Fetches the channel frequency response trace. When you set the OFDMModAcc Averaging Enabled property to True, this VI returns the mean of the channel frequency response trace computed for each averaging count.

Use "segment<n>/chain<k>/stream<l>" as the selector string to read results from this VI.


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Inputs/Outputs

  • cstr.png Selector String —

    Selector String specifies a selector string comprising of the signal name, result name, segment number, chain number, and stream number. If you do not specify the signal name, the default signal instance is used. The default value is "segment0/chain0/stream0".

    Example:

    "segment0/chain0/stream0"

    "signal::sig1/segment0/chain0/stream0"

    "signal::sig1/result::r1/segment0/chain0/stream0"

    "result::r1/segment0/chain0/stream0"

    You can use the RFmxWLAN Build Stream 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 Channel Frequency Response Mean Magnitude (dB) —

    Channel Frequency Response Mean Magnitude returns the channel frequency response magnitude trace.

  • idbl.png x0 —

    x0 returns the starting subcarrier index.

  • idbl.png dx —

    dx returns the subcarrier increment value. This value is always 1.

  • i1dsgl.png y —

    y returns an array of magnitudes of the channel frequency response for each subcarrier. This value is expressed in dB.

  • icclst.png Channel Frequency Response Mean Phase (deg) —

    Channel Frequency Response Mean Phase returns the channel frequency response phase trace, which is the deviation of the measured phase response of the channel from the ideal linear phase response.

  • idbl.png x0 —

    x0 returns the starting subcarrier index.

  • idbl.png dx —

    dx returns the subcarrier increment value. This value is always 1.

  • i1dsgl.png y —

    y returns an array of deviation of the measured phase-response of the channel from the ideal linear phase response for all subcarriers. This value is expressed in degrees.

  • ierrcodeclst.png error out —

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