Counter Input >> Timestamp >> GPS >> Synchronization Source

NI-DAQmx C Properties

Counter Input >> Timestamp >> GPS >> Synchronization Source

Data Type: char*
Description: Specifies the terminal to which the GPS synchronization signal is connected.

You can get/set/reset this property using:
  DAQmxGetCIGPSSyncSrc
  DAQmxSetCIGPSSyncSrc
  DAQmxResetCIGPSSyncSrc