© National Instruments
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2-13
Figure 2-8.
DO Sample Clock and DO Start Trigger
DO Sample Clock Timebase Signal
The DO Sample Clock Timebase (do/SampleClockTimebase) signal is divided down to provide
a source for DO Sample Clock. By default, the NI 6614 routes the onboard 100 MHz timebase
to the DO Sample Clock Timebase. You can route many signals to DO Sample Clock Timebase.
To view the complete list of possible routes, see the
Device Routes
tab in MAX. Refer to
Device
Routing in MAX
in the
NI-DAQmx Help
or the
LabVIEW Help
for more information.
DO Sample Clock Timebase is not available as an output on the I/O connector.
You might use DO Sample Clock Timebase 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 DO Sample Clock rather than DO Sample
Clock Timebase.
DO Start Trigger Signal
Use the DO Start Trigger (do/StartTrigger) signal to initiate a waveform generation. If you do
not use triggers, you can begin a generation with a software command.
Retriggerable DO
The DO Start Trigger can also be configured to be retriggerable. The timing engine will generate
the sample clocks for the configured generation in response to each pulse on a DO Start Trigger
signal.
DO
Sa
mple Clock Time
bas
e
DO
S
t
a
rt Trigger
DO
Sa
mple Clock
Del
a
y
From
S
t
a
rt
Trigger
