National Instruments NI USB-621x User Manual

Chapter 7 Analog Output
© National Instruments Corporation 7-5 NI USB-621x User Manual
Analog Output Timing Signals
Figure 7-3 summarizes all of the timing options provided by the analog
output timing engine.
Figure 7-3. Analog Output Timing Options
USB 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/StartTrigger, specify a source and an edge. The source can be one
of the following signals:
•A software pulse
• PFI <0..3>, PFI <8..11>
• ai/StartTrigger
20 MHz Timebase
100 kHz Timebase
Programmable
Clock
Divider
ao/SampleClock
Timebase
Ctr
n Internal Output
ao/SampleClock
PFI
PFI
SampleClock
Timebase Divisor

National Instruments NI USB-621x Specifications

General

Brand	National Instruments
Model	NI USB-621x
Category	Computer Hardware
Language	English