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3-9 FIXED POWER LEVEL
OPERATION
The signal generator provides leveled output power over a maximum
range of up to 33 dB (up to 149 dB with Option 2) for CW and sweep
frequency operations. Units with Option 15A provide leveled output
power over a maximum range of up to 27 dB (up to 141 dB with Op
-
tion 2). The following paragraphs describe how to place the signal gen
-
erator in fixed (non-swept) power level mode, select a power level for
output, select logarithmic or linear units, and activate level offset. Use
the Fixed (Non-Swept) Power Level Mode menu map (Chapter 4, Fig
-
ure 4-7) to follow the menu sequences.
Selecting
Fixed Power
Level Mode
To place the 681XXC in a fixed power level mode
from a CW or sweep (analog, step, or manual) fre
-
quency menu, press the main menu key
LEVEL/ALC
SELECT
At the resulting menu display, press Level . The
Level Menu (below) is displayed.
This menu lets you perform the following:
q
Edit the power level parameter.
q
Edit the level offset parameter.
q
Turn level offset on/off.
Selecting a
Power Level
There are several ways to select a power level for
output. You can (1) edit the current power level, (2)
enter a new power level, or (3) select one of the 10
preset power level parameters.
Editing the Current Power Level
Press Edit L1 to open the power level parameter,
then edit the current power level using the cursor
control key or the rotary data knob. To close the
open power level parameter, press Edit L1 or make
another menu selection.
Entering a New Power Level
Press Edit L1 to open the power level parameter,
then enter the new power level using the keypad
681XXC OM 3-49
LOCAL (FRONT FIXED POWER
PANEL) OPERATION LEVEL OPERATION