General Power Meter Functions 2
N1913/1914A EPM Series Power Meters User’s Guide 77
Zeroing and Calibrating the Power Meter
This section describes how to zero and calibrate the power meter. You
should always zero the power meter prior to calibrating it.
Zeroing the Power Meter
Zeroing adjusts the power meter for a zero power reading with no power
applied to the power sensor. During zeroing, which takes approximately 10
seconds, the wait symbol is displayed.
Figure 2-41 Zeroing pop-up
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.
To zero the power meter:
• Press and the channel softkey.
•The Zeroing pop- up is displayed.
On dual channel meters you can zero each channel independently or both channels
sequentially by pressing the softkey - choosing , or
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