NI-DAQ™mx C Reference

Start >> Analog Edge >> Digital Filter >> Enable

Data Type: bool32
Description: Specifies whether to apply a digital filter to the digital output of the analog triggering circuitry (the Analog Comparison Event). When enabled, the analog signal must stay above or below the trigger level for the minimum pulse width before being recognized. Use filtering for noisy trigger signals that transition in and out of the hysteresis window rapidly.

You can get/set/reset this property using:
  DAQmxGetAnlgEdgeStartTrigDigFltrEnable
  DAQmxSetAnlgEdgeStartTrigDigFltrEnable
  DAQmxResetAnlgEdgeStartTrigDigFltrEnable

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