Agilent Technologies N5161A User manual

Agilent Technologies
Agilent Technologies
N5161A/62A/81A/82A/83A
MXG Signal Generators
Service Guide
NOTICE: In August 2014, Agilent
Technologies’ former Test and Measurement
business became Keysight Technologies. This
document is provided as a courtesy but is no
longer kept current and thus will contain
historical references to Agilent. For more
information, go to www.keysight.com.
深圳德标仪器 135-1095-0799

Service Guide
Notices
© Agilent Technologies, Inc. 2006-2015
No part of this manual may be reproduced in
any form or by any means (including elec-
tronic storage and retrieval or translation
into a foreign language) without prior agree-
ment and written consent from Agilent
Technologies, Inc. as governed by United
States and international copyright laws.
Manual Part Number
N5180-90006
Edition
Edition 1, October 2015
Printed in USA
Agilent Technologies, Inc.
5301 Stevens Creek Blvd.
Santa Clara, CA 95052 USA
Warranty
The material contained in this docu-
ment is provided “as is,” and is sub-
ject to being changed, without notice,
in future editions. Further, to the max-
imum extent permitted by applicable
law, Agilent disclaims all warranties,
either express or implied, with regard
to this manual and any information
contained herein, including but not
limited to the implied warranties of
merchantability and fitness for a par-
ticular purpose. Agilent shall not be
liable for errors or for incidental or
consequential damages in connec-
tion with the furnishing, use, or per-
formance of this document or of any
information contained herein. Should
Agilent and the user have a separate
written agreement with warranty
terms covering the material in this
document that conflict with these
terms, the warranty terms in the sep-
arate agreement shall control.
Technology Licenses
The hardware and/or software described in
this document are furnished under a license
and may be used or copied only in accor-
dance with the terms of such license.
Restricted Rights Legend
U.S. Government Restricted Rights. Soft-
ware and technical data rights granted to
the federal government include only those
rights customarily provided to end user cus-
tomers. Agilent provides this customary
commercial license in Software and techni-
cal data pursuant to FAR 12.211 (Technical
Data) and 12.212 (Computer Software) and,
for the Department of Defense, DFARS
252.227-7015 (Technical Data - Commercial
Items) and DFARS 227.7202-3 (Rights in
Commercial Computer Software or Com-
puter Software Documentation).
Safety Notices
CAUTION
A CAUTION notice denotes a haz-
ard. It calls attention to an operat-
ing procedure, practice, or the like
that, if not correctly performed or
adhered to, could result in damage
to the product or loss of important
data. Do not proceed beyond a
CAUTION notice until the indicated
conditions are fully understood and
met.
WARNING
A WARNING notice denotes a
hazard. It calls attention to an
operating procedure, practice, or
the like that, if not correctly per-
formed or adhered to, could result
in personal injury or death. Do not
proceed beyond a WARNING
notice until the indicated condi-
tions are fully understood and
met.
Service Guide
深圳德标仪器 135-1095-0799

Contents
iii
1. Troubleshooting
Before Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
ESD Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Contacting Agilent Technologies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Returning a Signal Generator for Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Overall Block Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
A1 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
A2 Vector Module (N5162A/82A Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
A3 RF Assembly (N5161A/62A/81A/82A Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
A3 RF Assembly (N5183A Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
A4 Internal Memory Card (N5162A/82A Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
A5 CPU. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
A6 Inverter Interface Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
A7 Micro Deck (N5183A Only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
A8 Floating BNC Bypass (N5183A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
A9 Interface Board (N5161A/62A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Common Circuitry for the N5181A/82A/83A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Getting Started with Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-13
Self Test Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-15
Running Self Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-16
Run Self Test Using the Front Panel (N518xA only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-16
Accessing the MXG Web-Enabled Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-18
Self Tests Do Not Run or Self Tests Run Slowly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-19
Boot-up Routine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-20
Troubleshooting Self Test 1105 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-25
Troubleshooting Assembly Level Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-26
A1 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-26
A2 Vector Module Troubleshooting (N5162A/82A Only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-29
A3 RF Assembly Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-31
A4 Internal Memory Card Troubleshooting (N5162A/82A Only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-32
A5 CPU Assembly Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-33
A6 DC-AC Inverter Interface Board (N5181A/82A/83A). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-34
A7 Micro Deck (N5183A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-36
A8 Floating BNC Bypass Troubleshooting (N5183A). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-38
A9 Interface Board Troubleshooting (N5161A/62A). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-38
No Output Power or Output Power is Unleveled (N5183A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-40
Low Output Power or No Output Power < 3.2 GHz (N5183A). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-41
Low Output Power or No Output Power >= 3.2 GHz (N5183A). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-46
Checking ALC Operation < 3.2 GHz (N5183A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-48
Amplitude Modulation Problems (N5183A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-50
Pulse Modulation Problems (N5183A). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-51
LCD Display Appears to be Inoperative (Dark). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-52
The Signal Generator Does Not Power On. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-52
All Front Panel LEDs are Not Functioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-56
The Green Front Panel Power Switch LED or Yellow Standby LED is Not Working. . . . . . . . . . . . . . . . . . . . . . . . . . . .1-57
Front Panel Hardkeys or Softkeys are Not Functioning (N5181A/82A/83A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-60
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iv
Contents
The RPG Knob is Not Functioning (N5181A/82A/83A). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-60
Blank or Missing Pixels (N5181A/82A/83A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-62
The Screen Saver is Not Functioning (N5181A/82A/83A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-62
Boot Time Diagnostics Mode (N5161A/62A Only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-62
Exceptions - Auto-reboot, ERROR LED Blinking (N5161A/62A Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-63
The Fans are Not Working . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-64
No LAN Activity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-64
No Front Panel USB Activity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-64
No Rear-Panel USB Activity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-64
No GPIB Activity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-65
Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-65
Troubleshooting Unlocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-65
508 Frac-N Loop Unlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-65
512 Reference Unlocked. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-65
515 Reference Missing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-66
532 PCI Bridge FPGA DCM Unlocked . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-66
533 RF Analog FPGA DCM Unlocked . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-66
Troubleshooting Unlevels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-66
Troubleshooting the RF Path (N5161A/62A/81A/82A). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-68
Troubleshooting the 6 GHz Electronic Attenuator (N5161A/62A/81A/82A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-68
Troubleshooting Harmonic Spurious . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-69
Troubleshooting Harmonic Spurious by Fundamental Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-70
To Verify Harmonic Performance at the RF Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-70
Troubleshooting Non-Harmonic Spurious . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-71
Troubleshooting Performance Test Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-72
Manual Performance Test Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-72
Troubleshooting Adjustment Test Problems (N5183A Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-73
Automated Performance Test Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-73
2. Replaceable Parts
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Order Parts Fast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Shipping a Defective Assembly Back to Agilent Technologies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Frequency and Hardware Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Assemblies and Hardware Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Front Panel Assemblies (N5161A/62A only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Front Panel Assemblies (N5181A/82A/83A only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Assemblies from a Top View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Assemblies from a Bottom View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
Cables from a Top View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Cables from a Bottom View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21
Front Panel View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21
Disassembled Rear Panel View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23
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Contents
v
Main Chassis with Inside Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-26
Outer Instrument Cover and Associated Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-27
Miscellaneous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-29
Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-29
Electrostatic Discharge (ESD) Protective Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-29
Abbreviations Used in Part Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-30
3. Assembly Replacement
Before You Replace an Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
After Replacing or Repairing an Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Assemblies You Can Replace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Outer Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
Removal Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
Inner Top Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
Inner Bottom Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
Front-Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10
Removal Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10
USB Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
Removal Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
LCD Display (N5181A/82A/83A only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14
Removal Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14
A6 DC-AC Inverter Interface Board (N5181A/82A/83A only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-16
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-16
Removal Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-16
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-16
A9 Interface Board (N5161A/62A only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-18
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-18
Removal Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-18
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-18
Key Pad (N5181A/82A/83A only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-20
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-20
Removal Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-20
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Contents
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20
Power Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21
Removal Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21
Rear Panel (N5161A/81A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22
Removal Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22
Rear Panel (N5162A/82A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24
Removal Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24
Rear Panel (N5183A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26
Removal Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26
A1 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-28
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-28
Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-28
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-28
A2 Vector Module (N5162A with Option 012 and N5182A Option 1EM with Option 012) . . . . . . . . . . . . . . . . . . . . . 3-30
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-30
Removal Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-30
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-30
A2 Vector Module (N5162A/82A without Option 012). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-32
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-32
Removal Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-32
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-32
A3 RF Assembly (N5162A, with and without Option 012, N5182A with Option 012, and N5182A Option 1EM, with and
without Option 012) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-34
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-34
Removal Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-34
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-34
A3 RF Assembly - Standard (N5181A/82A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-38
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-38
Removal Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-38
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-38
A3 RF Assembly - N5161A and N5181A Option 1EM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-42
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-42
Removal Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-42
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-42
A3 RF Assembly (N5183A only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-46
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-46
Removal Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-46
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-46
A3BT1 Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-50
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vii
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-50
Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-50
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-50
A4 Internal Memory Card (N5162A/82A only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-52
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-52
Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-52
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-52
A5 CPU. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-54
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-54
Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-54
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-54
A7 Micro-Deck (N5183A only - Standard) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-56
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-56
Removal Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-56
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-56
A7 Micro-Deck (N5183A only - Option 1EM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-59
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-59
Removal Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-59
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-59
A8 Floating BNC Bypass (N5183A only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-62
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-62
Removal Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-62
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-62
RF Connector (N5183A only - Standard). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-64
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-64
Removal Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-64
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-64
B1 thru B4 Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-66
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-66
Removal Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-66
Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-66
4. Post-Repair Procedures and Performance Verification
Post Repair Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Assembly Installation and Removal Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Service Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
Post-Repair Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
Manual Performance Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
Adjustments (N5183A Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
Automated Performance Verification Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
Performance Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
I/Q Calibration (N5162A/82A only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
Running Self Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
Self Test Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9
Relative Frequency Range and Accuracy Verification (N5161A/62A1/81A/82A Only). . . . . . . . . . . . . . . . . . . . . . . . . .3-10
Frequency Counter Procedure (N5161A/62A/81A/82A). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10
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viii
Contents
Spectrum Analyzer Procedure (N5161A/62A1/81A/82A). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11
Leveled Output Power Verification (N5161A/62A1/81A/82A Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
N5161A1/81A Output Power Test Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
N5162A/82A Output Power Test Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
5. Safety and Regulatory
General Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Lithium Battery Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
6. Instrument History
How to Use this Chapter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
September 2009 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
January 2009 (N5161A/62A/81A/82A/83A only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
August 2008 (N5161A/62A/81A/82A/83A only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
April 2008 (N5182A/83A only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
December 2007. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
November 2007. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
October 2007 (N5181A/82A only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
May 2007 (N5181A/82A only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
December 2006 (N5181A/82A only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
September 2006 (N5181A/82A only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
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Agilent N5161A/62A/81A/82A/83A MXG Signal Generators Service Guide ix
Documentation Overview
Installation Guide • Safety Information
• Receiving the Instrument
• Environmental & Electrical Requirements
•BasicSetup
• Accessories
• Operation Verification
• Regulatory Information
User’s Guide • Signal Generator Overview
• Setting Preferences & Enabling Options
• Basic Operation
• Optimizing Performance
• Using Analog Modulation (Option UNT Only)
• Using Pulse Modulation (Option UNU Only)
• Basic Digital Operation - No BBG Option Installed
• Basic Digital Operation (Option 651/652/654)
• Adding Real-Time Noise to a Signal (Option 403)
• Real-Time Phase Noise Impairments (Option 432)
• Custom Digital Modulation (Option 431)
• Multitone and Two-Tone Waveform Generator (Option 430)
• Working in a Secure Environment
• Troubleshooting
Programming Guide • Getting Started with Remote Operation
• Using IO Interfaces
• Programming Examples
• Programming the Status Register System
• Creating and Downloading Files
• Creating and Downloading User-Data Files
SCPI Reference •SCPIBasics
• Basic Function Commands
• LXI System Commands
•SystemCommands
• Analog Modulation Commands
• Arb Commands
• Real-Time Commands
• N5161A/62A/81A/82A SCPI Command Compatibility
• N5183A SCPI Command Compatibility
Service Guide • Troubleshooting
• Replaceable Parts
• Assembly Replacement
• Post-Repair Procedures
• Safety and Regulatory Information
• Instrument History
Key Helpa• Key function description
• Related SCPI commands
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Agilent N5161A/62A/81A/82A/83A MXG Signal Generators Service Guide
x
aPress the Help hardkey, and then the key for which you wish help.
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Agilent N5161A/62A/81A/82A/83A MXG Signal Generators Service Guide 1-1
1Troubleshooting
Before Troubleshooting
WARNING These troubleshooting instructions are for use by qualified personnel. To avoid electrical shock, do not perform any
troubleshooting unless qualified.
The opening of covers or removal of parts is likely to expose dangerous voltages. Disconnect the instrument from all
voltage sources before it is opened.
The following techniques related to ESD and static-safe workstations should not be used when working on circuitry
with a voltage potential greater than 500 volts.
WARNING Keep fingers and all other objects away from the fans when the signal generator is plugged in.
CAUTION Powering up the MXG ATE while holding the LAN Preset hard key, causes the instrument to boot up in a diagnostic mode
(indicated by the three flashing LEDs on the front panel).
You are entering the service (diagnostics) menu.
• If you are not a qualified service technician, you should press Abort now.
• The service menu can be used to recover from severe instrument failure.
• If you choose to use the service (diagnostics) menu, do not select any menu items which you do not fully understand. If
you are SURE you want to use the service menu, press Continue. Otherwise press Abort.
Before removing any instrument assembly, the instrument’s static and dynamic arrays must be configured for the exchange of
assemblies. The process to do the appropriate configuration is performed automatically by the MXG with the Assembly
Installation and Removal Overview front panel softkeys. Refer to the Assembly Installation and Removal Overview and to
the “Hardware Assembly Installation and Removal Softkeys” on page 4-2.
For the instrument to meet performance specifications and for accurate self-test results, allow a warm up period of 45 minutes
within an operational temperature range of 0 to 55 °C. For more information, refer to the MXG signal generator Data Sheet.
NOTE When a procedure instructs you to preset the signal generator, press the Preset hardkey, not the User Preset hardkey.
ESD Information
Protection from Electrostatic Discharge
Electrostatic discharge (ESD) can damage or destroy electronic components. All work on electronic assemblies should be performed at a
static-safe workstation using two types of static-safe workstation protection:
•conductive table-mat and wrist-strap combination
•conductive floor-mat and heel-strap combination
Both types, when used together, provide a significant level of ESD protection. Of the two, only the table-mat and wrist-strap combination
provides adequate ESD protection when used alone. To ensure user safety, the static-safe accessories must provide at least 1 MΩof isolation
from ground.
Handling of Electronic Components and ESD
CAUTION Always handle printed circuit board assemblies by the edges. This will reduce the possibility of ESD damage to components
and prevent contamination of exposed plating.
The possibility of unseen damage caused by ESD is present whenever components are transported, stored, or used. The risk of ESD damage
can be greatly reduced by close attention to how all components are handled.
• Keep static-generating materials at least one meter away from all components.
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Agilent N5161A/62A/81A/82A/83A MXG Signal Generators Service Guide
Troubleshooting
Before Troubleshooting
1-2
• Store or transport components in static-shielding containers.
Contacting Agilent Technologies
Before contacting Agilent, read the warranty information that is shipped with your signal generator. If your signal generator is covered under
a maintenance agreement, be familiar with its terms.
Assistance with test and measurements needs, and information on finding a local Agilent office is available on the Web
at: http://www.agilent.com/find/assist.
If you do not have access to the internet, contact your local field engineer.
NOTE In any correspondence or telephone conversation, refer to the signal generator by its model number and full serial number. With
this information the Agilent representative can determine whether your signal generator is still within its warranty period.
Be prepared to provide the following information:
• a complete description of the failure
• if the signal generator was dead on arrival (DOA) or if it functioned prior to failure
• the model number, all options, and the serial number of the signal generator
• the firmware revision date
• if the self tests have been run
Returning a Signal Generator for Service
Use the information in this section if you need to return the signal generator to Agilent Technologies.
Packaging the Signal Generator
1. Use the original packaging materials or a strong shipping container that is made of double-walled, corrugated cardboard with 159 kg
(350 lb.) bursting strength. The carton must be both large enough and strong enough to accommodate the signal generator and allow at
least 3 to 4 inches on all sides of the signal generator for packing material.
CAUTION Signal generator damage can result from using packaging materials other than those specified. Never use styrene pellets, of
any shape, as packaging material. They do not adequately cushion the signal generator or prevent it from shifting in the
carton. Styrene pellets can cause equipment damage by generating static electricity and lodging in the signal generator fan.
2. Surround the signal generator with at least 3 to 4 inches of packing material, or enough to prevent the instrument from moving in the
carton. If packing foam is not available, the best alternative is SD-240 Air Cap™ from Sealed Air Corporation (Hayward, CA 94545).
Air Cap looks like a pink plastic sheet covered with 1-1/4 inch air-filled bubbles. Use the Air Cap to reduce static electricity. Wrap the
signal generator several times in the material to protect the signal generator and to prevent it from moving in the carton.
3. Seal the shipping container securely with strong, nylon adhesive tape.
4. Mark the shipping container “FRAGILE, HANDLE WITH CARE” to ensure careful handling.
5. Retain copies of all shipping papers.
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Agilent N5161A/62A/81A/82A/83A MXG Signal Generators Service Guide
Troubleshooting
Overall Block Description
1-3
Overall Block Description
The objective of the overall block diagram is to provide a functional overview of the Agilent N5161A/62A//81A/82A/83A MXG Signal
Generator. The major assemblies shown in the block diagram are described in this section. Familiarize yourself with this information before
you start troubleshooting.
The overall block diagrams for the N5161A/81A and N5162A/82A are identical, except for the A2 Vector Module. The A2 Vector Module
controls digital arbitrary circuitry operations in the N5162A/82A.
The N5183A includes an A7 Micro Deck and uses a different A3 RF assembly than that used in the N5161A/62A/81A/82A.
The following components are not shown in the overall block diagram, but are described in this section.
• A1 power Supply
• A5 CPU
• A6 DC-AC Inverter Interface Board
• A8 Floating BNC Bypass (N5183A)
• A9 Interface Board (N5161A/62A)
• Front Panel
A1 Power Supply
The main power supply is a switching supply designed with an automatic line-voltage and frequency selection. It converts line voltage (120
Vac or 240 Vac) to regulated dc voltages. The internal power line fuse is not replaceable. If the fuse opens, the power supply must be
replaced. All A1 Power Supply outputs, except for the 5.1V standby supply, are over current protected and will not be damaged if a
continuous short circuit occurs.
A2 Vector Module (N5162A/82A Only)
The A2 Vector Module, a self contained, fully enclosed, Baseband Generator assembly, supports digital modulation in the N5162A/82A. It
receives a 500 MHz clock signal and the main RF signals from the A3 RF assembly when digital modulation is turned on. The RF signals are
I/Q modulated, band-pass filtered, amplified, and returned to the amplification output stages of the A3 RF assembly.
A3 RF Assembly (N5161A/62A/81A/82A Only)
NOTE The N5161A/62A/81A/82A A3 RF assembly is not interchangeable with the N5183A A3 RF assembly.
The A3 RF assembly combines circuitry traditionally found on individual, interconnected assemblies such as the reference, synthesizer, and
output assemblies.
Reference Circuitry
The reference circuitry uses a 10 MHz VCTCXO oscillator. The circuitry is designed to lock to an external reference frequency between
1 MHz and 50 MHz, with a resolution less than 0.1 Hz. Without the flexible reference option (Option 1ER) the reference will only lock to an
external reference of 10 MHz.
The reference output signals are multiplied to provide the following signals:
• A 50 MHz reference signal to the synthesizer Frac-N and FM circuitry.
• A 500 MHz clock signal to the A2 Vector Module.
• A 1 GHz LO signal to the heterodyne (HET) band mixer.
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Agilent N5161A/62A/81A/82A/83A MXG Signal Generators Service Guide
Troubleshooting
Overall Block Description
1-4
Synthesizer Circuitry
The frequency synthesis circuitry is based on a phase-locked loop (PLL). It uses a Frac-N synthesis FPGA to control the multiplier and
divider module. Frequency multipliers and dividers are used to extend the basic synthesis loop frequency range to cover 250 MHz to 6 GHz.
Frequency and phase modulation are built into the synthesizer circuitry using the Frac-N FPGA.
• The VCO tunes over a range of 750 MHz to 1.5 GHz.
— From 250 MHz to 375 MHz, the VCO is divided by 4.
— From 375 MHz to 750 MHz, the VCO is divided by 2.
• The PLL operates over a range of 1.5 to 3 GHz.
• The heterodyne band provides frequencies from 100 kHz to 250 MHz and operates over a VCO range of 1.0001-1.25 GHz. The 100 kHz
to 250 MHz signal is obtained by mixing the heterodyne band with the 1 GHz LO signal provided by the reference circuitry. The
resultant IF signal is then amplified to provide the 100 kHz to 250 MHz RF signals.
Output Power Leveling Circuitry (Automatic Leveling Control Circuitry)
The Automatic Leveling Control (ALC) loop on the A3 RF assembly provides leveled output power. The ALC loop is a feedback control
system that monitors RF power and maintains power at a user-selected level. The RF path must provide a minimum power level to the ALC
loop for the ALC loop to work correctly. The minimum required power is slightly higher than the maximum-leveled power.
• In closed loop mode, ALC on, a leveled output power is obtained by comparing a detected voltage with a reference voltage. The detected
voltage is generated by coupling off a portion of the RF output signal and converting it to a dc voltage using detector diodes. The
reference voltage is generated using calibrated DACs. When the reference and detected levels are not the same, the ALC integrator
output ramps up or down to increase or decrease the detected level. If the integrator cannot achieve a match between the detected and
reference voltages, an unleveled annunciator is displayed.
• In open loop mode, ALC off, a leveled output power is obtained with a reference voltage. The reference voltage is used to control the
modulation drive current. The reference voltage is determined by setting the desired power. It includes the stored calibration data used to
compensate for any losses that occur after the detector.
All analog Amplitude Modulation (AM) is performed using a dedicated diode modulator in the ALC subsystem. For Pulse Modulation, ALC
is only on for a short period within the pulse duration. Outside this short period of time, ALC is in a holding state waiting for the next pulse.
A3 RF Assembly (N5183A Only)
NOTE The N5183A A3 RF assembly is not interchangeable with the N5161A/62A/81A/82A A3 RF assembly.
The N5183A A3 RF assembly provides the circuitry to generate the frequency range of 100 kHz to 5 GHz and provides:
• Frequency modulation
• Amplitude modulation
• Pulse modulation
• Frequency accuracy
• 1 GHz LO signal to the heterodyne (HET) band mixer
• Switching speed
• Phase noise impairment
The A3 RF assembly also includes an ALC modulator and a pulse modulator for frequencies from
100 kHz to < 3.2 GHz.
Generating Frequencies ≤3.2 GHz
The A3 RF assembly generates and modulates signals at frequencies from 100 kHz to ≤3.2 GHz. The Mod Filter on the A7 Micro Deck
switches the RF signals to the main signal path. (The attenuator on the A7 Micro Deck impacts signal performance from 100 kHz to
≤3.2 GHz. The high band coupler on the A7 Micro Deck impacts performance from < 2 GHz to ≤ 3.2 GHz.)
Reference Circuitry
The reference circuitry uses a 10 MHz VCTCXO oscillator. The circuitry is designed to lock to an external reference frequency from 1 MHz
to 50 MHz, with a resolution of less than 0.1 Hz. Without the flexible reference option (Option 1ER), the reference will only lock to an
external reference of 10 MHz.
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Agilent N5161A/62A/81A/82A/83A MXG Signal Generators Service Guide
Troubleshooting
Overall Block Description
1-5
The reference output signals are multiplied to provide the following signals:
• 50 MHz reference signal to the synthesizer Frac-N and FM circuitry
• 1 GHz LO signal to the heterodyne (HET) band mixer
Synthesizer Circuitry
The frequency synthesis circuitry is based on a phase-locked loop (PLL). It uses a Frac-N synthesis FPGA to control the multiplier and
divider module. Frequency multipliers and dividers are used to extend the basic synthesis loop frequency range to cover 250 MHz to 6 GHz.
Frequency and phase modulation are built into the synthesizer circuitry using the Frac-N FPGA.
• The VCO tunes over a range of 750 MHz to 1.5 GHz.
— From 250 MHz to 375 MHz, the VCO is divided by 4.
— From 375 MHz to 750 MHz, the VCO is divided by 2.
• The PLL operates over a range of 1.5 GHz to 3 GHz.
• The heterodyne band provides frequencies from 100 kHz to 250 MHz and operates over a VCO range of 1.0001-1.25 GHz. The 100 kHz
to 250 MHz signal is obtained by mixing the heterodyne band with the 1 GHz LO signal provided by the reference circuitry. The
resultant IF signal is then amplified to provide the 100 kHz to 250 MHz RF signals.
Output Power Leveling Circuitry (Automatic Leveling Control Circuitry) < 3.2 GHz
The A3 RF assembly contains the ALC modulator diode for frequencies < 3.2 GHz. ALC operation is similar to that in the
N5161A/62A/81A/82A except that the ALC control circuitry and coupler detector are located on the A7 Micro Deck.
The circuitry that creates pulse waveforms is located on the A3 RF assembly as is the pulse modulator for frequencies < 3.2 GHz. The pulse
modulator for frequencies > 3.2 GHz is located on the A7 Micro Deck.
Pulse Modulation
Pulse modulation drive for all frequencies is developed on the A3 RF assembly. For frequencies ≤3.2 GHz, the pulse modulator diode is
located on the A3 RF assembly.
Amplitude Modulation
The AM drive signal is generated on the A3 RF assembly, routed to the ALC assembly on the A7 Micro Deck, and then applied to the ALC
modulation diode on the A3 RF assembly.
Frequency Modulation, Phase Modulation, Phase Noise, and Switching Speed
The A3 RF assembly determines the signal generator’s FM, ΦM, Phase Noise (single sideband and residual phase noise), and switching
speed performance.
A4 Internal Memory Card (N5162A/82A Only)1
The A4 Internal Memory Card supplies additional non-volatile memory. It is a USB 2.0 compliant flash card with 800 MSa; equivalent to
4 GB.
1For instruments with serial prefixes <US/MY/SG4818, the persistent memory value is 512 MB (102 MSamples).
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Agilent N5161A/62A/81A/82A/83A MXG Signal Generators Service Guide
Troubleshooting
Overall Block Description
1-6
A5 CPU
The A5 CPU, a Processor PCI Mezzanine Card (PPMC) CPU board, complies with the VITA32 standard for PPMCs and provides common
instrument I/O interfaces. The A5 CPU controls all activities in the signal generator. It translates information entered from the front panel
keys, LAN, GPIB, USB 2.0, or Auxiliary Interface (25 Pin SCSI II) into machine level instructions and communicates these instructions on
the internal buses. The A5 CPU also monitors critical circuits for unleveled and unlocked conditions, and reports these problems on the LCD
Display.
A6 Inverter Interface Board
The A6 DC-AC Inverter Interface Board controls the Cold Cathode Fluorescent Tube (CCFT) backlight on the LCD Display module and
converts a dc voltage to an ac voltage. Varying the dc voltage on the inverter alters the backlight brightness.
A7 Micro Deck (N5183A Only)
The A7 Micro Deck provides the circuitry necessary to generate frequencies ≥ 3.2 GHz and to control the automatic level control (ALC) at
all frequencies.
The N5183A A7 Micro Deck contains the following circuits:
• a 20 GHz doubler that generates frequencies ≥3.2 GHz to 20 GHz
• a 40 GHz doubler that generates frequencies > 20 GHz to 40 GHz (Option 532/540)
• a Mod Filter that provides ALC and pulse modulators for frequencies ≥3.2 GHz
• an ALC assembly that provides power level control for all frequencies
• a 100 kHz to 2 GHz low band coupler/detector
• a > 2 GHz to 20 GHz coupler/detector (Option 520) or a > 2 GHz to 44 GHz coupler/detector (Option 532/540)
• an attenuator
Basic A7 Micro Deck Operation
The A7 Micro Deck provides output power level and ALC control using the following circuitry.
• ALC board
• Low-band detector
• High-band detector
• Low-band modulator
• High-band modulator attenuator
ALC On Operation
In ALC On mode (closed loop operation), the RF output level is monitored and compared to a reference voltage. A difference between the
reference and detected voltages results in a change to the ALC modulator drive, which causes a change in the output power. When the
reference and detected voltages agree, the ALC modulator drive level is maintained, resulting in a constant RF output power level.
To achieve leveled output power, the CPU sets the ALC reference voltage (calibrated) based on the set power level and applies this voltage
as one input to the ALC integrator. The detector voltage (low and high band detectors) is the second input to the integrator and provides the
feedback necessary for the ALC assembly to maintain leveled output power. The ALC integrator circuit provides the drive to the ALC
modulator circuit, which controls (increases or decreases) the amplitude of the RF signal passing through ALC modulator.
When both of the input voltages (reference and detector) are at the same DC voltage level, the integrator output is constant. When the
voltages to the integrator’s inputs are not the same, the integrator output increases or decreases the modulator drive, resulting in a change in
the output power.
The A7 Micro Deck contains a low band coupler/detector and a high band coupler/detector. The low band coupler/detector operates from 0
to 2 GHz. The high band coupler/detector operates from > 2 GHz to 20 GHz (Option 520) or from > 2 GHz to 44 GHz (Option 532/540).
ALC Off Operation
In ALC off mode (open loop operation), only the reference voltage is used to set the modulator drive level. Since there is no detector voltage
(feedback) indicating the RF output level, the power level may drift over time and with temperature changes.
深圳德标仪器 135-1095-0799

Agilent N5161A/62A/81A/82A/83A MXG Signal Generators Service Guide
Troubleshooting
Overall Block Description
1-7
Power Search Mode Operation
Power search mode used with modulation is similar to ALC Off mode. Using pulse modulation as an example, the difference between ALC
Off mode and power search mode is that when power search is first executed, pulse modulation is turned off, and the ALC loop is closed and
leveled. The ALC loop is then opened, pulse modulation turned on, and the integrator output is maintained at the closed loop level. Since
there is no feedback in open loop operation, power can drift over time and with temperature changes.
In power search auto mode, when changes are made in frequency or power, a new search is executed.
If ALC is on during pulse operation, pulse amplitude is maintained by the ALC loop. (See the N5183A Data Sheet for pulse width
restrictions.)
Attenuator Option 1E1
The ALC circuit controls power across a finite power range. The Option 1E1 attenuator, added to the RF path after the coupler/detector,
enables the ALC to maintain leveled power over an extend power range. The signal generator performs a separate calibration to remove
losses associated with the attenuator, RF connector, and cables.
Generating Frequencies >3.2 GHz
The A3 RF assembly provides a signal to the A7 Micro Deck’s 20 GHz doubler at a frequency range of 2.5 GHz to 5 GHz. Depending on the
desired output frequencies, the 20 GHz doubler will either pass through the > 3.2 GHz to 5 GHz frequency, double the 2.5 GHz to 5 GHz
frequency (for frequencies from 5 GHz to 10 GHz), or double the 5 GHz to 10 GHz frequency (for frequencies from 10 GHz to 20 GHz).
Instruments with Option 532 or 540 have a 40 GHz doubler that doubles the 10 GHz to 20 GHz signals.
Pulse Modulation
Pulse modulation drive for all frequencies is developed on the A3 RF assembly. For frequencies > 3.2 GHz, the pulse modulator diode is in
the Mod Filter on the A7 Micro Deck.
Amplitude Modulation
The AM drive signal is generated on the A3 RF assembly, routed to the ALC assembly on the A7 Micro Deck, and then applied to the ALC
modulation diode in the Mod Filter on the A7 Micro Deck.
A8 Floating BNC Bypass (N5183A)
The A8 Floating BNC Bypass isolation circuit is a filter that minimizes interference caused when external equipment is connected to the
external ALC Input BNC. The circuit isolates DC voltage and high frequency signal components that might be present between different
grounding paths.
A9 Interface Board (N5161A/62A)
The A9 Interface board provides voltages for the front panel LEDs and the LAN Reset hardkey. N5161A/62A front panel operation is
limited to turning the signal generator on, off and/or resetting the remote communication path.
Common Circuitry for the N5181A/82A/83A
Front Panel Hardkeys and Softkeys
Some front panel keys are referred to as hardkeys and are dedicated to specific functions. Hardkeys are used to select the most commonly
used features and to control the display's contrast and intensity.
The front panel keys along the LCD display are referred to as softkeys and are used to select functions; these functions are displayed to the
left of each softkey. When you press a softkey, its displayed functionality is executed. Some softkeys have lower-level menus that are
displayed when you press the softkey.
The front panel hardkeys and softkeys use a row and column configuration. Pressing a key makes a connection between a row and a column;
the A5 CPU interprets the data and performs the appropriate action.
深圳德标仪器 135-1095-0799

Agilent N5161A/62A/81A/82A/83A MXG Signal Generators Service Guide
Troubleshooting
Overall Block Description
1-8
LCD Display
An LCD Display provides information about the signal generator’s settings and condition. The LCD Display requires a power supply,
lighting, and data. The lighting, supplied from a backlight located in the display, is powered by the A6 DC-AC Inverter Interface Board. The
LCD Display assembly uses an integrated LCD controller, located on the A3 RF assembly. The LCD controller is connected to the
Peripheral Universal Bus (PUB). The output of the display controller is connected to a low-filtered differential signaling (LVDS) transceiver
chip. The LVDS chip converts the single ended 28-bit bus into four LVDS pairs and an LVDS Clock. The LVDS Clock is routed to the front
panel through the W1 ribbon cable. W1 also routes the power supplies for the front panel, power switch, and the universal asynchronous
receiver/transmitter (UART) data lines. The UART data lines are used to communicate with the Peripheral Interface Controller (PIC)
microcontroller on the A6 DC-AC Inverter Interface Board.
深圳德标仪器 135-1095-0799

÷2
÷N.
f
÷2 to 15
ExtDet
Limi ter
÷10
Ext Ref 1MHz
to 50MHz
(Rear Panel)
X5
X2
Phase/ Freq
Det
_
+
1GHz to RF
50MHz to
FracN
RF
Output
Loop
Inte grat or
N5161A/62A/81A/82A MXG Block Diagram
3 to 6 GHz
0.25 to 3 GHz
4.7 to 6 GHz
3 to 4.7 GHz
1.55 to 2.4 GHz
2.4 to 3 GHz
1 to 1.55 GHz
0.628 to 1 GHz
0.396 to 0.628 GHz
0.25 to 0.396 GHz
I
Q
Low Band
High Band
Het Band
RF Output Section
Modulator / Filter
Reference
Synthesizer - Multiplier/Dividers
Divider / Filter
Frac-N
Second Doubler / Filter
Frac -N Engi ne
PRESTO
Multi-Modulus
Prescaler
ESOT
:N
Phase
Det
Automatic Level Control
_
Detector/
Comp
Copyright Agilent Technologies 2006-2008
Window
Comparator
SYNTH_OVER_L
FM ADC
+
-
VCO
FM
in
AM
in
+2
V
+2
V
÷2
÷2
375MHz
600MHz
950MHz
1500MH
z
0.75 to 1.5 GHz
3.0-3.8GHz
3.8-4.8GHz
4.8-6.0GHz
x2
0.25 to 3.0 GHz
0.25 to 6.0 GHz
Power
Det
350MHz 350MHz
1GHz
Int 10MHz VCT CXO
100MHz MUAT
Power
Det
Power
Det
Power
Det
Limi ter
RPP
Sense
PRETUN
E
DAC
FM DAC
MUL T_OUTPUT
100MHZ_DET
500MHZ_DET
1GHZ_DET
ALC_ MOD_ I
ALC_DET ALC_LOG_DET
ALC_REF_PLUS_AM
ALC_LOOP_INT
SYNTH_UNDER_
L
INT
OSC
DAC
Window
Comparator REF_UNLOCKED_L
TC Adj
DAC
Ref
DA
C
AM
DA
C
Temp
Sense
Window
Comparator ALC_U NLEVE LED_L
Preamp
Log Exp
L_RPP_TRIPPED_FILT
Pulse
Generator
Control
EXT_REF_ALIVE_H
5, 10, 40dB 5, 10, 40dB20dB
AT1 AT2 AT3
0.75 to 1.5 GHz
DD
S
FM_OUTPUT
AM_OUTPUT
DDS_OUTPUT
0o
90o
Power
Det
LO_DE T
QUA
D
DAC
QUAD_LOOP
PRE_LEVEL_REF
PRE_LEVEL_DETLO_MOD_DRIVE
I/Q Modulator
Power
Det
VECTOR_BRD_OUT
Pulse in
10MHz
Out
50MHz
FM
Clock
Mod Mux
Electronic
Attenuator
Baseband Bd - RF Section
Feed Forward
1.00 to 1.25 GHz
100kHz to 250MHz
50MHz fro m
Reference
3.0 to 6.0 GHz
0.25 to 3.0 GHz
10MHz
21 to 25MHz
FM from Mod Mux
Dithe r
500MHz to
Vector Bd
+5V
80MHz
0 to 10MHz
0 to 10MHz
950MHz
1500MHz
+3.3V
Log
Linear AM
Exp AM
250MHz
x5 _
+_
+
Window
Comparator ALC_DET_HEATER_FAIL_L
DET_HEATER
DET_REF
Voltage
Regulators
+15V
-15V
+10V
-10V
+PTAT
-PTAT
TC_REF
ALC Detector Temp Control
ALC Detector
Synthesizer - VCO/FracN ALC Section
Balun
1GHz from
Reference
Reference FP GA
50MHz
FM Clk
x2
First Doubler / Filter
1.5 to 3.0 GHz
0.75 to 1.5 GHz
1.5-1.9GHz
1.9-2.4GHz
2.4-3.0GHz
Waveform DDR Memory Sequ encer
Sequencer table
of segme nts
Noise
Source
Resampler R econs truction
Filters
Filter
Resa mpler
DACs
LO
÷4
Rear
Panel
BNCs
I & Q
switch
I
Q
I
Q
Baseband Board
Vector Section
Pattern
Trig ger In
1-2
4
2Marker
Rout ing
4
Event 1-4
I, Q, & Ma rkers I & Q
"Bur st Pulse"
"ALC Hold "
Front
Panel
BNCs
深圳德标仪器 135-1095-0799

Front Panel
÷2
÷N.
f
÷2 to 15
ExtDet
Limiter
÷10
Ext Ref 1MHz
to 50MHz
(Rear Panel)
X5
X2
Phase/Freq
Det
_
+
1GHz to RF
50MHz to
FracN
Low Band
Het Band
RF Output Section
Reference
Synthesizer - Multiplier/Dividers
Divider / Filter
Frac-N
Second Doubler / Filter
Frac- N Engi ne
PRESTO
Multi-Modulus
Prescaler
ESOT
:N
Phase
Det
Detector/
Comp
Window
Comparator
SYNTH_OVER_ L
FM ADC
+
-
VCO
AM
in
÷2
÷2
375MHz
600MHz
950MHz
1500MH
z
0.75 to 1.5 GHz
3.0-3 .8GHz
3.8-4.8GHz
4.8- 6.0GHz
x2
0.25 to 3.0 GHz
0.25 t o 6.0 GHz
Power
Det
350MHz 3 50MHz
1GHz
Int 10MHz VCT CXO
100MHz MUAT
Power
Det
Power
Det
Power
Det
Limiter
PRETUN
E
DAC
FM DAC
MULT_OUTPUT
100MHZ_DET
500MHZ_DET
1GHZ_DET
SYNTH_UNDER _
L
INT
OSC
DAC
Window
Comparator REF_UNLOCK ED_L
Pulse
Generator
Control
EXT_REF_AL IVE_H
0.75 to 1.5 GHz
Pulse in
10MHz
Out
50MH z
FM
Clock
1.00 to 1.25 GHz
100kHz to 250MHz
50MHz from
Reference
0.25 to 3.0 GHz
10MHz
21 to 25MHz
FM from Mod Mux
Dither
500MHz to
Vector Bd
+5V
80MHz
950MHz
1500MHz
+3.3V
250MHz
Synthesizer - VCO/FracN
1GHz from
Reference
Reference FPG A
50MHz
FM Clk
x2
First Doubler / Filter
1.5 to 3.0 GHz
0.75 to 1.5 GHz
1.5-1 .9GHz
1.9-2.4GHz
2.4- 3.0GHz
20 GHz Frequency Multiplier
X2
10-20
2.5-5.0 GHz
Input
10-20
X2
5-8
NC 3.2-10 GHz
X2
3.2-5 GHz
3.2-10 GHz
EXT Det.
Log Amp
LEVEL
DAC
MOD Driver
LB MOD
ALC
AM In
LB Det
HB Det
Ext Det
J15
J13
J6
2-20 GHz
or 2-44 GHz
Coupl er
Output
Step
Attenuator
RF Out
ALC Pulse
Mod Filter
MODF_PATH
5-8
13-20
8-13
3-5
0-20 GHz
3.2
MODF_PLS_ENB_L
MODF_AMP_ON_H
10-20 GHz
X2
Doubl er
40 GHz Doubler Microcircuit
20-26
32-40
26-32
30 or 40
0-40
GHz
20-40
GHz
10-20 GHz
DBL40_AMP
DBL40_BIAS
DBL40_PATH
DBL40_LPF
0-20
GHz
0-2 GHz ALC Det
(E8251-60210)
Hi-band
Detector
Loop
Integrator
ALC
_
ALC_MOD_I
ALC_DET A LC_LOG_DET
ALC_REF_PLU S_AM
ALC_LOOP_INT
TC Adj
DAC
Ref
DA
C
AM
DA
C
Temp
Sense
Window
Comparator ALC_UN LEVELED_L
Preamp
Log Exp
Feed Forward
Log
Linear AM
Exp AM
x5 _
+
Voltage
Regulators
+15V
-15V
+10V
-10V
+PTAT
-PTAT
TC_REF
FM in
CPU
Power Supply
OutIn
N5183A MXG Block Diagram
Copyright Agilent Technologies 2007
J4
J7
J1
J6 J7 J3
J2
J4
J1
J3
J2
Detector Output
A3 RF Assembly
A7 Micro Deck
深圳德标仪器 135-1095-0799