Source Group Troubleshooting Appendix - Agilent Technologies 8753ES Option 011 Service Manual

Source Troubleshooting

Source Group Troubleshooting Appendix

Source Group Troubleshooting Appendix
Troubleshooting Source Problems with the Analog Bus
The analog bus can perform a variety of fast checks. However, it too is subject to failure
and thus should be tested prior to use. You should have done this in
Troubleshooting Here."
To use the analog bus to check any one of the nodes, press
SERVICE MENU ANALOG BUS IN
S PARAMETERS ANALOG IN Aux Input
followed by . Refer to
x1
Phase Lock Diagnostic Tools
• error messages
• diagnostic routines
Phase Lock Error Messages
All phase lock error messages can result from improper front panel connections.
NO IF FOUND: CHECK R INPUT LEVEL means no IF was detected during pretune: a source
problem. Perform the
NO PHASE LOCK: CHECK R INPUT LEVEL means the IF was not acquired after pretune: a
source problem. Perform the
PHASE LOCK CAL FAILED means that a calculation of pretune values was not successful: a
source or receiver failure. Perform
page 3-10. If the analyzer fails that routine, perform the
page 7-8.
PHASE LOCK LOST means that phase lock was lost or interrupted before the band sweep
ended: a source problem. Refer to
phase lock loop diagnostic service routine. Then troubleshoot the problem by following the
procedures in this chapter.
7-30
. Then press
"Analog Bus" on page 10-20
"A4 Sampler/Mixer Check" on page
"A4 Sampler/Mixer Check" on page
"Source Pretune Correction Constants (Test 48)" on
"Phase Lock Diagnostic Routines,"
Preset
S PARAMETERS
Meas
and enter the analog bus node number
for additional information.
7-8.
7-8.
"A4 Sampler/Mixer Check" on
Chapter 4 , "Start
System
next, to access the
Chapter 7