Figure 5-3. analog output timing options, Ao start trigger signal, Using a digital source – National Instruments Data Acquisition Device NI USB-621x User Manual
Page 76: Ao start trigger signal -5, Using a digital source -5, Re 5-3 s
Chapter 5
Analog Output
© National Instruments Corporation
5-5
Figure 5-3. Analog Output Timing Options
USB-621x devices feature the following AO (waveform generation) timing
signals:
•
AO Start Trigger 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
•
(USB-6211/6215 Devices)
PFI <0..3>
•
(USB-6212/6216 Devices)
PFI <0..15>
•
(USB-6218 Devices)
PFI <0..3>, PFI <8..11>
•
AI Start Trigger (ai/StartTrigger)
20 MHz Timebase
100 kHz Timebase
Programmable
Clock
Divider
AO Sample Clock
Timebase
Ctr n Internal Output
AO Sample Clock
PFI
PFI
Sample Clock
Timebase Divisor