Here's a question:
Is the multiple waveform just a temporary artefact that goes away after a time - the specific interest being how long that time can be?
In the Keysight scope the artefact was visible ... but only for a sub second time interval.
Could it be that the Siglent will clean its act up ... but it might be less disciplined and take an unspecified time period to do it?
In this video, we see this occur quickly at times - and then at around the 18:50 mark, it takes around 7 seconds. Perhaps the times it "didn't" were simply from Dave not waiting long enough.
I'm not excusing the behaviour - just looking at a possibility.
In video there is also one mysterious.
When it have multiple waveforms captured (of course, this is mostly not one trigger event) and display these on the screen, it display continuously many seconds when Dave talk. Then it suddenly "clean" display and only one wfm is displayed. Just at this moment there can see that
Trigger indicator blinks shortly. This is unexpected. If look carefully this short blink can see. What it is? Why?
I have tested this now many ways with SDS1104X-E brother SDS1202X-E.
In normal mode it leave all these wafeforms continuously on the screen what are captured and displayed in last display frame. What are in previous display frame, they disappear (of course but human eye fading bit slowly). After then if no anymore trigger events it keep these on the screen continuously and infinite. Until trigger event or user hit example run/stop what leave last one on the screen.
A.
If user want first trigger event single waveform displayed and then stop. Trigger mode Single.
B.
If user want last event(s) there is two way and trigger mode Normal in use.
- B1. Acg mode fast.
It leave after last trigger event, this last frame visible independent of if it have single or multiple events. (bug or not but this it do and I like it do this - because it have more tools for look details)
- B2. Acg mode slow.
It capture only single trigger event to one display frame. After last trig, it display this last frame where is last captured waveform. If user want this, just use this.
If it is too complex, on the markets can find more simple scopes.
But I like that scope is slave and I am mastrer who select how scope do. Not vice versa.
If there is multiple frames captured after acquistion started (fast or slow) and trig Normal mode. Last frame is displayed if no anymore trigger events.
User can stop oscilloscope pressing Run/stop or History. At this point it clean and leave last wfm to display.
If it was fast mode and last frame and previous frames have single or multiple waveforms these every waveform can look separately using history view. (up to max buffer depth - depending settings)
This is because waveform history buffer is not "frame recorder". It record every single waveform, idependent of how many waveform is in run mode overlayed in one display frame. Also every waveform have individual time stamp.