Filter
Top Products
HP4402.book : chapter2.fm 6 Wed Apr 23 15:29:05 1997
Power Meter Operation
Calibrating the Power Meter
2-6 HP EPM-442A User’s Guide
Note The following procedure details the calibration for channel A. To
calibrate channel B use the same procedure using the equivalent
channel B softkeys. To calibrate both channels sequentially follow
this procedure for channel A then repeat step “2” through to step
“5” using the equivalent channel B softkeys.
1. Press , .
2. Verify the reference calibration factor of your power sensor with
that displayed under . The value shown is obtained
from the sensor calibration table if one is selected, otherwise it is
the last value set or the default of 100%. If the value is not correct
press . The power meter displays the reference
calibration factor in a pop up window. Modify this reference
calibration factor (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. Connect the power sensor to the POWER REF output.
5. Press to calibrate the power meter. During calibration the
wait symbol is displayed. (The power meter automatically turns
on the POWER REF output.)
Example
To calibrate both channels of the power meter. The reference calibration
factors for the power sensors being 98.8% and 99.4% for channel A and
channel B respectively:
• Press , .
• Press . Use the , , and hardkeys to
enter 98.8. Press .
• Press . Use the , , and hardkeys to
enter 99.4. Press .
• Connect the channel A power sensor to the POWER REF output.
• Press .
• Remove the channel A power sensor from the POWER REF
output.
• Connect the channel B power sensor to the POWER REF output.
• Press .
Zero
Cal
Cal
A Ref CF
A Ref CF
%
Cal A
Zero
Cal
Cal
A Ref CF
%
B Ref CF
%
Cal A
Cal B