if the scope has to be used for digital debugging...
...wouldn't it be better to build a logic analyzer instead, with, let's
say 16 inputs, detecting anything below 1v as '0' and above 1v as '1' ?
(would fit so for 5v, 3v3, 2v5 and 1v8 logic, as well as for serial i/f
with +/-12v)
this could by clocked by an internal, variable clock source, or by an
external (up) clock (rising/falling/both edges).
as only logic states would have to be transferred, communication with the
pc would be much faster than for transferring analog levels.
when writing some kind of 'intelligent' software on the pc, this thing
could also do protocol analyzing.
tino

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