Logic MSO just arrived today but not getting it to do what I need. I saw some of the prior questions in the forum that explain what I need - single shot with controlled capture length (pre and post trigger) from a digital input(s) is not available yet.
in which case this is sort of a me too post - though I’m trying to work around it by using the scope to trigger.
Hooked up one of the analog inputs to the same pin as the digital and planned to use that to trigger. (this is just a simple test case, IRL I would have more digital stuff).
When I enabled the scope channel the digital inputs disappeared from Device Settings. Quit the app and restarted and now I could enabled digital channels again. (bug?)
When the scope side triggers and there is an immediate trigger it only gets digital data on about 1 out of 3 runs. I also tried enabling the digital version of the analog but it’s wonky, as shown in the screen below, it doesn’t always get data. (the scope trace is the same signal as the logic Data (green) signal, but I guess colors can’t be changed? (yet?) I wanted to make the scope trace green too)
Is there a way to use the scope as a trigger for a one shot mode and capture a controllable amount of digital data? Or the amount of data captured is currently only defined by the zoom level, as implied in the other (older) forum question?
Is it a bug that digital data is not always captured when using the scope (analog) capture or did I miss a setting?
I can’t seem to reproduce this issue. What version of the software are you using, and was this a one-time issue, or is it consistently reproducible by following a specific set of steps?
I think I know what’s going on here (in short, it’s likely our app’s fault). Specifically, are you seeng roughly 12ms gaps in the digital capture like in the image below?
This occurs at the start of captures for digital channels and is unfortunately a known limitation at the moment. The position of this gap can vary by a few ms from capture to capture, which might be why you are not seeing the digital recording sometimes if you are zoomed in far enough.
Sorry for the slow response. My unit just updated (I had it disconnected for a bit). The behavior isn’t consistent in terms of where I seem to see the gap but maybe I didn’t pay enough attention to that. But I think you’re probably right about the size of the gap; I wasn’t always capture at the same scale so that probably made it look like “no data” to dropouts I didn’t notice.
For now I’ll go with your explanation and if I see something that suggests it’s not what you think it is I’ll post a followup and try and get a bit more details about it.
Despite the oddities I can make it get the data I wanted; this was mostly me getting used to the new units (I had borrowed one from a friend many years back).
