ADLINK PXI-2502 - Manual (Page 40)

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• Operation Theoreym
(UC _Counter=8, IC_Counter=1)
8 update counts, 1 iteration
DAWR
WFG_in_progress
Operation start
Trigger
Output Waveform
Delay until
DLY1_counter
reaches 0
Figure 4.2.5 Delay-Trigger Generation
(UC _Counter=4, IC_Counter=2, Trig_Counter=3 ,
DLY2_Counter disabled, DLY2_Counter disabled )
4 update counts, 2 iterations
Ignored
DAWR
WFG_in_progress
Operation start
Trigger
Output Waveform
0
2
4
a single waveform
Figure 4.2.6 Post-Trigger with Retrigger Generation
4.2.2.3 Iterative Waveform Generation
Users can set IC_counter to generate iterative waveforms, no matter which
Trigger Mode is used. The IC_counter stores the iteration number. Ex-
amples are shown in Figure 4.2.7 and 4.2.8.
When IC_counter is disabled, the waveform generation will not stop until a
stop trigger is asserted. For Stop Mode, please refer to Section 4.2.2.4 for
details.
An on-board data FIFO is used to buffer the waveform patterns for wave-
form generation. If the size of a single waveform is smaller than that of the
FIFO, after initially loading the data from the host PC’s memory, the data in
FIFO will be re-used when a single waveform generation is completed. In
other words, it won’t occupy the PCI bandwidth afterwards. However, if the