Agilent Technologies HP 8719D Service Manual page 283

Service Key Menus and Error Messages
the phase lock and source assemblies. These keys
allow entry of digital data directly into the DAC
on the All phase lock assembly. When in this
mode:
Instrument does not attempt to phase lock.
q
Residual FM increases.
q
DAC numbers in the range of 3650 through 4095
to generate test port output frequencies from
allows you to enter DAC numbers in the range of
2900 through 4095 to generate test port output
frequencies from 2.3 GHz to 4.9 GHz.
to
allows you enter DAC numbers in the range of
2900 through 4095 to generate test port output
frequencies from 2.3 GHz to 4.9 GHz.
you to enter DAC numbers in the range of
2020 through 4095 to generate test port output
frequencies from 18.2 GHz to 23.2 GHz.
. . . . . .
control (ALC) on and off.
automatically attempts to determine new pretune
values when the instrument encounters phase lock
problems (for example, "harmonic skip"). With
not change, like when they are attempting to
determine new prettme values, so troubleshooting
the phase-locked loop circuits is more convenient.
This function may also be turned off to avoid
pretune calibration errors in applications where
there is a limited frequency response in the R