Allthough I dont understand chinese, It would appear that the little “spikes” on the test signal square wave indicate the compensation capacitors need adjusting. (my nano has these spikes…) also it would seem this would cause problems with a x10 probe aswell? Perhaps seeedstudio guys can provide some info here? and a method for getting this scope accurate?
In my case the squarewave signal (1khz input without 10:1 probe) looks good on the nano. I verified it against a calibrated analog oscilloskope and use an external wavegenerator.
No overshoot to see over the whole input ranges, only a little bit overcompensated at some ranges … but no problem because i don’t expect perfect compensation for an unit like this.
The internal generator also looks good, and don’t produce any overshoots.
My DSO nano is an V1.1 unit with firmware 2.02 an board revision 1.3A (i think)
