Specifications 5
E4418B Power Meter User’s Guide 169
Power Sensor Specifications
Definitions
Zero Set
In any power measurement, the power meter must initially be set to zero with
no power applied to the power sensor. Zero setting is accomplished within the
power meter by digitally correcting for residual offsets.
Zero Drift
This parameter is also called long term stability and is the change in the power
meter indication over a long time (usually one hour) for a constant input
power at a constant temperature, after a defined warm- up interval.
Measurement Noise
This parameter is also known as short term stability and is specified as the
change in the power meter indication over a short time interval (usually one
minute) for a constant input power at a constant temperature.
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