Configures the device to wait for the complex power of the I/Q data to cross the specified threshold to mark a reference point within the record.

To trigger on burst signals, add a minimum quiet time (specified by the Minimum Quiet Time property) to ensure the trigger does not occur in the middle of a burst if the acquisition starts while a burst is generating. The quiet time should be set to a value smaller than the time between bursts, but large enough to ignore power changes within a burst.

You can use this trigger with the NI-TClk API.

Supported Devices: PXIe-5644/5645/5646, PXI-5661, PXIe-5663/5663E/5665/5667/5668, PXIe-5820/5830/5831/5832/5840/5841/5842/5860


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Inputs/Outputs

  • ci64.png pretrigger samples —

    pretrigger samples specifies the number of samples to store for each record that was acquired in the time period immediately before the trigger occurred. The default value is 0.

  • 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.

  • cstr.png source —

    source specifies the source of the RF signal for the power edge Reference Trigger. The only supported value is 0.

  • ci32.png slope —

    slope specifies whether the device detects a positive or negative slope on the trigger signal. The default value is Rising Slope.

    Rising Slope (1000)

    NI-RFSA detects a rising edge (positive slope).
    Falling Slope (1001)

    NI-RFSA detects a falling edge (negative slope).
  • cdbl.png level —

    level specifies the threshold, in dBm, above or below which the device triggers.

  • 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.

  • ierrcodeclst.png error out —

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