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HP4402.book : chapter2.fm 5 Wed Apr 23 15:29:05 1997
Power Meter Operation
Calibrating the Power Meter
HP EPM-442A User’s Guide 2-5
Calibration Procedure Using HP E-Series Power Sensors
The following procedure describes how you calibrate the power meter with
an HP E-series power sensor. Since the power meter automatically
downloads the HP E-series power sensor’s calibration table there is no
requirement to enter the reference calibration factor. The power meter
identifies that an HP E-series power sensor is connected and will not
allow you to select certain softkeys. The text on these softkeys appears
grayed out.
Note The following procedure details the calibration for channel A. To
calibrate channel B use the same procedure using the equivalent
channel B softkeys.
1. Press .
2. Connect the power sensor to the POWER REF output.
3. 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 with HP E-series power
sensors connected to both channels.
• Press , .
• Connect the channel A power sensor to the POWER REF output.
• Press then wait till the calibration is completed.
• Remove the channel A power sensor from the POWER REF
output.
• Connect the channel B power sensor to the POWER REF output.
• Press then wait till the calibration is completed.
Calibration Procedure using HP 8480 Series Power Sensors
The following procedure describes how you calibrate the power meter with
the HP 8480 series power sensors.
There are a variety of different methods to connect the power sensors to
the power meter depending on the model of power sensor you are using.
Refer to Table 2-1 on page 2-7 for details on connecting different power
sensor models.
Zero
Cal
Cal Cal A
Zero
Cal
Cal
Cal A
Cal B