NI-DAQ™mx C Reference

Counter Output >> Pulse >> Frequency >> Duty Cycle

Data Type: float64
Description: Specifies the duty cycle of the pulses. The duty cycle of a signal is the width of the pulse divided by period. NI-DAQmx uses this ratio and the pulse frequency to determine the width of the pulses and the delay between pulses.

You can get/set/reset this property using:
  DAQmxGetCOPulseDutyCyc
  DAQmxSetCOPulseDutyCyc
  DAQmxResetCOPulseDutyCyc

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