Level Offset Level offset lets you compensate for a device on the
signal generator’s output that alters the RF output
power level at the point of interest. For example, the
power level at the test device may be less or more
than the displayed power level because of the loss
through an external transmission line or the gain of
an amplifier located between the 681XXC RF output
and the test device. Using the level offset function,
you can apply a constant to the displayed power
level that compensates for this loss or gain. The dis-
played power level will then reflect the actual power
level at the test device.
Toenter an offset value and apply it to the displayed
power level, go to the Level Menu. Then press
Edit Offset . As shown in the following menu, this
opens the offset parameter for editing.
Edit the current offset value using the cursor con-
trol key or rotary data knob or enter a new offset
value using the keypad and appropriate terminator
key.To close the open offset parameter when you are
done, press Edit Offset or make another menu selec-
tion.
Press Offset to apply the offset to the displayed
power level. In this example, a+2.00 dB offset is ap-
plied to L1.L1 then displays a power level of
+2.00 dBm.
3-52 681XXC OMLOCAL (FRONT FIXED POWER
PANEL) OPERATION LEVEL OPERATION
OFFSET
When Offset is selected ON, this
status message is displayed on all
menudisplays to remind the opera-
torthat a constant (offset) has been
applied to the displayed power
level.