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Topic: Logic priate, noise bofre trigger (Read 2620 times) previous topic - next topic

Logic priate, noise bofre trigger

I bought Logic Pirate from Seeed Studio. It works, but one thing is unexpected to me - noise before trigger.
When I ground input 0 and hit record on OLS, I can see noise before time zero:[attachment=5]
After zoom-in, I can see regular square wave[attachment=4]

The same goes when using the internal test signal and setting trigger on channel one:[attachment=3]
Triggering works as expected, but the waveform before trigger is just wrong.[attachment=2] I assume trying to run UART analysis or something would lead to a lot of garbage here.
It seems like I'm running the newest firmware ... %2F_output [attachment=0]

Honestly, I have no idea what's going on here. I'm long-time user of logic shrimp viewtopic.php?f=58&t=2396 and this is something I didn't expect. On logic shrimp, the same waveform looks like this:[attachment=1]