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308 Keysight N9010B EXA Signal Analyzer Service Guide

L.O. Synthesizer/Reference Troubleshooting

A14 L.O. Synthesizer Troubleshooting

— The analyzer marker should read 4800 MHz at +4.5 dBm ± 2 dB as shown in

Figure 8-3.

Figure 8-3 4800 MHz Wide Span

Main Page

Table of Contents5
Overview13
What You will Find in this Chapter13
Keysight EXA Signal Analyzer Overview14
Instrument Option Descriptions15
Signal Analyzer Accessories16
Manual Set on CD/DVD16
50 Ohm Load17
50 Ohm/75 Ohm Minimum Loss Pad17
AC Probe17
AC Probe (Low Frequency)17
Broadband Preamplifiers and Power Amplifiers17
RF and Transient Limiters17
Power Splitters18
Static Safe Accessories18
Before You Start Troubleshooting19
Lithium Battery Disposal20
ESD Information21
Protection from Electrostatic Discharge21
Handling of Electronic Components and ESD22
Test Equipment Usage and ESD22
For Additional Information about ESD22
Service Equipment You will Need23
Calibration Application Software23
Front End Controller Troubleshooting Kit24
USB Keyboard and Mouse25
USB Storage Device25
Required Test Equipment List26
After an Instrument Repair38
Contacting Keysight Technologies39
Instrument Serial Numbers42
How to Return Your Instrument for Service43
Service Order Number43
Original Packaging43
Other Packaging44
Boot up and Initialization Troubleshooting45
What You will Find in this Chapter45
Check the Basics46
Instrument Boot up Process47
Typical Instrument Boot-Up Process Flow48
Potential Problems During Boot Process51
Yellow Standby LED Does Not Illuminate51
Green Power on LED Does Not Illuminate53
Fan(S) Are Not Operating55
No Keysight Splash Screen Displayed57
Instrument Hangs at the Keysight Splash Screen58
PCI Enumeration Error58
Instrument Cannot Completely Load or Run the Operating System59
Troubleshooting a Blank Display59
Verify Video Signal Path Integrity60
Video Controller / Touch Screen Display Troubleshooting60
Initializations DID Not Complete60
Fails an Initial Alignment61
Signal Level Verification66
Signal Level Problem with Input Frequencies < 3.6 Ghz66
Signal Level Problem with Input Frequencies > 3.6 Ghz67
Instrument Messages69
Introduction69
Event Vs. Condition Messages69
Event and Condition Categories70
Event Message Format71
Event Queues72
Advisory Messages74
Event Messages80
800, Operation Complete Event81
700, Request Control Event81
600, User Request Event81
500, Power on Event81
-400 to -499, Query Errors81
-300 to -399, Device-Specific Errors82
-221 Settings Conflict Errors85
-200 to -299, Execution Errors97
-100 to -199, Command Errors108
Error110
Condition Messages111
Condition Errors 1 to 99, Calibration111
Condition Errors 101 to 199, Measurement Integrity116
Condition Errors 201 to 299, Signal Integrity119
Condition Errors 301 to 399, Uncalibrated Integrity123
Condition Errors 401 to 499, Power127
Condition Errors 501 to 599, Frequency127
Condition Errors 601 to 699, Error Summaries129
Condition Errors 701 to 799, Operation130
Condition Errors 801 to 899, Temperature131
What You will Find in this Chapter133
RF Section Troubleshooting (Rf/Microwave Analyzers)134
RF Section Description134
Purpose134
RF Section Theory of Operation138
Troubleshooting142
Quick Check to Verify the Low Band Signal Path142
Troubleshooting a Low Band Problem146
Quick Check to Verify High Band RF Path #1169
Troubleshooting a High Band Problem173
High Band Preamp (Option P07, P13, P26)198
High Band Mixing Equations198
Microwave Preselector Bypass (Option MPB)199
RF Section Troubleshooting (Millimeter-Wave Analyzers)201
What You will Find in this Chapter201
RF Section Description202
A9 Input Attenuator a205
A10 Input Attenuator B205
A11 Low Band Switch205
A12 YTF Preselector205
A13 RF Front End Assembly (Options 532, 544)206
Troubleshooting208
Quick Check to Verify the Low Band Signal Path208
Troubleshooting a Low Band Problem211
Quick Check to Verify High Band RF Path218
Troubleshooting a High Band Problem223
Front End Control Troubleshooting231
What You will Find in this Chapter231
A15 Front End Control Description232
Purpose232
A15 Front End Control Assembly Troubleshooting238
Verifying Input Attenuator A, Input Attenuator B, Low Band Switch Logic and Power Supplies239
Preselector Tune Output249
Verifying Microwave Preselector Bypass Switch (Option MPB)250
Oscilloscope Test250
Verifying aux if Out, Rear Panel (Option CR3, CRP Only)255
Standard Analyzer255
Verifying Option CR3256
Verifying Option CRP257
Analog/Digital if Troubleshooting259
What You will Find in this Chapter259
25 Mhz BW if Section261
A2 Analog I.F. Assembly Description261
A2 Analog I.F. Assembly Theory of Operation262
A2 Analog I.F. Troubleshooting265
A3 Digital I.F. Assembly Description272
A3 Digital I.F. Assembly Theory of Operation273
A3 Digital I.F. Troubleshooting275
40 Mhz BW if Section280
A2 Analog if Assembly Description280
A2 Analog if Assembly Theory of Operation281
A2 Analog if Troubleshooting284
A3 Digital if Assembly Description291
A3 Digital if Assembly Theory of Operation292
A3 Digital if Troubleshooting294
L.O. Synthesizer/Reference Troubleshooting303
What You will Find in this Chapter303
A14 L.O. Synthesizer Assembly Description304
Purpose304
A14 L.O. Synthesizer Theory of Operation305
Brief Description of the Major Blocks305
A14 L.O. Synthesizer Troubleshooting306
Verifying the 4800 Mhz Input Power & Frequency Stability307
Verifying the 1St L.O. Output Power310
A16 Reference Assembly Description314
Purpose314
A16 Reference Assembly Troubleshooting316
Diagnostic Leds323
Cpu/Disk Drive Troubleshooting325
What You will Find in this Chapter325
A4 Processor Description326
Disk Drive326
A4A1 Disk Drive Interface Board326
Front Panel Interface326
Graphics Controller326
Power Supply Control326
Rear Panel Connectivity327
System Memory328
System Processor328
Processor Battery328
SD Memory Card Slot328
A4 Processor Assembly Troubleshooting329
Boot-Up or Initialization Problems329
BIOS Settings329
A5 Disk Drive Description330
Drive Partitioning331
Instrument Image Recovery System332
A5 Disk Drive Troubleshooting333
Troubleshooting Software Related Issues333
Reloading the Instrument Application Software333
Disk Drive Recovery Process334
What You will Find in this Chapter337
A6 Power Supply Description338
Purpose338
Power Supply Theory of Operation339
A6 Power Supply Basic Troubleshooting344
(Cover On)344
A7 Midplane Description346
Purpose346
A7 Midplane Assembly Troubleshooting349
11 Front Panel/Motherboard Troubleshooting351
What You will Find in this Chapter351
A8 Motherboard Description352
Purpose352
A8 Motherboard Troubleshooting353
A1 Front Panel Assembly354
A1A2 Front Panel Interface Board354
A1A3 Lcd354
What You will Find in this Chapter355
Block Diagrams356
RF Lowband Path Block Diagram357
RF Highband Path #1 Block Diagram358
RF Highband Path #2 Block Diagram359
Option 532, 544 Mmw RF (Low Freq) Block Diagram360
Option 532, 544 Mmw RF (Highband Path #1) Block Diagram361
Option 532, 544 Mmw RF (Highband Path #2) Block Diagram362
Option 532, 544 Mmw RF (Highband Path #3) Block Diagram363
Reference and Synthesizer Block Diagram364
25 Mhz Bandwidth I.F. System Block Diagram365
40 Mhz Bandwidth I.F. System Block Diagram366
EXA Computer Block Diagram367
13 Service and Diagnostics Menus369
Overview369
Controlling Access370
Secure Service Access371
Service Key Descriptions375
Timebase375
Alignments376
Corrections380
Band Lock382
LO Band Lock383
LO Control384
Front Panel Key Test385
Front Panel Display Test385
Multitouch Test385
14 Replaceable Parts387
What You will Find in this Chapter387
How to Order Parts389
Replaceable Parts390
Hardware403
15 Assembly Replacement Procedures441
What You will Find in this Chapter441
Before Starting442
Safety442
Tools You will Need443
Adjustments Tests after an Instrument Repair443
Major Assembly Locations444
Instrument Outer Case445
Standard Instrument445
Option PRC447
Top Brace450
Removal450
Replacement450
RF Area (Option 503, 507, 513, 526)451
Low Band Switch - Standard Rf/Microwave Instruments454
Low Band Switch and Coaxial Switches - Rf/Microwave Instruments with Options DP2, MPB, B40457
Attenuators - Rf/Microwave Instruments473
YTF Preselector - Rf/Microwave Instruments475
RF Area (Option 532, 544)478
Low Band Switch481
Low Band Switch and Coaxial Switch485
Options DP2, MPB, B40485
Attenuators488
YTF Preselector490
RF Front End Assembly (Option 503, 507, 513, 526)493
Removal493
Replacement494
RF Front End Assembly (Options 532, 544)495
Removal495
Replacement496
Front End Control Assembly497
Removal497
Replacement499
L.O. Synthesizer Assembly500
Removal500
Replacement500
Rear Panel501
Removal501
Replacement501
Reference Assembly502
Removal502
Replacement504
Power Supply Assembly505
Removal505
Replacement506
CPU Assembly507
Removal507
Replacement508
A5 Solid State Drive509
Disk Drive509
A4A1 CPU Memory Card511
Disk Drive Interconnect511
Analog I.F. (Aif)/Digital I.F. (DIF) Assembly514
Removal514
Separate AIF/DIF Assembly517
Replacement518
Midplane Assembly519
Removal519
Replacement521
Motherboard Assembly522
Removal522
Replacement525
Fan Assembly527
Removal527
Replacement529
Input Connector Assembly530
Removal530
Replacement531
Front Frame Assembly532
Removal532
Replacement533
Bail Handle Removal (Option PRC)534
Front Frame Assembly Components535
Display Assembly541
Post-Repair Procedures545
What You will Find in this Chapter545
Before Starting545
Post-Repair Procedures546
Additional Tasks550
17 Functional Tests561
Functional Test561
Performance Verification561
Before Performing a Functional Test562
Test Equipment563
Displayed Average Noise Level (DANL)566
Procedure566
Frequency Readout Accuracy569
Procedure570
Second Harmonic Distortion (SHD)572
Procedure573
Amplitude Accuracy at 50 Mhz575
Procedure576
Testing Preamp Option (P03, P07, P13, P26, P32, P44)578
Frequency Response (Flatness)579
Procedure580
Frequency Response (Flatness), Preamp on583
Procedure584
Scale Fidelity588
Procedure589
18 Instrument Software591
What You will Find in this Chapter591
Instrument Software Overview592
Software Licensing593
Software Updates594
Instrument Measurement Application Software594
89601 VSA Software594

Keysight N9010B - Page 308

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