Agilent Technologies HP 8719D Service Manual page 282

Service Modes Menu
To access this menu, press:
Note
If the instrument displays the PHASE LOCK CAL FAILED message,
between DAC numbers and frequency varies from instrument
to instrument. The DAC numbers and frequencies below are
guidelines only.
allows you to control and monitor various circuits
for troubleshooting.
tests the Al3 and Al4 fractional-N circuits. It allows
you to directly control and monitor the output
frequency of the fractional-N synthesizer (60 MHz to
240 MHz).
Set the instrument to CW sweep mode and then
set FRACN TUNE ON. Change frequencies with
the front panel keys or knob. The output of the
high band) or A14J2 LO OUT (in low band) with an
oscilloscope, a frequency counter, or a spectrum
analyzer. Signal jumps and changes in shape at 20
MHz and 30 MHz when tuning up in frequency, and
at 29.2 MHz and 15 MHz when tuning down, are due
to switching of the digital divider. This mode can
be used with the SRC TUNE mode as described in
"Source Troubleshooting" chapter.
accesses the functions that allow you to adjust the
source:
keys below. me r&tionsfip
frequency tune modes.
Service Key Menus and Error Messages
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