Agilent Technologies HP 83711A - Page 7

Contents
1. Troubleshooting
Introduction .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
..
..
..
.
.
.
.
.
.
.
1-1
Prior to
Beginning Troubleshooting
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
..
..
1-1
The Service
Position
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
..
..
..
..
.
.
1-1
Power
Supply V
erication
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
..
..
..
..
1-1
Safety Considerations
..
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
..
..
..
..
.
1-2
W
arnings
and
Cautions
.
.
.
.
.
.
.
.
.
.
.
.
.
..
..
..
..
.
.
.
.
.
.
1-2
Before
Applying
P
ower
.
.
.
.
.
.
.
.
.
.
.
.
.
..
..
..
..
.
.
.
.
.
1-2
After-Service
Safety
Checks
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
..
..
.
.
.
.
1-3
ESD
Precautions
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
1-3
Recommended
T
est
Equipment
..
..
..
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
1-3
Service A
ccessories
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
..
..
..
.
.
.
.
.
1-4
TORX
R

Screwdrivers .
..
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
..
..
..
. 1-4
Pozidrive
Screwdrivers
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
..
..
.
.
.
1-4
Hardware .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
..
..
.
.
.
.
.
.
.
1-4
Major Assemblies
,
P
arts
,
and
Cable
Locations
.
.
.
.
.
.
.
.
.
.
.
.
.
.
..
1-4
Test
P
oint
Locations
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
..
.
.
.
.
.
.
1-4
Service
Aids
on
Printed
Circuit
Boards
.
.
.
.
.
.
.
.
.
.
.
..
.
.
.
.
.
.
1-5
Other
Service
Documents
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
..
.
.
.
.
.
.
.
.
1-5
Cleaning
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
..
.
.
.
.
.
.
.
.
.
.
.
.
.
.
1-5
Cleaning
Intervals
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
..
.
.
.
.
.
.
.
.
.
.
1-5
Cleaning
Solution
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
..
..
.
.
.
.
.
.
.
.
1-5
12-Month
Cleaning
.
.
.
.
.
.
.
.
.
..
..
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
1-5
After
Repair
Calibration
.
.
.
.
.
.
.
.
..
..
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
1-6
Main
Troubleshooting
.
.
.
.
.
.
.
..
..
..
..
.
.
.
.
.
.
.
.
.
.
.
.
.
1-7
Microprocessor
Assembly
(A3)
Troubleshooting
.
.
.
.
.
.
.
..
..
..
.
.
1-9
ABUS
Errors
.
.
.
.
.
.
.
.
.
..
..
..
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
1-9
0.5
V/GHz
Output
Errors .
..
..
..
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
. 1-10
LO
Synthesizer
and
Reference Assembly
(A6) Troubleshooting
..
..
.
.
.
.
1-11
Data
Readback Errors
..
..
..
..
..
..
.
.
.
.
.
.
.
.
.
.
.
..
. 1-11
ABUS
Errors
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
1-11
Oscillator Cold Error . . . . . . . . . . .
.... .... .... ....
1-12
LO Synthesizer and Reference Unlocked/Divide V
oltage Errors
......
. 1-13
YO Loop and Oset Synthesizer Assembly (A7) Troubleshooting . . . . . . . .
1-16
Data Readback Errors
.. .... .... .... .... ....
....
1-16
ABUS
Error........................
.......
1-17
Oset
Synthesizer Incorrect Frequency/Unlocked Errors . . . . . . . . . .
1-18
YIG Driver
Assembly (A9) Troubleshooting
.... .... .... .... .
1-20
Data Readback Errors
.. .... ...
.................
1-20
ABUS Errors .... .... .... .... ... .... .... ... 1-20
MSB Errors .... .... .... .... .... .... ... .... 1-21
Low/High Band Voltage Errors ...................... 1-23
ALC Assembly (A10) Troubleshooting . . . . . . . . . . . . . . . . . . . . 1-25
Data Readback Errors .. .... .... .... .... .... .... 1-25
ABUS Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
DAC Errors ............................... 1-26
Contents-1