Ai Pause Trigger Signal - National Instruments DAQ X Series User Manual

Routing AI Reference Trigger Signal to an Output Terminal
You can route AI Reference Trigger out to any PFI <0..15>, RTSI <0..7>,
PXI_Trig <0..7>, or PXIe-DSTARC terminal.
All PFI terminals are configured as inputs by default.

AI Pause Trigger Signal

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, as
shown in Figure 4-33. In the figure, T represents the period, and A
represents the unknown time between the clock pulse and the posttrigger.
AI Sample Clock
AI Pause Trigger
Halt. Used on Internal Clock
AI External Sample Clock
AI Sample Clock
AI Pause Trigger
Free Running. Used on External Clock
Using a Digital Source
To use AI Pause Trigger, specify a source and a polarity. The source can be
any of the following signals:
•
•
•
•
•
© National Instruments
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
A
T
Figure 4-33. Halt (Internal Clock) and Free Running (External Clock)
PFI <0..15>
RTSI <0..7>
PXI_STAR
PXIe-DSTAR<A,B>
Counter n Internal Output
4-61
Chapter 4 Analog Input
T – A
X Series User Manual