1. How can one decide the speed limit of applied signal to be detected by oscilloscope i.e. given the rise/fall time of applied pulse, which parameter of DSO will decide whether the signal can be measured accurately?
2. Is there any relation in band-width and sampling rate of DSO?
Nishant,
The answer depends on what you want to measure. In general if you are looking at measuring 10-90% rise time, you should consider ~3x the BW given by the 10-90% rise time. If you are only interesting in measuring a pure sinewave then you may be able to utilize the entire BW of the scope.
Here is a white paper that was found using an online search. You may be able to find other references online as well.
Ken.
