Performs the enabled measurements on the spectrum waveform that you specify in Spectrum parameter. Call this VI after you configure the signal and measurement properties. You can fetch measurement results using the Fetch VIs or result properties in the property node. Use this VI only if the Recommended Acquisition Type property value is either Spectral or IQ or Spectral.

When using the Analysis-Only mode in RFmxLTE, RFmx ignores RFmx hardware settings such as reference level and attenuation. The only RF hardware settings that are not ignored are the center frequency and trigger type, since it is needed for spectral measurement traces as well as some measurements such as ModAcc, ACP, and SEM.

Note Query the Recommended Acquisition Type property from the RFmxInstr Property Node after calling the RFmx LTE Commit VI.


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Inputs/Outputs

  • cstr.png Result Name —

    Result Name specifies the name to be associated with measurement results. Provide a unique name, such as "r1" to enable fetching of multiple measurement results and traces. This input accepts the result name with or without the "result::" prefix. The default value is "" (empty string) which refers to default result instance.

    Example:

    "result::r1"

    "r1"

  • cstr.png Selector String —

    Selector String specifies a selector string comprising of the signal name and result name. The result name can either be specified through this input or the Result Name parameter. If you do not specify the signal name, the default signal instance is used. If you do not specify the result name in this input, either the result name specified by Result Name parameter or the default result instance is used. The default is "" (empty string).

    Example:

    "signal::sig1"

    "result::r1"

    "signal::sig1/result::r1"

    You can use the RFmxLTE Build Signal 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 VI with option string as "AnalysisOnly=1".

  • ccclst.png Spectrum —

    Spectrum specifies the data for a spectrum waveform including the start, delta, and actual values.

  • cdbl.png x0 —

    x0 specifies the start frequency of the spectrum. This value is expressed in Hz.

  • cdbl.png dx —

    dx specifies the frequency interval between data points in the spectrum.

  • c1dsgl.png y —

    y contains the real-value power spectrum.

  • cbool.png Reset? —

    Reset? resets measurement averaging. If you enable averaging, set this parameter to TRUE for first record and FALSE for subsequent records.

  • 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 to your RFmx session to the next VI.

  • istr.png Selector String Out —

    Selector String Out returns the selector string that can be passed to the Selector String parameter of Configure, Initiate, and Fetch VIs.

  • ierrcodeclst.png error out —

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