Figure 36. Reference Trigger Final Buffer
Reference Trigger
Pretrigger Samples
Complete Buffer
Posttrigger Samples
Using a Digital Source
To use a reference trigger with a digital source, specify a source and a rising or falling edge.
Either PFI or one of several internal signals on the cRIO controller can provide the source.
Refer to the "Device Routing in MAX" topic in the
NI-DAQmx Help
or the
LabVIEW Help
for
more information.
Using an Analog Source
Some C Series modules can generate a trigger based on an analog signal. In NI-DAQmx, this
is called the Analog Comparison Event.
When you use an analog trigger source, the acquisition stops on the first rising or falling edge
of the Analog Comparison Event signal, depending on the trigger properties.
Routing the Reference Trigger Signal to an Output Terminal
You can route a reference trigger to any output PFI terminal. Reference Trigger is active high
by default.
AI Pause Trigger Signal
You can use the Pause Trigger 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 the Pause Trigger, specify a source and a polarity. The source can be either from PFI or
one of several other internal signals on your cRIO controller. Refer to the "Device Routing in
MAX" topic in the
NI-DAQmx Help
or the
LabVIEW Help
for more information.
Using an Analog Source
Some C Series modules can generate a trigger based on an analog signal. In NI-DAQmx, this
is called the Analog Comparison Event.
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NI cRIO-905x User Manual