The AC coupling jitter seems to be quite the serious issue.
I really wonder, how nobody noticed this scince the scopes release, considering how friggin popular the scope accually is. Expecially considering that the DS2000 series shows the same issues.
I rarely use AC coupling but I had in the past using my DS2072
Here is on a pulse trigger
And here on an edge trigger
Granted, they are only 15KHz vertical sync but I could zoom in to particular horizontal lines at 5us divisions:
Then again I haven't upgraded my firmware for almost a year. (i.e. no CAN bus decoding)
I'll try to run some tests later on at home. But I didn't find any jitter on either AC or DC coupling.
Here it was at 10ns DC coupling edge trigger 24.15 MHz signal.
I wonder if the problem was introduced later or I was just lucky to never have found the jitter since I have my scope (about 10 months I believe)
Edit: but those AC frames are stopped captures but I "think" I did look at them free running as well and no jitter but I will have to try again to make sure.