Apfi <0,1> Terminals; Analog Input Channels - National Instruments DAQ X Series User Manual

Figure 11-3 shows the analog trigger circuit on Simultaneous MIO
X Series devices.
+
NI-PGIA
–
Analog
Input
Channels
+
NI-PGIA
–
APFI <0..1>
You must specify a source and an analog trigger type. The source can be
either an APFI <0,1> terminal or an analog input channel.
APFI <0,1> Terminals
When you use either APFI <0,1> terminal as an analog trigger, you
should drive the terminal with a low impedance signal source (less than
1 kΩ source impedance). If APFI <0,1> are left unconnected, they are
susceptible to crosstalk from adjacent terminals, which can cause false
triggering. Note that the APFI <0,1> terminals also can be used for other
functions such as the AO External Reference input, as described in the
AO Reference Selection

Analog Input Channels

Refer to the
Input Channels on Simultaneous MIO X Series Devices
on your device.
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ADC
Analog
Mux
Trigger
Detection
ADC
Figure 11-3. Simultaneous MIO X Series Device Analog Trigger Circuitry
section of Chapter 5,
Analog Input Channels on MIO X Series Devices
11-3
Chapter 11
AI Circuitry
Analog Comparison
Event AO Circuitry
(Analog Trigger
DIO Circuitry
Circuitry Output)
Counter Circuitry
Analog Output.
or
section, depending
X Series User Manual
Triggering
Analog