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New 2ch pocket DSO+SG - Zeeweii DSO2512G

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timschuerewegen:

--- Quote from: Aldo22 on October 21, 2023, 12:51:34 pm ---Yes, i had already updated the cheat sheet.
--- End quote ---

The "long press down" one is not in your cheat sheet though, there are 3 calib modes:

Long press DOWN = "Factory calib" (all versions)
Long press V = "Calib:DC offset" (V1.2.8C+ and newer)
Long press mV = Calib:AC gain" (V1.2.8C+ and newer)

Aldo22:

--- Quote from: timschuerewegen on October 21, 2023, 12:59:29 pm ---
--- Quote from: Aldo22 on October 21, 2023, 12:51:34 pm ---Yes, i had already updated the cheat sheet.
--- End quote ---

The "long press down" one is not in your cheat sheet though, there are 3 calib modes:

Long press DOWN = "Factory calib" (all versions)
Long press V = "Calib:DC offset" (V1.2.8C+ and newer)
Long press mV = Calib:AC gain" (V1.2.8C+ and newer)

--- End quote ---

OK, and what is "Factory calib"?
Is this the same as can be achieved from the "Aux" menu?


timschuerewegen:

--- Quote from: Aldo22 on October 21, 2023, 01:49:20 pm ---OK, and what is "Factory calib"?
Is this the same as can be achieved from the "Aux" menu?
--- End quote ---

No. I checked the code and it does exactly the same as "Calib:AC gain" (long press mV) but displays "Gain calib mode" instead of "Exit" when you leave that mode.

Aldo22:

--- Quote from: timschuerewegen on October 21, 2023, 02:21:10 pm ---No. I checked the code and it does exactly the same as "Calib:AC gain" (long press mV) but displays "Gain calib mode" instead of "Exit" when you leave that mode.

--- End quote ---
Thank you.
I'm not going to update the cheat sheet because of this.
The cheat sheet is not necessarily comprehensive, but it serves to
- remember shortcuts for frequently used functions
- remember functions that only work with keyboard shortcuts.

And I'd like to keep it on one A4 page for printing, so there must be a good reason to change it.  ;)


--- Quote from: timschuerewegen on October 20, 2023, 03:40:15 pm ---what else can I add/change :)

--- End quote ---

As I said before, I don't know what you can do, but you could fix bugs, for example.  ;)

The DSO2512G is actually quite usable, but there is a problem in negative DC range.
Maybe this is already fixed in newer firmware, but have a look.

Try e.g. -3 Volt Offset DC.
On my device the grid position and the "mean" value do not match.
When the line on the grid is at -3 volts, the "mean" value shows e.g. -3.2 volts.
This looks like a software problem to me, otherwise both readings would be wrong to the same degree.

timschuerewegen:

--- Quote from: Aldo22 on October 21, 2023, 03:09:54 pm ---The DSO2512G is actually quite usable, but there is a problem in negative DC range.
Maybe this is already fixed in newer firmware, but have a look.
--- End quote ---

V1.3.0C has the same "bug". I have the formula that calculates the "Mean" value from the raw FPGA data so I will check if it is a bug or a feature  :-DD



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