Configures the degree of the polynomial and the approximation method used for polynomial approximation of the AM-to-AM response of the device under test (DUT) when you set the DPD Model property to Lookup Table.


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Inputs/Outputs

  • cstr.png Selector String —

    Selector String specifies a selector string comprising of the signal name. If you do not specify the signal name, the default signal instance is used. The default value is "" (empty string).

    Example:

    ""

    "signal::sig1"

    You can use the RFmxSpecAn 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.

  • ci32.png AM to AM Curve Fit Order —

    AM to AM Curve Fit Order specifies the degree of the polynomial used to approximate the AM-to-AM characteristic of the DUT when you set the DPD Model property to Lookup Table. The default value is 7.

  • ci32.png AM to AM Curve Fit Type —

    AM to AM Curve Fit Type specifies the polynomial approximation cost-function of the DUT AM-to-AM characteristic when you set the DPD Model property to Lookup Table. The default value is Least Absolute Residual.

    Least Square (0)

    Minimizes the energy of the polynomial approximation error.
    Least Absolute Residual (1)

    Minimizes the magnitude of the polynomial approximation error.
    Bisquare (2)

    Excludes the effect of data outliers while minimizing the energy of the polynomial approximation error.
  • 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.

  • ierrcodeclst.png error out —

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