Power Meter Operation

Making Measurements using Sensor Calibration Tables

“State” field indicates if any sensor calibration tables are currently selected. The “Sensor Tbls” screen is displayed as shown in Figure 2-1.

Figure 2-1: “Sensor Tbls” Screen

 

Making the Measurement

 

To make the power measurement, you zero and calibrate the power meter,

 

then set it for the frequency of the signal you want to measure. The power

 

meter automatically selects the calibration factor from the sensor

 

calibration table.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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, zero the power

 

meter using

 

 

 

 

 

 

 

in step “2”, then follow this procedure for

 

Zero Both

 

channel A then repeat step “3” through to step “9” using the

 

equivalent channel B softkeys.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.

Press

 

.

 

 

 

 

Zero

 

Cal

 

2.

Press

 

 

 

 

 

 

 

. During zeroing, which takes approximately 10

 

 

 

 

 

 

 

 

 

 

Zero A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

seconds, the wait symbol is displayed.

 

3.

Press

 

. The setting of the reference calibration factor is

 

Cal

 

 

obtained from the sensor calibration table and displayed under the

 

 

 

 

 

 

softkey.

 

 

 

A Ref CF

 

4.

Connect the power sensor to the POWER REF output.

 

5.

Press

 

 

to calibrate the power meter. During calibration the

 

 

Cal A

 

 

wait symbol is displayed. (The power meter automatically turns

 

 

on the POWER REF output.)

2-14

HP EPM-442A User’s Guide