Fetches the phase noise power spectral density (PSD) trace for signals containing an OFDM payload.

Phase noise estimates are derived from the common pilot error estimates. When you set the OFDMModAcc Averaging Enabled property to True, this VI returns the mean of the phase noise PSD computed for each averaging count.


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Inputs/Outputs

  • cstr.png Selector String —

    Selector String specifies a selector string comprising of the signal name, result name, and segment number. If you do not specify the signal name, the default signal instance is used. The default value is "segment0".

    Example:

    "segment0"

    "signal::sig1/segment0"

    "result::r1/segment0"

    "signal::sig1/result::r1/segment0"

    You can use the RFmxWLAN Build Segment String VI to build the selector string.

  • cgenclassrntag.png Instrument Handle In —

    Instrument Handle In specifies the RFmx session refnum. Instrument Handle In is obtained from the RFmxInstr Initialize NIRFSA VI or the RFmxInstr Initialize NIRFSA (Array) VI.

  • cdbl.png Timeout (s) —

    Timeout specifies the timeout 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. This value is expressed in seconds. The default value is 10.

  • cerrcodeclst.png error in (no error) —

    error in describes error conditions that occur before this node runs. This input provides standard error in functionality.

  • igenclassrntag.png Instrument Handle Out —

    Instrument Handle Out passes a reference of your RFmx session to the next VI.

  • icclst.png Phase Noise PSD Mean (dBc/Hz) —

    Phase Noise PSD Mean returns the mean of the phase noise PSD trace.

  • idbl.png x0 —

    x0 returns the start frequency of the phase noise PSD mean trace. This value is expressed in Hz.

  • idbl.png dx —

    dx returns the frequency intervals between data points in the phase noise PSD mean trace. This value is expressed in Hz.

  • i1dsgl.png y —

    y returns an array of the mean of phase noise PSD. This value is expressed in dBc/Hz.

  • ierrcodeclst.png error out —

    error out contains error information. This output provides standard error out functionality.