Counter Input >> General Properties >> More >> Advanced >> Prescaler

NI-DAQmx C Properties

Counter Input >> General Properties >> More >> Advanced >> Prescaler

Data Type: uInt32
Description: Specifies the divisor to apply to the signal you connect to the counter source terminal. Scaled data that you read takes this setting into account. You should use a prescaler only when you connect an external signal to the counter source terminal and when that signal has a higher frequency than the fastest onboard timebase. Setting this value disables duplicate count prevention unless you explicitly set Duplicate Count Prevention to TRUE.

You can get/set/reset this property using:
  DAQmxGetCIPrescaler
  DAQmxSetCIPrescaler
  DAQmxResetCIPrescaler