National Instruments Data Acquisition Device E Series - Manual (Page 93)

Chapter 3 Analog Output
© National Instruments Corporation 3-13 E Series User Manual
Figure 3-10 shows the relationship of the ao/SampleClock signal to the
ao/StartTrigger signal.
Figure 3-10. ao/SampleClock and ao/StartTrigger
AO Sample Clock Timebase Signal
You can select any PFI or RTSI pin as well as many other internal signals
as the AO Sample Clock Timebase (ao/SampleClockTimebase) signal.
This signal is not available as an output on the I/O connector. The
ao/SampleClockTimebase is divided down to provide the Onboard Clock
source for the ao/SampleClock. You specify whether the samples begin on
the rising or falling edge of ao/SampleClockTimebase.
You might use the ao/SampleClockTimebase signal if you want to use an
external sample clock signal, but need to divide the signal down. If you
want to use an external sample clock signal, but do not need to divide the
signal, then you should use the ao/SampleClock signal rather than the
ao/SampleClockTimebase. If you do not specify an external sample clock
timebase, NI-DAQ uses the Onboard Clock.
ao/StartTrigger
ao/SampleClock
ao/SampleClockTimebase
Delay
From
Start
Trigger