Self-Testing
the 681XXB
The 681XXB firmware includes internal diagnostics
that self-test the instrument. These self-test diag-
nostics perform a brief go/no-go test of most of the
PCBs and other internal assemblies. If the sweep
generator fails self-test, an error message is dis-
played on the data display. Error messages and de-
scriptions are listed in the Operator Maintenance
chapter of this manual.
You can perform a self-test of the sweep generator
at any time during normal operation. To perform a
self-test from any menu, press
SYSTEM
. Then,
when the System Menu (below) is displayed, press
Selftest
.
Resetting to
Default Pa-
rameters
You can reset the 681XXB to the factory-selected de-
fault parameter values at any time during normal
operation. The default parameters are shown in Ta-
ble 3-1 on the following page.
NOTE
Resetting the instrument clears the setup
presently in place. If these parameter val-
ues are needed for future testing, save
them as a stored setup before resetting
the sweep generator. (For information on
saving/recalling instrument setups, refer
to paragraph 3-14.)
To reset the sweep generator, press
SYSTEM
.
When the System Menu (above) is displayed, press
Reset
.
LOCAL (FRONT
INSTRUMENT
PANEL) OPERATION
START-UP
681XXB OM
3-13
Changed: November 1995
During self-test with
RF OUTPUT
set to
ON
, the output
power level is set to 0 dBm. Always disconnect sensitive
equipment from the unit before performing self-test.
CAUTION
