Returns the requested response type, based on current NI-RFSA settings. The PXI-5661 and PXIe-5663/5663E/5665/5667/5668 automatically corrects the IF and RF response when you set the Digital IF Equalization Enabled property to TRUE. If you are using external digitizer mode, you can use information returned from this VI to correct your measurement.

Refer to the Factory Calibration topic for your device for more information about frequency-response calibration.

Supported Devices: PXI-5600, PXIe-5601/5603/5605/5606 (external digitizer mode), PXI-5661, PXIe-5663/5663E/5665/5667/5668, PXIe-5693/5694/5698


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Inputs/Outputs

  • civrn.png instrument handle —

    instrument handle identifies your instrument session. instrument handle is obtained from the niRFSA Initialize VI or the niRFSA Initialize With Options VI.

  • ci32.png response type —

    response type specifies the IF, RF, or combined (IF and RF) response of the downconverter or NI-RFSA device that NI-RFSA returns. The default value is Downconverter IF Response.

    Downconverter IF Response Returns the IF response of the downconverter.
    Downconverter RF Response Returns the RF response of the downconverter. This value is supported for only the PXIe-5603/5605/5606/5665/5667/5668/5693.
    Downconverter Combined Response Returns the combined RF and IF response of the downconverter. The combined response is in terms of IF frequency. This value is supported for only the PXIe-5603/5605/5606/5665/5667/5668.
    VSA IF Response Returns the IF response of the entire NI-RFSA device. This value is supported for only the PXIe-5665/5667/5668.
    VSA Combined Response Returns the combined IF and RF response of the entire NI-RFSA device. The combined response is in terms of IF frequency. This value is supported for only the PXIe-5665/5667/5668.
  • cerrcodeclst.png error in —

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

  • iivrn.png instrument handle out —

    instrument handle out passes a reference to your instrument session to the next VI. instrument handle is obtained from the niRFSA Initialize VI or the niRFSA Initialize With Options VI and identifies a particular instrument session.

  • i1ddbl.png frequencies —

    frequencies returns an array containing the frequencies, in hertz (Hz), that correspond to the response data.

  • i1ddbl.png magnitude response —

    magnitude response returns an array containing the magnitude response, in decibels (dB). The magnitude response is normalized to the center frequency at each frequency in the frequencies array.

  • i1ddbl.png phase response —

    phase response returns an array containing the phase response, in radians. The phase response is normalized to the center frequency at each frequency entry in the frequencies array.

    This array may contain zeros if the device does not contain a stored phase response in its calibration data.

  • ierrcodeclst.png error out —

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