National Instruments PCI-6281 User Manual

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Chapter 4 Analog Input
Using a Digital Source
To use AI Pause Trigger, specify a source and a polarity. The source can be any of the following
signals:
• PFI <0..15>
•RTSI <0..7>
• PXI_STAR
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.
Using an Analog Source
When you use an analog trigger source, the internal sample clock pauses when the Analog
Comparison Event signal is low and resumes when the signal goes high (or vice versa).
Routing AI Pause Trigger Signal to an Output Terminal
You can route AI Pause Trigger out to RTSI <0..7>.
Note Pause triggers are only sensitive to the level of the source, not the edge.
Getting Started with AI Applications in Software
You can use the M Series device in the following analog input applications:
• Single-point analog input
• Finite analog input
• Continuous analog input
You can perform these applications through DMA, interrupt, or programmed I/O data transfer
mechanisms. Some of the applications also use start, reference, and pause triggers.
Note For more information about programming analog input applications and
triggers in software, refer to the NI-DAQmx Help or the LabVIEW Help.

National Instruments PCI-6281 Specifications

General

Brand	National Instruments
Model	PCI-6281
Category	Data Loggers
Language	English