Phase Lock Error - Agilent Technologies 8753ES Option 011 Service Manual

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Source Troubleshooting

Phase Lock Error

Phase Lock Error
Figure 7-1
Basic Phase Lock Error Troubleshooting Equipment Setup
Troubleshooting tools include the assembly location diagram and phase lock diagnostic
tools. The assembly location diagram is on the underside of the instrument top cover. The
diagram shows major assembly locations and RF cable connections. The phase lock
diagnostic tools are explained in the
page 7-30
and should be used to troubleshoot phase lock problems. The equipment setup
shown in
Figure 7-1
Phase Lock Loop Error Message Check
Phase lock error messages may appear as a result of incorrect pretune correction
constants. To check this possibility, perform the pretune correction constants routine.
The four phase lock error messages, listed below, are described in the
Troubleshooting Appendix" on page
• NO IF FOUND: CHECK R INPUT LEVEL
• NO PHASE LOCK: CHECK R INPUT LEVEL
• PHASE LOCK CAL FAILED
• PHASE LOCK LOST
1. Connect the power splitter, RF cable and attenuator to inputs A and R as shown in
Figure
7-1.
7-6
"Source Group Troubleshooting Appendix" on
can be used throughout this chapter.
7-30.
"Source Group
Chapter 7

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