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General Power Meter Functions 2
N1911A/1912A P-Series Power Meters User’s Guide 107
Zeroing and Calibrating the P-Series Sensor
This section describes how to zero and calibrate the power meter when
using a P- Series wideband power sensor.
Zeroing
Zeroing adjusts the power meter for a zero power reading on each power
meter channel and P- Series sensor combination. This is achieved without
removing it from a power source. The power meter can be set to
automatically zero on-the-fly while you are using it. Alternatively, you can
perform a zero at your preference. During zeroing a wait symbol is
displayed.
Figure 2-87 Zeroing pop-up
When the P- Series power sensor is initially connected to the power meter,
it automatically performs a Zero and Calibration routine.
When to Zero?
Zeroing of the power meter is recommended:
•When a 5
o
C change in temperature occurs.
Every 24 hours.
Prior to measuring low level signals. For example, 10 dB above the
lowest specified power for your power sensor.
Automatic Zero
The automatic zero can be enabled as follows:
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