Chapter 7
Counters
©
National Instruments
7-31
X Series User Manual
Single Pulse Generation with Start Trigger
The co
u
nter can o
u
tp
u
t a single p
u
lse in response to one p
u
lse on a
hardware Start Trigger signal. The p
u
lse appears on the Co
u
nter
n
Internal
O
u
tp
u
t signal of the co
u
nter.
Yo
u
can ro
u
te the Start Trigger signal to the Gate inp
u
t of the co
u
nter. Yo
u
can specify a delay from the Start Trigger to the beginning of the p
u
lse. Yo
u
also can specify the p
u
lse width. The delay and p
u
lse width are meas
u
red
in terms of a n
u
mber of active edges of the So
u
rce inp
u
t.
After the Start Trigger signal p
u
lses once, the co
u
nter ignores the Gate
inp
u
t.
Fig
u
re 7-28 shows a generation of a p
u
lse with a p
u
lse delay of fo
u
r and a
p
u
lse width of three (
u
sing the rising edge of So
u
rce).
Figure 7-28.
Single Pulse Generation with Start Trigger
Pulse Train Generation
Refer to the following sections for more information abo
u
t the X Series
p
u
lse train generation options:
•
Finite Pulse Train Generation
•
Retriggerable Pulse or Pulse Train Generation
•
Continuous Pulse Train Generation
•
Finite Implicit Buffered Pulse Train Generation
•
Continuous Buffered Implicit Pulse Train Generation
•
Finite Buffered Sample Clocked Pulse Train Generation
•
Continuous Buffered Sample Clocked Pulse Train Generation
S
OURCE
GATE
(
S
t
a
rt Trigger)
OUT
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