Hi, ladies and gentlemen
I just got an Analog Discovery 1 rev.C from ebay.
It is second hand and it is just the basic kit (less the male jumpers).
I noticed that the BNC adapter board doesn't make use of the differential input connecting the negative input to ground.
I was planning to make use of the differential input feature (yes I know the circuits should share a GND connection) for measuring power supplies ripple, etc., but I read (and have just noticed how bad a 5MHz square wave looks on the scope tab) that without a proper adapter board the usable bandwidth is reduced to few MHzs, while with the BNC adapter board it gets around 30MHz (-3dB).
So I wonder if:
- somebody else made a dual differential input adapter board
- there is something which I do not know that make such a thing likely to be impracticable
- what should I care about if I have to devise that myself (apart tracks as short as possible and of the same length and parasitic capacitance)
- should I move this to a different section (i.e. Beginners, or Project, Designs, etc.) ?
thanks