# Oscilloscope specs [closed]

I'm looking to buy my first oscilloscope, no experience, hence need a bit advice on typical lower-budget scopes.

A particular purpose is to look at rise time of rectangular waves with rise time from ~5ns, of frequencies typically 10-100Hz, and up. And harmonics, for whatever features it may have for that.

I figure just from the rise time that would require a 100MHz scope. But I'm not sure of how the other specs matter.

Considering some typical specs;

 A  100MHz 500MSa/s   32k
B  100MHz 1GSa/s     40kpts
C  100MHz 1GSa/s     2Mpts
D  150MHz 1GSa/s     2Mpts
E  200MHz 500MSa/s   32k
F  200MHz 2GSa/s/CH  18kpts/CH


So, am I reading this correctly by assuming the (F) has 4 times the sample rate of the (D) when using both channels? If so that is perhaps of major importance? I don't really understand why there often is, like above, such a large differences in memory depth.. What limitations and importance does that really make?

So, any advice on these typical spec variations would be very welcome.

• If you made the question more generic, such as "What is the tradeoff between sample rate, bandwidth and memory depth" (without mentioning Siglent) it might get through. Sep 10, 2014 at 16:45
• Sep 10, 2014 at 17:16