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HP4402.book : chapter2.fm 27 Wed Apr 23 15:29:05 1997
Power Meter Operation
Setting Offsets
HP EPM-442A User’s Guide 2-27
2. The power meter displays the offset value in a pop up window.
Modify this offset (see below) as desired.
■ Use or to modify the digit on which the cursor is
currently positioned.
■ Use or to move to other digits.
3. To confirm your choice press .
4. is automatically set to “On” when a value is
entered using .
Display offsets can be disabled and re-enabled simply by pressing
.
The display offset is a function of the window. That is, if you have selected
a two window display each can have its own offset.
Figure 2-3 and Figure 2-4 display the effects of the channel and display
offsets on the power meter’s displayed reading.
Figure 2-3: Effect of Offsets on a Channel Measurement
Figure 2-4: Effect of Offsets on a Maths Measurement
† Channel Offset entered using , or
,, .
†† Display Offset entered using ,.
dB
Offset Off On
Offset
Offset Off On
Ch Input with
Ch Input
Ch
Offset
†
Display
Offset
††
READING
ON POWER
METER
DISPLAY
Ch Input with Ch Offset and
Ch Offset
Display Offset
ChA Input with Ch Offset
Math, A, B, A-B,
B-A, A/B, B/A,
ChA Input
ChA
Offset
†
ChB Input with Ch Offset
ChB Input
ChB
Offset
†
Display
Offset
††
READING
ON POWER
METER
DISPLAY
Result with
Display Offset Applied
Result
System
Inputs
A Input Settings
B Input Settings
More
Offset
Rel
Offset
Offset