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Oscilloscope Zoom Out Quirk

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Wuerstchenhund:

--- Quote from: Someone on May 09, 2020, 11:48:36 am ---
--- Quote from: Wuerstchenhund on May 09, 2020, 10:45:35 am ---Stuck with just three scopes at home  ;) I just tried to capture off screen with my Rigol DS1054z (firmware 00.04.04SP4) and guess what?

It doesn't let me go beyond the screen.

So it appears at least for the DS1000z the question if Nico's method would be possible should be answered with 'no'.
--- End quote ---
How bizarre, I was able to have that type of setup on an 1104Z:
https://www.eevblog.com/forum/testgear/new-tektronix-tbs2000-oscilloscopes/msg1283038/#msg1283038

--- End quote ---

Maybe it was fixed (broken? ;) ) in one of the recent firmware updates.

2N3055:

--- Quote from: Wuerstchenhund on May 09, 2020, 12:01:41 pm ---
--- Quote from: Someone on May 09, 2020, 11:48:36 am ---
--- Quote from: Wuerstchenhund on May 09, 2020, 10:45:35 am ---Stuck with just three scopes at home  ;) I just tried to capture off screen with my Rigol DS1054z (firmware 00.04.04SP4) and guess what?

It doesn't let me go beyond the screen.

So it appears at least for the DS1000z the question if Nico's method would be possible should be answered with 'no'.
--- End quote ---
How bizarre, I was able to have that type of setup on an 1104Z:
https://www.eevblog.com/forum/testgear/new-tektronix-tbs2000-oscilloscopes/msg1283038/#msg1283038

--- End quote ---

Maybe it was fixed (broken? ;) ) in one of the recent firmware updates.

--- End quote ---
Unfortunately, I don't have DS1000Z anymore to check... But what I remember it did behave like Someone says..

Wuerstchenhund:

--- Quote from: 2N3055 on May 09, 2020, 11:54:36 am ---DS1000z behaves differently if you set it to AUTO or if you manually fix acquisition length. 
--- End quote ---

I tried both, didn't made a difference. I could not zoom out beyond the screen data.


--- Quote ---One more thing to add to confusion.

But if you set to 24 MS length (1ch) it will get 24 MS every time, even if you set timebase to 5 ns/div.  But your retrigger rate will be the same as if you set timebase to 2ms/div (12divs, 24ms full screen).
Detail will be the same too, and it will do both at 1GS/s.  And with DS1000z , you don't even have to go into zoom mode. Timebase knob works even when stopped. So you capture at any timebase from 5ns/div to 2ms/div and get the same memory content and look at it with timebase knob and horizontal pos knob. Or you can use zoom if you like that.

--- End quote ---

Maybe that's it, I used the zoom function.

I'll try later with just going to STOP and just twiddling the timebase knob.

Update: I tried just changing the timebase, and with the memory set to manual it did indeed show the full 24Mpts. I did note some artifacts which aren't in the signal, though, so I'm not sure if this behavior is intentional

SilverSolder:

I didn't realize this was so contentious?  -  on my old Agilent 54622D megazoom,  I take it completely for granted that you can zoom both in and out (provided the horizontal speed is high enough) and I use it all the time when exploring new waveforms where it is hard to say what is going to be the best timebase - I thought this is just one of the many awesome convenience advantages of a digital scope!  :D



Wuerstchenhund:

--- Quote from: SilverSolder on May 09, 2020, 12:28:46 pm ---
I didn't realize this was so contentious?  -  on my old Agilent 54622D megazoom,  I take it completely for granted that you can zoom both in and out (provided the horizontal speed is high enough) and I use it all the time when exploring new waveforms where it is hard to say what is going to be the best timebase - I thought this is just one of the many awesome convenience advantages of a digital scope!  :D

--- End quote ---

I no longer have a 54622D but I don't think it worked any different than all the InfiniVision scopes - they only use the max available memory on short timebases if you're either in SINGLE or on the last acquisition after pressing STOP.

It's *not* about just changing the timebase to change the time period displayed on screen.

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