National Instruments NI 6221 User Manual

Chapter 4 Analog Input
© National Instruments Corporation 4-39 M Series User Manual
AI Pause Trigger Signal
You can use the AI Pause Trigger (ai/PauseTrigger) signal 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.
Using a Digital Source
To use ai/SampleClock, specify a source and a polarity. The source can be
any of the following signals:
• PFI <0..15>
•RTSI <0..7>
•PXI_STAR
The source also can be one of several other internal signals on your DAQ
device. Refer to Device Routing in MAX in the NI-DAQmx Help or the
LabVIEW Help in version 8.0 or later for more information.
Using an Analog Source
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).
Routing AI Pause Trigger Signal to an Output
Terminal
You can route ai/PauseTrigger out to RTSI <0..7>.
Note Pause triggers are only sensitive to the level of the source, not the edge.

National Instruments NI 6221 Specifications

General

Brand	National Instruments
Model	NI 6221
Category	Media Converter
Language	English