Agilent Technologies 4352B User manual

Errata
Title & Document Type: 4352B VOC/PLL Signal Analyzer Service Manual
Manual Part Number: 04352-90141
Revision Date: June 2000
HP References in this Manual
This manual may contain references to HP or Hewlett-Packard. Please note that
Hewlett-Packard's former test and measurement, semiconductor products and chemical
analysis businesses are now part of Agilent Technologies. We have made no changes to
this manual copy. The HP XXXX referred to in this document is now the Agilent XXXX.
For example, model number HP8648A is now model number Agilent 8648A.
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Agilent 4352B V
CO/PLL Signal Analyzer
Service Manual
SERIAL NUMBERS
This manual applies directly to instruments with
serial number prex JP1KE00196 or above
.
F
or additional important information about serial numbers,
read \Serial Number" in Appendix Aofthis Manual.
Agilent Part No. 04352-90141
Printed in JAPAN June 2000
Second 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 T
echnologies .
Agilent T
echnologies Japan, Ltd.
Component T
est PGU-Kobe
1-3-2, Murotani, Nishi-ku, Kobe-shi,
Hyogo
,651-2241 Japan
MS-DOS
R

is aU
.S. registered trademark of Microsoft Corporation.
c
 Copyright Agilent Technologies Japan, LTD. 1997, 2000

Printing History
December 1997
:::::::::::::::
::
::
::
::::::::::::::: ::
First Edition (part number: 04352-90141)
June 2000
:::::::
::
::
:::: :: :: :::::::::::::
::
::
::
::
: Second Edition (part number: 04352-90141)
iii

Safety Summary
The following general safety precautions must be observed during all phases of operation,
service
,and repair of this instrument. F
ailure to comply with these precautions or with specic
W
ARNINGS
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 A
gilent T
echnologies assumes no liability for the customer's failure to comply with these
requirements
.
Note
The 4352B complies with INST
ALLA
TION CA
TEGORY II and POLLUTION
DEGREE 2in IEC1010-1. The 4352B is an INDOOR USE product.
Ground The Instrument
T
oavoid electric shock hazard, the instrument chassis and cabinet must be connected to a
safety earth ground using 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 asafety hazard.
Keep A
way 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. T
oavoid injuries
,always disconnect power and discharge
circuits before touching them.
DO NOT Service Or A
djust Alone
Do not attempt internal service or adjustment unless another person, capable of rendering rst
aid and resuscitation, is present.
DO NOT Substitute P
arts 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 Oce for service and repair to ensure the safety features are
maintained.
Dangerous Procedure W
arnings
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.
iv

Typeface Conventions
Bold
Boldface type is used when aterm is dened. F
or 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 aname 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.
4
HARDKEYS
5
Labeled keys on the instrument front panel are enclosed in
45
.
NNNNNNNNNNNNNNNNNNNNNNNNNN
SOFTKEYS
Softkeys located to the right of the CRT are enclosed in
NNNNN
.
v

Certication
Agilent T
echnologies certies that this product met its published specications at the time
of shipment from the factory. Agilent T
echnologies further certies that its calibration
measurements are traceable to the United States National Institute of Standards and
T
echnology
,to the extent allowed by the Institution's calibration facility
,orto the calibration
facilities of other International Standards Organization members.
W
arranty
This Agilent T
echnologies instrument product is warranted against defects in material and
workmanship for aperiod of one year from the date of shipment, except that in the case of
certain components listed in
Instrument Specications
of this manual, the warranty shall be
for the specied period. During the warranty period, Agilent T
echnologies will, at its option,
either repair or replace products that prove to be defective
.
F
or warranty service or repair
,this product must be returned to aservice facility designated by
Agilent Technologies
.Buyer
shall prepay shipping charges to Agilent T
echnologies and Agilent
T
echnologies 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 T
echnologies from
another country
.
Agilent T
echnologies warrants that its software and rmware designated by Agilent
T
echnologies for use with an instrument will execute its programming instruction when
properly installed on that instrument. Agilent T
echnologies does not warrant that the operation
of the instrument, or software
,or rmware will be uninterrupted or error free.
Limitation Of W
arranty
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 of the environmental specications for the product, or improper site
preparation or maintenance
.
No other warranty is expressed or implied. A
gilent T
echnologies 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
.A
gilent T
echnologies
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 T
echnologies products
.
F
or any assistance
,contact your nearest Agilent Technologies Sales and Service Oce
.
A
ddresses are provided at the back of this manual.
vii

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).
This
W
arning
sign denotes ahazard. 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 ahazard. 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 sign denotes important information. It calls attention to a
procedure
, practice
, condition or the like
,which is essential to highlight.
viii

Document Guide
Please utilize the following manuals when using the analyzer:
Function Reference
Explains the operations commonly used for measurement and illustrates all functions
accessed from the front panel keys and softkeys
.It
also provides information on options
and accessories available, specications, system performance
,andconceptual
information about the analyzer's features.
GPIB Programming Manual
Explains the basic programming methods used when remotely controlling the analyzer
with GPIB
.Also
,contains information on the usage of all GPIB commands
,the status
report mechanism, and the data transmission format.
Manual Supplement for HP Instrument B
ASIC User's Handbook
Describes how HP Instrument B
ASIC works with the analyzer.
HP Instrument B
ASIC User's Handbook
Explains the usage of HP Instrument B
ASIC including general programming examples
and hints
.Also
,explains all HP Instrument B
ASIC commands
. This manual consists of
the following three parts: \HP Instrument BASIC Programming T
echnique
," \HP
Instrument B
ASIC Interface Technique
," and \HP Instrument B
ASIC Language
Reference
."
Service Manual
Explains how to do performance tests
,and to adjust, troubleshoot, and repair the
instrument.
ix

Contents
1. General Information
INTRODUCTION ..................
..
..
..
.......1-1
ORGANIZA
TION OF SERVICE MANU
AL .............
..
..
..
.1-1
ANAL
YZERS CO
VERED BY THIS MANU
AL ............. .. .. .1-3
T
ABLE OF SERVICE TEST EQUIPMENT ...............
..
..
.1-4
2. P
erformance T
ests
INTRODUCTION ................
..
..
...........2-1
GENERAL INFORMA
TION ................
..
........2-1
W
arm Up Time ....................
..........2-1
Ambient Conditions ..
.....................
..
..
.2-1
Calibration Cycle ...............
..
..
..........2-1
P
erformance T
est Record .............. .. .. ........2-1
Recommended T
est Equipment ................. ......2-2
FREQUENCY MEASUREMENT TEST .................. ...2-3
Description ..................
..
............2-3
Specication ................................2-3
T
est Equipment ..............................2-3
Procedure .................................2-3
RF POWER MEASUREMENT A
CCURA
CY TEST ................2-5
Description ..............
..................2-5
Specication ................ ................2-5
T
est Equipment ...... .......................
. 2-5
Procedure ........ ....................... .. 2-5
C/N RA
TIO MEASUREMENT PHASE NOISE TEST .... ...........2-11
Description ......
..
..
...................... 2-11
Specication ........ .. ..................... . 2-11
T
est Equipment .....................
..
..
..
...2-11
Procedure .... ................... .. .. .. ....2-11
C/N MEASUREMENT FLA
TNESS A
CCURACY TEST . ............. 2-13
Description ........
............
............ 2-13
Specication.... .. .. .. .. .................... 2-13
Test Equipment .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 2-13
Procedure . . . . . . . . . . . . . . . . . . . . . . . .... .. .. .. 2-13
C/N RA
TIO MEASUREMENT LINEARITY A
CCURACYTEST.. .. .. .. .. . 2-16
Description ............................. .. . 2-16
Specication .... .. .. .. .. .. .. .. . .. .. .. .. .. .. . 2-16
Test Equipment .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 2-16
Procedure . . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. .. 2-16
FM DEVIATION TEST ............................ 2-19
Description ................................ 2-19
Specication.... .. .. .. .. .. .. .. . .. .. .. .. .. .. . 2-19
Test Equipment .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 2-19
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
SPECTRUM MEASUREMENT RELATIVE LEVEL ACCURACY TEST . . . . . . . 2-25
Description ................................ 2-25
Contents-1

Specication ..
..
................. .. .. .. .. ...2-25
T
est Equipment ............. .. .. .. .. .. .. .....2-25
Procedure ..
............... .. .. .. .. .. ......2-25
FREQUENCY TRANSIENT FREQUENCY A
CCURA
CY TEST .........
.. 2-28
Description ..
.............
..
..
..
..
..
..
.....2-28
Specication ..
............... .. .. .. .. .. .....2-28
T
est Equipment ............... .. .. ...........2-28
Procedure ................. .. .. ............2-28
DC POWER V
OL
T
A
GE A
CCURA
CY TEST .....
..
..
..
.........2-30
Description ...............
..
..
..
...........2-30
Specication ................. .. .. ...........2-30
T
est Equipment .........
...... ...............2-30
Procedure ............. .. .. ................2-30
DC CONTROL V
OL
T
A
GE A
CCURA
CY TEST ..... .. ...........2-32
Description .............
..
..
...............2-32
Specication ............... .. ...............2-32
T
est Equipment ............... ...............2-32
Procedure ............. ....................2-32
MOD OUT LEVEL A
CCURA
CY TEST .....................2-34
Description .................
...............2-34
Specication ..........
..
..
..................2-34
T
est Equipment .......... ..
..
................2-34
Procedure ....
..
......................... ..2-34
DC POWER CURRENT MEASUREMENT A
CCURACY TEST ...........2-36
Description ....
..
.......................
..
.2-36
Specication ......
..........................2-36
T
est Equipment ............................. .2-36
Procedure ........................
.........2-36
PERFORMANCE TEST RECORD ....................... 2-38
Frequency Measurement T
est ......................
..2-38
P
ower Measurement A
ccuracy T
est ..................... 2-38
C/N Phase Noise T
est ....................... .....2-38
C/N Measurement A
ccuracy T
est (Flatness) .................2-39
C/N Measurement A
ccuracy T
est (Linearity) .........
..
..
..
..2-39
FM Deviation T
est ..............
..
..
...........2-39
Spectrum Measurement Relative Level A
ccuracy T
est ............ 2-40
Frequency Transient Frequency A
ccuracy T
est ...........
..
..
. 2-40
DC POWER V
oltage T
est ............
..
..
..
........2-40
DC CONTROL V
oltage T
est ..
..
..
..
..
..
.............2-41
MOD OUT V
oltage T
est . .............
............
.2-41
DC POWER Current T
est . . . . . ..................... 2-41
3. Adjustments and Correction Constants
Introduction . . . . . . . . . . . . . . . . . . . . . ............ 3-1
Safety Considerations ... . .. .. .. .. .. .. .. .. .. .. .. .. 3-1
RequiredEquipment.. .. .. .. .. .. .. .. .. .. ......... 3-2
Adjustment Program . . . . . . . . . . . . . . . . . . . . . ....... 3-2
Warm-up for A
djustments and Correction Constants .. .. .. .. .. .. .. 3-3
Instrument Cover Removal . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Order Of Adjustments and Correction Constants . . . . . . . . . . . . . . . . 3-3
Preparation for Using the Adjustment Program .... .. .. .. .. .. .. 3-4
REFERENCE FREQUENCY ADJUSTMENT .................. 3-8
Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Procedure... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 3-8
THIRD MIXER FEEDTHROUGH ADJUSTMENT ................ 3-10
Contents-2

Required Equipment . .................
..
..
..
..
.. 3-10
Procedure ............... .. .. .. .. .. .. ......3-10
THIRD IF AMP GAIN ADJUSTMENT ............. .. .. .. .. 3-11
Required Equipment . .............
..
..
..
..
..
..
..3-11
Procedure ............... .. .. .. .. .. .. ......3-11
EEPROM WRITE-ID AND INITIAL CORRECTION CONST
ANTS ......... 3-13
Required Equipment ..............
..
..
..
........3-13
Procedure ................. .. .. ............3-13
CRYST
AL FIL
TER FREQUENCY RESPONSE CORRECTION CONST
ANTS .....3-14
Required Equipment ..............
..
..
..
........3-14
Procedure ................. .. .. ............3-14
FV CONVERTER CORRECTION CONST
ANTS .......
..
..
..
....3-15
Required Equipment ..........
..
..
..
............3-15
Procedure ............... .. ................3-15
DC POWER V
OL
T
A
GE CORRECTION CONST
ANTS ...... .. .......3-16
T
est Equipment ...........
..
..
...............3-16
Procedure ............... .. ................3-16
DC CONTROL V
OL
T
A
GE CORRECTION CONST
ANTS .... ..........3-17
Required Equipment ............................3-17
Procedure .................................3-17
MOD OUT LEVEL CORRECTION CONST
ANTS ....... .. ........3-18
Required Equipment ........... .. .. .............3-18
Procedure ...... ....................... .. ..3-18
DC POWER CURRENT CORRECTION CONST
ANTS . ..............3-19
T
est Equipment .... .......................
..
.3-19
Procedure ............................... ..3-19
RF POWER LINEARITY CORRECTION CONST
ANTS . .............3-20
Required Equipment ............................3-20
Procedure .................................3-20
RF POWER FLA
TNESS CORRECTION CONST
ANTS ...............3-22
Required Equipment . .......................
..
..3-22
Procedure ......................... .. ......3-22
SPECTRUM MEASUREMENT CORRECTION CONST
ANTS ............3-23
Required Equipment ..............
..
..
..
........3-23
Procedure ................... .. ............3-23
4. Overall Troubleshooting
INTRODUCTION ................... .. .. ........4-1
TROUBLESHOOTING SUMMARY ........ .. .. .. .. .......4-1
ST
ART HERE ....
......................... ...4-3
INSPECT THE POWER ON SEQUENCE ......... .. .. .. .. .. . 4-4
Check the F
an........... .. .. .. . .. .. .. .. .. .. . 4-4
Check the Front P
anel LED ......
.................. 4-4
Check Error Message . . . . . . . . . . . . . . . . . . . .. .. .. .. . 4-4
OPERATOR'S CHECK ....................... .. . .. 4-5
Test Equipment .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 4-5
Procedure to check the source group ..................
.. 4-5
Procedures to check the receiver group . . . . . . . . . . . . . . . . . . . 4-6
PERFORMANCE TESTS FAILURE TROUBLESHOOTING ............ 4-9
Perform Adjustments and Correction Constants ...... .. .. .. .. . 4-9
TROUBLESHOOTING GPIB SYSTEM ..................... 4-10
Check the GPIB system with the signal generator .... .. .. .. .. .. 4-10
Check the External Controller .... .. .. .. .. .. .. .. .. . .. 4-11
Contents-3

5. Power Supply Troubleshooting
INTRODUCTION ..
...............
..
..
..
..
..
....5-1
ST
ART HERE .............
..
..
..
..
..
..
.......5-2
1. Check Error Messages .............. ..
..
..
..
..
..5-2
2. Check the F
an is Rotating ........... .. .. .. .. .. ...5-2
3. Check the A50 SHUTDOWN LED ............ .. .. .. .. . 5-2
A50 Shutdown LED ............... .. .. ........5-3
4. Check the A1 +5 VD LED ........... .. .. .........5-4
Measure the A1 +5 VD V
oltage ........... .. .. .......5-4
5. Check the A2 Seven LEDs ............ .. .. ........5-4
6. Run the Internal T
est 4: A2 POST REGULA
TOR ....... .. .. ...5-5
Internal T
est 4: A2 POST REGULA
TOR ....
..
..
..
........5-6
FIND OUT WHY THE F
AN IS NOT ROT
A
TING . ..
..
..
..........5-7
1. Check the Line V
oltage
,Selector Switch Setting, and Fuse .... .. ...5-7
2. Check the A50 SHUTDOWN LED .......... .. .........5-7
FIND OUT WHY THE A50 SHUTDOWN LED IS OFF ....... .. .....5-8
1. Disconnect the Cable from the A50J3 .......
..
..
.......5-8
2. Disconnect the Cable from the A1J10 .....
..
...........5-8
3. Remove Assemblies ...........................5-8
FIND OUT WHY THE A1 +5 VD LED IS NOT ON STEADIL
Y.....
.....5-9
1. Check the A40 Pre-Regulator ........ .. ............5-9
2. Check the A50 DC-DC Converter ....... .. .. ..........5-9
3. Disconnect Cables on the A1 CPU ....................5-10
4. Remove Assemblies .... ....................... 5-10
TROUBLESHOOT THE F
AN AND THE A50 DC-DC CONVERTER ........5-12
1. Troubleshoot the F
an ..
........................ 5-12
2. Troubleshoot the A50 DC-DC Converter . ................5-13
TROUBLESHOOT A2 POST-REGULA
TOR ...................5-15
1. Measure A2 P
ost Regulator Output V
oltages ................ 5-15
6. Digital Control Troubleshooting
INTRODUCTION ..
.......................
..
....6-1
A1 CPU Replacement ................. ...........6-3
FIRMW
ARE INST
ALLA
TION ...........
..
..
..
........6-4
Ordering the Firmware Diskette ..............
..
..
....6-4
ST
ART HERE ...............
..
..
.............6-5
1. Check the P
ower On Sequence ............. .. .. .....6-5
Check the A1 Eight LEDs .............
..
..
..
.....6-5
Check Error Messages .....
..
..
..
..
..
...........6-6
2. Check the A1 CPU ..
......................... 6-6
3. Check the A1 DRAM and Flash Memory ..
............... 6-7
4. Check the A1 V
olatile Memory . . . . .................. 6-8
5. Check the A30 Front Keyboard .... .. .. .. .. .. .. .. .. . 6-8
6.ChecktheA53FDD.................
.......... 6-8
7. Check the A32 I-B
ASIC Interface and the mini-DIN Keyboard .. .. . .. 6-9
8. Check the A17 24 bit I/O P
ort ..............
........ 6-9
TROUBLESHOOT THE A51 GSP and A52 LCD . . . . . . . . . . . . . . . . . 6-10
1. Run the Internal T
est 3: A51 GSP ................
.... 6-10
2. Check the A52 LCD(Liquid Crystal Display) . . . . . . . . . . . . . . . . 6-10
Contents-4

7. Source Group Troubleshooting
INTRODUCTION ..
............... .. .. .. .. .. ....7-1
SOURCE GROUP TROUBLESHOOTING SUMMARY ............ .. . 7-2
ST
ART HERE ............. .. .. .. .. .. .. .......7-4
1. Check A6's A/D Converter ........... .. .. .. .. ..
..
.7-4
2. Check Option 001 DC CONTROL Outputs ......... .. .. .. .. 7-4
3. Bypass A70 .............
..
..
..
............7-5
4. Check DC POWER/DC CONTROL Outputs ............
..
..
.7-5
5. Check A3/A13 Source ............
..
..
..
........7-7
6. Check MOD OUT signal ...........
..
..
..
........7-8
7. Check REF OSC on A6 ............ .. .. .........7-8
8. Receiver Group Troubleshooting
INTRODUCTION ............... .. ..............8-1
RECEIVER GROUP TROUBLESHOOTING SUMMARY ..........
..
.. 8-2
ST
ART HERE ............. .. .................8-4
1. Check the Rear P
anel Output signals (40MHz Output/INT REF OUTPUT) ..8-4
2. Check A6 Spectrum Analyzer ......... .............8-4
3. Check A5 2nd PLL ...........................8-7
4. Check Measurement Functions ......................8-9
5. Check A11 Thermometer ......... .. .............8-10
6. Check the outputs from A10 1st Mixer ..... .. .. .........8-10
7. Check the Residual FM ..
....................... 8-12
8. Check the Frequency Transient measurement . ..............8-13
9. Service K
ey Menus
INTRODUCTION ......
......................... 9-1
SERVICE MENU .......................
........9-3
NNNNNNNNNNNNNNNNN
TESTS
..................................9-3
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SERVICE INSTRUMENT
...........................9-3
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SERVICE MODES
(
:DIAG:SERV:MODE {OFF|ON|0|1}
)........
..
...9-3
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
FIRMWARE REVISION
(
:DIAG:FREV?
)..... ...............9-4
TESTS MENU . ...................
..
..
..
......9-5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
EXECUTE TEST
(
:DIAG:TEST:EXEC
)..................... 9-5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
INTERNAL TESTS
(
:DIAG:TEST 0
)..............
..
.....9-6
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
EXTERNAL TESTS
(
:DIAG:TEST 11
)........ .. .. .........9-6
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
DISPLAY TESTS
( :DIAG:TEST 21
).... .. .. .. ...........9-6
T
est Status ............
....................9-6
Diagnostic T
ests ........... .. .. .. .. .. .. .. .. .. . 9-7
Test Descriptions . . . . . . . .. .. .. .. . .. .. .. .. .. .. .. 9-8
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
INTERNAL TESTS ......................... .. . 9-8
0: ALL INT ............................
... 9-8
1: A1 CPU ....
.........................
.. 9-8
2: A1 V
OLATILE MEMORY . .. .. .. .. .. .. .. .. .. .. .. . 9-8
3: A51 GSP ..............
................. 9-9
4: A2 POST REGULA
TOR ................. .. .. .. . 9-9
5through10:N/A............................ 9-9
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
EXTERNAL TESTS ............................ 9-9
11: FRONT PANEL DIAG. ........................ 9-9
12: DSK DR FAULTISOL'N........................ 9-9
13: 24 BIT I/O PORT . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-9
14 through 20: N/A . . .. .. .. .. .. .. .. .. .. .. .. .. . 9-10
Contents-5

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
DISPLAY TESTS
.......... .. .. .. .. .. .........9-10
21: TEST P
ATTERN 1............
..
..
..
..
..
..
..9-10
22: TEST P
ATTERN 2............
..
..
..
..
..
..
..9-10
23: TEST P
ATTERN 3............
..
..
..
..
..
..
..9-10
24: TEST P
A
TTERN 4........
..
..
..
..
..
..
......9-10
25: TEST P
A
TTERN 5........
..
..
..
..
..
..
......9-10
SERVICE MODES MENU ...............
..
..
..
......9-11
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
BUS MEAS [ON]
................. .. .. .........9-11
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
MISC MENU
............... .. .. .............9-11
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
CORRECTION CONSTANTS
..........
..
..
..
..........9-11
NNNNNNNNNNNNNNNNN
A2/A8
........
..
..
..
....................9-12
NNNNNNNN
A3
......... .. .....................
..
.. 9-12
NNNNNNNN
A5
....
..
..
....................... .. ...9-12
NNNNNNNN
A6 ..... .....................
..
..
......9-12
NNNNNNNNNNN
A70
.........................
..
........9-12
Service Modes ...............................9-12
BUS MEASUREMENT MENU ............
.............9-13
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
BUS MEAS ON off
(
:DIAG:SERV:BUS:STAT {ON|OFF|1|0}
) . ........9-13
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
DC BUS [FAN PWR]
(
:DIAG:SERV:BUS:DC
<
numeric
>
)...........9-13
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
FREQ BUS [OFF]
(
:DIAG:SERV:BUS:FREQ
<
numeric
>
)........... 9-14
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
WAIT COUNT
(
:DIAG:SERV:BUS:WAIT
<
numeric
>
)..............9-14
Bus Measurement .....
........................ 9-14
Bus Measurement Procedure ........................9-14
Bus Measurement V
alues ....
......................9-15
DC Bus Node Descriptions ......................
...9-15
0: NONE ........................
........9-15
1: [A2] +5 V(A
UX) (2.025 U) ..................
..
..9-15
2: [A2]
0
15 V(
0
1.92 U) .................
..
......9-15
3: [A2]
0
12.6 V(
0
2.124 U) .................
..
.....9-15
4: [A2]
0
5V(
0
2.025 U) .......
..
..
..
............9-15
5: [A2] +5 V(2.025 U) ............
..............9-15
6: [A2] +5.3 V(2.1465 U) .............. .. ........9-15
7: [A2] +8.5 V(1.8955 U) .............. .. .. ......9-15
8: [A2] +15 V(A
UX) (1.92 U) ..........
..
..
..
......9-16
9: [A2] +15 V(1.92 U) ..........
..
...... .. .. ....9-16
10: [A2] +22 V(2.002 U) . ............. ...........9-16
11: [A2] F
AN POWER .. .. ...................... 9-16
12: [A2] +65 V (2.0605 U) ......... .. .. .. .. .. .. .. . 9-16
13 through 19: Not Assigned . . . . . . . .. .. .. .. .. .. .. .. 9-16
20: [A3] +20VB . . . . . . . . . . .. .. .. .. .. .. .. .. .. . 9-16
21: [A3] 0 5VB ...................... .. .. .. . 9-16
22: [A3] +25V
C ... .. .. .. .. .. .. .. .. .. .. .. . .. . 9-16
23: [A3] -5V
C.... .. .. .. .. .. .. .. . ........... 9-16
24: [A3] DC POWER . . . . . . . . . . . . . . . . . . . . . ...... 9-16
25: [A3] DC CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . 9-17
26 through 29: Not Assigned . . . . . . . . . . . . . . . . . . . . . . . 9-17
30: [A5] VCO VTUNE .......................... 9-17
31: [A5] 2ND IF DC OFFSET . . . . . . . . . . . . . . . . . . . . . . . 9-17
32 through 39: Not Assigned . . . . . . . . . . . . . . . . . . . . . . . 9-17
40: [A6] AD VREF . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-17
41: [A6] REF LOOP VTUNE ....................... 9-17
Contents-6

42: [A6] FIXED PLL VTUNE ...............
..
..
..
.. 9-17
43: [A6] FN LOOP VTUNE ............... .. .. .. .. .9-17
44: [A6] PEAK DETECTOR ............
..
..
..
..
..
.. 9-17
45: [A6] GND ............... .. .. .. .. .. .....9-17
46 through 49: Not Assigned ...........
..
...... .. .. 9-17
50: [A6] SA P
A
TH ..........
..
..
..
..
..
..
......9-18
51: [A6] MONITOR P
A
TH ..........
..
..
..
.........9-18
Frequency Bus Node Descriptions .............. .. .. ....9-18
0: OFF ..............
..
..
..
.............9-18
1: [A5] 2nd LOCAL ............
..
.............9-18
2: [A5] FREQ COUNTER .............. .. .. .......9-18
3: [A5] FV CONVERTER .......... .. .. ...........9-18
4through 9: Not Assigned .........
..
..
...........9-18
10: [A6] SAMPLE HOLD ..........
..
..
...........9-18
11: [A6] FM FREQ ............ .. ..............9-18
12: [A6] REF LOOP ..........
..
..
.............9-18
13: [A6] FIXED PLL ............
..
.............9-18
14: [A6] FN LOOP ........
..
..................9-18
CORRECTION CONST
ANTS MENU .............
.........9-19
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
XTAL FILT ON off
..............
..............9-19
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
FV ON off
.... .. .. ................... .. .. . 9-19
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
DCPOW VOLT CC ON off
..................... .. .. .9-20
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
DCPOW CURR CC ON off
................. .........9-20
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
DCCTL VOLT ON off
...........................9-20
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
MOD OUT ON off
......
.......................9-20
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
POW LIN ON off
.............................9-20
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
POW TEMP ON off
............................9-20
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
POW FRESP ON off
................. ...........9-20
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NOISE ATTN ON off
.........
..
................9-20
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SPEC WIDE ON off
...
..
.....................
.. 9-20
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SPEC NARR ON off
......................
..
..
..9-21
A2/A8 CONTROL MENU ..............
..
..
.........9-22
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
RF ATTEN:
................. .. .. ...........9-22
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
POW FAIL LOCATION
.......... .. .. .............9-22
A3/A13 CONTROL MENU . ..
..
..
..
............... .. 9-23
NNNNNNNNNNNNNNNNNNNNNNNNNN
DAC MENU
....................... .........9-23
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
RANGE MENU
......
......................... 9-24
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
OUTPUT SELECT .... .. .. . .. .. .. .. .. ........... 9-24
NNNNNNNNNNNNNNNNNNNN
STATUS .... .. .. .. ........................ 9-24
A5CONTROLMENU... .. .. .. .. .. .. .............. 9-25
NNNNNNNNNNNNNNNNNNNNNNN
2nd PLL
...................... .. .. .. .. .. . 9-25
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
FREQ COUNTER
.... .. ........................ 9-26
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
FV CONVERTER .............................. 9-26
NNNNNNNN
IF .................................... 9-26
NNNNNNNNNNNNNNNNNNNN
STATUS .................................. 9-26
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
INTERNAL STATUS ............................ 9-26
A6CONTROLMENU... .. .. .. .. .. .. .. .. .. .. .. . .. . 9-27
Contents-7

NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
ATTEN/AMP
........... .. .. .. .. .. ...........9-27
NNNNNNNNNNNNNNNNNNNNNNN
IF GAIN
.....
..
..
..
..
..
..
............... .9-28
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
INPUT SELECT
..
..
..
..
..
..
..
............... .9-28
NNNNNNNNNNN
PLL
.... .. .. .. .. .............
..
..
..
..
.. 9-28
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
FV CALOUT on OFF
..
..
..
............... .. .. .. .9-28
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
FM OUT on OFF
....................
..
..
..
....9-28
NNNNNNNNNNNNNNNNNNNN
STATUS
................
..
..
..
............9-28
BOOTLO
ADER MENU . ..
..
..
..................... 9-29
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SYSTEM UPDATE
..
..
..
..
..................... .9-29
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SYSTEM BACKUP
..... ...................
..
..
.. 9-29
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
PREVIEW DISK
..
....................... .. ...9-30
NNNNNNNNNNNNNNNNNNNN
REBOOT
....................... .. .........9-30
10. Theory of Operation
O
VERALL OPERA
TION AND FUNCTIONAL GROUPS . .............10-1
POWER SUPPL
YOPERA
TION ....
.....................10-2
Line P
ower Module ..............
..
..
..........10-4
A40 Preregulator ................
..
...........10-4
A50 DC-DC Converter ................. .. .. ......10-4
Switching Regulator 1........... ...............10-4
Switching Regulator 2........... ...............10-4
Regulated +5V Digital Supply (+5 VD) ..................10-4
A50 Shutdown LED ...........................10-4
A2 P
ost-Regulator .............................10-5
Shutdown Circuit .....
.......................10-5
Seven Status LEDs ............................10-5
A8 RF Attenuator Drive Circuit ...
...................10-6
DIGIT
AL CONTROL OPERA
TION ..... ..................10-7
A1 CPU ........ ....................... .. .10-9
A17 24 Bit I/O P
ort .................
..
..
..
.....10-9
A30 Front-P
anel Keyboard ..................... .. .. 10-9
A31 I/O Connector . ....................... .. ...10-9
A32 I-B
ASIC Interface .....................
......10-10
A51 GSP ..
..
...................
..
..
..
....10-10
A54 Inverter .... ..................... .. .. ..10-10
A52 LCD (Liquid Crystal Display) ..........
..
..
..
..
..
.. 10-10
A53 FDD .............
............
........10-10
SOURCE THEORY .. .. .. .. .. .. . .. .. .. .. .. .. .. .. . 10-11
RECEIVER THEORY.. .. .. .. .. .. .. .. .. .. .. .. .. .. . 10-12
A5 Second PLL .. .. .. .. .. .. .. .. .. .. .. ........ 10-13
A6 Spectrum Analyzer . . . . . . . .... .. . .. ........... 10-13
A7 P
ower Divider .. .. .. .. .. .. .. .. .. .. .. . .. .. .. 10-13
A8 RF Attenuator ..........
................... 10-13
A9 P
eak Detector ............................. 10-13
A10 First Mixer .... .. .. .. .................... 10-13
A11 Thermometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-14
ApartofA3/A13,A60........................... 10-14
Contents-8

11. Replaceable P
arts
Introduction ..
............... .. .. .. .. .. ......11-1
Ordering Information . ............. .. .. .. .. .. .. ..11-1
Direct Mail Order System .............. .. .. .. .. .. ..11-1
Replaceable Parts List .............. .. .. .. .. .. ....11-2
12. P
ost Repair Procedures
INTRODUCTION ................. .. .. ..........12-1
POST REP
AIR PROCEDURES ............
..
...........12-1
A. Manual Changes
Introduction ............. .. .. ................A
-1
Manual Changes ............ .. .. ...............A
-1
Change 1.............. .. ..................A
-2
Serial Number ............
....................A
-5
B
.P
ower Requirement
Replacing Fuse ......................
.......B-1
Fuse Selection ...............................B-1
P
ower Requirements .................. .. .........B-2
P
ower Cable .................. .. .. ..........B-2
Messages
Error Messages in Alphabetical Order ................
..
...
Messages-2
Error Messages in Numerical Order ......................
Messages-15
Index
Contents-9