Products > Test Equipment
Oscilloscope Zoom Out Quirk
EEVblog:
Video coming out tomorrow:
EEVblog:
--- Quote from: Gandalf_Sr on May 11, 2020, 12:44:49 pm ---How about of we all try to summarize our positions and then we can all get back to doing important stuff like playing Candy Crush?
--- End quote ---
See my latest video.
- It could be handy in certain circumstances, but most of the time not needed.
- Certainly wouldn't base a buying decision on it (Siglent + Lecroy seems to to be the only ones without it)
- In several scopes you can enable or disable it by selecting manual memory length.
- In some scopes it's a trade off vs update rate.
tautech:
--- Quote from: EEVblog on June 10, 2020, 04:57:13 am ---
--- Quote from: Gandalf_Sr on May 11, 2020, 12:44:49 pm ---How about of we all try to summarize our positions and then we can all get back to doing important stuff like playing Candy Crush?
--- End quote ---
See my latest video.
- It could be handy in certain circumstances, but most of the time not needed.
- Certainly wouldn't base a buying decision on it (Siglent + Lecroy seems to to be the only ones without it)
- In several scopes you can enable or disable it by selecting manual memory length.
- In some scopes it's a trade off vs update rate.
--- End quote ---
We look forward to your followup video Dave when you discover the capabilities of 2 obscure buttons on the Siglent front panel. ;) :popcorn:
jemangedeslolos:
--- Quote from: EEVblog on June 10, 2020, 04:54:48 am ---Video coming out tomorrow:
--- End quote ---
Someone is going to do something naughty in front of this video ;D
To be more serious, it is a very nice video, I don't know if the video comparing FFT is more popular than others but I love videos that allow you to compare a bunch of oscilloscopes on the same situations.
It is very useful to see how the user interface works compared to another or how this scope dehaves compared to another in general.
:-+
Gandalf_Sr:
Thanks for the video Dave, it captures (no pun intended) the essence of what we've been discussing in this thread.
Next challenge is the associated decode problem that came up in this thread.
Say you've captured a load of data and can zoom out, slide sideways, and zoom back in; you can see the waveform but the decode of the data (this is the gripe) for an RS232 stream can look like garbage. Why? The answer seems to be that the decode is performed on what's on the screen so, unless the decode starts at a valid data block beginning, the entire rest of the decoded data can show as junk - at least it is on my Rigol MSO5074 - even though it's clear that there's good data in the capture. Given the trigger would have been somewhere in the center of the capture, zooming out/scrolling sideways puts us into a situation where we can't control where the data capture starts and the decode algorithms aren't smart enough to search and find the beginning of a valid data block.
Any ideas?
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