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Power Level
Flatness Test
Procedure
Power level flatness is tested by measuring the out-
put power level variation during a full band sweep;
first in the manual sweep mode (690XXB/691XXB
models), then in analog sweep mode (691XXB mod-
els only).
1. Set up the 690XXB/691XXB as follows for a
manual sweep power level flatness test:
a. Reset the instrument by pressing
SYSTEM
,
then
Reset
. The CW Menu is displayed.
b. Press
Manual
to place the instrument in the
manual sweep frequency mode and display the
Manual Sweep Menu.
c. With the Manual Sweep Menu displayed, press
the main menu key
FREQUENCY
CONTROL
The Sweep Frequency Control Menu is then
displayed.
d. Press
Full
to select a full range frequency
sweep.
e. Press
Edit L1
to open the current power level
parameter for editing.
f. Set L1 to the power level indicated on the test
record.
g. Now, return to the Manual Sweep Menu by
pressing the main menu key
CW/SWEEP
SELECT
h. At the Manual Sweep Menu, press the soft-key
Num of Steps
to open the number-of-steps pa-
rameter for editing.
i. Set the number-of-steps to 200.
2. Using the rotary data knob, sweep the 690XXB/
691XXB through the full frequency range. Meas-
ure the maximum and minimum Power Meter
readings and record the values on the Test Re-
cord. Verify that the variation (difference between
the maximum and minimum readings) does not
exceed the value noted on the Test Record.
3-26
690XXB/691XXB MM
PERFORMANCE
POWER LEVEL ACCURACY
VERIFICATION
AND FLATNESS TESTS
Summary of Contents for 680 C Series
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