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- Опубліковано 16 вер 2024
- 3 ways to stop oscilloscope trigger jitter on burst waveforms.
A follow-up to the Delay Line video #2: • EEVblog #386 - Glass D...
Trigger Holdoff Tutorial: • EEVblog #159 - Oscillo...
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There is a fourth way (on the 6000 - I assume also in the X scopes) - Nth edge burst, which lets you trigger on a specific cycle of the burst.
This is also useful for counting the number of cycles in a burst
Was very useful when working with video so you could pick up just a single line in the frame.
Options 1 and 3 work on an old free or sub 100 buck analog scope!
external trigger and even different types and lengths of probes can have timing skew issue. Any good digital scope has an option to calibrate this out. But this minor issue has nothing to do with the stable triggering that this video is about.
I always learn something new watching these videos!
These videos are my job!
With the 3rd option, wouldn't you get an additional timing issue when using a trigger from the function gen at low time base's? Depends on the length of the trigger cable of course, but would the few nano seconds be enough to throw your silly-scope out while using an external trigger?
Also, ignore the anti delay line comments, its nice to see how people controlled the timing of things back in "ye olde days" when you couldn't change timing by adding a delay inside the software :P.
Awesome vid! I now understand what the external trigger input is for on my scope... Or do I....
That wouldn't be a bad video if you want to, Dave.
Good stuff. I really enjoy these educational videos. Tear-downs are cool, but this is where it is at.
Woot!
I (at least a bit in part) prompted a video!
I wanted to relive the old days, when I was a boy, when UA-cam had a 10 minute time limit. I thought this one would take 5min, but you know, I like to ramble....
Excellent vid Dave - concise and to the point!
Wait... to the point? This guy must be an imposter. Not one mention of brick outhouses or uncle Bobs. Oh dear! Our Dave has been kidnapped!
The problem also occurs when you have no script, and do not know exactly what you are going to say until you hit record!
So you thought it'd take 5 minutes and used the other 4 minutes and 32 seconds to warm up? I know that problem though, never enough time. But the problem only occurs if you don't just talk but actually have something to say. A problem not many people are familiar with these days.
Side question Dave: You mentioned your main work bench has this great blue heat resistant anti-static pad. Do you know who makes it and what model it is so I can google it?
Thanks!
Thank you very much for this short interesting video
good video, thanks.
One trigger happy scope :-)
Hi Dave,
Great video :)
However I guess the title of "Trigger Jitter" is misleading for this video,
because the discussion is just about trigger holdoff and how to get the same waveform on the scope window for each "Single" trigger that we do or if we put the scope in triggered sweep "Run" mode.
As per my understanding, oscilloscope trigger jitter is entirely different & is the horizontal jitter that the oscilloscope itself adds to the displayed waveform due to the trigger circuit voltage noise & jitter.
Regards,
Arun
PS:
I might be wrong but this is what Iunderstood from the below sources:
- www.edn.com/electronics-news/4385253/How-to-measure-display-jitter
- m.eet.com/media/1164733/3829-the_evolution_of_trigger_jitter.doc
You can equip a decent lab for under $1K
niceeeee
Under 10 minutes? What is wrong with you? :)
Can´t. take. another. delay. line. video. urgh. xD
I am, they are to awesome not to watch. :D
:P
:)
:D