Triggering With An Analog Source - National Instruments PXI-6070E User Manual

Chapter 10 Triggering

Triggering with an Analog Source

Analog
Input
Channels
START TRIG
E Series User Manual
Figure 10-1 shows a falling-edge trigger.
You can also program your DAQ device to perform an action in response to
a trigger from a digital source. This action can affect the following:
• Analog input acquisitions
• Analog output generation
• Counter behavior
Some E Series devices can generate a trigger on an analog signal.
Figure 10-2 shows the analog trigger circuit.
+
PGIA
ADC
–
Mux
PFI 0/AI
You must specify a source and an analog trigger type. The source can be
either the PFI 0/AI START TRIG pin or an analog input channel. Refer to
the Analog Trigger Types
5 V
Digital Trigger
Falling edge initiates acquisition
Figure 10-1. Falling-Edge Trigger
Analog Comparison
Analog
Event
Trigger
(Analog Trigger
Detection
Circuitry Output)
Figure 10-2. Analog Trigger Circuit
section for more information.
10-2
0 V
AI Circuitry
AO Circuitry
Counter Circuitry
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