 port models a step attenuator and a bias tee are placed in the signal path of each test port between the A29 A32...

Page 206: ...5 44 Keysight N5224B 25B Service Guide Theory of Operation Signal Separation Group Operation 5 Figure 5 15 4 Port Signal Separation Group...

Page 207: ...Keysight N5224B 25B Service Guide 5 45 Theory of Operation Signal Separation Group Operation Figure 5 16 2 Port Signal Separation Group...

Page 208: ...of each test port between the A29 and A32 reference couplers and the A33 and A36 test port couplers The 60 dB step attenuators provide coarse power control for the test signals They are electro mechan...

Page 209: ...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...

Page 210: ...multaneously 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 pro...

Page 211: ...lse 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 Pul...

Page 212: ...5 50 Keysight N5224B 25B Service Guide Theory of Operation Receiver Group Operation 5 Figure 5 17 4 Port Receiver Group...

Page 213: ...Keysight N5224B 25B Service Guide 5 51 Theory of Operation Receiver Group Operation Figure 5 18 2 Port Receiver Group...

Page 214: ...isplay 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 19 on pa...

Page 215: ...Keysight N5224B 25B Service Guide 5 53 Theory of Operation Digital Processing and Digital Control Group Operation Figure 5 19 Digital Processing and Digital Control Group...

Page 216: ...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 US...

Page 217: ...g 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...

Page 218: ...state drive 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...

Page 219: ...og 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 o...

Page 220: ...5 58 Keysight N5224B 25B Service Guide Theory of Operation Power Supply Group Operation 5...

Page 221: ...ow 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 defini...

Page 222: ...hnologies 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...

Page 223: ...r 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 Repai...

Page 224: ...red 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 defect...

Page 225: ...Keysight N5224B 25B Service Guide 6 5 Replaceable Parts Rebuilt Exchange Assemblies Figure 6 1 Module Exchange Procedure...

Page 226: ...ur Keysight microwave PNA You can find the locations of replaceable parts in this section listed by reference designator in Table 6 1 or listed by the type of part in Table 6 2 Table 6 1 Part Number L...

Page 227: ...board A14 Frequency reference board Applies to PNA models with serial numbers 6021 only A15 13 5 GHz LO synthesizer board Applies to PNA models with serial numbers 6021 only A15 DDS Direct digital syn...

Page 228: ...ver 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 mi...

Page 229: ...5 20013 N5245 20022 N5245 20023 N5245 20101 and N5245 20150 cables are only used with a legacy HMA26 5 p n 5087 7765 If you are unclear which HMA26 5 assembly your PNA has installed refer to Chapter 7...

Page 230: ...l Number Prefix 6021 on page 6 84 4 Port Configuration Serial Number Prefix 6021 on page 6 137 4 Port Configurations Serial Number Prefix 6021 on page 6 204 Rear Panel Assembly All Options on page 6 2...

Page 231: ...rs with handles N5240 80040 1 Keypad overlay N5227 80021 1 Lower front panel overlay 2 port Option 200 N5227 80022 Lower front panel overlay 2 port Option 201 and Option 219 N5225 80009 Lower front pa...

Page 232: ...ith 0515 1946 subpanel screws N5240 40002 1 Trim bottom goes on the outside underneath the Front Frame frame All PNA models 0515 1946 12a Machine screw M3 0 x 6 mm flat head To attach lower dress pane...

Page 233: ...Keysight N5224B 25B Service Guide 6 13 Replaceable Parts Replaceable Parts Listings Figure 6 2 Front Panel Assembly Front Side All Options...

Page 234: ...90 0016 1 Washer RPG secure to attach RPG board N5340 63083 1 RPG board 2090 1092 1 Touch display LCD 12 1 inch N5242 00045 LCD 1 LCD Mounting plate W1312 40016 1 Foam mount speaker to attach speaker...

Page 235: ...acket In Figure 6 5 on page 18 only one bracket is shown 8121 2173 1 LCD Cable assembly 30AWG 300V 12 pin plug to 8 pin plug E5071 61653 1 LCD display cable N5240 60073 1 Touch screen controller board...

Page 236: ...6 16 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 3 Front Panel Assembly Back Side All Options...

Page 237: ...Keysight N5224B 25B Service Guide 6 17 Replaceable Parts Replaceable Parts Listings Figure 6 4 A3 Display Assembly with Interface Board USB Assemblies...

Page 238: ...6 18 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 5 A3 Display Assembly with LCD Display 2090 1092 LED and Side Brackets...

Page 239: ...nce Desig nator Part Number Qty Description A4 N5240 60074 Was N5242 60150 1 13 5 GHz source 1 synthesizer board A5 5087 7342 1 26 5 GHz source 1 board A6 Not used A7 5087 7349 1 Doubler assembly por...

Page 240: ...xide 3V 0 22A hr e 1250 4261 Was 1810 0118 1 50 ohm load a For the latest information on CPUs and associated drives visit https www key sight com us en assets 9922 01369 miscellaneous PNA Hard Drives...

Page 241: ...Keysight N5224B 25B Service Guide 6 21 Replaceable Parts Replaceable Parts Listings Figure 6 6 Top Assemblies All Options S N Prefixes 6021...

Page 242: ...1 A7 port 1 doubler to W12 2 port or W105 4 port W13 SR N5245 20036 1 A12 port 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...

Page 243: ...frequency reference board J2 W149 F N5247 60023 1 A24 IF multiplexer board P603 to A16 SPAM board J2 SPAM 5 2 port W150 F N5247 60024 1 A24 IF multiplexer board P203 to A16 SPAM board J5 SPAM 5 2 port...

Page 244: ...6 24 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 7 Top Cables All Cables All Options S N Prefixes 6021...

Page 245: ...rt number or the new part number Refere nce Desig nator Part Number Qty Description A4 Not used A5 5087 7342 1 26 5 GHz source 1 board A6 Not used A7 5087 7349 1 Doubler assembly port 1 A8 5087 7349 1...

Page 246: ...10 0118 1 50 ohm load a For the latest information on CPUs and associated drives visit https www key sight com us en assets 9922 01369 miscellaneous PNA Hard Drives and CPUs pdf b The A55 solid state...

Page 247: ...Keysight N5224B 25B Service Guide 6 27 Replaceable Parts Replaceable Parts Listings Figure 6 8 Top Assemblies All Options S N Prefixes 6021...

Page 248: ...12 port 3 doubler to A13 port 4 doubler W11 SR N5245 20036 1 A7 port 1 doubler to W12 2 port or W105 4 port W13 SR N5245 20036 1 A12 port 3 doubler to W14 2 port or W111 4 port W15 SR N5245 20036 1 A1...

Page 249: ...FE board to A11 DD Synth Source 1 J12 to A70 LFE J20 W209 F N5242 60114 1 A70 LFE board to A11 DD Synth Source 2 J14 to A70 LFE J21 W210 F N5242 60113 1 A70 A75 LFE board to A11 DD Synth LO J13 to A70...

Page 250: ...6 30 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 9 Top Cables All Cables All Options S N Prefixes 6021...

Page 251: ...to your B model PNA In August 2020 the N5224 44B and N5225 45B analyzers underwent multiple hardware changes Some instruments that have A25 5087 7765 HMA26 5 multiplier amplifier with a discrete A26...

Page 252: ...emblies on page 6 4 b All new units built after August 2009 no longer use the N5242 60031 cable that was attached to connector P1001 and Source 2 As a result of this change the IF multiplexer boards h...

Page 253: ...Keysight N5224B 25B Service Guide 6 33 Replaceable Parts Replaceable Parts Listings Figure 6 10 Bottom Assemblies Standard 2 Port Configuration Option 200 S N Prefix 6021...

Page 254: ...er brick W107b SR N5224 20046 Was N5224 20005 1 A29 port 1 receiver coupler to mixer brick R1 via A68 3 dB pad W110 SR N5224 20006 1 A32 port 2 receiver coupler to mixer brick R2 W111 SR N5224 20012 1...

Page 255: ...Keysight N5224B 25B Service Guide 6 35 Replaceable Parts Replaceable Parts Listings Figure 6 11 Bottom RF Cables Standard 2 Port Configuration Option 200 S N Prefix 6021...

Page 256: ...23 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...

Page 257: ...Keysight N5224B 25B Service Guide 6 37 Replaceable Parts Replaceable Parts Listings Figure 6 12 Bottom Ribbon Cables and Wire Harnesses Standard 2 Port Configuration Option 200 S N Prefix 6021...

Page 258: ...d by these changes The mixer block and 50 ohm pad changes do not impact PNAs with Options 210 410 But the HMA26 5 multiplier amplifier changes are potentially applicable to all Options Be very careful...

Page 259: ...IF multiplexer boards have had their P1001 connectors removed If your instrument contains a N5242 60031 cable remove it from your instrument c All new units built after August 2009 no longer use the...

Page 260: ...6 40 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 13 Bottom Assemblies 2 Port Option 201 S N Prefix 6021...

Page 261: ...ceiver coupler to front panel REF 2 SOURCE OUT W36 SR N5245 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...

Page 262: ...eplaceable Parts Replaceable Parts Listings 6 W191 W193 F Refer to Top Cables All Cables All Options S N Prefixes 6021 on page 6 22 a SR semirigid coaxial cable F flexible coaxial cable Reference Desi...

Page 263: ...Keysight N5224B 25B Service Guide 6 43 Replaceable Parts Replaceable Parts Listings Figure 6 14 Bottom RF Cables 2 Port Option 201 S N Prefix 6021...

Page 264: ...r switch 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 mothe...

Page 265: ...Keysight N5224B 25B Service Guide 6 45 Replaceable Parts Replaceable Parts Listings Figure 6 15 Bottom Ribbon Cables and Wire Harnesses 2 Port Option 201 S N Prefix 6021...

Page 266: ...manual to learn which assemblies and cables may be impacted by these changes The mixer block and 50 ohm pad changes do not impact PNAs with Options 210 410 But the HMA26 5 multiplier amplifier change...

Page 267: ...use the N5242 60031 cable that was attached to connector P1001 and Source 2 As a result of this change the IF multiplexer boards have had their P1001 connectors removed If your instrument contains a N...

Page 268: ...6 48 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 16 Bottom Assemblies 2 Port Option 205 S N Prefix 6021...

Page 269: ...1 Front panel port 2 RCVR B IN to A27 mixer brick B W41 SR N5245 20006 1 A37 reference mixer switch to front panel REF 1 RCVR R1 IN W42 SR N5245 20007 1 REF 1 SOURCE OUT to A37 reference mixer switch...

Page 270: ...bias combiner port 2 W188 SR N5245 20183 1 Cable assy RF FP A36 test port coupler to A74 bias combiner port 2 W194 F N5240 60097 4 Cable assembly coaxial LFE Port 1 bias combiner RF IN to Port1 A75 LF...

Page 271: ...Keysight N5224B 25B Service Guide 6 51 Replaceable Parts Replaceable Parts Listings Figure 6 17 Bottom RF Cables 2 Port Option 205 S N Prefix 6021...

Page 272: ...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 A...

Page 273: ...Keysight N5224B 25B Service Guide 6 53 Replaceable Parts Replaceable Parts Listings Figure 6 18 Bottom Ribbon Cables and Wire Harnesses 2 Port Option 205 S N Prefix 6021...

Page 274: ...est port 2 6 dB attenuator A68 08490 60039 1 3 dB attenuator pad connected to mixer brick R1 N5240 60058 2 Front panel LED board a Part numbers in italic typeface are for rebuilt exchange assemblies R...

Page 275: ...Keysight N5224B 25B Service Guide 6 55 Replaceable Parts Replaceable Parts Listings Figure 6 19 Bottom Assemblies 2 Port Option 210 S N Prefix 6021...

Page 276: ...N5242 60018 1 A27 mixer brick B to A24 IF multiplexer P201 W69 73 F Refer to Top Cables All Cables All Options S N Prefixes 6021 on page 6 22 W80 SR N5245 20048 1 A25 HMA26 5 to A27 mixer brick W107...

Page 277: ...Keysight N5224B 25B Service Guide 6 57 Replaceable Parts Replaceable Parts Listings Figure 6 20 Bottom RF Cables 2 Port Option 210 S N Prefix 6021...

Page 278: ...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...

Page 279: ...Keysight N5224B 25B Service Guide 6 59 Replaceable Parts Replaceable Parts Listings Figure 6 21 Bottom Ribbon Cables and Wire Harnesses 2 Port Option 210 S N Prefix 6021...

Page 280: ...assemblies and cables may be impacted by these changes The mixer block and 50 ohm pad changes do not impact PNAs with Options 210 410 But the HMA26 5 multiplier amplifier changes are potentially appl...

Page 281: ...0031 cable that was attached to connector P1001 and Source 2 As a result of this change the IF multiplexer boards have had their P1001 connectors removed If your instrument contains a N5242 60031 cabl...

Page 282: ...6 62 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 22 Bottom Assemblies 2 Port Option 217 S N Prefix 6021...

Page 283: ...A37 reference mixer switch W43 SR N5245 20009 1 A37 reference mixer switch to A27 mixer brick R1 W47 SR N5245 20119 1 A27 mixer brick R2 to front panel REF 2 RCVR R2 IN 2 port only W51 SR Refer to To...

Page 284: ...0057 1 A49 port 2 receiver attenuator to A27 mixer brick B W147 F N5242 60025 1 A27 mixer brick R1 to A24 IF multiplexer P601 W148 F N5242 60026 1 A27 mixer brick R2 to A24 IF multiplexer P801 a SR se...

Page 285: ...Keysight N5224B 25B Service Guide 6 65 Replaceable Parts Replaceable Parts Listings Figure 6 23 Bottom RF Cables 2 Port Option 217 S N Prefix 6021...

Page 286: ...ch 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...

Page 287: ...Keysight N5224B 25B Service Guide 6 67 Replaceable Parts Replaceable Parts Listings Figure 6 24 Bottom Ribbon Cables and Wire Harnesses 2 Port Option 217 S N Prefix 6021...

Page 288: ...n which assemblies and cables may be impacted by these changes The mixer block and 50 ohm pad changes do not impact PNAs with Options 210 410 But the HMA26 5 multiplier amplifier changes are potential...

Page 289: ...its built after August 2009 no longer use the N5242 60031 cable that was attached to connector P1001 and Source 2 As a result of this change the IF multiplexer boards have had their P1001 connectors r...

Page 290: ...6 70 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 25 Bottom Assemblies 2 Port Option 219 S N Prefix 6021...

Page 291: ...R2 to front panel REF 2 RCVR R2 IN 2 port only W51 SR Refer to Top Cables All Cables All Options S N Prefixes 6021 on page 6 22 W56 SR N5245 20103 1 W55 to rear panel EXT TSET DRIVE RF OUT J6 W57 SR N...

Page 292: ...iver attenuator W104 SR N5245 20057 1 A49 port 2 receiver attenuator to A27 mixer brick B W147 F N5242 60025 1 A27 mixer brick R1 to A24 IF multiplexer P601 W148 F N5242 60026 1 A27 mixer brick R2 to...

Page 293: ...Keysight N5224B 25B Service Guide 6 73 Replaceable Parts Replaceable Parts Listings Figure 6 26 Bottom RF Cables 2 Port Option 219 S N Prefix 6021...

Page 294: ...J1 20R N5247 60015 Was N5245 60008 A23 test set motherboard 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 J...

Page 295: ...Keysight N5224B 25B Service Guide 6 75 Replaceable Parts Replaceable Parts Listings Figure 6 27 Bottom Ribbon Cables and Wire Harnesses 2 Port Option 219 S N Prefix 6021...

Page 296: ...o learn which assemblies and cables may be impacted by these changes The mixer block and 50 ohm pad changes do not impact PNAs with Options 210 410 But the HMA26 5 multiplier amplifier changes are pot...

Page 297: ...hange 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 that was attached to connector P1001 and Source 2 As a res...

Page 298: ...6 78 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 28 Bottom Assemblies 2 Port Option 220 S N Prefix 6021...

Page 299: ...l Cables All Options S N Prefixes 6021 on page 6 22 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...

Page 300: ...assembly FP port 1 A71 bias combiner to A33 front panel test port coupler port 1 2 port with Option LFE only W187 SR N5245 20179 1 RF cable assembly FP port 2 CPLR THRU to A74 bias combiner port 2 W1...

Page 301: ...Keysight N5224B 25B Service Guide 6 81 Replaceable Parts Replaceable Parts Listings Figure 6 29 Bottom RF Cables 2 Port Option 220 S N Prefix 6021...

Page 302: ...st set motherboard J551 to A27 mixer brick 1 J52 2W N5240 60091 P O bias combiner A23 test set motherboard J541 to A42 port 1 bias tee 3W N5225 60001 A23 test set motherboard J222 to ports 2 4 LED boa...

Page 303: ...Keysight N5224B 25B Service Guide 6 83 Replaceable Parts Replaceable Parts Listings Figure 6 30 Bottom Ribbon Cables and Wire Harnesses 2 Port Option 220 S N Prefix 6021...

Page 304: ...ollowing may apply to your B model PNA In August 2020 the N5224 44B and N5225 45B analyzers underwent multiple hardware changes Some instruments that have A25 5087 7765 HMA26 5 multiplier amplifier wi...

Page 305: ...9 A32 5087 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 1250 4261 1 50 ohm terminati...

Page 306: ...6 86 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 31 Bottom Assemblies Standard 2 Port Configuration Option 200 S N Prefix 6021...

Page 307: ...er brick W107b SR N5224 20046 Was N5224 20005 1 A29 port 1 receiver coupler to mixer brick R1 via R1 A68 3 dB pad W110 SR N5224 20006 1 A32 port 2 receiver coupler to mixer brick R2 W111 SR N5224 2001...

Page 308: ...6 88 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 32 Bottom RF Cables Standard 2 Port Configuration Option 200 S N Prefix 6021...

Page 309: ...3 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 L...

Page 310: ...6 90 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 33 Bottom Ribbon Cables and Wire Harnesses Standard 2 Port Configuration Option 200 S N Prefix 6021...

Page 311: ...y be impacted by these changes The mixer block and 50 ohm pad changes do not impact PNAs with Options 210 410 But the HMA26 5 multiplier amplifier changes are potentially applicable to all Options Be...

Page 312: ...o connector P1001 and Source 2 As a result of this change the IF multiplexer boards have had their P1001 connectors removed If your instrument contains a N5242 60031 cable remove it from your instrume...

Page 313: ...Keysight N5224B 25B Service Guide 6 93 Replaceable Parts Replaceable Parts Listings Figure 6 34 Bottom Assemblies 2 Port Option 201 S N Prefix 6021...

Page 314: ...RCE OUT W36 SR N5245 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...

Page 315: ...Keysight N5224B 25B Service Guide 6 95 Replaceable Parts Replaceable Parts Listings a SR semirigid coaxial cable F flexible coaxial cable...

Page 316: ...6 96 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 35 Bottom RF Cables 2 Port Option 201 S N Prefix 6021...

Page 317: ...switch 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 mother...

Page 318: ...6 98 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 36 Bottom Ribbon Cables and Wire Harnesses 2 Port Option 201 S N Prefix 6021...

Page 319: ...impacted by these changes The mixer block and 50 ohm pad changes do not impact PNAs with Options 210 410 But the HMA26 5 multiplier amplifier changes are potentially applicable to all Options Be very...

Page 320: ...the N5242 60031 cable that was attached to connector P1001 and Source 2 As a result of this change the IF multiplexer boards have had their P1001 connectors removed If your instrument contains a N524...

Page 321: ...Keysight N5224B 25B Service Guide 6 101 Replaceable Parts Replaceable Parts Listings Figure 6 37 Bottom Assemblies 2 Port Option 205 S N Prefix 6021...

Page 322: ...panel port 2 RCVR B IN to A27 mixer brick B W41 SR N5245 20006 1 A37 reference mixer switch to front panel REF 1 RCVR R1 IN W42 SR N5245 20007 1 REF 1 SOURCE OUT to A37 reference mixer switch W43 SR N...

Page 323: ...y coaxial LFE Port 1 bias combiner RF IN to Port1 A75 LFE board W197 Cable assembly coaxial LFE Port 2 bias combiner RF IN to Port2 A75 LFE board W200 W209 W210 F Refer to Top Cables All Cables All Op...

Page 324: ...6 104 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 38 Bottom RF Cables 2 Port Option 205 S N Prefix 6021...

Page 325: ...oard 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 A2...

Page 326: ...6 106 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 39 Bottom Ribbon Cables and Wire Harnesses 2 Port Option 205 S N Prefix 6021...

Page 327: ...attenuator DC 50GHz with option 003 mixer brick R1 N5240 60058 2 Front panel LED board 1250 4261 1 50 ohm termination connect to HMA26 5 top connector Indicated but not shown in figure a Part numbers...

Page 328: ...6 108 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 40 Bottom Assemblies 2 Port Option 210 S N Prefix 6021...

Page 329: ...F N5242 60018 1 A27 mixer brick B to A24 IF multiplexer P201 W69 73 F Refer to Top Cables All Cables All Options S N Prefixes 6021 on page 6 28 W80 SR N5245 20048 1 A25 HMA26 5 to A27 mixer brick W10...

Page 330: ...6 110 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 41 Bottom RF Cables 2 Port Option 210 S N Prefix 6021...

Page 331: ...R 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...

Page 332: ...6 112 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 42 Bottom Ribbon Cables and Wire Harnesses 2 Port Option 210 S N Prefix 6021...

Page 333: ...h assemblies and cables may be impacted by these changes The mixer block and 50 ohm pad changes do not impact PNAs with Options 210 410 But the HMA26 5 multiplier amplifier changes are potentially app...

Page 334: ...built after August 2009 no longer use the N5242 60031 cable that was attached to connector P1001 and Source 2 As a result of this change the IF multiplexer boards have had their P1001 connectors remo...

Page 335: ...Keysight N5224B 25B Service Guide 6 115 Replaceable Parts Replaceable Parts Listings Figure 6 43 Bottom Assemblies 2 Port Option 217 S N Prefix 6021...

Page 336: ...o A37 reference mixer switch W43 SR N5245 20009 1 A37 reference mixer switch to A27 mixer brick R1 W46 SR N5245 20119 1 A27 mixer brick R2 to front panel REF 2 RCVR R2 IN 2 port only W51 SR Refer to T...

Page 337: ...A27 mixer brick B W147 F N5242 60025 1 A27 mixer brick R1 to A24 IF multiplexer P601 W148 F N5242 60026 1 A27 mixer brick R2 to A24 IF multiplexer P801 W210 F Refer to Top Cables All Cables All Option...

Page 338: ...6 118 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 44 Bottom RF Cables 2 Port Option 217 S N Prefix 6021...

Page 339: ...21 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 16R N5245 600...

Page 340: ...6 120 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 45 Bottom Ribbon Cables and Wire Harnesses 2 Port Option 217 S N Prefix 6021...

Page 341: ...rn which assemblies and cables may be impacted by these changes The mixer block and 50 ohm pad changes do not impact PNAs with Options 210 410 But the HMA26 5 multiplier amplifier changes are potentia...

Page 342: ...built Exchange Assemblies on page 6 4 b All new units built after August 2009 no longer use the N5242 60031 cable that was attached to connector P1001 and Source 2 As a result of this change the IF mu...

Page 343: ...Keysight N5224B 25B Service Guide 6 123 Replaceable Parts Replaceable Parts Listings Figure 6 46 Bottom Assemblies 2 Port Option 219 S N Prefix 6021...

Page 344: ...R2 to front panel REF 2 RCVR R2 IN 2 port only W51 SR Refer to Top Cables All Cables All Options S N Prefixes 6021 on page 6 28 W56 SR N5245 20103 1 W55 to rear panel EXT TSET DRIVE RF OUT J6 W57 SR...

Page 345: ...eiver attenuator W104 SR N5245 20057 1 A49 port 2 receiver attenuator to A27 mixer brick B W147 F N5242 60025 1 A27 mixer brick R1 to A24 IF multiplexer P601 W148 F N5242 60026 1 A27 mixer brick R2 to...

Page 346: ...6 126 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 47 Bottom RF Cables 2 Port Option 219 S N Prefix 6021...

Page 347: ...et motherboard 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...

Page 348: ...6 128 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 48 Bottom Ribbon Cables and Wire Harnesses 2 Port Option 219 S N Prefix 6021...

Page 349: ...to learn which assemblies and cables may be impacted by these changes The mixer block and 50 ohm pad changes do not impact PNAs with Options 210 410 But the HMA26 5 multiplier amplifier changes are po...

Page 350: ...ire harness N5240 60058 2 Front panel LED board 1250 4261 1 50 ohm termination connect to HMA26 5 top connector Indicated but not shown in figure a Part numbers in italic typeface are for rebuilt exch...

Page 351: ...Keysight N5224B 25B Service Guide 6 131 Replaceable Parts Replaceable Parts Listings Figure 6 49 Bottom Assemblies 2 Port Option 220 S N Prefix 6021...

Page 352: ...ll Cables All Options S N Prefixes 6021 on page 6 28 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...

Page 353: ...Cable assy RF FP port 2 CPLR THRU to A74 bias combiner port 2 W194 F N5240 60097 4 Cable assembly coaxial LFE Port 1 bias combiner RF IN to Port1 A75 LFE board W197 Cable assembly coaxial LFE Port 2 b...

Page 354: ...6 134 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 50 Bottom RF Cables 2 Port Option 220 S N Prefix 6021...

Page 355: ...t set motherboard J551 to A27 mixer brick 1 J52 2W N5240 60091 P O bias combiner A23 test set motherboard J541 to A42 port 1 bias tee 3W N5225 60001 A23 test set motherboard J222 to ports 2 4 LED boar...

Page 356: ...6 136 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 51 Bottom Ribbon Cables and Wire Harnesses 2 Port Option 220 S N Prefix 6021...

Page 357: ...following may apply to your B model PNA In August 2020 the N5224 44B and N5225 45B analyzers underwent multiple hardware changes Some instruments that have A25 5087 7765 HMA26 5 multiplier amplifier w...

Page 358: ...anel LED board A68 A69 08490 60039d 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 Assemblies...

Page 359: ...Keysight N5224B 25B Service Guide 6 139 Replaceable Parts Replaceable Parts Listings Figure 6 52 Bottom Assemblies Standard 4 Port Configuration Option 400 S N Prefix 6021...

Page 360: ...61 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...

Page 361: ...ich HMA26 5 assembly your PNA has installed refer to Chapter 7 Repairs and Figure 7 19 on page 7 40 and for details on A26 splitter and cabling refer to your option model in Chapter 6 2 Port Configura...

Page 362: ...6 142 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 53 Bottom RF Cables Standard 4 Port Configuration Option 400 S N Prefix 6021...

Page 363: ...2 to A28 mixer brick 2 J52 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...

Page 364: ...6 144 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 54 Bottom Ribbon Cables and Wire Harnesses Standard 4 Port Configuration Option 400 S N Prefix 6021...

Page 365: ...mpacted by these changes The mixer block and 50 ohm pad changes do not impact PNAs with Options 210 410 But the HMA26 5 multiplier amplifier changes are potentially applicable to all Options Be very c...

Page 366: ...change the IF multiplexer boards have had their P1001 connectors removed If your instrument contains a N5242 60031 cable remove it from your instrument c All new units built after August 2009 no long...

Page 367: ...Keysight N5224B 25B Service Guide 6 147 Replaceable Parts Replaceable Parts Listings Figure 6 55 Bottom Assemblies 4 Port Option 401 S N Prefix 6021...

Page 368: ...A30 port 3 receiver coupler to front panel REF 3 SOURCE OUT W26 SR N5245 20015 1 A34 port 3 coupler to front panel Port 3 CPLR ARM W27 SR N5245 20052 1 A31 port 4 receiver coupler to front panel Port...

Page 369: ...A24 IF multiplexer P601 W69 73 F Refer to Top Cables All Cables All Options S N Prefixes 6021 on page 6 22 W203c SR N5245 20195 1 RF cable A25 HMA26 5 top to A28 mixer brick top N5247 20138 1 Dust ca...

Page 370: ...6 150 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 56 Bottom RF Cables 4 Port Option 401 S N Prefix 6021...

Page 371: ...set motherboard J554 to A37 reference mixer switch 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 bri...

Page 372: ...6 152 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 57 Bottom Ribbon Cables and Wire Harnesses 4 Port Option 401 S N Prefix 6021...

Page 373: ...and cables may be impacted by these changes The mixer block and 50 ohm pad changes do not impact PNAs with Options 210 410 But the HMA26 5 multiplier amplifier changes are potentially applicable to al...

Page 374: ...nits built after August 2009 no longer use the N5242 60031 cable that was attached to connector P1001 and Source 2 As a result of this change the IF multiplexer boards have had their P1001 connectors...

Page 375: ...Keysight N5224B 25B Service Guide 6 155 Replaceable Parts Replaceable Parts Listings Figure 6 58 Bottom Assemblies 4 Port Option 405 S N Prefix 6021...

Page 376: ...to front panel Port 3 CPLR ARM W27 SR N5245 20052 1 A31 port 4 receiver coupler to front panel Port 4 SOURCE OUT W30 SR N5245 20018 1 A35 port 4 coupler to front panel port 4 CPLR ARM W31 SR N5245 200...

Page 377: ...5242 60023 1 A28 mixer brick C to A24 IF multiplexer P601 W69 73 F Refer to Top Cables All Cables All Options S N Prefixes 6021 on page 6 22 W191 W192 W193 F Refer to Top Cables All Cables All Options...

Page 378: ...talled A68 A69 3 dB attenuators are only applicable to instruments with legacy 5087 7323 5087 6323 mixer bricks The new 5087 7417 mixer brick have the 3 dB pads inte grated into the mixer brick assemb...

Page 379: ...Keysight N5224B 25B Service Guide 6 159 Replaceable Parts Replaceable Parts Listings Figure 6 59 Bottom RF Cables 4 Port Option 405 S N Prefix 6021...

Page 380: ...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...

Page 381: ...Keysight N5224B 25B Service Guide 6 161 Replaceable Parts Replaceable Parts Listings Figure 6 60 Bottom Ribbon Cables and Wire Harnesses 4 Port Option 405 S N Prefix 6021...

Page 382: ...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...

Page 383: ...Keysight N5224B 25B Service Guide 6 163 Replaceable Parts Replaceable Parts Listings Figure 6 61 Bottom Assemblies 4 Port Option 410 S N Prefix 6021...

Page 384: ...28 mixer brick C W121 SR N5224 20018 1 A66 port 4 6 dB attenuator to A35 port 4 coupler W109b SR N5224 20027 1 A31 port 4 receiver coupler to A28 mixer brick R4 A69 3 dB pad W117 SR N5224 20026 1 A35...

Page 385: ...re only applicable to instruments with legacy 5087 7323 5087 6323 mixer bricks The new 5087 7417 mixer brick have the 3 dB pads inte grated into the mixer brick assembly Legacy A27 A28 mixer bricks us...

Page 386: ...6 166 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 62 Bottom RF Cables 4 Port Option 410 S N Prefix 6021...

Page 387: ...therboard 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 2...

Page 388: ...6 168 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 63 Bottom Ribbon Cables and Wire Harnesses 4 Port Option 410 S N Prefix 6021...

Page 389: ...and cables may be impacted by these changes The mixer block and 50 ohm pad changes do not impact PNAs with Options 210 410 But the HMA26 5 multiplier amplifier changes are potentially applicable to al...

Page 390: ...mblies on page 6 4 b All new units built after August 2009 no longer use the N5242 60031 cable that was attached to connector P1001 and Source 2 As a result of this change the IF multiplexer boards ha...

Page 391: ...Keysight N5224B 25B Service Guide 6 171 Replaceable Parts Replaceable Parts Listings Figure 6 64 Bottom Assemblies 4 Port Option 417 S N Prefix 6021...

Page 392: ...0009 1 A37 reference mixer switch to A27 mixer brick R1 W46 SR N5245 20115 1 REF 2 RCVR R2 IN to A27 mixer brick R2 W51 SR Refer to Top Cables All Cables All Options S N Prefixes 6021 on page 6 22 W52...

Page 393: ...ial cable b The A26 splitter 5067 4086 and N5245 20013 N5245 20022 N5245 20023 N5245 20101 and N5245 20150 cables are only used with a legacy HMA26 5 p n 5087 7765 If you are unclear which HMA26 5 ass...

Page 394: ...6 174 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 65 Bottom RF Cables 4 Port Option 417 Ports 1 and 2 S N Prefix 6021...

Page 395: ...CVR R4 IN to A69 3 dB pad on A28 mixer brick R4 W54c 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 bri...

Page 396: ...20022 N5245 20023 N5245 20101 and N5245 20150 cables are only used with a legacy HMA26 5 p n 5087 7765 If you are unclear which HMA26 5 assembly your PNA has installed refer to Chapter 7 Repairs and F...

Page 397: ...Keysight N5224B 25B Service Guide 6 177 Replaceable Parts Replaceable Parts Listings Figure 6 66 Bottom RF Cables 4 Port Option 417 Ports 3 and 4 S N Prefix 6021...

Page 398: ...to A47 port 3 receiver attenuator 16R N5245 60006 A23 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 A...

Page 399: ...Keysight N5224B 25B Service Guide 6 179 Replaceable Parts Replaceable Parts Listings Figure 6 67 Bottom Ribbon Cables Wire Harnesses 4 Port Option 417 S N Prefix 6021...

Page 400: ...y be impacted by these changes The mixer block and 50 ohm pad changes do not impact PNAs with Options 210 410 But the HMA26 5 multiplier amplifier changes are potentially applicable to all Options Be...

Page 401: ...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 that w...

Page 402: ...6 182 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 68 Bottom Assemblies 4 Port Option 419 S N Prefix 6021...

Page 403: ...ference mixer switch to A27 mixer brick R1 W46 SR N5245 20115 1 REF 2 RCVR R2 IN to A27 mixer brick R2 W51 SR Refer to Top Cables All Cables All Options S N Prefixes 6021 on page 6 22 W52b SR N5245 20...

Page 404: ...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 b The A26 splitter 5067 4086 and N5245 20013...

Page 405: ...Keysight N5224B 25B Service Guide 6 185 Replaceable Parts Replaceable Parts Listings Figure 6 69 Bottom RF Cables 4 Port Option 419 Ports 1 and 2 S N Prefix 6021...

Page 406: ...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...

Page 407: ...6 and N5245 20013 N5245 20022 N5245 20023 N5245 20101 and N5245 20150 cables are only used with a legacy HMA26 5 p n 5087 7765 If you are unclear which HMA26 5 assembly your PNA has installed refer to...

Page 408: ...6 188 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 70 Bottom RF Cables 4 Port Option 419 Ports 3 and 4 S N Prefix 6021...

Page 409: ...motherboard J206 to A47 port 3 receiver attenuator 16R N5245 60006 A23 test set motherboard J547 to A39 port 3 source attenuator 2W P O bias tee A23 test set motherboard J541 to A42 port 1 bias tee 2W...

Page 410: ...o A23 test set motherboard J1 to A24 IF multiplexer board J1 25R E4410 60160 A18 system motherboard J13 to A23 test set motherboard J545 36R 8121 0834 Rear panel HANDLER I O to A23 test set motherboar...

Page 411: ...Keysight N5224B 25B Service Guide 6 191 Replaceable Parts Replaceable Parts Listings Figure 6 71 Bottom Ribbon Cables and Wire Harnesses 4 Port Option 419 S N Prefix 6021...

Page 412: ...y be impacted by these changes The mixer block and 50 ohm pad changes do not impact PNAs with Options 210 410 But the HMA26 5 multiplier amplifier changes are potentially applicable to all Options Be...

Page 413: ...xer brick R4 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 6003...

Page 414: ...6 194 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 72 Bottom Assemblies 4 Port Option 420 S N Prefix 6021...

Page 415: ...h to A27 mixer brick R1 W46 SR N5245 20115 1 REF 2 RCVR R2 IN to A27 mixer brick R2 W51 SR Refer to Top Cables All Cables All Options S N Prefixes 6021 on page 6 22 W52b SR N5245 20013 1 A25 legacy HM...

Page 416: ...RF IN to Port1 A70 LFE board W197 Cable assembly coaxial LFE Port 2 bias combiner RF IN to Port2 A70 LFE board W211 F 8120 5014 1 RF cable A70 LFE J14 to A24 IF Multiplexer P4 W212 F 8120 5017 1 RF ca...

Page 417: ...Keysight N5224B 25B Service Guide 6 197 Replaceable Parts Replaceable Parts Listings Figure 6 73 Bottom RF Cables 4 Port Option 420 Ports 1 and 2 S N Prefix 6021...

Page 418: ...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...

Page 419: ...7323 5087 6323 mixer bricks The new 5087 7417 mixer brick have the 3 dB pads inte grated into the mixer brick assembly Legacy A27 A28 mixer bricks use the 5245 20021 semi rigid cable New mixer bricks...

Page 420: ...6 200 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 74 Bottom RF Cables 4 Port Option 420 Ports 3 and 4 S N Prefix 6021...

Page 421: ...8121 0982 or N5242 60007 A23 test set motherboard J206 to A47 port 3 receiver attenuator 16R N5245 60006 A23 test set motherboard J547 to A39 port 3 source attenuator 2W N5240 60091 P O bias combiner...

Page 422: ...5242 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 motherboard J545 36R 8121 0834 Rear panel...

Page 423: ...Keysight N5224B 25B Service Guide 6 203 Replaceable Parts Replaceable Parts Listings Figure 6 75 Bottom Ribbon Cables and Wire Harnesses 4 Port Option 420 S N Prefix 6021...

Page 424: ...following may apply to your B model PNA In August 2020 the N5224 44B and N5225 45B analyzers underwent multiple hardware changes Some instruments that have A25 5087 7765 HMA26 5 multiplier amplifier...

Page 425: ...est port 1 coupler Test port 3 coupler Test port 4 coupler Test port 2 coupler N5240 60058 2 Front panel LED board a Part numbers in italic typeface are for rebuilt exchange assemblies Refer to Rebuil...

Page 426: ...6 206 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 76 Bottom Assemblies Standard 4 Port Configuration Option 400 S N Prefix 6021...

Page 427: ...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 N5242 60019 1 A28 mixer brick R4 to A24...

Page 428: ...cable b Some PNA models have newer model A27 A28 mixer blocks installed A68 A69 3 dB attenuators are only applicable to instruments with legacy 5087 7323 5087 6323 mixer bricks The new 5087 7417 mixer...

Page 429: ...Keysight N5224B 25B Service Guide 6 209 Replaceable Parts Replaceable Parts Listings Figure 6 77 Bottom RF Cables Standard 4 Port Configuration Option 400 S N Prefix 6021...

Page 430: ...52 to A28 mixer brick 2 J52 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...

Page 431: ...Keysight N5224B 25B Service Guide 6 211 Replaceable Parts Replaceable Parts Listings Figure 6 78 Bottom Ribbon Cables and Wire Harnesses Standard 4 Port Configuration Option 400 S N Prefix 6021...

Page 432: ...cables may be impacted by these changes The mixer block and 50 ohm pad changes do not impact PNAs with Options 210 410 But the HMA26 5 multiplier amplifier changes are potentially applicable to all O...

Page 433: ...er to Rebuilt Exchange Assemblies on page 6 4 b All new units built after August 2009 no longer use the N5242 60031 cable that was attached to connector P1001 and Source 2 As a result of this change t...

Page 434: ...6 214 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 79 Bottom Assemblies 4 Port Option 401 S N Prefix 6021...

Page 435: ...A30 port 3 receiver coupler to front panel REF 3 SOURCE OUT W26 SR N5245 20015 1 A34 port 3 coupler to front panel Port 3 CPLR ARM W27 SR N5245 20052 1 A31 port 4 receiver coupler to front panel Port...

Page 436: ...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 W69 73 F Refer to Top Cables All Cables All Options...

Page 437: ...Keysight N5224B 25B Service Guide 6 217 Replaceable Parts Replaceable Parts Listings Example 6 1 Bottom RF Cables 4 Port Option 401 S N Prefix 6021...

Page 438: ...t set motherboard J554 to A37 reference mixer switch 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 b...

Page 439: ...Keysight N5224B 25B Service Guide 6 219 Replaceable Parts Replaceable Parts Listings Figure 6 80 Bottom Ribbon Cables and Wire Harnesses 4 Port Option 401 S N Prefix 6021...

Page 440: ...cables may be impacted by these changes The mixer block and 50 ohm pad changes do not impact PNAs with Options 210 410 But the HMA26 5 multiplier amplifier changes are potentially applicable to all Op...

Page 441: ...n page 6 4 b All new units built after August 2009 no longer use the N5242 60031 cable that was attached to connector P1001 and Source 2 As a result of this change the IF multiplexer boards have had t...

Page 442: ...6 222 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 81 Bottom Assemblies 4 Port Option 405 S N Prefix 6021...

Page 443: ...o front panel Port 3 CPLR ARM W27 SR N5245 20052 1 A31 port 4 receiver coupler to front panel Port 4 SOURCE OUT W30 SR N5245 20018 1 A35 port 4 coupler to front panel port 4 CPLR ARM W31 SR N5245 2004...

Page 444: ...o A24 IF multiplexer P601 W69 73 F Refer to Top Cables All Cables All Options S N Prefixes 6021 on page 6 28 W181 SR N5245 20178 1 Cable assy RF FP port 1 CPLR THRU to A71 bias combiner port 1 W182 SR...

Page 445: ...cable A70 LFE J7 to A24 IF Multiplexer P404 W214 F 8120 5017 1 RF cable A70 LFE J7 to A24 IF Multiplexer P404 W215 F 8120 5017 1 RF cable A70 LFE J11 to A24 IF Multiplexer P804 N5247 20138 1 Dust cap...

Page 446: ...6 226 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 82 Bottom RF Cables 4 Port Option 405 S N Prefix 6021...

Page 447: ...23 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...

Page 448: ...6 228 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 83 Bottom Ribbon Cables and Wire Harnesses 4 Port Option 405 S N Prefix 6021...

Page 449: ...D 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 cab...

Page 450: ...6 230 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 84 Bottom Assemblies 4 Port Option 410 S N Prefix 6021...

Page 451: ...xer brick C W121 SR N5224 20018 1 A66 port 4 6 dB attenuator to A35 port 4 coupler W109b SR N5224 20027 1 A31 port 4 receiver coupler to A28 mixer brick R4 A69 3 dB pad W117 SR N5224 20026 1 A35 port...

Page 452: ...ators are only applicable to instruments with legacy 5087 7323 5087 6323 mixer bricks The new 5087 7417 mixer brick have the 3 dB pads inte grated into the mixer brick assembly Legacy A27 A28 mixer br...

Page 453: ...Keysight N5224B 25B Service Guide 6 233 Replaceable Parts Replaceable Parts Listings Figure 6 85 Bottom RF Cables 4 Port Option 410 S N Prefix 6021...

Page 454: ...xer brick 2 J52 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 se...

Page 455: ...Keysight N5224B 25B Service Guide 6 235 Replaceable Parts Replaceable Parts Listings Figure 6 86 Bottom Ribbon Cables and Wire Harnesses 4 Port Option 410 S N Prefix 6021...

Page 456: ...es and cables may be impacted by these changes The mixer block and 50 ohm pad changes do not impact PNAs with Options 210 410 But the HMA26 5 multiplier amplifier changes are potentially applicable to...

Page 457: ...ed to connector P1001 and Source 2 As a result of this change the IF multiplexer boards have had their P1001 connectors removed If your instrument contains a N5242 60031 cable remove it from your inst...

Page 458: ...238 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 87 Bottom Assemblies 4 Port Option 417 S N Prefix 6021 Bias Tees require Option 419 Ignore for Option 417...

Page 459: ...F 1 SOURCE OUT to A37 reference mixer switch W43 SR N5245 20009 1 A37 reference mixer switch to A27 mixer brick R1 W46 SR N5245 20115 1 REF 2 RCVR R2 IN to A27 mixer brick R2 W51 SR Refer to Top Cable...

Page 460: ...mixer brick top W210 F Refer to Top Cables All Cables All Options S N Prefixes 6021 on page 6 28 a SR semirigid coaxial cable F flexible coaxial cable b The N5245 20195 cable is used only with instrum...

Page 461: ...ht N5224B 25B Service Guide 6 241 Replaceable Parts Replaceable Parts Listings Figure 6 88 Bottom RF Cables 4 Port Option 417 Ports 1 and 2 S N Prefix 6021 Bias Tees Require Option 419 Ignore for Opti...

Page 462: ...019 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 2002...

Page 463: ...ht N5224B 25B Service Guide 6 243 Replaceable Parts Replaceable Parts Listings Figure 6 89 Bottom RF Cables 4 Port Option 417 Ports 3 and 4 S N Prefix 6021 Bias Tees Require Option 419 Ignore for Opti...

Page 464: ...to A47 port 3 receiver attenuator 16R N5245 60006 A23 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 A...

Page 465: ...N5224B 25B Service Guide 6 245 Replaceable Parts Replaceable Parts Listings Figure 6 90 Bottom Ribbon Cables Wire Harnesses 4 Port Option 417 S N Prefix 6021 Bias Tees Require Option 419 Ignore for Op...

Page 466: ...cables may be impacted by these changes The mixer block and 50 ohm pad changes do not impact PNAs with Options 210 410 But the HMA26 5 multiplier amplifier changes are potentially applicable to all Op...

Page 467: ...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 N...

Page 468: ...6 248 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 91 Bottom Assemblies 4 Port Option 419 S N Prefix 6021...

Page 469: ...5245 20115 1 REF 2 RCVR R2 IN to A27 mixer brick R2 W51 SR Refer to Top Cables All Cables All Options S N Prefixes 6021 on page 6 28 W56 SR N5245 20103 1 W55 to rear panel EXT TSET DRIVE RF OUT J6 W57...

Page 470: ...r to A27 mixer brick B W203b SR N5245 20195 1 RF cable A25 HMA26 5 top to A28 mixer brick top W210 F Refer to Top Cables All Cables All Options S N Prefixes 6021 on page 6 28 a SR semirigid coaxial ca...

Page 471: ...Keysight N5224B 25B Service Guide 6 251 Replaceable Parts Replaceable Parts Listings Figure 6 92 Bottom RF Cables 4 Port Option 419 Ports 1 and 2 S N Prefix 6021...

Page 472: ...r 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...

Page 473: ...r blocks installed A68 A69 3 dB attenuators are only applicable to instruments with legacy 5087 7323 5087 6323 mixer bricks The new 5087 7417 mixer brick have the 3 dB pads inte grated into the mixer...

Page 474: ...6 254 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 93 Bottom RF Cables 4 Port Option 419 Ports 3 and 4 S N Prefix 6021...

Page 475: ...motherboard J206 to A47 port 3 receiver attenuator 16R N5245 60006 A23 test set motherboard J547 to A39 port 3 source attenuator 2W P O bias tee A23 test set motherboard J541 to A42 port 1 bias tee 2W...

Page 476: ...o A23 test set motherboard J1 to A24 IF multiplexer board J1 25R E4410 60160 A18 system motherboard J13 to A23 test set motherboard J545 36R 8121 0834 Rear panel HANDLER I O to A23 test set motherboar...

Page 477: ...Keysight N5224B 25B Service Guide 6 257 Replaceable Parts Replaceable Parts Listings Figure 6 94 Bottom Ribbon Cables and Wire Harnesses 4 Port Option 419 S N Prefix 6021...

Page 478: ...cables may be impacted by these changes The mixer block and 50 ohm pad changes do not impact PNAs with Options 210 410 But the HMA26 5 multiplier amplifier changes are potentially applicable to all Op...

Page 479: ...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 lo...

Page 480: ...6 260 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 95 Bottom Assemblies 4 Port Option 420 S N Prefix 6021...

Page 481: ...R R2 IN to A27 mixer brick R2 W51 SR Refer to Top Cables All Cables All Options S N Prefixes 6021 on page 6 28 W56 SR N5245 20103 1 W55 to rear panel EXT TSET DRIVE RF OUT J6 W57 SR N5245 20012 1 A27...

Page 482: ...coaxial LFE Port 2 bias combiner RF IN to Port2 A70 LFE board W203b SR N5245 20195 1 RF cable A25 HMA26 5 top to A28 mixer brick top W211 F 8120 5014 1 RF cable A70 LFE J14 to A24 IF Multiplexer P4 W2...

Page 483: ...Keysight N5224B 25B Service Guide 6 263 Replaceable Parts Replaceable Parts Listings Figure 6 96 Bottom RF Cables 4 Port Option 420 Ports 1 and 2 S N Prefix 6021...

Page 484: ...ltiplexer 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 multi...

Page 485: ...28 N5247 20138 1 Dust cap A28 mixer brick termination a SR semirigid coaxial cable F flexible coaxial cable b Some PNA models have newer model A27 A28 mixer blocks installed A68 A69 3 dB attenuators a...

Page 486: ...6 266 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 97 Bottom RF Cables 4 Port Option 420 Ports 3 and 4 S N Prefix 6021...

Page 487: ...s 8121 0982 or N5242 60007 A23 test set motherboard J206 to A47 port 3 receiver attenuator 16R N5245 60006 A23 test set motherboard J547 to A39 port 3 source attenuator 2W N5240 60091 P O bias combine...

Page 488: ...5242 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 motherboard J545 36R 8121 0834 Rear panel...

Page 489: ...Keysight N5224B 25B Service Guide 6 269 Replaceable Parts Replaceable Parts Listings Figure 6 98 Bottom Ribbon Cables and Wire Harnesses 4 Port Option 420 S N Prefix 6021...

Page 490: ...6 270 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6...

Page 491: ...s on page 6 282 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...

Page 492: ...99 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 a...

Page 493: ...98 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 chassi...

Page 494: ...6 274 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 100 Fan Assemblies Side View All Options...

Page 495: ...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 Wi...

Page 496: ...6 276 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6 Figure 6 101 Top Hardware and Miscellaneous Parts Top View All Options...

Page 497: ...est 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 4 port P...

Page 498: ...E bias combiners port 2 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 Coupl...

Page 499: ...7 20110 and N5247 20146 cables are only used with a legacy HMA26 5 p n 5087 7765 If you are unclear which HMA26 5 assembly your PNA has installed refer to Chapter 7 Repairs and Figure 7 19 on page 7 4...

Page 500: ...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 si...

Page 501: ...Keysight N5224B 25B Service Guide 6 281 Replaceable Parts Replaceable Parts Listings Figure 6 103 Internal Hardware and Miscellaneous Parts All Options...

Page 502: ...foot N5247 60030 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 7906 4 Bottom foot N9020 40007 4 H...

Page 503: ...Keysight N5224B 25B Service Guide 6 283 Replaceable Parts Replaceable Parts Listings Figure 6 104 External Hardware and Miscellaneous Parts All Options...

Page 504: ...b site E8356 90001 Service Guide Not available in printed form Part number is for reference only Must be printed from the Keysight Web site N5225 90001 GPIB Cables GPIB Adapter GPIB cable 0 5 meter 1...

Page 505: ...alyzer 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 Opt...

Page 506: ...ack mount flanges rack support flanges and front panels 6010 3330 Titanium for use on cover 6010 3329 a For rack mount use you must replace factory installed ruggedized handles thick aluminum no trim...

Page 507: ...EEBackup exe Click on Save EEPROM Backup and then click on Backup TSMB Memory The firmware revision numbers for Win10 32 bit are A 13 30 xx through A 13 95 xx Windows 10 OS 64 bit C Program Files Key...

Page 508: ...5 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 Ta...

Page 509: ...re 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 plu...

Page 510: ...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 se...

Page 511: ...esizer DDS assembly s n prefixes 6021 only 26 5 GHz source boards Doubler boards Frequency reference board Signal processing ADC module SPAM board page 7 19 A18 System motherboard page 7 22 A19 Midpla...

Page 512: ...20022 N5245 20023 N5245 20101 and N5245 20150 cables are only used with a legacy HMA26 5 p n 5087 7765 If you are unclear which HMA26 5 assembly your PNA has installed refer to Chapter 7 and Figure 7...

Page 513: ...r 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 r...

Page 514: ...7 8 Keysight N5224B 25B Service Guide Repair and Replacement Procedures Removing the Covers 7 Figure 7 1 Outer and Inner Cover Removal...

Page 515: ...mi rigid jumpers item from the front panel 4 With a T 10 TORX driver remove the 12 screws item from the sides of the frame 5 Remove the lower panel overlay 6 With a T 10 TORX remove the 2 screws 2 Por...

Page 516: ...7 10 Keysight N5224B 25B Service Guide Repair and Replacement Procedures Removing and Replacing the Front Panel Assembly 7 Figure 7 2 Front Panel Assembly Removal...

Page 517: ...1 Disconnect the power cord 2 Remove the front panel assembly Refer to Removing and Replacing the Front Panel Assembly on page 7 9 Removing the RPG Assembly 1 Remove the round knob RPG from the front...

Page 518: ...en controller board and front panel interface board 2 Raise the retaining clamps on the LCD display flat flex cable s two connectors item 15 3 Disconnect the flat flex cable from the touchscreen item...

Page 519: ...lat flex cable s two connectors item 15 4 Disconnect the flat flex cable from the touchscreen item 15 5 The LED driver board cable item 22 can be removed from the connection on the LCD Display 6 The L...

Page 520: ...d Replacing the A1 A3 and Other Front Panel Subassemblies 7 11 The touch screen can now be removed from the front panel assembly Note the orientation of the touch screen in the front panel assembly fo...

Page 521: ...15 Repair and Replacement Procedures Removing and Replacing the A1 A3 and Other Front Panel Subassemblies Figure 7 4 A3 Display Assembly with LCD Display Cables Figure 7 5 Remove LCD Cable LCD to LED...

Page 522: ...and Replacement Procedures Removing and Replacing the A1 A3 and Other Front Panel Subassemblies 7 Figure 7 6 Remove LCD Mounting Plate to LCD Display LCD Display Cable Figure 7 7 Removing the Flat Fl...

Page 523: ...Service Guide 7 17 Repair and Replacement Procedures Removing and Replacing the A1 A3 and Other Front Panel Subassemblies Figure 7 8 Power Keypad to Power Button Board Figure 7 9 Remove Speaker Assemb...

Page 524: ...ing and Replacing the A1 A3 and Other Front Panel Subassemblies 7 Replacement Procedure 1 Reverse the order of the removal procedure 2 Perform the post repair adjustments verifications and performance...

Page 525: ...rds item b A5 source board only on the top side of the analyzer disconnect all visible semirigid cables from the A4 A7 and A8 boards c On the top side of the analyzer remove two screws item one at eac...

Page 526: ...the bottom of the board before reinstalling it If replacing a doubler board make sure the new board has loads connected to the same ports as were used on the old board This may require moving a load...

Page 527: ...3 N5245 20022 N5245 20023 N5245 20101 and N5245 20150 cables are only used with a legacy HMA26 5 p n 5087 7765 If you are unclear which HMA26 5 assembly your PNA has installed refer to Chapter 7 and F...

Page 528: ...eplacing the A20 Power Supply Assembly on page 7 27 5 Remove the A21 CPU Refer to Removing and Replacing the A21 CPU Board Assembly on page 7 29 6 Disconnect the rear panel cables 7 Remove the threade...

Page 529: ...is up Remove two screws item from each side that secure the midplane bracket to the chassis inner panels Lift the midplane bracket out of the analyzer 17 Remove the three screws item that secure the...

Page 530: ...20022 N5245 20023 N5245 20101 and N5245 20150 cables are only used with a legacy HMA26 5 p n 5087 7765 If you are unclear which HMA26 5 assembly your PNA has installed refer to Chapter 7 and Figure 7...

Page 531: ...s 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...

Page 532: ...7 26 Keysight N5224B 25B Service Guide Repair and Replacement Procedures Removing and Replacing the A19 Midplane Board 7 Figure 7 12 A19 Midplane Board Removal...

Page 533: ...efer to Removing the Covers on page 7 7 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...

Page 534: ...7 28 Keysight N5224B 25B Service Guide Repair and Replacement Procedures Removing and Replacing the A20 Power Supply Assembly 7 Figure 7 13 A20 Power Supply Assembly Removal...

Page 535: ...he 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 th...

Page 536: ...7 30 Keysight N5224B 25B Service Guide Repair and Replacement Procedures Removing and Replacing the A21 CPU Board Assembly 7 Figure 7 14 A21 CPU Board Assembly Removal...

Page 537: ...Refer to Removing the Covers on page 7 7 3 Remove the A20 power supply assembly Refer to Removing and Replacing the A20 Power Supply Assembly on page 7 27 4 Remove the A21 CPU board assembly Refer to...

Page 538: ...7 32 Keysight N5224B 25B Service Guide Repair and Replacement Procedures Removing and Replacing the A22 GPIB Board 7 Figure 7 15 A22 GPIB Board Removal...

Page 539: ...rom the A23 test set motherboard Before replacing the A23 test set motherboard if possible Run EEBackup exe using the directory for your Windows operating system Windows 7 OS C Program Files x86 Agile...

Page 540: ...ward the front of the instrument until the rear panel BNC connectors are free of the rear panel then lift the motherboard and remove it from the analyzer Replacement Procedure 1 Reverse the order of t...

Page 541: ...20022 N5245 20023 N5245 20101 and N5245 20150 cables are only used with a legacy HMA26 5 p n 5087 7765 If you are unclear which HMA26 5 assembly your PNA has installed refer to Chapter 7 and Figure 7...

Page 542: ...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 co...

Page 543: ...20022 N5245 20023 N5245 20101 and N5245 20150 cables are only used with a legacy HMA26 5 p n 5087 7765 If you are unclear which HMA26 5 assembly your PNA has installed refer to Chapter 7 and Figure 7...

Page 544: ...d 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 RF cable connectors to 10 in lbs 2 Pe...

Page 545: ...20023 N5245 20101 and N5245 20150 cables are only used with a legacy HMA26 5 p n 5087 7765 If you are unclear which HMA26 5 assembly your PNA has installed refer to Chapter 7 and Figure 7 19 on page 4...

Page 546: ...NA models using the legacy HMA26 5 part number 5087 7765 If your PNA has the newer HMA26 5 part number N5240 60101 installed you may discard these parts A26 splitter 5067 4086 W52 N5245 20013 W53 N524...

Page 547: ...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 the post repair adjustments verificatio...

Page 548: ...5 20023 N5245 20101 and N5245 20150 cables are only used with a legacy HMA26 5 p n 5087 7765 If you are unclear which HMA26 5 assembly your PNA has installed refer to Chapter 7 and Figure 7 19 on page...

Page 549: ...ay flexible RF cables item to be disconnected 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 1 Some PNA models have newer...

Page 550: ...shown that fasten each mixer brick to the mixer brick mounting block Replacement Procedure 1 Reverse the order of the removal procedure If replacing the A28 mixer brick remember to move the dust cap...

Page 551: ...20022 N5245 20023 N5245 20101 and N5245 20150 cables are only used with a legacy HMA26 5 p n 5087 7765 If you are unclear which HMA26 5 assembly your PNA has installed refer to Chapter 7 and Figure 7...

Page 552: ...ove 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 rec...

Page 553: ...86 and N5245 20013 N5245 20022 N5245 20023 N5245 20101 and N5245 20150 cables are only used with a legacy HMA26 5 p n 5087 7765 If you are unclear which HMA26 5 assembly your PNA has installed refer t...

Page 554: ...ecessary 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 wa...

Page 555: ...Test Port Couplers Removal1 1 The A26 splitter 5067 4086 and N5245 20013 N5245 20022 N5245 20023 N5245 20101 and N5245 20150 cables are only used with a legacy HMA26 5 p n 5087 7765 If you are unclear...

Page 556: ...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...

Page 557: ...Keysight N5224B 25B Service Guide 7 51 Repair and Replacement Procedures Removing and Replacing the A37 Reference Mixer Switch Figure 7 24 A37 Reference Mixer Switch Removal...

Page 558: ...oved It may be necessary to remove additional cables to remove the attenuator bracket If so note the location and orientation of each for reinstallation later 6 Remove three screws item that secure A4...

Page 559: ...ving and Replacing the A38 A41 Source Attenuators and the A46 A49 Receiver Attenuators 2 Perform the post repair adjustments verifications and performance tests that pertain to this removal procedure...

Page 560: ...022 N5245 20023 N5245 20101 and N5245 20150 cables are only used with a legacy HMA26 5 p n 5087 7765 If you are unclear which HMA26 5 assembly your PNA has installed refer to Chapter 7 and Figure 7 19...

Page 561: ...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 disconnecte...

Page 562: ...0022 N5245 20023 N5245 20101 and N5245 20150 cables are only used with a legacy HMA26 5 p n 5087 7765 If you are unclear which HMA26 5 assembly your PNA has installed refer to Chapter 7 and Figure 7 1...

Page 563: ...eserve Obsolete Reference only If installing an SSD for Windows 7 for more information on the N8984A SSD refer to the Windows 7 Operating System Upgrade Kit Installation Note available online at https...

Page 564: ...id State Drive SSD 7 Figure 7 27 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...

Page 565: ...er torque to 21 in lb or 2 38 N m 5 16 inch open end torque wrench torque to 10 in lb or 1 13 N m ESD grounding wrist strap Removal Procedure Refer to Figure 7 28 on page 7 60 Figure 7 32 on page 7 64...

Page 566: ...Procedures Removing and Replacing the A70 or A75 Low Frequency Extension LFE Board 7 5 Disconnect the 8121 2919 and N5245 60005 ribbon cables Refer to Figure 7 28 on page 7 60 Figure 7 28 Disconnect R...

Page 567: ...A70 or A75 Low Frequency Extension LFE Board 6 Disconnect ALL gray flexible RF cables item through from the A70 LFE board Refer to Figure 7 29 on page 7 61 Figure 7 29 A70 LFE Board Remove Cables 8120...

Page 568: ...ort 1 bias combiner RF IN cable from the Port1 connector on the LFE board Refer to Figure 7 30 on page 7 62 Figure 7 30 Remove A71 bias combiner cable N5240 60097 from Port1 connector on the A70 LFE b...

Page 569: ...on LFE Board 9 Remove A74 port 2 bias combiner RF IN cable to Port2 connector on the LFE board Figure 7 31 A74 port 2 bias combiner cable N5240 60097 from Port2 connector on the A70 LFE board 10 A70 L...

Page 570: ...12 Remove the two screws from the LFE board item Save for reuse Refer to Figure 7 32 on page 7 64 13 Lift the LFE board N5291 60001 and remove it from the analyzer Refer to Figure 7 32 on page 7 64 R...

Page 571: ...yzer bottom side up 4 Disconnect the two semirigid cables item and from the bias tee combiner to be removed Refer to Figure 7 33 on page 7 67 5 Remove two screws from the bias tee combiner and bracket...

Page 572: ...ue the bias combiner with bracket assembly to the chassis screws x2 to 9 in lbs 2 As shown in Figure 7 34 on page 7 67 position the bias tees on the attenuator brackets as indicated 3 Perform the post...

Page 573: ...Combiners Figure 7 33 A71 A74 Bias Tee Combiners and Cables Removal N5222B Option 420 Shown All Other PNA LFE Options are Similar Figure 7 34 Remove Bias Combiner Bracket Assemblies from the Chassis N...

Page 574: ...and Replacement Procedures Removing and Replacing the A71 A74 Bias Tee Combiners 7 Figure 7 35 Remove DC Bias Cable from Bias Combiner N5240 60091 Figure 7 36 Remove Bias Combiner Cables and Clamps 5...

Page 575: ...Keysight N5224B 25B Service Guide 7 69 Repair and Replacement Procedures Removing and Replacing the A71 A74 Bias Tee Combiners Figure 7 37 Mark Bias Combiner With a Permanent Marker...

Page 576: ...g the Covers on page 7 7 3 Remove the A20 power supply assembly Refer to Removing and Replacing the A20 Power Supply Assembly on page 7 27 4 Remove the A21 CPU board assembly Refer to Removing and Rep...

Page 577: ...Keysight N5224B 25B Service Guide 7 71 Repair and Replacement Procedures Removing and Replacing the Rear Panel Figure 7 38 Rear Panel Removal...

Page 578: ...gure 7 23 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 48 3 Remove two screws item from the L...

Page 579: ...Keysight N5224B 25B Service Guide 7 73 Repair and Replacement Procedures Removing and Replacing the Front Panel LED Boards Figure 7 39 Front Panel LED Boards Removal...

Page 580: ...entire power supply just the power supply bracket Refer to Removing and Replacing the A20 Power Supply Assembly on page 7 27 5 Remove screws item five on the right side and seven on the left side tha...

Page 581: ...Removing and Replacing the Fans Replacement Procedure 1 Reverse the order of the removal procedure 2 Perform the post repair adjustments verifications and performance tests that pertain to this remov...

Page 582: ...te Drive SSD on page 7 57 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...

Page 583: ...Keysight N5224B 25B Service Guide 7 77 Repair and Replacement Procedures Removing and Replacing the Lithium Battery Figure 7 41 Lithium Battery Removal...

Page 584: ...not present an electric shock hazard IMPORTANT Before you begin any testing on a System or instrument always inspect the connectors on the instrument the calibration kit cables and adapters IMPORTANT...

Page 585: ...Source Power Accuracy Test Source Maximum Power Output Test Source Power Linearity Test The Operator s Check A7 A8 A12 and A13 Doubler boards Source Adjustment IF Gain Adjustment Receiver Characteriz...

Page 586: ...uency Accuracy Test Source Power Accuracy Test Source Maximum Power Output Test Source Power Linearity Test The Operator s Check A15 13 5 GHz LO synthesizer board EE Default Adjustment Synth LO only S...

Page 587: ...2 4 5 7A Installed Frequency Accuracy Test Source Power Accuracy Test Source Maximum Power Output Test Source Power Linearity Test The Operator s Check A16 SPAM board Source Adjustment IF Gain Adjust...

Page 588: ...stment Receiver Characterization Receiver Adjustment IF Response Adjustment Available Only with Option S93093 4A and or S93900 1 2 4 5 7A Installed The Operator s Check A25 HMA26 5 EE Default Adjustme...

Page 589: ...Response Adjustment Available Only with Option S93093 4A and or S93900 1 2 4 5 7A Installed Source Maximum Power Output Test Calibration Coefficients Test A37 reference mixer switch No adjustment nee...

Page 590: ...93093 4A and or S93900 1 2 4 5 7A Installed LFE Receiver Adjustment Available with Option 205 220 405 420 and 425 Source Maximum Power Output Test Source Power Accuracy Test Calibration Coefficients T...

Page 591: ...ust be powered up and operating to perform this procedure The Network Analyzer program must be running A keyboard and mouse must be connected to the network analyzer 1 Click Utility System Service Dia...

Page 592: ...here generate new correction constants The analyzer must have a backup of this new data in case any of the data becomes corrupted To store the backup data perform these steps Navigate to the EEPROM Ba...

Page 593: ...r repair lost or damaged option data install or change a serial number page 8 97 Firmware Upgrades How to check your analyzer s current firmware revision and where to locate firmware upgrades page 8 9...

Page 594: ...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...

Page 595: ...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 por...

Page 596: ...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...

Page 597: ...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 matc...

Page 598: ...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 ter...

Page 599: ...re the displayed measurement trace to previously measured data or to the uncorrected performance specifications listed in Table 8 1 on page 8 94 6 Print numerical data or print a plot of the measureme...

Page 600: ...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 d...

Page 601: ...F 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...

Page 602: ...ted 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 load...

Page 603: ...ftware Entitlement Certificate If you have received an Software Entitlement Certificate follow the instructions on the certificate under HOW TO USE THIS CERTIFICATE to obtain license key file s for th...

Page 604: ...on 1 Start the Keysight License Manager Refer to Accessing the Keysight License Manager on page 8 97 2 In the Keysight License Manager window that opens in the left hand column press Local host Local...

Page 605: ...Internet there are two methods available for checking the availability of and downloading new firmware Download directly from https www keysight com us en lib software detail instrument firmwar e soft...

Page 606: ...t 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...

Page 607: ...source signals and receive clean test signals Storing Correction Constants After performing any adjustment listed on page 3 44 in this manual store the correction constants to a backup file on the ana...

Page 608: ...8 102 Keysight N5224B 25B Service Guide General Purpose Maintenance Procedures Correction Constants 8...

Page 609: ...nused 1 E100 A15 LO Synth rev 4 N5230 60002 D Synth Power Cal A15 LO Synth rev 5 N5242 60150 166 F A15 LO Synth rev 6 N5240 60074 76 G H 2 E180 A23 TSMB N5245 60157 F HW Opt s Instr SN uCkt SN s MA26...

Page 610: ...7 Noise Figurea N5245 60124 B Unused 19 EA00 A7 50 GHz Doubler 5087 7318 assembly 5067 1335 bias board A Unused A7 50 GHz Doubler 5087 7349 assembly 5067 1361 bias board B C A7 50 GHz Doubler 5087 734...

Page 611: ...as board B C A12 50 GHz Doubler 5087 7349 assembly 5067 6418 bias board D 22 EB80 A13 50 GHz Doubler 5087 7318 assembly 5067 1335 bias board A Unused A13 50 GHz Doubler 5087 7349 assembly 5067 1361 bi...

Page 612: ...Appendix 4 Service Guide EEPROM Address Assignments and Location N5224 5A B PNA and N5244 5A B PNA X Instruments...

Page 613: ...Installation Note Xxxxx xxxxx 3...

Page 614: ...This information is subject to change without notice Keysight Technologies 2011 2022 Edition 1 July 2022 N5225 90026 www keysight com...

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