Agilent Technologies HP 8719D Service Manual page 309

PHASE LOCK CALFAILED
Error Number An internal phase lock calibration routine is automatically
4 executed at power-on, preset, and any time a loss of phase lock
is detected. This message indicates that phase lock calibration
was initiated and the iirst IF detected, but a problem prevented
the calibration from completing successfully. Refer to Chapter
3, "Adjustments and Correction Constants" and execute pretune
correction (test 43). This message may appear if you connect a
mixer between the RF output and R input before turning on
frequency offset mode. Ignore it: it will go away when you turn
on frequency offset. This message may also appear if you turn
on frequency offset mode before you define the offset.
PHASE LOCK LOST
Error Number Phase lock was acquired but then lost. Refer to the "Source
Troubleshooting" chapter.
8
POSSIBLE FALSE LOCK
Error Number Phase lock has been achieved, but the source may be phase
6 locked to the wrong harmonic of the synthesizer, Perform the
source pretune correction routine documented in the
"Adjustments and Correction Constants" chapter.
Service Key Menus and Error Messages