Chapter 3 Analog Output
E Series User Manual 3-6 ni.com
AO Start Trigger Signal
You can use the AO Start Trigger (ao/StartTrigger) signal to initiate a
waveform generation. If you do not use triggers, you begin a generation
with a software command.
Using a Digital Source
To use ao/StartTrigger, specify a source and an edge. The source can be an
external signal connected to any PFI or RTSI <0..6> pin. The source can
also be one of several internal signal on your DAQ device. Refer to Device
Routing in MAX in the NI-DAQmx Help or the LabVIEW 8.x Help for more
information.
Figure 3-2 shows the timing requirements of the ao/StartTrigger digital
source.
Figure 3-2. ao/StartTrigger Digital Source Timing Requirements
Using an Analog Source
When you use an analog trigger source, the waveform generation begins on
the first rising edge of the Analog Comparison Event signal. Refer to
Chapter 10,
Triggering, for more information on analog triggering.
Outputting the AO Start Trigger Signal
You can configure the PFI 6/AO START TRIG pin to output the
ao/StartTrigger signal. The output pin reflects the ao/StartTrigger signal
regardless of what signal you specify as its source.
Rising-Edge
Polarity
Falling-Edge
Polarity
t
w
t
w
= 10 ns minimum
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