3-10 POWER LEVEL SWEEP
OPERATION Thesignal generator provides leveled output power sweeps at CW fre-
quencies and in conjunction with frequency sweeps (analog and step).
Power level sweeps can be from a high level to a low level or vice
versa. Power level sweeps can be selected to be linear or logarithmic.
The following paragraphs provide descriptions and operating instruc-
tions for the CW power sweep mode and the sweep frequency/ step
power modes. Use the CW Power Sweep Mode and Sweep Frequency/
Step Power Mode menu maps (Chapter 4, Figures 4-8 and 4-9) to fol-
low the menu sequences.
Selecting CW
Power Sweep
Mode
In the CW power sweep mode, output power steps
between any two power levels at a single CW fre-
quency.Available menus let you set or select the
sweep range, the step size, the dwell-time-per-step,
and the type of power sweep (linear or logarithmic)
and sweep trigger.
Toplace the 681XXC in a CW power sweep mode
from a CW frequency menu, press the main menu
key
LEVEL/ALC
SELECT
At the resulting menu display,press Lvl Swp . The
CW Level Sweep Menu (below) is displayed.
This menu lets you perform the following:
qSelect a power level sweep range (edit the
sweep start and stop power level parameters).
qGo to the sweep ramp menu (set the dwell-
time-per-step, the step size or number of steps,
and select a sweep trigger).
681XXC OM 3-53
LOCAL (FRONT POWER LEVEL
PANEL) OPERATION SWEEP OPERATION
Performing power level sweeps that cross step attenuator
switch points can cause excessive wear on the switches and
reduce the life expectancy of the step attenuator.
CAUTION