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7-4
If You Encounter a Problem
If there is no RF signal
The “entry off” is enabled after you press the
ENTRY OFF
key. To return to nor-
mal entry mode, press any function key that has a numeric parameter associ-
ated with it. For example,
START
.
❒
Check that none of the keys are mechanically stuck.
❒
Check that the selected key is designed to accept data.
For example,
SCALE REF
accepts data, but
SYSTEM
does not.
❒
Ensure that you are not attempting to enter a value that is greater than or less
than its limit.
❒
Check that the front panel
“R” HP-IB STATUS
light is
not
illuminated.
If the
“R” HP-IB STATUS
light is illuminated, a test sequence may be run-
ning, or a connected computer controller may be sending commands or in-
structions to, or receiving data from, the instrument. Press
LOCAL
if you want to
return to local control.
If there is no RF signal
❒
Check that the signal at the test ports is switched on.
a
Press
MENU
,
POWER, SOURCE PWR
until
ON
appears on the
SOURCE PWR
softkey
label.
b
Press
MENU
,
POWER
,
POWER TRIP on OFF
until
OFF
appears on the
POWER TRIP
softkey label.
❒
If you are applying external modulation (AM) to the Agilent 8702D, check the
external modulating signal or external gate/trigger signals for problems.
CAUTION
If the error message:
CAUTION: OVERLOAD ON INPUT X, POWER
REDUCED
appears on the display, too much source power is being applied at
the input. In such a case, the input power will need to be reduced before the
source power will remain on.
❒
Look for phase-lock error messages and then contact your nearest Agilent
Technologies office for service. A list of Agilent Technologies service offices is
provided on page 7-8.