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Oscilloscope Zoom Out Quirk
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tautech:

--- Quote from: jemangedeslolos on June 16, 2020, 12:14:54 pm ---
--- Quote from: tautech on June 16, 2020, 11:37:18 am ---Yet they do that without fault !
All the primary timebase record can be panned through from within the zoomed window.
And Navigate to any time position in the capture too.

An example of the required setup posted in another thread:


--- End quote ---

I know my english is bad but if you try to decrypt, it is not quite exactly what ntcnico suggests.
You can only see beautiful colors on the top window but you cannot compare this signal with the signal zoomed in the bottom window.
The "dual time base" thing on analog scope that ntcnico is trying to explain.
If you choose very close timebase, you will see the problem.

--- End quote ---
Yes in this case the zoomed timebase is not large enough to show the portion from which it is taken although the H Pos trigger pointer and the zoom time marker (73.6us) indicate the main zoom window reference to the 0s position in the capture.
Is that not clearly enough marked ?

Oh and have a look at the video I linked in this post:
https://www.eevblog.com/forum/blog/eevblog-1312-siglent-oscilloscopes-crippling-history-mode!/msg3097466/#msg3097466
jemangedeslolos:
Ok, me either I can't seem to make myself understood.
I'm going to take Gandalf_Sr's advice and take a break  ;D
Sighound36:
jemangedeslolos

I feel you English is rather good, far better in fact than a lot of my compatriots  :clap:

Managed the same result on the Rigol MSO8000 only the capture time was far longer due to the 500Mpts of memory.

However still had to manually set the acquire <> Memory depth to max and single shot capture.

This I am absolutely  convinced is due to the way manufactures prioritise the feature with the memory, capture rates and implementation of how its done. In the marketing blurb.  This *may* then cause conflicts within the certain aspects of the way the scope works with other  functions. However Siglent should give you a working option to adjust and turn off this memory feature just my observation
rf-loop:

--- Quote from: tautech on June 16, 2020, 11:37:18 am ---
--- Quote from: jemangedeslolos on June 16, 2020, 10:13:59 am ---show that the automatic management on the Siglent doesn't allows (for example) to look at a high bitrate packet in both the top zoomed window and the bottom window AND then look at another position WITHOUT having to recapture.

--- End quote ---
Yet they do that without fault !
All the primary timebase record can be panned through from within the zoomed window.
And Navigate to any time position in the capture too.

An example of the required setup posted in another thread:


--- End quote ---

This is clear and ok.

But IF we need long capture where is zoomed in main window and then zoomed in zoom window or not more zoomed in zoom window but different position in whole capture.

Oscilloscope what works full window zoom mode and have normal window split zoom can do it.
main window is zoomed in window to whole capture length. Zoom window is same time scale than main window or zoomed in more.  So there is three things. 1. Whole capture length, over display width. 2. Main window what show more or less "zoomed in" part of this depending time scale and memory length. 3. Then  there is what we normally call zoom window, what can normally be same time scale what main window or more short part of it aka zoomed in".
With this kind of working principle it is possible to look two separate zoomed in part from whole memory length. But usually in runtime can not see (in this case) whole memory at once on screen without hidden parts.

Of course also this fixed memory length principle where main window is some time slice from whole memory (full window zoom mode principle) can do better but display size is real bottle neck for make dual independent zoom window both with own independent  timebase (time scale) and both with fully independent time position related to reference point what can be trigger position and also trigger position fully free to set what ever position in whole memory length or out from capture memory  and so on.

2N3055:

--- Quote from: nctnico on June 16, 2020, 12:42:11 am ---Or let's pull in a quote from Albert Einstein. He wasn't so subtle:
Great spirits have always encountered violent opposition from mediocre minds.  >:D

--- End quote ---

Oh I get it now.. Your'e Albert Einstein and I'm mediocre mind... Sorry it took me so long to get it... But that explains it...

But I gotta give you , you do have great sense of humour..  ^-^
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