You can use the Pause Trigger to pause and resume a measurement acquisition. The internal sample clock pauses while the external trigger signal is active and resumes when the signal is inactive. You can program the active level of the pause trigger to be high or low.
To use the Pause Trigger, specify a source and a polarity. The source can be either from PFI or one of several other internal signals on your cRIO controller. Refer to the Device Routing in MAX topic in the NI-DAQmx Help or the LabVIEW Help for more information.
Some C Series modules can generate a trigger based on an analog signal. In NI-DAQmx, this is called the Analog Comparison Event.
When you use an analog trigger source, the internal sample clock pauses when the Analog Comparison Event signal is low and resumes when the signal goes high (or vice versa).