Chapter 11
Triggering
©
National Instruments
11-3
X Series User Manual
Fig
u
re 11-3 shows the analog trigger circ
u
it on Sim
u
ltaneo
u
s MIO
X Series devices.
Figure 11-3.
Simultaneous MIO X Series Device Analog Trigger Circuitry
Yo
u
m
u
st specify a so
u
rce and an analog trigger type. The so
u
rce can be
either an APFI <0,1> terminal or an analog inp
u
t channel.
APFI <0,1> Terminals
When yo
u
u
se either APFI <0,1> terminal as an analog trigger, yo
u
sho
u
ld drive the terminal with a low impedance signal so
u
rce (less than
1 k
Ω
so
u
rce impedance). If APFI <0,1> are left
u
nconnected, they are
s
u
sceptible to crosstalk from adjacent terminals, which can ca
u
se false
triggering. Note that the APFI <0,1> terminals also can be
u
sed for other
f
u
nctions s
u
ch as the AO External Reference inp
u
t, as described in the
AO Reference Selection
section of Chapter 5,
Analog Output
.
Analog Input Channels
Refer to the
Analog Input Channels on MIO X Series Devices
or
Analog
Input Channels on Simultaneous MIO X Series Devices
section, depending
on yo
u
r device.
An
a
log
Inp
u
t
Ch
a
nnel
s
NI-PGIA
+
–
+
–
ADC
ADC
M
u
x
An
a
log
Trigger
Detection
An
a
log Comp
a
ri
s
on
Event
(An
a
log Trigger
Circ
u
itry O
u
tp
u
t)
APFI <0..1>
AO Circ
u
itry
Co
u
nter Circ
u
itry
DIO Circ
u
itry
AI Circ
u
itry
NI-PGIA
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
