Configure counter input (CI) channel properties to measure the frequency of a digital signal.

VeriStand measures the frequency of a digital signal by counting observed edges and performing a software calculation over a period of time determined by your expected frequency range.
Note This method uses a software calculation that may not provide the most reliable accuracy or update rate. Alternatively, if your DAQ card supports Pulse Measurement, use values from the Frequency channel located under the counter channels in System Explorer.
Property/Section Description
Minimum Value The minimum value you expect to measure before VeriStand performs any scaling or calibration.
Note The minimum value of frequency determines, and is equal to, the measurement frequency resolution. The measurement time is equal to the reciprocal of the minimum frequency value.
Maximum Value The maximum value you expect to measure before VeriStand performs any scaling or calibration.
Count Edge Specifies on which edges of the input signal to increment or decrement the count:
  • Falling—Count falling edges.
  • Rising—Count rising edges.
Note For device specific information about the default terminals used for counter measurements and generations, refer to Connecting Counter Signals.