National Instruments PCI-6281, Руководство пользователя

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Chapter 5 Analog Output
Analog Output Timing Signals
Figure 5-3 summarizes all of the timing options provided by the analog output timing engine.
Figure 5-3. Analog Output Timing Options
M Series devices feature the following AO (waveform generation) timing signals:
•
AO Start Trigger Signal
•
AO Pause Trigger Signal
•
AO Sample Clock Signal
•
AO Sample Clock Timebase Signal
AO Start Trigger Signal
Use the AO Start Trigger (ao/StartTrigger) signal to initiate a waveform generation. If you do
not use triggers, you can begin a generation with a software command.
Using a Digital Source
To use AO Start Trigger, specify a source and an edge. The source can be one of the following
signals:
• A pulse initiated by host software
• PFI <0..15>
• RTSI <0..7>
• AI Reference Trigger (ai/ReferenceTrigger)
• AI Start Trigger (ai/StartTrigger)
• PXI_STAR
The source also can be one of several internal signals on your DAQ device. Refer to
Device
Routing in MAX
in the
NI-DAQmx Help
or the
LabVIEW Help
for more information.
PFI, RT S I
PXI_ S TAR
An a log Comp a ri s on
Event
20 MHz Time bas e
100 kHz Time bas e
PXI_CLK10
Progr a mm ab le
Clock
Divider
AO Sa mple Clock
Time bas e
PFI, RT S I
PXI_ S TAR
An a log Comp a ri s on Event
Ctr n Intern a l O u tp u t
AO Sa mple Clock