10-21-2016 04:51 PM
I am generating voltage pulses with an SMU in a pxi chassis. The unit is a PXIe-4137, the chassis is a PXIe-1078. It seems like I cannot add a delay to a trigger for these pulses using DCPOWER itself. Am I missing something? I think I could kludge it by creating the delayed trigger with DAQmx and then exporting it back to DCPOWER, but that seems sloppy. I need, for example, to have a pulse start a few ms after a ~10 Hz trigger that starts a bunch of other things as well.
I guess I could also make a sequence that includes a zero pulse before the pulse I actually want, but that seems sloppy as well. It will also make it more difficult to change the delay, which is a tuning parameter.
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10-24-2016 10:29 AM
Hi Stephencox,
You aren’t missing anything, the DCPOWER driver doesn’t natively have a trigger delay like the one that’s built into the DAQmx driver. With that in mind, if you have a DAQ card in your chassis, you may be able to make use of a counter to send a delayed trigger to the PXIe-4137.
10-24-2016 03:44 PM
Ok, thanks. I have a DAQ card with four counters, but I am already using three of them and I am somewhat inclined to save the fourth. I think I will try the sequence approach.