Level Offset
Level offset lets you compensate for a device on the
CW 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 680XXB
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 displayed power level will then reflect the ac-
tual power level at the test device.
To enter an offset value and apply it to the dis-
played 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
selection.
Press
Offset
to apply the offset to the displayed
power level. In this example, a+2.00 dB offset is
applied to
L1
.
L1
then displays a power level of
+2.00 dBm.
LOCAL (FRONT
FIXED POWER
PANEL) OPERATION
LEVEL OPERATION
OFFSET
When Offset is selected ON, this
status message is displayed on all
menu displays to remind the opera-
tor that a constant (offset) has been
applied to the displayed power level.
3-40
680XXB OM
Summary of Contents for 680 B Series
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