tion test procedures and contain test information for all 681XXB mod-
els.
5-4
INITIAL 681XXB
CHECKOUT
Before starting the operation verification tests in this chapter, perform
an initial checkout of the 681XXB to be tested. This initial checkout
consists of applying power to the sweep generator, verifying that it
passes self-test, and resetting it to the factory default parameters.
Power Up
First, verify that the rear panel line voltage selector
is set for the correct line voltage, then connect the
681XXB to the power source. This automatically
places the sweep generator in operation (front panel
OPERATE
LED on).
During power up, the sweep generator loads its oper-
ating program then returns to the exact setup it was
in when last turned off.
Self Test
Next, perform a self-test of the signal generator to in-
sure proper operation of the instrument PCBs and
other internal assemblies.
To self-test the signal generator, press
SYSTEM
.
Then, press the System Menu soft-key
Selftest
.
When the self-test is complete, the sweep generator
displays the main CW menu.
NOTE
Error conditions detected during self-test
are displayed as error messages on the data
display. They should be corrected before con-
tinuing. Refer to Chapter 6 for a listing of
error messages and descriptions.
Resetting the
681XXB
The sweep generator should be reset to the factory-
selected default parameters before commencing op-
eration verification testing.
To reset the 681XXB, first press
SYSTEM
, then
press
Reset
. The sweep generator resets to the CW
frequency mode and displays the CW Menu.
Warmup
Time
When the sweep generator is turned on, allow one
hour of warmup time before performing operational
verification testing. This will assure stable operation
of the instrument.
OPERATION
INITIAL 681XXB
VERIFICATION
CHECKOUT
5-4
681XXB OM
