NI WLS/ENET-9163 Carrier User Guide and Specifications
20
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When the reference trigger occurs, the NI WLS/NET-9163 Series device
continues to write samples to the buffer until the buffer contains the number
of posttrigger samples desired. Figure 10 shows the final buffer.
Figure 10.
Reference Trigger Final Buffer
Using a Digital Source
To use ai/ReferenceTrigger with a digital source, specify a source and an
edge. PFI 0 can provide the source. Refer to the
Device Routing in MAX
topic in the
NI-DAQmx Help
or the
LabVIEW Help
in version 8.0 or later
for more information.
The
NI-DAQmx Help
is available after installation from
Start»Programs»
National Instruments»NI-DAQ»NI-DAQmx Help
. To view the
LabVIEW Help,
in version 8.0 or later, select
Help»Search the LabVIEW
Help
in LabVIEW. Alternately, to download the
LabVIEW Help,
go to
ni.com/manuals
.
You also can specify whether the measurement acquisition stops on the
rising edge or falling edge of ai/ReferenceTrigger.
AI Pause Trigger Signal
The Pause Trigger signal can be generated from external sources. Any time
the signal deasserts, you can use the Pause Trigger signal to pause the
acquisition.
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/PauseTrigger, specify a source and a polarity on PFI 0.
Reference Trigger
Pretrigger Samples
Complete Buffer
Posttrigger Samples
