Products > Test Equipment
Oscilloscope Zoom Out Quirk
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Elasia:

--- Quote from: EEVblog on June 11, 2020, 04:33:55 am ---
--- Quote from: Elasia on June 11, 2020, 04:19:52 am ---Dave.. your latest video just made me realize something..
It CAN zoomout! It's just not how you would think to do it...
To set it up, first set a timebase that will let you use the full 200M
UNDER the horizontal key press Zoom
THEN Zoom in to the actual display/timebase you want, you can zoom in just as a normal timebase change AND keep 200 Megapoints
when the event triggers you are interested in, just be on the bottom area and do the normal horizontal adjustment out OR use the top portion to drag it to one side or the other to the area you are interested in
The bottom area is the entire normal page but has been scaled down... i think this is why they make the menu bars also cause scaling of the main screen pixels
Try it out... and post another video :P

--- End quote ---

Err, that's no different to just using a longer time base and pressing STOP or SINGLE, and then zooming in.
Using the dual screen zoom function whilst you do this makes no real difference.
This is NOT normal scope behavior and is not what is being discussed here.
The entire point of this is that you don't know you need the longer timebase until you do, so you couldn't have set it up like that to begin with.
Fact is on the Siglent the memory is not being set to the depth your specify, this is in inexcusable.

--- End quote ---

No its classic chinese out of the box thinking... you leave it like that in the first place and set your zoom in to where you want it.. works fine in all modes, stop, single, trigger, auto
Elasia:
One other bit.. the refresh rate is a bit slow.. its not a killer for sure but it gets the job done

Those screenshots are the equivalent of 200 megapoints but on 500us trigger and a view finder on top.. granted the way you go about it is ass backwards but it still is functionally equivalent
EEVblog:

--- Quote from: Elasia on June 11, 2020, 04:49:51 am ---granted the way you go about it is ass backwards but it still is functionally equivalent
--- End quote ---

It's so arse backward no one is going to use it for regular use. Again, you are missing the entire point of this.
JPortici:

--- Quote from: jjoonathan on June 11, 2020, 02:01:13 am --- History (aka configured-by-default segmented memory) is still pretty nice for serial though.

--- End quote ---

Not really segmented mode but something like that (i've seen other scopes become completely unresponsive, minus the stop button, in order to maximise the sample rate.. somewhere else also called sequence)

But yeah, history mode is the best mode :)
EEVblog:

--- Quote from: JPortici on June 11, 2020, 05:39:38 am ---Also the way LeCroy has always operated and the way Picoscopes have always operated.
Why do i have to keep telling people this?
--- End quote ---

That doesn't make it right.
Here is the thing. If you want to look at a short timebase signal then you'll set a short timebase, that's normal oscilloscope usage.
Even on a Siglent, Lecroy or Picoscope, you aren't going to go through to convoluted process of setting a slow timebase and then chosing the zoom mode and then setting the secondary timebase just for regular use.
The point is that when using the scope the normal way, you can't zoom out if you need to.
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