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Service Manual
Agilent 4395A Network/Spectrum/Impedance Analyzer

SERIAL NUMBERS

This manual applies directly to instruments with serial number
pre x JP1KE02197 or above, and MY41100220 or above.
For additional important information about serial
numbers, read \Serial Number" in Appendix A.

Agilent Part No. 04395-90120

Printed in Japan August 2002

Fifth Edition
Notice

The information contained in this document is subject to change without notice.
This document contains proprietary information that is protected by copyright. All rights are
reserved. No part of this document may be photocopied, reproduced, or translated to another
language without the prior written consent of the Agilent Technologies Company.
Agilent Technologies Japan, LTD.
Kobe Instrument Division
1-3-2, Murotani, Nishi-Ku, Kobe-shi,
Hyogo, 651-2241 Japan

Copyright 1998, 2000-2002 Agilent Technologies Japan, Ltd.
c
Manual Printing History

The manual's printing date and part number indicate its current edition. The printing date
changes when a new edition is printed. (Minor corrections and updates that are incorporated
at reprint do not cause the date to change.) The manual part number changes when extensive
technical changes are incorporated.
February 1998 : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : First Edition (Part Number 04395-90100)
September 1998 : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : Second Edition (Part Number 04395-90110)
June 2000 : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : Third Edition (Part Number 04395-90110)
March 2001 : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : Fourth Edition (Part Number 04395-90110)
August 2002 : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : Fifth Edition (Part Number 04395-90120)

iii
Safety Summary

The following general safety precautions must be observed during all phases of operation,
service, and repair of this instrument. Failure to comply with these precautions or with
speci c WARNINGS elsewhere in this manual may impair the protection provided by the
equipment. In addition it violates safety standards of design, manufacture, and intended use
of the instrument.
The Agilent Technologies Company assumes no liability for the customer's failure to comply
with these requirements.

Note 4395A comply with INSTALLATION CATEGORY II and POLLUTION
DEGREE 2 in IEC1010-1. 4395A are INDOOR USE product.

Note LEDs in 4395A are Class 1 in accordance with IEC825-1.
CLASS 1 LED PRODUCT

Ground The Instrument

To avoid electric shock hazard, the instrument chassis and cabinet must be connected to a
safety earth ground by the supplied power cable with earth blade.
DO NOT Operate In An Explosive Atmosphere

Do not operate the instrument in the presence of ammable gasses or fumes. Operation of any
electrical instrument in such an environment constitutes a de nite safety hazard.
Keep Away From Live Circuits

Operating personnel must not remove instrument covers. Component replacement and
internal adjustments must be made by quali ed maintenance personnel. Do not replace
components with the power cable connected. Under certain conditions, dangerous voltages
may exist even with the power cable removed. To avoid injuries, always disconnect power and
discharge circuits before touching them.
DO NOT Service Or Adjust Alone

Do not attempt internal service or adjustment unless another person, capable of rendering
rst aid and resuscitation, is present.

iv
DO NOT Substitute Parts Or Modify Instrument

Because of the danger of introducing additional hazards, do not install substitute parts or
perform unauthorized modi cations to the instrument. Return the instrument to a Agilent
Technologies Sales and Service Oce for service and repair to ensure that safety features are
maintained.
Dangerous Procedure Warnings

Warnings , such as the example below, precede potentially dangerous procedures throughout
this manual. Instructions contained in the warnings must be followed.
Warning Dangerous voltages, capable of causing death, are present in this instrument.

Use extreme caution when handling, testing, and adjusting this instrument.

Safety Symbols

General de nitions of safety symbols used on equipment or in manuals are listed below.
Instruction manual symbol: the product is marked with this symbol when it is
necessary for the user to refer to the instruction manual.
Alternating current.
Direct current.
On (Supply).
O (Supply).

In position of push-button switch.
Out position of push-button switch.

Frame (or chassis) terminal. A connection to the frame (chassis) of the
equipment which normally include all exposed metal structures.
This Warning sign denotes a hazard. It calls attention to a procedure,
practice, condition or the like, which, if not correctly performed or adhered to,
could result in injury or death to personnel.
This Caution sign denotes a hazard. It calls attention to a procedure,
practice, condition or the like, which, if not correctly performed or adhered to,
could result in damage to or destruction of part or all of the product.
This Note sigh denotes important information. It calls attention to a
procedure, practice, condition or the like, which is essential to highlight.

Axed to product containing static sensitive devices use anti-static handling
procedures to prevent electrostatic discharge damage to component.

v
Certification

Agilent Technologies Company certi es that this product met its published speci cations
at the time of shipment from the factory. Agilent Technologies further certi es that its
calibration measurements are traceable to the United States National Institute of Standards
and Technology, to the extent allowed by the Institution's calibration facility, or to the
calibration facilities of other International Standards Organization members.

Warranty

This Agilent Technologies instrument product is warranted against defects in material and
workmanship for a period of one year from the date of shipment, except that in the case of
certain components listed in General Information of this manual, the warranty shall be for
the speci ed period. During the warranty period, Agilent Technologies Company will, at its
option, either repair or replace products that prove to be defective.
For warranty service or repair, this product must be returned to a service facility designated
by Agilent Technologies. Buyer shall prepay shipping charges to Agilent Technologies and
Agilent Technologies shall pay shipping charges to return the product to Buyer. However,
Buyer shall pay all shipping charges, duties, and taxes for products returned to Agilent
Technologies from another country.
Agilent Technologies warrants that its software and rmware designated by Agilent
Technologies for use with an instrument will execute its programming instruction when
property installed on that instrument. Agilent Technologies does not warrant that the
operation of the instrument, or software, or rmware will be uninterrupted or error free.

Limitation Of Warranty

The foregoing warranty shall not apply to defects resulting from improper or inadequate
maintenance by Buyer, Buyer-supplied software or interfacing, unauthorized modi cation or
misuse, operation outside the environmental speci cations for the product, or improper site
preparation or maintenance.
No other warranty is expressed or implied. Agilent Technologies speci cally disclaims the
implied warranties of merchantability and tness for a particular purpose.

vi
Exclusive Remedies

The remedies provided herein are buyer's sole and exclusive remedies. Agilent Technologies
shall not be liable for any direct, indirect, special, incidental, or consequential damages, whether
based on contract, tort, or any other legal theory.

Assistance

Product maintenance agreements and other customer assistance agreements are available for
Agilent Technologies products.
For any assistance, contact your nearest Agilent Technologies Sales and Service Oce.
Addresses are provided at the back of this manual.

vii
Typeface Conventions

Bold Boldface type is used when a term is de ned. For example: icons are
symbols.
Italics Italic type is used for emphasis and for titles of manuals and other
publications.
Italic type is also used for keyboard entries when a name or a variable
must be typed in place of the words in italics. For example: copy
lename means to type the word copy, to type a space, and then to
type the name of a le such as file1.
Computer Computer font is used for on-screen prompts and messages.
4HARDKEYS5 Labeled keys on the instrument front panel are enclosed in 4 5.
Softkeys located to the right of the CRT are enclosed in .
NNNNNNNNNNNNNNNNNNNNNNNNNN NNNNN

SOFTKEYS

viii
Documentation Map

The following manuals are available for the analyzer.
Operation Manual (Agilent Part Number 04395-90020)
The Operation Manual describes all function accessed from the front panel keys and softkeys. It
also provides information on options and accessories available, speci cations, system
performance, and some topics about the analyzer's features.
Programming Manual (Agilent Part Number 04395-90021)
The Programming Manual shows how to write and use BASIC program to control the analyzer
and describes how HP Instrument BASIC works with the analyzer..
HP Instrument BASIC Users Handbook (Agilent Part Number E2083-90005)
The HP Instrument BASIC User's Handbook introduces you to the HP Instrument BASIC
programming language, provide some helpful hints on getting the most use from it, and provide
a general programming reference. It is divided into three books, HP Instrument BASIC
Programming Techniques , HP Instrument BASIC Interface Techniques , and HP Instrument
BASIC Language Reference .
Service Manual (Option 0BW only), (Agilent Part Number 04395-90120)
The Service Manual explains how to adjust, troubleshoot, and repair the instrument. This
manual is option 0BW only.

ix
Contents
1. General Information
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
ORGANIZATION OF SERVICE MANUAL . . . . . . . . . . . . . . . 1-1
PERFORMANCE TESTS . . . . . . . . . . . . . . . . . . . . . . . 1-3
CALIBRATION CYCLE . . . . . . . . . . . . . . . . . . . . . . . 1-4
CALCULATION SHEET AND PERFORMANCE TEST RECORD . . . . . 1-4
Calculation Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Performance Test Record . . . . . . . . . . . . . . . . . . . . . . 1-4
How to Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
RECOMMENDED TEST EQUIPMENT . . . . . . . . . . . . . . . . 1-5
Calibration Data Required for Step Attenuator . . . . . . . . . . . . . 1-6
2. Performance Tests
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
1. FREQUENCY ACCURACY TEST (NA) . . . . . . . . . . . . . . . 2-2
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Speci cation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2. SOURCE LEVEL ACCURACY/FLATNESS TEST (NA) . . . . . . . . 2-4
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Speci cation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
3. NON-SWEEP POWER LINEARITY TEST (NA) . . . . . . . . . . . 2-8
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Speci cation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
4. POWER SWEEP LINEARITY TEST (NA) . . . . . . . . . . . . . . 2-11
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Speci cation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
5. HARMONICS/NON-HARMONIC SPURIOUS TEST (NA) . . . . . . . 2-15
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Speci cation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
6. DC BIAS TEST (NA) (Option 001) . . . . . . . . . . . . . . . . . 2-18
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
Speci cation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18

Contents-1
Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
7. RECEIVER NOISE LEVEL TEST (NA) . . . . . . . . . . . . . . . 2-21
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21
Speci cation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21
Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21
8. INPUT CROSSTALK TEST (NA) . . . . . . . . . . . . . . . . . . 2-24
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24
Speci cation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24
Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24
9. INPUT IMPEDANCE TEST (NA) . . . . . . . . . . . . . . . . . . 2-27
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27
Speci cation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27
Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27
10. ABSOLUTE AMPLITUDE ACCURACY TEST (NA) . . . . . . . . . 2-31
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-31
Speci cation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-31
Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-31
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-31
11. MAGNITUDE RATIO/PHASE DYNAMIC ACCURACY TEST (NA) . . 2-36
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-36
Speci cation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-36
Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-36
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-37
12. MAGNITUDE RATIO/PHASE FREQUENCY RESPONSE TEST (NA) . 2-45
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-45
Speci cation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-45
Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-45
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-45
13. DISPLAYED AVERAGE NOISE LEVEL TEST (SA) . . . . . . . . . 2-50
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-50
Speci cation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-50
Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-50
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-50
14. AMPLITUDE FIDELITY TEST (SA) . . . . . . . . . . . . . . . . 2-53
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-53
Speci cation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-53
Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-53
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-54
15. INPUT ATTENUATOR SWITCHING UNCERTAINTY TEST (SA) . . 2-58
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-58
Speci cation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-58
Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-58
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-58
16. NOISE SIDEBANDS TEST (SA) . . . . . . . . . . . . . . . . . . 2-61
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-61
Speci cation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-61
Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-61
Contents-2
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-61
17. AMPLITUDE ACCURACY/FREQUENCY RESPONSE TEST (SA) . . 2-65
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-65
Speci cation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-65
Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-65
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-65
18. SECOND HARMONIC DISTORTION TEST (SA) . . . . . . . . . . 2-71
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-71
Speci cation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-71
Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-71
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-71
19. THIRD ORDER INTERMODULATION DISTORTION TEST (SA) . . 2-73
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-73
Speci cation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-73
Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-73
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-73
20. OTHER SPURIOUS (SA) . . . . . . . . . . . . . . . . . . . . . 2-76
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-76
Speci cation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-76
Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-76
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-76
21. RESIDUAL RESPONSE TEST (SA) . . . . . . . . . . . . . . . . 2-79
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-79
Speci cation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-79
Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-79
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-79
3. Calculation Sheet
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
2. SOURCE LEVEL ACCURACY/FLATNESS TEST . . . . . . . . . . 3-1
Level Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Level Flatness . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3. NON-SWEEP POWER LINEARITY TEST . . . . . . . . . . . . . . 3-3
Reference (0 dBm) . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Non-Sweep Power Linearity . . . . . . . . . . . . . . . . . . . . . 3-3
4. POWER SWEEP LINEARITY TEST . . . . . . . . . . . . . . . . 3-4
6. DC BIAS TEST (Option 001) . . . . . . . . . . . . . . . . . . . . 3-5
DC Bias Voltage Level Accuracy . . . . . . . . . . . . . . . . . . . 3-5
DC Bias Current Level Accuracy . . . . . . . . . . . . . . . . . . . 3-5
7. RECEIVER NOISE LEVEL TEST . . . . . . . . . . . . . . . . . . 3-6
8. INPUT CROSSTALK TEST . . . . . . . . . . . . . . . . . . . . . 3-7
10 Hz Freq. > 1 kHz . . . . . . . . . . . . . . . . . . . . . . . 3-7
1 kHz Freq. > 100 kHz . . . . . . . . . . . . . . . . . . . . . . 3-7
100 kHz Freq. 500 kHz . . . . . . . . . . . . . . . . . . . . . 3-7
10. ABSOLUTE AMPLITUDE ACCURACY TEST . . . . . . . . . . . 3-8
Input R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Input A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Input B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
11. MAGNITUDE RATIO/PHASE DYNAMIC ACCURACY TEST . . . . 3-11
Step Attenuator Calibration Value at 50 MHz . . . . . . . . . . . . . 3-11
A/R Measurement . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
Contents-3
B/R Measurement . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
13. DISPLAYED AVERAGE NOISE LEVEL TEST . . . . . . . . . . . 3-12
Input R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
Input A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
Input B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
14. AMPLITUDE FIDELITY . . . . . . . . . . . . . . . . . . . . . 3-14
Step Attenuator Calibration Value at 50 MHz . . . . . . . . . . . . . 3-14
Amplitude Fidelity . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
Input R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
Input A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
Input B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Input R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Input A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Input B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
15. INPUT ATTENUATOR SWITCHING UNCERTAINTY TEST . . . . . 3-16
Step Attenuator Calibration Value at 50 MHz . . . . . . . . . . . . . 3-16
Input Attenuator Switching Uncertainty . . . . . . . . . . . . . . . . 3-16
Input R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
Input A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
Input B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
17. AMPLITUDE ACCURACY/FREQUENCY RESPONSE TEST . . . . . 3-18
Input R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
Reference at 50 MHz . . . . . . . . . . . . . . . . . . . . . . . . 3-18
At Frequencies 1 MHz . . . . . . . . . . . . . . . . . . . . . . . 3-19
At Frequencies < 1 MHz . . . . . . . . . . . . . . . . . . . . . . . 3-20
Input A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20
Reference at 50 MHz . . . . . . . . . . . . . . . . . . . . . . . . 3-20
At Frequencies 1 MHz . . . . . . . . . . . . . . . . . . . . . . . 3-21
At Frequencies < 1 MHz . . . . . . . . . . . . . . . . . . . . . . . 3-22
Input B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22
Reference at 50 MHz . . . . . . . . . . . . . . . . . . . . . . . . 3-22
At Frequencies 1 MHz . . . . . . . . . . . . . . . . . . . . . . . 3-23
At Frequencies < 1 MHz . . . . . . . . . . . . . . . . . . . . . . . 3-24
18. THIRD ORDER HARMONIC DISTORTION TEST . . . . . . . . . 3-24
4. Performance Test Record
1. FREQUENCY ACCURACY TEST . . . . . . . . . . . . . . . . . . 4-1
without Option 1D5 . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
with Option 1D5 . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
2. SOURCE LEVEL ACCURACY/FLATNESS TEST . . . . . . . . . . 4-2
Level Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Level Flatness . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
3. NON SWEEP POWER LINEARITY TEST . . . . . . . . . . . . . . 4-3
4. POWER SWEEP LINEARITY TEST . . . . . . . . . . . . . . . . 4-3
5. HARMONICS/NON-HARMONIC SPURIOUS TEST . . . . . . . . . . 4-4
Harmonics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Non-Harmonic Spurious . . . . . . . . . . . . . . . . . . . . . . . 4-4
6. DC BIAS ACCURACY TEST . . . . . . . . . . . . . . . . . . . . 4-5
7. RECEIVER NOISE LEVEL TEST . . . . . . . . . . . . . . . . . . 4-6
8. INPUT CROSSTALK TEST . . . . . . . . . . . . . . . . . . . . . 4-7
10 Hz Freq. < 1 kHz . . . . . . . . . . . . . . . . . . . . . . . 4-7
Contents-4
1 kHz Freq. < 100 kHz . . . . . . . . . . . . . . . . . . . . . . 4-7
100 kHz Freq. 500 MHz . . . . . . . . . . . . . . . . . . . . . 4-7
9. INPUT IMPEDANCE TEST . . . . . . . . . . . . . . . . . . . . 4-7
100 kHz Freq. 100 MHz . . . . . . . . . . . . . . . . . . . . . 4-7
100 MHz < Freq. 500 MHz . . . . . . . . . . . . . . . . . . . . 4-7
10. ABSOLUTE AMPLITUDE ACCURACY TEST . . . . . . . . . . . 4-8
Input R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Input A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Input B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
11. MAGNITUDE RATIO/PHASE DYNAMIC ACCURACY TEST . . . . 4-11
A/R Measurement . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
B/R Measurement . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
12. MAGNITUDE RATIO/PHASE FREQUENCY RESPONSE TEST . . . 4-13
A/R Measurement . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
B/R Measurement . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
13. DISPLAYED AVERAGE NOISE LEVEL TEST . . . . . . . . . . . 4-13
Input R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Input A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
Input B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
14. AMPLITUDE FIDELITY TEST . . . . . . . . . . . . . . . . . . 4-14
Input R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
Input A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
Input B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
15. INPUT ATTENUATOR SWITCHING UNCERTAINTY TEST . . . . . 4-16
Input R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
Input A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
Input B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
16. NOISE SIDEBANDS TEST . . . . . . . . . . . . . . . . . . . . 4-17
Input R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
17. AMPLITUDE ACCURACY/FREQUENCY RESPONSE TEST . . . . . 4-18
Input R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
Level Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
Frequency Response . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
Input A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19
Level Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19
Frequency Response . . . . . . . . . . . . . . . . . . . . . . . . . 4-20
Input B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21
Level Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21
Frequency Response . . . . . . . . . . . . . . . . . . . . . . . . . 4-22
18. SECOND HARMONIC DISTORTION TEST . . . . . . . . . . . . . 4-23
19. THIRD ORDER INTERMODULATION DISTORTION TEST . . . . . 4-23
20. OTHER SPURIOUS TEST . . . . . . . . . . . . . . . . . . . . . 4-24
21. RESIDUAL RESPONSE TEST . . . . . . . . . . . . . . . . . . . 4-24

Contents-5
5. Adjustments
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Required Controller . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Windows NT PC (Personal Computer) . . . . . . . . . . . . . . . . 5-2
Software Requirements . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Required Test Equipment . . . . . . . . . . . . . . . . . . . . . . . 5-3
Order of Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Performing Adjustments . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Setting Up the System . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Preparation for Using the Adjustment Program . . . . . . . . . . . . . . 5-6
Installing an GPIB Card (82340 or 82341) . . . . . . . . . . . . . . . 5-6
Installing HP VEE for Windows NT . . . . . . . . . . . . . . . . . . 5-6
Installing Adjustment Program into Your PC . . . . . . . . . . . . . . 5-6
Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
1. Frequency Reference Adjustment . . . . . . . . . . . . . . . . . . . 5-8
Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . 5-8
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
2. Oven Reference Adjustment (Option 1D5) . . . . . . . . . . . . . . . 5-10
Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . 5-10
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10
Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . 5-10
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10
3. Local DAC Adjustment . . . . . . . . . . . . . . . . . . . . . . . 5-13
Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . 5-13
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13
4. Source Power Adjustment . . . . . . . . . . . . . . . . . . . . . . 5-14
Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . 5-14
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14
5. Source Flatness Adjustment . . . . . . . . . . . . . . . . . . . . . 5-15
Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . 5-15
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15
6. Input DC Oset Adjustment . . . . . . . . . . . . . . . . . . . . . 5-16
Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . 5-16
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16
7. Input Local Null Adjustment . . . . . . . . . . . . . . . . . . . . 5-18
Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . 5-18
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-18
8. IF 24 dB Gain/Phase Adjustment . . . . . . . . . . . . . . . . . . 5-20
Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . 5-20
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-20
9. Receiver Gain Adjustment . . . . . . . . . . . . . . . . . . . . . . 5-22
Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . 5-22
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-22
10. IF 8 dB/16 dB Gain Adjustment . . . . . . . . . . . . . . . . . . 5-25
Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . 5-25
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-25
11. Temperature Adjustment . . . . . . . . . . . . . . . . . . . . . . 5-26
Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . 5-26
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-26
12. Receiver Flatness Adjustment . . . . . . . . . . . . . . . . . . . . 5-27
Contents-6
Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . 5-27
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-27
13. Receiver Attenuator Adjustment . . . . . . . . . . . . . . . . . . 5-29
Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . 5-29
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-29
14. IF BPF Flatness Adjustment . . . . . . . . . . . . . . . . . . . . 5-30
Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . 5-30
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-30
15. DC Bias Adjustment (Option 010) . . . . . . . . . . . . . . . . . . 5-31
Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . 5-31
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-31
6. Troubleshooting
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
TROUBLESHOOTING SUMMARY . . . . . . . . . . . . . . . . . . 6-1
START HERE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
INSPECT THE POWER ON SEQUENCE . . . . . . . . . . . . . . . . 6-4
Check the Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Check the Front Panel LEDs and Displays . . . . . . . . . . . . . . . 6-4
Check Error Message . . . . . . . . . . . . . . . . . . . . . . . . 6-4
INSPECT THE REAR PANEL FEATURE . . . . . . . . . . . . . . . 6-5
Check the GPIB Interface . . . . . . . . . . . . . . . . . . . . . . 6-5
Check the Parallel Interface . . . . . . . . . . . . . . . . . . . . . 6-5
Check the mini DIN Keyboard Connector . . . . . . . . . . . . . . . 6-5
Internal Tests Failure Troubleshooting . . . . . . . . . . . . . . . . . . 6-6
Check the Power-On Selftest . . . . . . . . . . . . . . . . . . . . . 6-6
Execute All Internal Tests . . . . . . . . . . . . . . . . . . . . . . 6-6
Execute the Individual Test . . . . . . . . . . . . . . . . . . . . . 6-6
External Tests Failure Troubleshooting . . . . . . . . . . . . . . . . . 6-8
Performance Tests Failure Troubleshooting . . . . . . . . . . . . . . . . 6-9
Perform Adjustments and Correction Constants . . . . . . . . . . . . . 6-9
7. Power Supply Troubleshooting
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
START HERE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
1. Check the Fan is Rotating . . . . . . . . . . . . . . . . . . . . . 7-3
2. Check the A50 SHUTDOWN LED . . . . . . . . . . . . . . . . . 7-3
A50 Shutdown LED . . . . . . . . . . . . . . . . . . . . . . . . 7-4
3. Check the A1 +5 VD LED . . . . . . . . . . . . . . . . . . . . 7-4
Measure the A1 +5 VD Voltage . . . . . . . . . . . . . . . . . . 7-5
FIND OUT WHY THE FAN IS NOT ROTATING . . . . . . . . . . . . 7-6
1. Check the Line Voltage, Selector Switch Setting, and Fuse . . . . . . . 7-6
2. Check the A50 SHUTDOWN LED . . . . . . . . . . . . . . . . . 7-6
FIND OUT WHY THE A50 SHUTDOWN LED IS OFF . . . . . . . . . 7-7
1. Disconnect the Cable from the A1J10 . . . . . . . . . . . . . . . . 7-7
2. Remove Assemblies . . . . . . . . . . . . . . . . . . . . . . . . 7-7
3. Disconnect the Cable from the A9J2 . . . . . . . . . . . . . . . . 7-7
FIND OUT WHY THE A1 +5 VD LED IS NOT ON STEADILY . . . . . 7-9
1. Check the A40 Pre-Regulator . . . . . . . . . . . . . . . . . . . 7-9
2. Check the A50 DC-DC Converter . . . . . . . . . . . . . . . . . 7-9
3. Disconnect Cables on the A1 CPU . . . . . . . . . . . . . . . . . 7-10
Contents-7
4. Remove Assemblies . . . . . . . . . . . . . . . . . . . . . . . . 7-11
5. Remove Assemblies . . . . . . . . . . . . . . . . . . . . . . . . 7-11
TROUBLESHOOT THE FAN AND THE A50 DC-DC CONVERTER . . . 7-12
1. Troubleshoot the Fan . . . . . . . . . . . . . . . . . . . . . . . 7-12
2. Troubleshoot the A50 DC-DC Converter . . . . . . . . . . . . . . 7-13
8. Digital Control Troubleshooting
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
A1 CPU Replacement . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
FIRMWARE INSTALLATION . . . . . . . . . . . . . . . . . . . . . 8-4
Ordering the Firmware Diskette . . . . . . . . . . . . . . . . . . . 8-4
Installing the Firmware . . . . . . . . . . . . . . . . . . . . . . . 8-4
START HERE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-6
1. Check the Power-On Sequence . . . . . . . . . . . . . . . . . . . 8-6
Check the 4Ch 15 and 4Ch 25 Operations . . . . . . . . . . . . . . . . 8-6
Check the A1 Eight LEDs . . . . . . . . . . . . . . . . . . . . . 8-6
2. Check Error Messages . . . . . . . . . . . . . . . . . . . . . . . 8-7
3. Check the A1 DRAM and Flash Memory . . . . . . . . . . . . . . 8-8
4. Check the A1 Volatile Memory . . . . . . . . . . . . . . . . . . . 8-9
5. Check the A30 Front Keyboard . . . . . . . . . . . . . . . . . . 8-10
6. Check the A53 FDD . . . . . . . . . . . . . . . . . . . . . . . 8-10
7. Check the A32 I-BASIC Interface and the mini DIN Keyboard . . . . . 8-10
8. Check the A33 EXT I/O Interface . . . . . . . . . . . . . . . . . 8-11
TROUBLESHOOT THE A51 GSP and A52 LCD . . . . . . . . . . . . . 8-12
1. Run the Internal Test 3: A51 GSP. . . . . . . . . . . . . . . . . . 8-12
2. Check the A52 LCD(Liquid Crystal Display) . . . . . . . . . . . . . 8-12
9. Accessories Troubleshooting
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
VERIFY OPERATIONS . . . . . . . . . . . . . . . . . . . . . . . . 9-2
Using 75
Connectors with 50
Connectors . . . . . . . . . . . . . . 9-2
Large Spurious Signals in the Spectrum Measurement . . . . . . . . . . 9-2
Odd Appearing Opens and Shorts in the Network Measurement . . . . . . 9-2
INSPECT THE CONNECTORS . . . . . . . . . . . . . . . . . . . . 9-3
INSPECT THE ACCESSORIES . . . . . . . . . . . . . . . . . . . . 9-4
Verify the Probe Power . . . . . . . . . . . . . . . . . . . . . . . 9-4
Inspect the Test Set . . . . . . . . . . . . . . . . . . . . . . . . . 9-5
Inspect the Calibration Kit . . . . . . . . . . . . . . . . . . . . . . 9-5
Verify Shorts and Opens . . . . . . . . . . . . . . . . . . . . . . 9-5
10. Replaceable Parts
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . 10-1
Direct Mail Order System . . . . . . . . . . . . . . . . . . . . . . 10-1
Exchange Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . 10-2
Replaceable Parts List . . . . . . . . . . . . . . . . . . . . . . . . . 10-2

Contents-8
11. Post Repair Procedures
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1
POST REPAIR PROCEDURES . . . . . . . . . . . . . . . . . . . . 11-1
A. Manual Changes
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Manual Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Change 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3
Change 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7
Change 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8
Change 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9
Fuse Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . A-10
Change 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-11
Change 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-13
Serial Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-17
B. Power Requirement
Replacing Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Fuse Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
Power Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
Messages
Error Messages in Alphabetical Order . . . . . . . . . . . . . . . . . Messages-1
.
Error Messages in Numerical Order . . . . . . . . . . . . . . . . . Messages-16
. .
Index

Contents-9
Figures
2-1. Frequency Accuracy Test Setup . . . . . . . . . . . . . . . . . . . . 2-3
2-2. Source Level Accuracy Test Setup . . . . . . . . . . . . . . . . . . . 2-5
2-3. Source Level Flatness Test Setup . . . . . . . . . . . . . . . . . . . 2-6
2-4. Non-sweep Power Linearity Test Setup . . . . . . . . . . . . . . . . . 2-9
2-5. Power Sweep Linearity Test Setup . . . . . . . . . . . . . . . . . . 2-12
2-6. Harmonics Test Setup . . . . . . . . . . . . . . . . . . . . . . . . 2-15
2-7. DC Bias Voltage Level Test Setup . . . . . . . . . . . . . . . . . . . 2-18
2-8. DC Bias Current Level Test Setup . . . . . . . . . . . . . . . . . . 2-20
2-9. Receiver Noise Level Test Setup . . . . . . . . . . . . . . . . . . . 2-21
2-10. Input Crosstalk Test Setup . . . . . . . . . . . . . . . . . . . . . . 2-24
2-11. Impedance Test Setup . . . . . . . . . . . . . . . . . . . . . . . . 2-28
2-12. Absolute Amplitude Accuracy Test Setup 1 . . . . . . . . . . . . . . 2-32
2-13. Absolute Amplitude Accuracy Test Setup 2 . . . . . . . . . . . . . . 2-34
2-14. A/R Magnitude Ratio/Phase Dynamic Accuracy Test Setup 1 . . . . . . 2-37
2-15. A/R Magnitude Ratio/Phase Dynamic Accuracy Test Setup 2 . . . . . . 2-39
2-16. B/R Magnitude Ratio/Phase Dynamic Accuracy Test Setup 1 . . . . . . 2-41
2-17. B/R Magnitude Ratio/Phase Dynamic Accuracy Test Setup 2 . . . . . . 2-43
2-18. A/R Magnitude Ratio/Phase Frequency Response Test Setup . . . . . . 2-46
2-19. B/R Magnitude Ratio/Phase Frequency Response Test Setup . . . . . . . 2-48
2-20. Average Noise Level Test Setup . . . . . . . . . . . . . . . . . . . . 2-50
2-21. Amplitude Fidelity Test Setup 1 . . . . . . . . . . . . . . . . . . . 2-54
2-22. Input Attenuator Accuracy Test Setup . . . . . . . . . . . . . . . . . 2-59
2-23. Noise Sidebands Test Setup . . . . . . . . . . . . . . . . . . . . . 2-62
2-24. Frequency Response Test Setup 1 . . . . . . . . . . . . . . . . . . . 2-66
2-25. Frequency Response Test Setup 2 . . . . . . . . . . . . . . . . . . . 2-68
2-26. Frequency Response Test Setup 3 . . . . . . . . . . . . . . . . . . . 2-69
2-27. Second Harmonics Distortion Test Setup . . . . . . . . . . . . . . . . 2-72
2-28. Third Order Intermodulation Distortion Test Setup . . . . . . . . . . . 2-74
2-29. Other Spurious Test Setup . . . . . . . . . . . . . . . . . . . . . . 2-77
2-30. Residual Response Test Setup . . . . . . . . . . . . . . . . . . . . 2-79
5-1. Adjustment Hardware Setup . . . . . . . . . . . . . . . . . . . . . 5-5
5-2. List Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
5-3. Frequency Reference Adjustment Setup . . . . . . . . . . . . . . . . 5-8
5-4. Frequency Reference Adjustment Location . . . . . . . . . . . . . . . 5-9
5-5. Oven Reference Adjustment Setup . . . . . . . . . . . . . . . . . . 5-11
5-6. Location of the OVEN FREQ ADJ. . . . . . . . . . . . . . . . . . . 5-11
5-7. Source Power Adjustment Setup . . . . . . . . . . . . . . . . . . . 5-14
5-8. Input DC Oset Adjustment Location . . . . . . . . . . . . . . . . . 5-17
5-9. Input Local Null Adjustment Location . . . . . . . . . . . . . . . . . 5-19
5-10. IF 24 dB Gain/Phase Adjustment Setup . . . . . . . . . . . . . . . . 5-20
5-11. IF 24 dB Gain/Phase Adjustment Location . . . . . . . . . . . . . . 5-21
5-12. Receiver Gain Adjustment Setup . . . . . . . . . . . . . . . . . . . 5-23

Contents-10
5-13. Receiver Gain Adjustment Location . . . . . . . . . . . . . . . . . . 5-24
5-14. IF 8 dB/16 dB Gain Adjustment Setup . . . . . . . . . . . . . . . . 5-25
5-15. Receiver Flatness Adjustment Setup (< 1 MHz) . . . . . . . . . . . . 5-27
5-16. Receiver Flatness Adjustment Setup ( 1 MHz) . . . . . . . . . . . . 5-28
5-17. Receiver Attenuator Adjustment Setup . . . . . . . . . . . . . . . . 5-29
5-18. IF BPF Flatness Adjustment Setup . . . . . . . . . . . . . . . . . . 5-30
5-19. DC Bias Adjustment Setup 1 . . . . . . . . . . . . . . . . . . . . . 5-31
5-20. DC Bias Adjustment Setup 2 . . . . . . . . . . . . . . . . . . . . . 5-32
6-1. Troubleshooting Organization . . . . . . . . . . . . . . . . . . . . 6-2
7-1. Power Supply Lines Simpli ed Block Diagram . . . . . . . . . . . . . 7-2
7-2. A50 SHUTDOWN LED Location . . . . . . . . . . . . . . . . . . . 7-3
7-3. A1 +5 VD LED Location . . . . . . . . . . . . . . . . . . . . . . 7-4
7-4. Removing Line Fuse . . . . . . . . . . . . . . . . . . . . . . . . . 7-6
7-5. A1 CPU Connector Locations . . . . . . . . . . . . . . . . . . . . 7-8
7-6. A40J1 Output Voltage . . . . . . . . . . . . . . . . . . . . . . . . 7-9
7-7. A1 CPU Connector Locations . . . . . . . . . . . . . . . . . . . . 7-10
7-8. Fan Troubleshooting Setup . . . . . . . . . . . . . . . . . . . . . . 7-12
7-9. A50 DC-DC Converter Troubleshooting Setup . . . . . . . . . . . . . 7-13
8-1. Digital Control Group Simpli ed Block Diagram . . . . . . . . . . . . 8-2
8-2. A1 EEPROM Location . . . . . . . . . . . . . . . . . . . . . . . 8-3
8-3. Firmware Revision Label . . . . . . . . . . . . . . . . . . . . . . . 8-4
8-4. Bootloader Menu Display . . . . . . . . . . . . . . . . . . . . . . 8-5
8-5. A1 Eight LEDs' Pattern . . . . . . . . . . . . . . . . . . . . . . . 8-7
8-6. Bootloader Display . . . . . . . . . . . . . . . . . . . . . . . . . 8-9
9-1. Probe Power Connector Voltages . . . . . . . . . . . . . . . . . . . 9-5
10-1. Top View (Major Assemblies) . . . . . . . . . . . . . . . . . . . . 10-4
10-2. Bottom View (Major Assemblies) . . . . . . . . . . . . . . . . . . . 10-6
10-3. Angle Assembly Parts 1/5 . . . . . . . . . . . . . . . . . . . . . . 10-7
10-4. Angle Assembly Parts 2/5 . . . . . . . . . . . . . . . . . . . . . . 10-8
10-5. Angle Assembly Parts (Opt. 001) 3/5 . . . . . . . . . . . . . . . . . 10-9
10-6. Angle Assembly Parts 4/5 . . . . . . . . . . . . . . . . . . . . . . 10-10
10-7. Angle Assembly Parts 5/5 . . . . . . . . . . . . . . . . . . . . . . 10-11
10-8. Front Assembly Parts 1/8 . . . . . . . . . . . . . . . . . . . . . . 10-12
10-9. Front Assembly Parts 2/8 . . . . . . . . . . . . . . . . . . . . . . 10-13
10-10. Front Assembly Parts 3/8 . . . . . . . . . . . . . . . . . . . . . . 10-14
10-11. Front Assembly Parts 4/8 . . . . . . . . . . . . . . . . . . . . . . 10-15
10-12. Front Assembly Parts 5/8 . . . . . . . . . . . . . . . . . . . . . . 10-16
10-13. Front Assembly Parts 6/8 . . . . . . . . . . . . . . . . . . . . . . 10-17
10-14. Front Assembly Parts 7/8 . . . . . . . . . . . . . . . . . . . . . . 10-18
10-15. Front Assembly Parts 8/8 . . . . . . . . . . . . . . . . . . . . . . 10-19
10-16. Rear Assembly Parts 1/8 . . . . . . . . . . . . . . . . . . . . . . 10-20
10-17. Rear Assembly Parts 2/8 . . . . . . . . . . . . . . . . . . . . . . 10-21
10-18. Rear Assembly Parts 3/8 . . . . . . . . . . . . . . . . . . . . . . 10-22
10-19. Rear Assembly Parts 4/8 . . . . . . . . . . . . . . . . . . . . . . 10-23
10-20. Rear Assembly Parts 5/8 . . . . . . . . . . . . . . . . . . . . . . 10-24
10-21. Rear Assembly Parts (Opt. 1D5) 6/8 . . . . . . . . . . . . . . . . . 10-25
10-22. Rear Assembly Parts 7/8 . . . . . . . . . . . . . . . . . . . . . . 10-26
10-23. Rear Assembly Parts 8/8 . . . . . . . . . . . . . . . . . . . . . . 10-27
10-24. Main Frame Assembly Parts 1/23 . . . . . . . . . . . . . . . . . . . 10-28
10-25. Main Frame Assembly Parts 2/23 . . . . . . . . . . . . . . . . . . . 10-29
10-26. Main Frame Assembly Parts (FDD Assembly) 3/23 . . . . . . . . . . . 10-30
Contents-11
10-27. Main Frame Assembly Parts (FDD Assembly) 4/23 . . . . . . . . . . . 10-31
10-28. Main Frame Assembly Parts 5/23 . . . . . . . . . . . . . . . . . . . 10-32
10-29. Main Frame Assembly Parts 6/23 . . . . . . . . . . . . . . . . . . . 10-33
10-30. Main Frame Assembly Parts (A20 Motherboard Assembly) 7/23 . . . . . 10-34
10-31. Main Frame Assembly Parts 8/23 . . . . . . . . . . . . . . . . . . . 10-35
10-32. Main Frame Assembly Parts 9/23 . . . . . . . . . . . . . . . . . . . 10-36
10-33. Main Frame Assembly Parts (A1 CPU Board Assembly) 10/23 . . . . . . 10-37
10-34. Main Frame Assembly Parts 11/23 . . . . . . . . . . . . . . . . . . 10-38
10-35. Main Frame Assembly Parts 12/23 . . . . . . . . . . . . . . . . . . 10-39
10-36. Main Frame Assembly Parts (A9 Input Multiplexer Assembly) 13/23 . . . 10-40
10-37. Main Frame Assembly Parts 14/23 . . . . . . . . . . . . . . . . . . 10-41
10-38. Main Frame Assembly Parts 15/23 . . . . . . . . . . . . . . . . . . 10-42
10-39. Main Frame Assembly Parts (Pre-regulator Assembly) 16/23 . . . . . . . 10-43
10-40. Main Frame Assembly Parts (A50 DC-DC Converter Assembly) 17/23 . . . 10-44
10-41. Main Frame Assembly Parts (A5 and A7 Assemblies) 18/23 . . . . . . . 10-45
10-42. Main Frame Assembly Parts (A2 DC Bias Assembly) 19/23 . . . . . . . 10-46
10-43. Main Frame Assembly Parts (YTO Assembly) 20/23 . . . . . . . . . . 10-47
10-44. Main Frame Assembly Parts (YTO Assembly) 21/23 . . . . . . . . . . 10-48
10-45. Main Frame Assembly Parts (YTO Assembly) 22/23 . . . . . . . . . . 10-49
10-46. Main Frame Assembly Parts 23/23 . . . . . . . . . . . . . . . . . . 10-50
A-1. Front Assembly Parts 3/7 . . . . . . . . . . . . . . . . . . . . . . A-3
A-2. Front Assembly Parts 4/7 . . . . . . . . . . . . . . . . . . . . . . A-4
A-3. Front Assembly Parts 5/7 . . . . . . . . . . . . . . . . . . . . . . A-5
A-4. Front Assembly Parts 6/7 . . . . . . . . . . . . . . . . . . . . . . A-6
A-5. Main Frame Assembly Parts (FDD Assembly) 3/23 . . . . . . . . . . . A-7
A-6. Front Assembly Parts 5/8 . . . . . . . . . . . . . . . . . . . . . . A-8
A-7. Rear Assembly Parts 7/8 . . . . . . . . . . . . . . . . . . . . . . A-9
A-8. Front Assembly Parts 3/8 . . . . . . . . . . . . . . . . . . . . . . A-11
A-9. Front Assembly Parts 4/8 . . . . . . . . . . . . . . . . . . . . . . A-12
A-10. Top View (Major Assemblies) . . . . . . . . . . . . . . . . . . . . A-13
A-11. Main Frame Assembly Parts (A5 and A7 Assemblies) 18/23 . . . . . . . A-15
A-1