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Gw Instek GDS2204E (200MHz 4 channel DSO) review

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tv84:
@Mortymore, is it you that have been fixing the portuguese translation?  :)

Mortymore:

--- Quote from: tv84 on May 12, 2021, 10:46:36 am ---@Mortymore, is it you that have been fixing the portuguese translation?  :)

--- End quote ---

No I haven't.
I don't even use it.  :-[

EDIT: I don't use... the interface in Portuguese. Not talking about the scope

piramida:
I read the thread with pleasure. Good oscilloscope. But there are points that can be improved.
1. One mathematical channel is not enough, at least two are needed.
2. Make it possible to select a math channel as a source for FFT and SA and for another math channel.
3. Make it possible to display only the necessary traces on the screen. For example, to be able to leave only a trace of the math channel without traces of the source channels.
4. Vertical zoom.
5. And from the category of fantasy. Make it possible to combine two input channels into one differential input.
It would be a mega device!

2N3055:

--- Quote from: piramida on September 16, 2021, 09:53:53 am ---I read the thread with pleasure. Good oscilloscope. But there are points that can be improved.
1. One mathematical channel is not enough, at least two are needed.
2. Make it possible to select a math channel as a source for FFT and SA and for another math channel.
3. Make it possible to display only the necessary traces on the screen. For example, to be able to leave only a trace of the math channel without traces of the source channels.
4. Vertical zoom.
5. And from the category of fantasy. Make it possible to combine two input channels into one differential input.
It would be a mega device!

--- End quote ---

Check Siglent SDS2000X+.

1. Yes
2. Yes
3. Yes
4. Yes
5. No and, correct that is a fantasy!  ^-^
6. It has 2Gsa/s sampling rate.
7. Much bigger screen. Touch screen.

kcbrown:

--- Quote from: 2N3055 on September 16, 2021, 01:27:21 pm ---
--- Quote from: piramida on September 16, 2021, 09:53:53 am ---5. And from the category of fantasy. Make it possible to combine two input channels into one differential input.

--- End quote ---

5. No and, correct that is a fantasy!  ^-^

--- End quote ---

I do have to wonder how hard it would be to make it a reality.  The scope already has hardware that is able to apply voltage offsets to the signal prior to amplification.  How hard would it be for the offset to include the voltage supplied by one of the channels?

I do agree that it's unlikely to become a scope feature (possibly because it's harder than it sounds?  The offset input mechanism itself would have to have a bandwidth that equals or exceeds the channel bandwidth for this to work, and that alone might be enough to nix the idea).  It'd probably be more expensive at a minimum, and it's probably better to spend the money on making the math trace fast enough and flexible enough that the absence of the differential input feature wouldn't be noticed.

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