Chapter 2
NI 5450 Overview
NI PXIe-5450 User Manual
2-76
ni.com
Single Trigger Mode
When your application is configured for Single trigger mode, only one Start
trigger is required to begin waveform generation. All Start triggers after the
first Start trigger are ignored. Once the waveform generation is complete,
the analog output indefinitely settles at the DC value of the last sample in
the waveform. The following table provides more information about
waveform generation behavior in Arbitrary Waveform and Arbitrary
Sequence output modes.
Output Mode
Trigger Behavior
Arbitrary Waveform Mode
The waveform you downloaded generates only once and waveform
generation halts, unless the Arbitrary Waveform Repeat Count
property or the
NIFGEN_ATTR_ARB_REPEAT_COUNT
attribute is set,
in which case the waveform generates the specified number of times.
Arbitrary Sequence Mode
The waveform pattern you define in the sequence list generates only
once. When a Start trigger is received, generation begins at the first
segment and continues through the last segment, after which the
waveform generation halts. You can determine the DC value at
which waveform generation ends by configuring the last point in the
final segment as the desired DC value, or you can add an extra
segment filled with the same DC value.
S
t
a
rt
Trigger
L
as
t
Sa
mple
Gener
a
ted Contin
u
o
us
ly
End of
W
a
veform
S
t
a
rt
Trigger
L
as
t
Sa
mple of L
as
t
S
egment
Gener
a
ted Contin
u
o
us
ly
End of
All
S
egment
s
