HP EPM-441A User Manual page 123

Zero
Cal
The softkey menu structured to this hardkey affects the channel setup.
Press this hardkey to access the "Zero/Cal" menu which allows you to zero
and calibrate the power meter. Refer to "Calibrating the Power Meter", on
page 2-4 for further information.
Note
HP EPM-441A User's Guide
•
Zero
Press this softkey to adjust channel A for a zero power reading
with no power applied to the power sensor. Refer to "Zeroing the
Power Meter", on page 2-3 for further information.
•
Cal
Press this softkey to calibrate channel A with the connected power
sensor. The POWER REF output is used as the signal source for
calibration and is automatically switched on during this
procedure.
•
Ref CF
Press this softkey to enter a reference calibration factor for
channel A. A value in the range of 1% to 150% can be entered. The
default value is obtained from the sensor calibration table if one is
selected, otherwise it is 100%. Use the
hardkeys to change the value. To confirm your choice press
This softkey cannot be selected when you are using an HP E-series
power sensor.
• Power Ref Off On
Press this softkey to switch the POWER REF output on or off. This
output is used as the signal source for calibration. The default is
"Off".
During calibration the power meter automatically switches the
power reference oscillator on (if it is not already on), then after
calibration it switches it to the state it was in prior to the
calibration.
Front Panel Menu Reference "Zero/Cal" Menu
,
Menu Reference
, and
.
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