Hi brumby,
Behind the scenes, DAQmx actually uses two counters to implement a finite (N_Samples > 1) pulse generation on the 6602. The paired counter (ctr0 is paired with ctr1, ctr 2 with ctr 3, etc.) generates a gating signal while the specified counter generates the pulse train. To do the same thing in Traditional DAQ would also require the use of two counters. Whether or not the task is retriggerable should not make a difference. Generating a single pulse (or a continuous pulse train) does not require the use of the gating signal and so would only use a single counter.
It's probably worth mentioning that an exception is the newer X Series DAQ devices which don't require the use of two counters for Finite Pulse Generation (they use a paired internal counter which is not visible to the user to generate the gate signal).
Best Regards,
John Passiak
