Analog Input Triggering - National Instruments X Series User Manual

Chapter 4 Analog Input
– Hardware-timed single point (HWTSP)—Typically, HWTSP operations are used to
read single samples at known time intervals. While buffered operations are optimized
for high throughput, HWTSP operations are optimized for low latency and low jitter.
In addition, HWTSP can notify software if it falls behind hardware. These features
make HWTSP ideal for real time control applications. HWTSP operations, in
conjunction with the wait for next sample clock function, provide tight
synchronization between the software layer and the hardware layer. Refer to the
NI-DAQmx Hardware-Timed Single Point Lateness Checking document for more
information. To access this document, go to
daqhwtsp
Note ( NI USB-635
PXIe-6386/6396 devices do not support hardware-timed single point (HWTSP)
operations. For more information about special considerations for PXIe-6386 and
PXIe-6396 devices, go to

Analog Input Triggering

Analog input supports three different triggering actions:
• Start trigger
• Reference trigger
• Pause trigger
AI tasks will not support pause triggering on these devices.
Note ( NI PXIe-6386/6396 Devices)
PXIe-6386 and PXIe-6396 devices. For more information about special
considerations for these devices, go to
smio14ms
Refer to the AI Start Trigger
sections for information about these triggers.
An analog or digital trigger can initiate these actions. All Simultaneous MIO X Series devices
support digital triggering, but some do not support analog triggering. To find your device
triggering options, refer to the device specifications.
4-40 | ni.com
.
x x
/636 and NI PXIe-6386/6396 Devices)
ni.com/info
.
Signal, AI Reference Trigger
ni.com/info
and enter the Info Code
AI tasks do not support pause triggering on
and enter the Info Code
ni.com/info
Signal, and
and enter the Info Code
X Series USB and
.
smio14ms
AI Pause Trigger Signal