National Instruments Network Device DAQ S - Manual (Page 135)

Chapter 11 Triggering
© National Instruments Corporation 11-3 NI 6124/6154 User Manual
Analog Input Channel
(NI 6124 Only) You can select any analog input channel to drive the
instrumentation amplifier. The instrumentation amplifier amplifies the
signal as determined by the input mode and the input polarity and range.
The output of the instrumentation amplifier then drives the analog trigger
detection circuit. By using the instrumentation amplifier, you can trigger on
very small voltage changes in the input signal. For more information, refer
to the
Analog Trigger Accuracy section.
Analog Trigger Actions
(NI 6124 Only) 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 acquisitions
• Analog output generation
• Counter behavior
Note Refer to Timing and Triggering in the NI-DAQmx Help or the LabVIEW Help in
version 8.0 or later for more information.
Note (NI 6154 Only) The NI 6154 does not support hardware analog triggering.
Analog Trigger Types
(NI 6124 Only) 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.