LO export calibration measures the PXIe-5603/5605 LO output power level.

The LO output power measurements are taken from the PXIe-5653 module. In MIMO applications, when the LO is exported from one PXIe-5603/5605 module to another subsequent PXIe-5603/5605, an output power signal of approximately +7 dBm is expected on each LO connector (LO1, LO2, and LO3). This VI records the LO attenuation that results in an output power of +7 dBm (or greater) on the three LO output terminals.

Supported Devices: PXIe-5603/5605/5606


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Inputs/Outputs

  • ci32.png LO number —

    LO number specifies the LO source to use for the LO export calibration.

    LO1 Source (2200)

    Selects LO1, which is the 3.2 GHz to 8.3 GHz variable signal path.
    LO2 Source (2201)

    Selects LO2, which is the 4 GHz signal path.
    LO3 Source (2202)

    Selects LO3, which is the 800 MHz signal path.
  • civrn.png instrument handle —

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

  • c1ddbl.png frequencies —

    frequencies specifies frequencies for the LO output power measurement.

  • c1ddbl.png LO attenuations —

    LO attenuations specifies the attenuation values that result in a +7 dBm output signal on the corresponding LO output connector.

  • 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.

  • ierrcodeclst.png error out —

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

    • Details

    The PXIe-5665/5668 uses three LOs, but only LO1 is variable in frequency. This VI accepts an array of frequencies and attenuations; however, for LO2 and LO3, this array must have only one element because these two LO sources operate only at one frequency. LO1 can have multiple values for specific frequencies.