National Instruments DAQ X Series User Manual page 82

Chapter 4 Analog Input
Using a Digital Source
To use AI Start Trigger with a digital source, specify a source and an edge.
The source can be any of the following signals:
•
•
•
•
•
•
•
•
•
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 for more information.
You also can specify whether the measurement acquisition begins on the
rising edge or falling edge of AI Start Trigger.
Using an Analog Source
When you use an analog trigger source, the acquisition begins on the
first rising edge of the Analog Comparison Event signal.
Routing AI Start Trigger to an Output Terminal
You can route AI Start Trigger out to any PFI <0..15>, RTSI <0..7>, or
PXIe-DSTARC terminal. The output is an active high pulse. All PFI
terminals are configured as inputs by default.
The device also uses AI Start Trigger to initiate pretriggered DAQ
operations. In most pretriggered applications, a software trigger generates
AI Start Trigger. Refer to the
complete description of the use of AI Start Trigger and AI Reference
Trigger in a pretriggered DAQ operation.
X Series User Manual
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
PFI <0..15>
RTSI <0..7>
Counter n Internal Output
PXI_STAR
PXIe-DSTAR<A,B>
Change Detection Event
AO Start Trigger (ao/StartTrigger)
DI Start Trigger (di/StartTrigger)
DO Start Trigger (do/StartTrigger)
AI Reference Trigger Signal
4-36
section for a
ni.com