Agilent Technologies EPM-P Series Programming Manual page 150

Non-SCPI Command Extensions
The EPM-P series power meters have several command extensions to the
SCPI standard: RELative and DIFFerence.
Optional Parameters
CONFigure, FETCh?, READ? and MEASure? have the following three
optional parameters:
• An expected power value.
• A resolution.
• A source list.
Expected Power Value
An <expected_value> parameter is only required if you are using an
E-Series power sensor or N8480 Series power sensor (excluding Option
CFT). It has no effect for 8480 Series power sensors and N8480 Series
power sensors with Option CFT. The value entered determines which of
the power sensor's two ranges is used for the measurement. If the current
setting of the power sensor's range is no longer valid for the new
measurement, specifying the expected power value decreases the time
taken to obtain a result.
Resolution
The <resolution> parameter sets the resolution of the specified window.
This parameter does not affect the resolution of the GP-IB data but it does
affect the auto averaging setting. Where a channel is set up in both the
upper and lower window and the <resolution> parameter settings for
these windows are different, the highest resolution setting is taken to
calculate the averaging. If you are making a ratio or difference
measurement the <resolution> parameters are applied to both
channels.
Source List
The <source list> parameter is used to define:
• What channel the measurement will be made on, for a dual
channel measurement.
• Whether the calculation is channel A-B or B-A, for a dual channel
measurement.
• Whether the calculation is A/B or B/A, for a ratio measurement.
EPM-P Series Power Meters Programming Guide
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Measurement Commands
Measurement Commands
2-3