ThaRev

Capturing one large chunk of samples directly to DDR is largely what I'd like to do. Previously, repeated mode has worked fine but I can't find any information on record mode in the Waveforms documentation to understand exactly how it works. I assume that if data is transferred in chunks then it's closer to a streaming architecture and there is potential for missed samples between chunks at high sample rates. The use case that repeated mode has worked well for in the past is dynamically scrubbing the timeline to set a trigger offset. Previously, if I identified a significant event that occurred say, 1.5 seconds after a trigger event, I could scrub to that position in the timeline, zoom in, set the acquisition rate and buffer size as appropriate, and re-run the acquisition to get a better look at the data. It seems that in record mode the trigger delay can only be set in a separate window as a %-age of the acquisition buffer size, which is much less convenient than in repeated mode.

Beginning with Waveforms v3.8.2, the maximum sample buffer size with the Digital Discovery for any mode other than record mode is 100k. Previously up to 134M samples were available in all acquisition modes. What happened?