Phase Lock Check - HP 8753D Option 011 Service Manual

Figure IFW VE7 here.
Figure 7-26. Typical 1st IF Waveform in FRACN TUNE/SRC TUNE Mode
A

Phase Lock Check

t this point, the 11 phase lock assembly appears to be faulty (its inputs should have been
veri ed already). Nevertheless, you may elect to use the phase lock diagnostic routines or
check the relevant signals at the assembly itself for con rmation.
If external source mode is the only operating mode with phase lock problems,
Note
replace the 11 phase lock assembly.
RAFT
3/21/106 15:13
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Source Troubleshooting 7-31