But they are saying truth about one thing: vertical accuracy is important. For that purpose, Siglent actually makes several scopes that are designed to have vertical DC accuracy in 0,5% class. In fact even their cheapest SDS800xHD has better vertical DC accuracy then their new wonder.. By factor of 3X....
I Disagree. Same as with IC data sheets, you should be cautious when comparing values labelled as "typical".
Did you read it ?
1.5% of Full scale. For 500µV/div and 1mV/div a 2mV/div is used. Which means 6% and 3% respectively.
EDIT: I forgot DC Offset :
DC vertical offset accuracy ± 0.1 div ± 1mV ± 1.5% of offset setting.Here we have "clever" looking, very innocuous ± 0.1 div. That converts to 2.5%.
so it is : ± 2.5% ± 1mV ± 1.5% of offset setting
As opposed to SDS800xHD:
0.5 mV/div ~ 4.95 mV/div: ±1.5 %;
5 mV/div ~ 10 V/div: ±0.5 %;
Offset accuracy ± (0.5% of the offset setting + 0.5% of full scale + 1 mV)
That is cheapest 12bit Siglent scope you can get. And that is with much larger offset ranges than HD3.
I will double check with Siglent but as far as I know "typical" means "no worse than" in this context..
And all of 12 bit scopes from them I personally have (4 pieces, from 4 different price classes) were all well within the specs.
I do know that is not statistically significant , but does hint at trend. They do excellent job.