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N5221A
Keysight Technologies N5221A
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Keysight N5221A/22A Service Guide
7-
17
Repair and Replacement Pr
ocedur
es
Removi
ng a
nd Re
pla
cin
g th
e A4
–A1
3 Boa
r
ds
Figur
e 7-6
A4, A5, A8, A10, A1
1, A12, and A13
Boards Removal
280
282
Table of Contents
Main Page
Default Chapter
2
Safety Notices
2
Table of Contents
3
Table of Contents
11
Safety and Regulatory Information
11
Information in this Chapter
11
Chapter One At-A-Glance
11
Safety Symbols
12
General Safety Considerations
13
Safety Earth Ground
13
Before Applying Power
13
Servicing
15
Electrostatic Discharge Protection
17
Regulatory Information
19
Instrument Markings
19
Lithium Battery Disposal
20
General Product Information
21
Information in this Chapter
21
Chapter Two At-A-Glance
21
Maintenance
22
Physical Maintenance
22
Electrical Maintenance
22
Analyzer Options, Accessories and Upgrades Available
23
Pulse I/O Adapter-N1966A
23
Required Service Test Equipment
24
Keysight Support, Services, and Assistance
27
Service and Support Options
27
Contacting Keysight
27
Shipping Your Analyzer to Keysight for Service or Repair
28
Tests and Adjustments
29
Information in this Chapter
29
Conventions Used for Hardkeys, Softkeys, and Menu Items
29
Chapter Three At-A-Glance
29
Before You Begin
32
Verify the Operating Environment
32
Protect against Electrostatic Discharge (ESD)
32
Allow the Analyzer to Warm up
33
Review the Principles of Connector Care
33
About System Verification and Performance Tests
35
System Specifications
35
Instrument Specifications
36
System Verification Procedure
36
Performance Tests
36
Certificate of Calibration
37
ANSI/NCSL Z540.3-2006 and ISO/IEC 17025 Verification
38
Non-Standards Compliant Verification
39
Preliminary Checks
40
The Operator's Check
40
The Test Port Cable Checks
42
System Verification
49
What the System Verification Verifies
49
Measurement Uncertainty
49
Measurement Traceability
50
Performing System Verification
51
Performance Tests
59
Source Power Accuracy Test
59
Source Maximum Power Output Test
60
Source Power Linearity Test
61
Frequency Accuracy Test
62
Trace Noise Test
62
Receiver Compression Test
63
Noise Floor Test
65
Calibration Coefficients Test
66
Dynamic Accuracy Test
67
Adjustments
69
10 Mhz Frequency Reference Adjustment
69
Synthesizer Bandwidth Adjustment
70
Source Adjustment
70
IF Gain Adjustment
71
Receiver Characterization
71
Receiver Adjustment
72
EE Default Adjustment
74
IF Response Adjustment (Option 090, 093, or 094 Only)
74
Troubleshooting
75
Information in this Chapter
75
Chapter Four At-A-Glance
76
Conventions Used for Hardkeys, Softkeys, and Menu Items
76
Operating the Analyzer with Covers Removed
77
Protect against Electrostatic Discharge (ESD)
78
Assembly Replacement Sequence
79
Keysight N5221A/22A Service Guide
79
Getting Started with Troubleshooting
80
Check the Basics
80
Troubleshooting Organization
80
Power up Troubleshooting
82
Power Supply Check
83
Troubleshooting LCD Display Problems
88
Front Panel Troubleshooting
90
Front Panel Keypad and RPG Test
90
A3 Display Test
93
Checking the A2 USB Board
93
A1 Front Panel Interface Board
94
Rear Panel Troubleshooting
95
Checking the USB Ports
95
Checking the CONTROLLER Port
95
LAN Troubleshooting
96
Measurement System Troubleshooting
102
Before You Begin-Consider: Where Do You See a Problem
102
Verifying the A, B, C, D, and R Traces (Standard S-Parameter Mode)
103
Where to Begin Troubleshooting
105
Checking the Source Group
108
Checking the Signal Separation Group
113
Checking the Receiver Group
117
Instrument Block Diagrams Sheet 1
121
Microwave PNA, N5221A/22A
121
Instrument Block Diagrams Sheet 2
123
Microwave PNA, N5221A/22A
123
Theory of Operation
125
Information in this Chapter
125
Chapter Five At-A-Glance
125
Network Analyzer System Operation
126
Functional Groups of the Network Analyzer
127
Synthesized Source Group Operation
130
Basic Operation
130
A4, A13, and A11 13.5 Ghz Synthesizer Boards
133
A5 and A8 26.5 Ghz Source Boards
134
A21 Multiplier/Amplifier 26.5 Board (HMA26.5)
135
A10 Frequency Reference Board
135
A19 Test Set Motherboard
135
Signal Separation Group Operation
140
Configurable Test Set
140
A25-A28 Receiver Couplers
141
A29-A32 Test Port Couplers
141
A34-A37 65-Db Source Step Attenuators and A38-A41 Bias Tees
144
Receiver Group Operation
145
A42-A45 35-Db Receiver Step Attenuators
145
A33 Reference Mixer Switch
145
A23 and A24 Mixer Bricks
145
A20 if Multiplexer Board
146
A12 SPAM Board (Analog Description)
147
Digital Processing and Digital Control Group Operation
150
Front Panel Subgroup
152
Data Acquisition and Processing Subgroup
153
Power Supply Group Operation
155
Replaceable Parts
157
Information in this Chapter
157
Chapter Six At-A-Glance
157
Ordering Information
158
Assembly Replacement Sequence
159
Rebuilt-Exchange Assemblies
160
Replaceable Parts Listings
162
Front Panel Assembly, Front Side, All Options
166
Front Panel Assembly, Back Side, All Options
168
Top Assemblies and Cables, All Options
172
2-Port Configuration, Option 200
177
2-Port Configuration, Option 201
183
2-Port Configuration, Option 210
190
2-Port Configuration, Option 217
196
2-Port Configuration, Option 219
203
4-Port Configuration, Option 400
210
4-Port Configuration, Option 401
217
4-Port Configuration, Option 410
224
4-Port Configuration, Option 417
231
4-Port Configuration, Option 419
240
Rear Panel Assembly, All Options
250
Top Hardware and Miscellaneous Parts, All Options
252
Bottom Hardware and Miscellaneous Parts
254
Internal Hardware and Miscellaneous Parts, All Options
257
External Hardware and Miscellaneous Parts, All Options
259
Miscellaneous Part Numbers
260
Repair and Replacement Procedures
265
Information in this Chapter
265
Chapter Seven At-A-Glance
265
Personal Safety Warnings
266
Electrostatic Discharge (ESD) Protection
267
Removal and Replacement Procedures
268
Removing the Covers
270
Removing and Replacing the Front Panel Assembly
272
Removing and Replacing the A1-A3 and Other Front Panel Subassemblies
274
Removing and Replacing the A4-A13 Boards
279
Removing and Replacing the A14 System Motherboard
282
Removing and Replacing the A15 Midplane Board
285
Removing and Replacing the A16 Power Supply Assembly
287
Removing and Replacing the A17 CPU Board Assembly
289
Removing and Replacing the A18 GPIB Board
291
Removing and Replacing the A19 Test Set Motherboard
293
Removing and Replacing the A20 if Multiplexer Board
295
Removing and Replacing the A21 HMA26.5
297
Removing and Replacing the A22 Splitter
299
Removing and Replacing the A23 and A24 Mixer Bricks
301
Removing and Replacing the A25-A28 Receiver Couplers and Mounting Brackets
303
Removing and Replacing the A29-A32 Test Port Couplers
305
Removing and Replacing the A33 Reference Mixer Switch
307
Removing and Replacing the A34-A37 Source Attenuators, the A38-A41 Bias Tees, and the A42-A45 Receiver Attenuators
309
Removing and Replacing the A38-A41 Bias Tees
312
Removing and Replacing the A51 Solid State Drive (SSD)
314
Removing and Replacing the Rear Panel
316
Removing and Replacing the Front Panel LED Boards
318
Removing and Replacing the Fans
320
Removing and Replacing the Lithium Battery
322
Post-Repair Procedures
324
General Purpose Maintenance Procedures
329
Information in this Chapter
329
Chapter Eight At-A-Glance
329
Conventions Used for Hardkeys, Softkeys, and Menu Items
329
Error Terms
330
Using Error Terms as a Diagnostic Tool
330
Performing Measurement Calibration
331
Using Flowgraphs to Identify Error Terms
331
Accessing Error Terms
334
Error Term Data
336
Option Enable Utility
339
Accessing the Option Enable Utility
339
Option Entitlement Certificate
339
Enabling or Removing Options
340
Repairing and Recovering Option Data
341
Installing or Changing a Serial Number
342
Firmware Upgrades
343
How to Check the Current Firmware Version
343
Downloading from the Internet
343
Operating System Recovery
344
Recovering from Solid State Drive (SSD) Problems
344
Correction Constants
345
Storing Correction Constants
345
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