HP 8560A User manual

Service Manual
HP 8560A Spectrum Analyzer
SERIAL NUMBERS
Prefix 3207A and Above
Eiia
HEWLETT
PACKARD
HP Part No. 08560-90081
Printed in USA August 1992

@Copyright Hewlett-Packard Company 1990, 1992
All Rights Reserved. Reproduction, adaptation, or translation without prior written
permission is prohibited, except as allowed under the copyright laws.
1212 Valley House Drive, Rohnert Park, CA 94928-4999, USA

Certification
Hewlett-Packard Company certifies that this product met its published specifications at the
time of shipment from the factory. Hewlett-Packard further certifies that its calibration
measurements are traceable to the United States National Institute of Standards and
Technology, to the extent allowed by the Institute’s calibration facility, and to the calibration
facilities of other International Standards Organization members.
Warranty
This Hewlett-Packard instrument product is warranted against defects in material and
workmanship for a period of one year from date of shipment. During the warranty period,
Hewlett-Packard Company will, at its option, either repair or replace products which prove to
be defective.
For warranty service or repair, this product must be returned to a service facility designated
by HP. Buyer shall prepay shipping charges to HP and HP shall pay shipping charges to
return the product to Buyer. However, Buyer shall pay all shipping charges, duties, and taxes
for products returned to HP from another country.
HP warrants that its software and firmware designated by HP for use with an instrument
will execute its programming instructions when properly installed on that instrument. HP
does not warrant that the operation of the instrument, or software, or firmware 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 modification or
misuse, operation outside of the environmental specifications for the product, or improper
site preparation or maintenance.
NO OTHER WARRANTY IS EXPRESSED OR IMPLIED. HP SPECIFICALLY
DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE.
Exclusive Remedies
THE REMEDIES PROVIDED HEREIN ARE BUYER’S SOLE AND EXCLUSIVE
REMEDIES. HP 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
Hewlett-Packard products.
For any assistance, contact your nearest Hewlett-Packard Sales and Service Ofice.
. . .
III

Safety Symbols
The following safety symbols are used throughout this manual. Familiarize yourself with each
of the symbols and its meaning before operating this instrument.
Caution
The caution sign denotes a hazard. It calls attention to a procedure which,
if not correctly performed or adhered to, could result in damage to or
destruction of the instrument. Do not proceed beyond a caution sign until the
indicated conditions are fully understood and met.
Warning
The warning sign denotes a hazard. It calls attention to a procedure which,
if not correctly performed or adhered to, could result in injury or loss of life.
Do not proceed beyond a warning sign until the indicated conditions are fully
understood and met.
General Safety Considerations
Warning
Before this instrument is switched on, make sure it has been properly grounded
through the protective conductor of the ac power cable to a socket outlet
provided with protective earth contact.
Any interruption of the protective (grounding) conductor, inside or outside
the instrument, or disconnection of the protective earth terminal can result in
personal injury.
Warning
There are many points in the instrument which can, if contacted, cause personal.
injury. Be extremely careful.
Any adjustments or service procedures that require operation of the instrument
with protective covers removed should be performed only by trained service
personnel.
Caution
Before this instrument is switched on, make sure its primary power circuitry
has been adapted to the voltage of the ac power source.
Failure to set the ac power input to the correct voltage could cause damage to
the instrument when the ac power cable is plugged in.
iv

HP 8560A Spectrum Analyzer Documentation Outline
For ordering information, contact a Hewlett-Packard Sales and Service Office.
Manuals Shipped with Your Instrument
HP 8560A Installation and Verification Manual
n Tells you how to install the spectrum analyzer.
n Tells you what your analyzer’s specifications are.
HP 856OA/8561 B/8563A
0
perating
and Programming Manual
w Tells you how to make measurements with your spectrum analyzer.
w Tells you how to program your spectrum analyzer.
HP 8560A Quick Reference Guide
8 Is an abbreviated version of the HP 856OA/8561B/8563A Operating and Programming
iWanua1
n Provides you with a listing of all remote programming commands.
Options
Option 915: HP 8560A
S
ervice Manual and HP 8560A/6lB/63A Spectrum Analyzer
Component Level Information
w The service manual provides information to service your analyzer to the assembly-level (not
always immediately available for new products).
n The component-level information binder provides component-level information for
component-level repair of the analyzer or analyzer family (not always immediately available
for new products).
Option 910: Extra Manual Set
w Doubles all documentation shipped with a standard instrument.
Option 916: HP 8560A Quick Reference Guide
1 Adds an extra HP 8560A Quick Reference Guide to the document package.
V

Contents
1. General Information
Manual Organization .........................
Manual Text Conventions .......................
Serial Numbers Covered by This Manual .................
Instrument Variations .........................
HP 85629B Test and Adjustment Module ................
Service Kit ..............................
Recommended Test Equipment .....................
Electrostatic Discharge ........................
Reducing Potential for ESD Damage .................
Static-Safe Accessories ........................
Returning Instruments for Service ....................
Service Tag ............................
Original Packaging .........................
Other Packaging ..........................
Sales and Service Offices ........................
2. Adjustment Procedures
Introduction .............................
Safety Considerations ........................
Which Adjustments Should Be Performed? ...............
Test Equipment ...........................
Adjustable and Factory-Selected Components ..............
Adjustment Tools ..........................
Instrument Service Position .....................
Using the TAM ............................
Test Equipment ...........................
Adjustment Indicator ........................
1. High-Voltage Power Supply Adjustment ..............
2. Display Adjustment ......................
3. IF Bandpass Adjustment .....................
4. IF Amplitude Adjustments ...................
5. DC Log Amplifier Adjustments .................
6. Sampling Oscillator Adjustment .................
7. YTO Adjustment .......................
8. First LO Distribution Amplifier Adjustment ............
9. Tracking Generator Power Level Adjustments ...........
10. Frequency Response Adjustment ................
11. Calibrator Amplitude Adjustment ................
12. 10 MHz Reference Adjustment (Non-Option 003 only) .......
13. Demodulator Adjustment ....................
14. External Mixer Bias Adjustment ................
Contents-l
l-l
l-2
l-2
l-3
l-6
l-6
1-6
l-7
l-7
1-8
1-8
l-8
l-8
1-8
1-11
2-l
2-2
2-2
2-2
2-2
2-3
2-3
2-9
2-9
2-9
2-12
2-14
2-20
2-25
2-29
2-33
2-37
2-40
2-42
2-45
2-48
2-50
2-52
2-55

15. External Mixer Amplitude Adjustment ..............
2-57
16. Second IF Gain Adjustment ..................
2-60
17. Signal ID Oscillator Adjustment .................
2-63
18. 600 MHz Amplitude Adjustment ................
2-66
19. 10 MHz Reference Adjustment (Option 003) ...........
2-68
20. Tracking Oscillator Adjustment (Option 002) ...........
2-71
3. Assembly Replacement
Access to Internal Assemblies ......................
3-2
Cable Color Code ...........................
3-2
Procedure 1. Analyzer Cover .....................
3-3
Procedure 2. Al Front Frame/Al8 CRT ................
3-4
Procedure 3. AlAl Keyboard/Front Panel Keys ............
3-11
Procedure 4. AlA RPG ......................
3-12
Procedure 5. A2, A3, A4, and A5 Assemblies .............
3-13
Procedure 6. A6 Power Supply Assembly ...............
3-19
Procedure 7. A6Al High Voltage Assembly ..............
3-22
Procedure 8. A7 through Al3 Assemblies ...............
3-25
A7 1st LO Distribution Amplifier ...................
3-28
A8 Low Band Mixer .........................
3-29
A9 Input Attenuator ........................
3-30
A10 Tracking Generator (Option 002) .................
3-31
AllYTO .............................
3-32
Al3 Second Converter ........................
3-33
Procedure 9. Al4 and Al5 Assemblies ................
3-34
Procedure 10. Al7 CRT Driver ....................
3-37
Procedure 11. Bl Fan ........................
3-38
Procedure 12. BTl Battery .....................
3-39
Procedure 13. Rear Frame/Rear Dress Panel ..............
3-40
Procedure 14. W3 Line Switch Cable .................
3-44
Procedure 15. EEROM (A2U501) ..................
3-50
Procedure 16. A21 OCXO (Option 003) ................
3-51
4. Replaceable Parts
Ordering Information .........................
Direct Mail-Order System ......................
Direct Phone-Order System .....................
Parts List Format ...........................
Firmware-Dependent Part Numbers ...................
4-l
4-l
4-2
4-2
4-2
5. Major Assembly and Cable Locations
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-l
Contents-2

6. General Troubleshooting
Introduction .............................
Assembly Level Text ........................
Block Diagrams ...........................
Assembly Test Points ........................
Pad.. .............................
Test Jack ............................
Ribbon Cables ...........................
WR PROT/WR ENA Softkey Menus .................
Troubleshooting to a Functional Section .................
Using the TAM ............................
Diagnostic Functions ........................
TAM Requirements .........................
Test Connectors ..........................
Revision Connectors ........................
Inconsistent Results .........................
Erroneous Results ..........................
Blank Display ...........................
Automatic Fault Isolation ......................
Display/Power Supply .......................
Controller Check .........................
ADC/Interface Check .......................
IF/LOG Check ..........................
LO Control Check ........................
RF Check ............................
Manual Probe Troubleshooting ....................
Cal Osc. Troubleshooting Mode ...................
Error Messages ............................
Viewing Multiple Messages ......................
Error Message Elimination ......................
System Analyzer Programming Errors (100 to 150) ...........
ADC Errors (200 to 299) .......................
LO and RF Hardware/Firmware Failures (300 to 399) ..........
YTO Loop Errors (300 to 301) ...................
Roller PLL Errors (302 to 316) ...................
YTO Loop Errors (317 to 318) ...................
Roller Oscillator Errors (321 to 329) .................
YTO Loop Errors (331) ......................
600 MHz Reference Loop (333) ...................
YTO Leveling Loop (334) .....................
Sampling Oscillator (335) .....................
Automatic IF Errors (400 to 599) ...................
System Errors (600 to 651) ......................
Digital and Checksum Errors (700 to 799) ...............
EEROM Checksum Errors (700 to 704) ...............
Program ROM Check-sum Errors (705 to 710) ............
RAM Check Errors (711 to 719) ..................
Microprocessor Error (717) .....................
Battery Problem (718) ........................
Model Number Error (719) ......................
System Errors (750 to 757) ......................
6-1
6-l
6-l
6-2
6-2
6-2
6-2
6-6
6-8
6-10
6-10
6-11
6-11
6-11
6-12
6-12
6-12
6-12
6-12
6-12
6-13
6-13
6-13
6-13
6-13
6-14
6-15
6-15
6-16
6-16
6-17
6-18
6-18
6-18
6-20
6-20
6-21
6-21
6-22
6-22
6-22
6-31
6-31
6-31
6-32
6-33
6-33
6-33
6-34
6-34
Contents-3

Option Module Errors (800 to 899) ..................
6-34
User-Generated Errors (902 to 904) ..................
6-34
Block Diagram Description .......................
6-35
RF Section .............................
6-36
A7 LODA ............................
6-36
A8 Low Band Mixer ........................
6-36
A9 Input Attenuator .......................
6-36
All YTO ............................
6-36
Al3 Second Converter .......................
6-37
A15Al Second IF Distribution Amplifier (P/O A15) ..........
6-37
Third Converter (P/O A15) ....................
6-37
Flatness Compensation Amplifiers (P/O A15) ............
6-37
Synthesizer Section .........................
6-37
Sweeping the First LO .......................
6-37
Reference PLL (P/O A15) .....................
6-38
YTO PLL (A7, All, P/O A14, P/O A15) ..............
6-38
Offset Lock Loop (P/O A15) ....................
6-38
Roller Oscillator PLL (P/O A14) ..................
6-39
IF Section .............................
6-39
A4 LOG Amplifier/Cal Oscillator assembly ..............
6-40
A5 IF Assembly .........................
6-40
ADC/Interface Section .......................
6-41
ADC ..............................
6-42
Log Expand/Video Functions (P/O A3) ...............
6-42
Triggering ............................
6-42
Controller Section ..........................
6-42
EEROM .............................
6-43
Firmware ............................
Display ASM ...........................
Display/Power Supply Section ....................
A6 Power Supply .........................
Al7 CRT Display Driver ......................
6-43
6-43
6-43
6-43
6-43
7. ADC/Interface Section
Troubleshooting Using the TAM ....................
Automatic Fault Isolation ......................
Keyboard/RPG Problems .......................
Keyboard Interface .........................
RPG Interface ...........................
Triggering Problems ..........................
Flatness Control (RF Gain DACs) ...................
A3 Assembly’s Video Circuits .....................
Log Offset/Log Expand .......................
Video MUX ............................
Video Filter ............................
Video Filter Buffer Amplifier .....................
Positive/Negative Peak Detectors ...................
Peak Detector Reset .........................
Rosenfell Detector .........................
ADCMUX .............................
Variable Gain Amplifier (VGA) ....................
7-4
7-4
7-7
7-7
7-8
7-9
7-11
7-12
7- 14
7-15
7-15
7-16
7-17
7-18
7-18
7-19
7-21
Contents-4

Track and Hold ...........................
A3 Assembly’s ADC Circuits ......................
ADC Control Signals ........................
ADC Start/Stop Control .......................
ADC ASM .............................
ADC ...............................
Ramp Counter ...........................
A3 Assembly’s Control Circuits .....................
Analog Bus Drivers .........................
Analog Bus Timing .........................
Interface Strobe Select ........................
8. IF Section
Troubleshooting Using the TAM ....................
Troubleshooting A4 Log Amplifier with the TAM ............
Troubleshooting A5 with the TAM ..................
Troubleshooting A4 Cal Oscillator with the TAM ............
Automatic IF Adjustment .......................
Parameters Adjusted ........................
Requirements ............................
Performance Test Failures .......................
IF Gain Uncertainty Performance Test .................
Scale Fidelity Performance Test ....................
Resolution Bandwidths Performance Tests ...............
A4 Assembly’s Log Amplifier Circuits ..................
Log Amplifier ...........................
Linear Amplifiers ..........................
Video Offset ............................
Video Output ...........................
Frequency Counter Prescaler/Conditioner
...............
AM/FM Demodulator .........................
4.8 kHz IF Filters ..........................
4.8 kHz and 10.7 MHz IF Filters ...................
10.6952 MHz VCXO .........................
Input Switch ............................
LO Switch .............................
Synchronous Detector ........................
Limiter .............................
Isolation Amplifier ........................
Detector/Mixer ..........................
Log Offset/Gain Compensation ....................
Log Offset Compensation .....................
Log Gain Compensation ......................
Video Mux .............................
A5 IF Section ............................
IF Signature ............................
Common IF Signature Problems ...................
1 MHz Resolution Bandwidth Problems ................
30 kHz Resolution Bandwidth Problems ................
3 kHz and 10 kHz Resolution Bandwidth Problems ...........
Step Gains .............................
7-21
7-22
7-22
7-23
7-24
7-24
7-25
7-26
7-26
7-27
7-28
8-3
8-4
8-4
8-8
8-9
8-10
8-11
8-12
8-12
8-13
8-13
8-14
8-14
8-15
8-16
8-16
8-17
8-17
8-17
8-18
8-19
8-19
8-19
8-20
8-20
8-20
8-20
8-21
8-21
8-21
8-21
8-22
8-23
8-28
8-30
8-32
8-32
8-33
Contents-5