How do I trigger the GPCTR when using the ND_PULSE_TRAIN_GNR application?

[roz]

Hardware: PCI-6711 Software: Visual Basic
I am using the GPCTR1 as the timer source for waveform generation so that I can change the output frequency on the fly. I am using the ND_PULSE_TRAIN_GNR application and I want to be able to start and stop generation with an external trigger. Should I do this by calling GPCTR_Change_Parameter:ND_START_TRIGGER? Which channel would this use as the arming pin?

[Spencer S.]

Roz,

The counters on the PCI-6711 are provided by the DAQ-STC. Unfortunately, these counters don't support a start trigger. Only the NI-TIO, available on NI 660x devices, supports a start trigger. However, the analog output channels support triggering. You may want to consider using the triggering capabilities of the analog output channels. Another option is to gate the counter generating the pulse train. You can use a gate signal to allow generation when it is high (or low) and not allow generation when it is low (or high).

Good luck with your application.

Spencer S.