44
Operation Theory
Figure 4-15: Post-Trigger with Retrigger Generation
NOTE
Start Trigger signals asserted during the waveform gen-
eration process will be ignored.
Iterative Waveform Generation
You can set the IC_counter to generate iterative waveforms
regardless of the trigger mode used. The IC_counter stores the
iteration number. Examples are shown in Figure 4-16 and
Figure 4-17.
NOTE
When IC_counter is disabled, the waveform generation
will not stop until a stop trigger is asserted.
An onboard data FIFO is used to buffer the waveform patterns
for waveform generation. If the size of a single waveform is
smaller than that of the FIFO, after initially loading the data
from the host computer’s memory, the data in FIFO will be
reused when a single waveform generation is completed and
will not occupy the PCI bandwidth afterwards.
However, if the size of a single waveform is larger than that of
the FIFO, it needs to be intermittently loaded from the host
computer’s memory via DMA, and will occupy the PCI
bandwidth.
Summary of Contents for NuDAQ PCI-9222
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