02-26-2020 12:49 PM
Hello,
I'm trying to use a Triggered counter as a clock source for an analog voltage acquisition. I used the Multi-function-Ctr Retrig Pulse Train Generation for AI Sampleclock.vi as my template. It seems to be working, but in my acquired data it there is a voltage spike associated with each trigger event. If I wire up one of the NI-daq board digital I/O lines and use that as a trigger source I don't see the spikes.
My hardware is a PCI-6259
Some Application Background:
I have a device that is scanning a laser. I'm using it to trigger different hardware acquisitions at each scan point (It has multiple digital outputs for this).
04-13-2020 12:28 PM
Based on your description that the triggering using onboard digital pin doesn't cause the spike, there is a possible electrical connection issue for the external trigger. Could you please share the connection diagram of the external trigger and what are the signal specifications of the trigger?