Chapter 6 Digital I/O
X Series User Manual 6-20 ni.com
Using a Digital Source
To use DO Start Trigger, specify a source and an edge. The source can be
one of the following signals:
•A pulse initiated by host software
• PFI <0..15>
•RTSI<0..7>
• AI Reference Trigger (ai/ReferenceTrigger)
• AI Start Trigger (ai/StartTrigger)
• AO Start Trigger (ao/StartTrigger)
•Counter n Internal Output
• DI Start Trigger (di/StartTrigger)
• DI Reference Trigger (di/ReferenceTrigger)
• Change Detection Event
•PXI_STAR
The source also can be one of several 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 waveform generation begins on the rising
edge or falling edge of DO Start Trigger.
Using an Analog Source
When you use an analog trigger source, the waveform generation begins on
the first rising or falling edge of the Analog Comparison Event signal.
Refer to the Triggering with an Analog Source section of Chapter 11,
Triggering, for more information.
Routing DO Start Trigger Signal to an Output
Terminal
You can route DO Start Trigger out to any PFI <0..15>, RTSI <0..7>, or
PXIe-DSTARC terminal.
The output is an active high pulse. PFI terminals are configured as inputs
by default.
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