Counter Input >> Frequency >> Measurement Specifications >> Method

NI-DAQmx C Reference Help

Edition Date: January 2019

Part Number: 370471AM-01

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Data Type: int32
Description: Specifies the method to use to measure the frequency of the signal.


Valid values

DAQmx_Val_LowFreq1Ctr 10105 Use one counter that uses a constant timebase to measure the input signal.
DAQmx_Val_HighFreq2Ctr 10157 Use two counters, one of which counts pulses of the signal to measure during the specified measurement time.
DAQmx_Val_LargeRng2Ctr 10205 Use one counter to divide the frequency of the input signal to create a lower-frequency signal that the second counter can more easily measure.
DAQmx_Val_DynAvg 16065 Uses one counter and automatically configures the counter settings based on the range of frequencies to be measured. During the acquisition, the counter dynamically adjusts the number of periods that are averaged to balance measurement accuracy and latency.



You can get/set/reset this property using:

  DAQmxGetCIFreqMeasMeth

  DAQmxSetCIFreqMeasMeth

  DAQmxResetCIFreqMeasMeth

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