3 Spectrum Analyzer Mode
3.3 Channel Power Measurement
3.3 Channel Power Measurement
This measurement is used to find the total power present in a specified bandwidth.
Power Spectral Density (signal power normalized to 1Hz) is also reported.
When in WLAN Mode, or when WLAN radio standard is selected in SA Mode, the
peak Power Spectral Density for 1MHz is reported.
Measurement Commands
The general functionality of "CONFigure" on page 2753, "INITiate" on page 2754,
"FETCh" on page 2754, "MEASure" on page 2756, and "READ" on page 2755 are
described in the section SCPI Operation and Results Query in the topic
Programming the Instrument.
Note that, in general, :CONF:<Measurement> resets the specified measurement
settings to their defaults. X-Series permits the addition of the NDEFault node to the
command, which prevents a measurement preset after a measurement switch.
The tables below list setup commands for this measurement and queries to retrieve
results.
Command Function
:INITiate:CHPower
Initiates a trigger cycle for the CHP measurement, but does not return any data.
You must then use :FETC:CHP[n]? to retrieve data
Does not change any measurement settings
:CONFigure?
Returns the long form name of current measurement, in this case, CHPower
:CONFigure:CHPower
Selects CHP measurement with Meas Setup settings in preset state – same as
"Meas Preset" on page 646
:CONFigure:CHPower:NDEFault
Selects CHP measurement without affecting settings
The following queries are used to retrieve data. The type of data returned depends
on the value of n.
Query Function
:FETCh:CHPower[n]?
Retrieves the data defined by n
:MEASure:CHPower
[n]?
Switches to CHP measurement, restores default values, starts the measurement, then
retrieves the data defined by n
:READ:CHPower[n]?
Starts the measurement, then retrieves the data defined by n
548 Spectrum Analyzer Mode User's &Programmer's Reference
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