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11-3
This behavior places some restrictions on using AI channels as trigger sources. When you use
an analog start trigger, the trigger channel must be the first channel in the channel list. When you
use an analog reference or pause trigger, and the analog channel is the source of the trigger, there
can be only one channel in the channel list.
Analog Trigger Actions
The output of the analog trigger detection circuit is the Analog Comparison Event signal. You
can program your DAQ device to perform an action in response to the Analog Comparison Event
signal. The action can affect the following:
•
Analog input acquisition
•
Analog output generation
•
Counter behavior
Routing Analog Comparison Event to an Output
Terminal
You can route Analog Comparison Event out to any PFI <0..15> or RTSI <0..7> terminal.
Analog Trigger Types
Configure the analog trigger circuitry to different triggering modes:
•
Analog Edge Triggering
—Configure the analog trigger circuitry to detect when the
analog signal is below or above a level you specify.
In below-level analog triggering mode, shown in Figure 11-3, the trigger is generated when
the signal value is less than Level.
Figure 11-3.
Below-Level Analog Triggering Mode
Level
An
a
log Comp
a
ri
s
on Event
Summary of Contents for PCI-6281
Page 1: ...PCI 6281...
