Zeroing And Calibrating The Power Meter; Zeroing; Calibration - Keysight Technologies EPM-P Series Programming Manual

1 Power Meter Remote Operation

Zeroing and Calibrating the Power Meter

This section describes how to zero and calibrate the power meter.
The calibration and zeroing commands are overlapped commands refer to
the operation complete commands"
commands are complete.

Zeroing

Zeroing adjusts the power meter's specified channel for a zero power reading with
no power applied to the power sensor.
The command used to zero the power meter is:
CALibration[1|2]:ZERO:AUTO ONCE
The command assumes that there is no power being applied to the sensor. It turns
the power reference oscillator off, then after zeroing, returns the power reference
oscillator to the same state it was in prior to the command being received.
When to zero?
Zeroing of the power meter is recommended:
– when a 50°C change in temperature occurs.
– when you change the power sensor.
– every 24 hours.
– prior to measuring low level signals. For example, 10 dB above the lowest

Calibration

Calibration sets the gain of the power meter using a 50 MHz 1 mW calibrator as a
traceable power reference. The power meter's POWER REF output or a suitable
external reference is used as the signal source for calibration. An essential part of
calibrating is setting the correct reference calibration factor for the power sensor
you are using. The 8480 Series power sensors and N8480 Series power sensors
with Option CFT require you to set the reference calibration factor. All E-Series
power sensors and N8480 Series power sensors (excluding Option CFT) set the
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specified power for your power sensor.
on page 113 to determine when the
Keysight EPM-P Series Programming Guide
"Using