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HP4402.book : chapter2.fm 8 Wed Apr 23 15:29:05 1997
Power Meter Operation
Making Measurements with the HP E-Series Power Sensors
2-8 HP EPM-442A User’s Guide
Making Measurements with the HP E-Series Power
Sensors
This section describes how to make continuous wave measurements using
the HP E-series power sensors. The HP E-series power sensors have their
sensor calibration tables stored in EEPROM. This allows the frequency
and calibration data to be downloaded to the power meter automatically.
To make measurements, perform the following steps:
1. Zero and calibrate the power meter.
2. Set the frequency for the signal you want to measure.
3. Take a reading.
Procedure
The following procedure details how to make a measurement on channel A
of the power meter. To make a measurement on channel B use the same
procedure using the equivalent channel B softkeys.
1. Ensure that no power is applied to the power sensor.
2. Press .
3. Press . During zeroing, which takes approximately 10
seconds, the wait symbol is displayed.
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.)
6. Press . The current setting of the frequency is displayed
under the softkey.
7. To change this setting press . The power meter displays
the frequency in a pop up window. Modify this frequency (see
below) as desired.
■ Use or to modify the digit on which the cursor is
currently positioned.
■ Use or to move to other digits.
8. To confirm your choice press the appropriate frequency units.
9. Connect the power sensor to the signal to be measured.
10. You must set the display to the type of measurement you require.
This can either be a direct channel measurement, a ratio
Zero
Cal
Zero A
Cal Cal A
Frequency
Cal Fac
A Freq
A Freq