National Instruments Data Acquisition Device E Series - Manual (Page 130)

© National Instruments Corporation 10-1 E Series User Manual
10
Triggering
A trigger is a signal that causes a device to perform an action, such as
starting an acquisition. You can program your DAQ device to generate
triggers on the following:
• A software command
• A condition on an external digital signal
• A condition on an external analog signal
You can also program your DAQ device to perform an action in response to
a trigger. This action can affect the following:
• Analog input acquisitions
• Analog output generation
• Counter behavior
Note Not all E Series devices support analog triggering. Refer to Appendix A,
Device-Specific Information , for information about the triggering capabilities of your
device.
Triggering with a Digital Source
Your DAQ device can generate a trigger on a digital signal. You must
specify a source and an edge. The digital source can be any of the PFI or
RTSI <0..6> signals.
The edge can be either the rising edge or falling edge of the digital signal.
A rising edge is a transition from a low logic level to a high logic level.
A falling edge is a high-to-low transition.