Source; Phaselockerrormessages - Agilent Technologies HP 8719D Service Manual

Source

Phase Lock Error Messages
The following list contains all phase lock error messages and their descriptions.
n
The ilrst IF was not detected during the pretune stage of phase lock.
n
The first IF was detected at the pretrme stage but phase lock could not be
acquired thereafter.
n
Phase-lock was acquired but then lost.
n
An internal phase lock calibration routine is automatically executed at
power-on, when pretune values drift, or when phase lock problems are
detected. A problem aborted a calibration attempt.
POSSIBLE FALSE LOCK
n
The analyxer is achieving phase lock but possibly on the wrong harmonic
comb tooth.
SWEEP TIEE TOO FAST
n
The fractional-N and the digital lF' circuits have lost synchronization.
The error messages listed above are usually indicative of a source failure or
improper instrument con@uration. As a prelimimuy step, ensure that all option
jumper cables are properly COMeCted. lb ensure that the R channel input is
receiving at least -35 dBm power, perfom the following steps:
1. Perform steps 1 and 2 of the "Source Prettme Correction Constants"
procedure located in Chapter 3. Make note of the DAC number that is
displayed and then abort the procedure
2.
3. Enter the DAC number determined from step 1 and press a).
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