Products > Test Equipment
SDS1104X-E Unexpected Behaviour
BillyO:
--- Quote from: tautech on November 23, 2022, 11:21:19 pm ---C'mon Billy, screenshots please !
A picture = 1000 words.
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tautech:
--- Quote from: BillyO on November 23, 2022, 11:25:49 pm ---
--- Quote from: tautech on November 23, 2022, 11:21:19 pm ---C'mon Billy, screenshots please !
A picture = 1000 words.
--- End quote ---
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bdunham7:
--- Quote from: BillyO on November 23, 2022, 11:24:35 pm ---With the "Offset" control. How would you set it?
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There are some 'offset' settings for rmath functions (DC offset in integration for example) but I've never seen or used the offset setting in the channel menu until I turned mine on just now and looked. Indeed, there it is, and it is obviously just a replication of the position knob. Why that is there, I've no idea. My SDS2354X+ appears not to have such a setting, or at least I couldn't find it right away.
There was an uncommon feature of certain CROs that would actually allow you to put a separate (from the position controls) DC bias on the inputs, often much more than the position controls could achieve. None of that is really necessary with a typical DSO, the position knob effectively does both.
Edit: for those that don't see it right away, it is on page 2 of the channel menu.
2N3055:
--- Quote from: BillyO on November 24, 2022, 03:14:10 pm ---
--- Quote from: rf-loop on November 24, 2022, 07:14:16 am ---This whole "BUG!!" is between chair and oscilloscope. Please repair this thread title. Please first try to learn basic fundamentals and after real knowledge and experience start naming things as "bugs".
Here you can of course ask how to use oscilloscope. But please, before it, try to even read the user manual first, even though it's boring.
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What an amazing A-#ole! First, I don't think you have any idea what I'm talking about. Next, unless you have something constructive to add .. STFU!
I have read the manual. Have you? As bdunham7 mentions, it's found in the 2nd page of the channel menu and it is not even mentioned in the manual.
The "bug" might simply be the fact that they have two controls that do the same thing but are labeled differently. Or it's not meant to exist. That's fine. Fix the "bug" by calling them both "position" or both "offset" or just removing it. However, not being a Finnish twat, where I come from the words "position" and "offset" mean different things, especially in context of each other.
The title stays the same. Now, vittuun!
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Well, frankly, you have colorful personality yourself...
So let us all calm down and let's figure this out..
Position and offset are actually interchangeable in this context for reasons to be discussed. And it is why I asked what do you mean by this two terms. And I didn't mean by it to be explained as to what is meaning of these two english words (know that, thank you anyways) but as to what meaning you ascribe to them in context of the scope...
I don't have SDS1000X-E so I didn't know about this distinction. Touch screen scopes from them don't have it. And I agree with RF, it is not a bug. It might be confusing design choice or misnomer but not a bug.
What I presume it has it because offset/position in DC and AC mode will differ. Maybe they wanted to have separate control for the two.
Experiment: apply 25% duty cycle 0 to 1V squarewave to scope input.
Put it in DC mode. What you see?
Center it on the screen with vertical position knob (physical one on the channel).
Change channel to AC mode. What do you see?
Now try moving it up and down with vertical position knob (physical one on the channel).
Go out in DC mode? What you see?
Center it again.
Go back in AC mode.
Now try moving it up and down with offset function ( one in the menu ).
Go out in DC mode? What you see?
Do you see any difference in behaviour now?
Would you be so kind and try this? I am also curious what would the results be.
Best,
bdunham7:
--- Quote from: 2N3055 on November 24, 2022, 03:47:32 pm ---Do you see any difference in behaviour now?
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I tried it and as I expected it made no difference. In the AC-coupled mode, the baseline was displaced to -250mV as you'd expect, but the controls work the same way--if you select 'OFFSET' the multipurpose knob has the exact same effect as the position knob. In the AC mode, the difference between the channel marker and the baseline of the waveform is always -250mV, in DC mode it always lines up.
The only thing different about the offset vs position is that if you push the multipurpose knob, you get the option of entering the value numerically, albeit painfully slowly with the turn/click method.
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