RFmxSpecAn NF Fetch Cold Source Power VI
- Updated2025-10-13
- 3 minute(s) read
Fetches the power measured by the analyzer when the cold source based noise figure (NF) measurement is performed.

Inputs/Outputs
Selector String
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Selector String specifies a selector string comprising of the signal name and result name. If you do not specify the signal name, the default signal instance is used. If you do not specify the result name, the default result instance is used. The default value is "" (empty string). Example: "" "signal::sig1" "result::r1" "signal::sig1/result::r1" You can use the RFmxSpecAn Build Signal String VI to build the selector string.
Instrument Handle In
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Instrument Handle In specifies the RFmx session refnum. Instrument Handle In is obtained from the RFmxInstr Initialize NIRFSA VI.
Timeout (s)
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Timeout specifies the timeout, in seconds, for fetching the specified measurement. Set this value to an appropriate time, longer than expected for fetching the measurement. A value of -1 specifies that the VI waits until the measurement is complete. The default value is 10.
error in (no error)
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error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
Instrument Handle Out
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Instrument Handle Out passes a reference of your RFmx session to the next VI.
Cold Source Power (dBm)
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Cold Source Power returns the array of powers measured at the frequencies specified by the NF Freq List property. This value is expressed in dBm. A valid result is returned only when you set the NF Meas Method property to Cold Source.
error out
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error out contains error information. This output provides standard error out functionality. |
Selector String
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Instrument Handle In
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Timeout (s)
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error in (no error)
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Instrument Handle Out
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Cold Source Power (dBm)
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error out
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