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HP4402.book : chapter2.fm 32 Wed Apr 23 15:29:05 1997
Power Meter Operation
Setting Measurement Limits
2-32 HP EPM-442A User’s Guide
Setting Measurement Limits
The power meter can be configured to verify the power being measured
against an upper and/or lower limit value. The range of values that can be
set for upper and lower limits is -150 dBm to 230 dBm. The default upper
limit is 90.00 dBm and the default lower limit is -90.00 dBm.
To set the limits:
1. Press , , , . The current
setting of the maximum and minimum limits are displayed under
the and softkeys respectively.
2. To change either of these settings press the appropriate softkey.
The power meter displays the current value in a pop up window.
Modify this value (see below) until the desired value is displayed.
■ 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 the appropriate measurement units.
Limits can be disabled and re-enabled simply by pressing
.
A typical application for this feature is shown in Figure 2-7.
Figure 2-7: Limits Checking Application
System
Inputs
A Input Settings
More
Limits
Max Min
Limits Off On
Power Meter
Swept Source
CHANNEL A
INPUT
OUT
IN
Device
Under Test
T
OUT