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Measuring Instruments
N9038A
Service Guide
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514
Keysig
ht N9038A MXE Service Guide
Replaceable Parts
Har
dware
Figure 17-18
Cable Hold Downs
Item
Description
Part Number
1
MP57
Cable Hold Down 1 (158 mm)
5023-1397
2
MP58
Cable Hold Down 2 (48 mm)
5023-1379
3S
c
r
e
w
M3 X0.5 (8 mm)
0515-0372
494
496
Table of Contents
Main Page
1. Overview
5
Table of Contents
5
1 Overview
17
What You will Find in this Chapter
17
Service Manual Revision History
18
Keysight MXE EMI Receiver Overview
20
Virus Information
20
Instrument Option Descriptions
21
Before You Start Troubleshooting
23
General Safety Considerations
24
ESD Information
26
Protection from Electrostatic Discharge
26
Handling of Electronic Components and ESD
27
Test Equipment Usage and ESD
27
For Additional Information about ESD
27
Service Equipment You will Need
28
Tools You will Need
28
Calibration Application Software
29
Front End Controller Troubleshooting Kit
30
Type-M Troubleshooting Cable
30
After an Instrument Repair
31
Contacting Keysight Technologies
31
Instrument Serial Numbers
34
How to Return Your Instrument for Service
35
Service Order Number
35
Original Packaging
35
Other Packaging
36
2 Boot up and Initialization
37
What You will Find in this Chapter
37
Check the Basics
38
MXE Instrument Boot up Process
39
Typical Instrument Boot-Up Process Flow
40
Potential Problems During Boot Process
43
Yellow Standby LED Does Not Illuminate
43
Green Power on LED Does Not Illuminate
45
Fan(S) Are Not Operating
49
No Keysight Splash Screen Displayed
52
Instrument Hangs at the Keysight Splash Screen
53
Instrument Cannot Completely Load or Run the Operating System
54
Troubleshooting a Blank Display
54
Verify LCD Backlight Functionality
55
Verify Video Signal Path Integrity
58
Video Controller / LCD Troubleshooting
58
Initializations DID Not Complete
59
Fails an Initial Alignment
59
Signal Level Verification
63
3 Instrument Messages
67
Introduction
67
Event Vs. Condition Messages
67
Event and Condition Categories
68
Event Message Format
70
Event Queues
70
Advisory Messages
72
Event Messages
77
800, Operation Complete Event
78
700, Request Control Event
78
600, User Request Event
78
500, Power on Event
78
-400 to -499, Query Errors
78
-300 to -399, Device-Specific Errors
79
-221 Settings Conflict Errors
82
-200 to -299, Execution Errors
95
-100 to -199, Command Errors
105
Error
107
Condition Messages
108
Condition Errors 1 to 99, Calibration
108
Condition Errors 101 to 199, Measurement Integrity
113
Condition Errors 201 to 299, Signal Integrity
116
Condition Errors 301 to 399, Uncalibrated Integrity
120
Condition Errors 401 to 499, Power
124
Condition Errors 501 to 599, Frequency
125
Condition Errors 601 to 699, Error Summaries
126
Condition Errors 701 to 799, Operation
127
Condition Errors 801 to 899, Temperature
129
4 Input Selection & Level Control
131
What You will Find in this Chapter
131
Input Selection & Level Control Section Purpose
132
Input Selection & Level Control Section Description
132
Input Selection & Level Control Assembly Descriptions
133
A9 Input Attenuator a
133
A10 Attenuator B
133
A23 Limiter Assembly
134
SW1 Cal Switch
135
SW2 Transfer Switch
135
Input Selection & Level Control Section Troubleshooting
136
A9 Attenuator a
136
A10 Attenuator B
136
A10 Attenuator B
145
A23 Limiter Assembly
149
SW1 Cal Switch
155
SW2 Transfer Switch
159
5 Rf Preselector Section
163
5 RF Preselector Section
164
RF Preselector Section Purpose
164
RF Preselector Section Description
164
RF Preselector Section Signal Paths
164
RF Preselector Section Assembly Descriptions
166
A21 RF Preselector Input Assembly
166
A22 Radiated Filter Assembly
170
A24 Conducted Filter Assembly
173
RF Preselector Section Troubleshooting
175
A21 RF Preselector Input Assembly
175
A22 Radiated Filter Assembly
175
A24 Conducted Filter Assembly
175
A22 Radiated Filter Assembly
194
A24 Conducted Filter Assembly
204
6 Rf Downconverter Section
217
Default Chapter
217
What You will Find in this Chapter
217
RF Downconverter Section Description
218
RF Section Purpose
218
RF Section Signal Paths
220
RF Section Assembly Descriptions
225
RF Downconverter Section Troubleshooting
233
A11 RF Switch / High Band Preamp
233
A12 YTF Preselector
242
A13 RF Front End Assembly
252
7 L.O. Synthesizer
261
What You will Find in this Chapter
261
A14 L.O. Synthesizer Assembly Description
262
A14 L.O. Synthesizer Purpose
262
A14 L.O. Synthesizer Description
262
A14 L.O. Synthesizer Assembly Connections
263
A14 L.O. Synthesizer Assembly Troubleshooting
264
Assembly Initialization
264
Assembly Status Leds
265
Frequency and Amplitude of the 1St lo Output
266
8 Front End Control
269
What You will Find in this Chapter
269
A15 Front End Control Description
270
A15 Front End Control Purpose
270
A15 Front End Control Assembly Description
270
A15 Front End Control Assembly Connections
271
A15 Front End Control Assembly Troubleshooting
274
Assembly Initialization
274
Assembly Control Verification - (Option 503, 508, & 526 Only)
275
A9 Input Attenuator a Control - (Option 503, 508, & 526 Only)
277
A10 Input Attenuator B Control - (Option 503, 508, & 526 Only)
281
A11 RF Switch / High Band Preamp Control - (Option 503, 508, & 526 Only)
284
A12 YTF Preselector Control - (Option 508 & 526 Only)
288
A12 YTF Preselector Alignment
291
A13 RF Front End Assembly Control - (Option 503, 508, & 526 Only)
292
IF Switching
297
AUX if Output (Option CR3)
302
9 Reference Assembly
305
A16 Reference Assembly Description
306
A16 Reference Assembly Purpose
306
A16 Reference Assembly Description
307
A16 Reference Assembly Connections
307
A16 Reference Assembly Troubleshooting
309
Assembly Initialization
309
Assembly Status Leds
309
Assembly Output Signal Frequency & Amplitude Verification
311
Digital if Reference (10 Mhz)
312
50 Mhz Calibrator
313
E-Cal Reference
314
Digital if Reference (100 Mhz)
315
3Rd lo
316
4.8 Ghz Calibrator
317
1St lo Reference
318
2Nd lo (Low Band)
319
Wideband if Reference
320
10 Analog & Digital if
321
What You will Find in this Chapter
321
A2 Analog if Assembly Description
322
A2 Analog if Assembly Purpose
322
Overall A2 Analog if Assembly Resolution Bandwidth
324
A2 Analog if Assembly Connections
325
A2 Analog I.F. Troubleshooting
326
Assembly Initialization
326
Signal Path Verification
326
A2 Analog if Filter Path Switching
327
A2 Analog if Filter Path Passband Shape
330
A2 Analog if 25 Mhz Filter Path (Option B25 Only)
335
A3 Digital I.F. Assembly Description
337
A3 Digital if Assembly Purpose
337
A3 Digital if Assembly Description
338
A3 Digital if Assembly Connections
339
A3 Digital I.F. Troubleshooting
342
Assembly Initialization
342
Assembly Functionality Verification
343
22.5 Mhz if Signal Processing
344
10 Mhz Reference Output
345
Trigger Outputs
346
Trigger Inputs
347
Analog Output (Option YAS Only)
348
Noise Source Output (Optional N9069A Software Required)
350
Smart Noise Source Interface (Optional N9069A Software Required)
351
11 CPU & Disk Drive
355
Default Chapter
355
What You will Find in this Chapter
355
A4 Processor Assembly Description
356
Disk Drive
356
A4A1 Disk Drive Interface Board
356
Front Panel Interface
356
Graphics Controller
356
Power Supply Control
357
Rear Panel Connectivity
357
System Memory
358
System Processor
358
Processor Battery
358
SD Memory Card Slot
358
A4 Processor Board Assembly Troubleshooting
359
Boot-Up or Initialization Problems
359
BIOS Settings
359
A5 Disk Drive
360
Overview
361
Troubleshooting Software Related Issues
362
Reloading the Instrument Application Software
363
Disk Drive Recovery Process
364
Instrument Image Recovery System
364
Using the Instrument Recovery System
365
Replacing the Instrument Disk Drive
366
12 Power Supply & Midplane
367
What You will Find in this Chapter
367
A6 Power Supply Description
368
A6 Power Supply Purpose
368
A6 Power Supply Assembly Troubleshooting
371
Supply Voltages
371
Control Inputs
371
Status Outputs
371
A7 Midplane Board Assembly Description
373
A7 Midplane Assembly Purpose
373
A7 Midplane Assembly Description
373
A7 Midplane Assembly Connections
374
A7 Midplane Board Assembly Troubleshooting
375
Instrument Power Supply Leds and Test Points
375
Additional Power Supply Regulation
375
Instrument Secure Storage
375
Power Supply Dithering
375
13 Motherboard & Front Panel
379
What You will Find in this Chapter
379
A8 Motherboard Assembly Description
380
A8 Motherboard Assembly Purpose
380
A8 Motherboard Assembly Connections
380
A1 Front Panel Assembly
382
A1A2 Front Panel Interface Board
382
A1A3 Lcd
382
A1A4 Backlight Power Supply
382
A1A5 Front Panel Daughter Board
382
14 Optional Assemblies
383
What You will Find in this Chapter
383
A25 Wideband Analog if Assembly Description
384
A25 Wideband Analog if Assembly Purpose
384
A25 Wideband Analog if Assembly Troubleshooting
387
Assembly Initialization
387
Overall Wideband Signal Path Verification
388
2400 Mhz Reference Input Verification
389
Input Signal Level Verification
390
Input Switching Verification
391
A26 Wideband Digital if Assembly Description
393
A26 Wideband Digital if Assembly Purpose
393
A26 Wideband Digital if Assembly Connections
395
A26 Wideband Digital if Assembly Troubleshooting
396
Assembly Initialization
396
Internal Alignment Failures
397
Overall Wideband Signal Path Verification
397
A30 LISN Control Assembly Description
399
A30 LISN Control Assembly Purpose
399
A30 LISN Control Assembly Connections
399
A30 LISN Control Assembly Troubleshooting
401
Assembly Initialization
401
Option LSN License Key
401
Output Data Line Status Leds
402
Rear Panel AUX I/O Outputs
403
15 Block Diagrams
405
What You will Find in this Chapter
405
Block Diagrams
407
N9038A RF Input Option 503, 508, 526 Block Diagram
407
N9038A RF Input Option 544 Block Diagram
408
LO Synthesizer Block Diagram
428
Reference Block Diagram
429
MXE Computer Block Diagram
430
16 Service and Diagnostics Menus
432
Overview
432
Controlling Access
432
Secure Service Access
433
Service Menus
434
Service Key Descriptions
441
Service
441
Timebase
442
Corrections
443
Lock Functions
444
LO Control
445
Align
445
Diagnostics
448
RF Preselector
448
AUX I/O Control
454
Diagnostics Key Description
455
17 Replaceable Parts
456
What You will Find in this Chapter
456
How to Order Parts
457
Replaceable Parts
458
Hardware
476
18 Assembly Replacement Procedures
508
What You will Find in this Chapter
508
Before Starting
510
Safety
510
Tools You will Need
511
Adjustments Tests after an Instrument Repair
511
Major Assembly Locations
512
Instrument Outer Case
513
Removal
513
Replacement
514
Top Brace and Power Supply Bracket
515
Removal
515
Replacement
516
RF Area - Option 503, 508, & 526
517
Attenuators - Option 503, 508, & 526
518
RF Switch/High Band Preamp Assembly - Option 503, 508, & 526
521
YTF Preselector - Option 503, 508, & 526
525
Cal Switch and Transfer Switch - Option 503, 508, & 526
528
Attenuators - Option 544
538
RF Switch/High Band Preamp Assembly - Option 544
541
YTF Preselector - Option 544
544
Cal Switch and Transfer Switch - Option 544
547
RF Front End Assembly
551
Removal
551
Replacement
553
Limiter Assembly
554
Removal
554
Replacement
555
Front End Control Assembly
556
Removal
556
Replacement
557
LO Synthesizer Assembly
558
Removal
558
Replacement
559
Radiated Filter Assembly
560
Removal
560
Replacement
561
RF Preselector Input Assembly
562
Removal
562
Replacement
562
Conducted Filter Assembly
563
Removal
563
Replacement
563
LISN Control Assembly
564
Removal
564
Replacement
565
Wideband Analog if and Wideband Digital if Assemblies
566
Removal
566
Replacement
567
Reference Assembly
568
Removal
568
Replacement
569
Midplane Board Assembly
570
Removal
570
Replacement
571
Rear Panel
572
Removal
572
Replacement
573
Power Supply Assembly
574
Removal
574
Replacement
575
CPU Assembly
576
Removal
576
Replacement
576
Disk Drive
577
Drive Removal and Replacement
577
Disk Drive Interconnect
581
AIF/DIF Assembly
583
Removal
583
Separate AIF/DIF Assembly
585
Replacement
586
Motherboard Assembly
587
Removal
587
Replacement
591
W35 Removal
594
Fan Assembly
595
Removal
595
Replacement
598
Input Connector Assembly
599
RF Input 1 Connector
599
RF Input 2 Connector
601
Front Frame Assembly
603
Removal
603
Replacement
605
Front Frame Assembly Components - LED
606
Front Frame Assembly Components - CCFL Backlight
614
Input 2 LED Board
623
19 Post-Repair Procedures
624
What You will Find in this Chapter
624
Before Starting
624
Calibration Data Backup and Restore
628
20 Instrument Software
640
What You will Find in this Chapter
640
Instrument Software Overview
641
Software Licensing
641
Software Updates
642
Instrument Measurement Application Software
642
21 Performance Verification and Adjustment Software
644
Test Software Overview
644
Performance Verification Tests
644
Adjustments
644
Required Test Equipment
645
22 Tests
647
Functional Test Versus Performance Verification
647
Before Performing a Functional Test
648
Test Equipment
649
Displayed Average Noise Level (DANL)
652
Procedure
653
Frequency Readout Accuracy
656
Procedure
657
Second Harmonic Distortion (SHD)
659
Procedure
660
Amplitude Accuracy at 50 Mhz
662
Procedure
663
Amplitude Accuracy - Preamp on
667
Procedure
668
Frequency Response (Flatness)
671
Procedure
672
Frequency Response (Flatness) - Preamp on
677
Procedure
678
Scale Fidelity
683
Procedure
684
CISPR Resolution Bandwidth Shape Accuracy
686
Procedure
687
Quasi-Peak Detector Accuracy
690
Sine Wave Generator Characterization
691
Initial Setup
692
Band a Testing
692
Band B Testing
694
Band C Testing
697
Band D Testing
700
Peak Detector Accuracy
704
Sine Wave Generator Characterization
705
Initial Setup
706
Band a Testing
706
Band B Testing
708
Band C Testing
710
Band D Testing
712
EMI Average Detector Accuracy
714
Sine Wave Generator Characterization
715
Initial Setup
716
Band a Testing
716
Band B Testing
718
Band C Testing
720
Band D Testing
723
RMS Average Detector Accuracy
725
Sine Wave Generator Characterization
726
Initial Setup
727
Band a Testing
727
Band B Testing
729
Band C Testing
731
Band D Testing
734
Intermittent, Unsteady, Drifting Disturbances
736
Initial Setup
737
EMI Average Detector Testing
737
RMS Average Detector Testing
739
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