Power Level
Accuracy
Test Proce-
dure
Power level accuracy is checked by stepping the
power down in 1 dB increments from its maximum
rated power level.
Step 1
Set up the 681XXB as follows:
a. Reset the instrument by pressing
SYSTEM
, then
Reset
. The CW
Menu is displayed.
b. Press
Edit F1
to open the current fre-
quency parameter for editing.
c. Set F1 to the CW frequency noted on
the test record for the model being
tested.
d. Press
Edit L1
to open the current
power level parameter for editing.
e. Set L1 to the power level noted on the
test record.
Step 2
Measure the output power level with the
Power Meter and record the reading on
the test record.
Step 3
Verify that the Power Meter reading
meets the specifications stated on the test
record.
Step 4
Set L1 to the next test power level. Record
the Power Meter reading on the test re-
cord.
Step 5
Repeat step 4 for the other levels listed on
the test record for the current CW fre-
quency.
Step 6
Repeat steps 1 thru 5 for all CW frequen-
cies listed on the test record.
OPERATION
POWER LEVEL ACCURACY
VERIFICATION
AND FLATNESS TESTS
5-14
681XXB OM
