Electronics > Beginners
Oscillo-confusion MHz GSa/s wfm/s Mpts
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FriedMule:
When trying to find the "best" scope for the money, I stumble over all sort of technical data as sample rade, memory depth, bandwidth and a lot more.
350Mhz 14M wms/s or 200Mhz 140M wms/s and so on, what is important and why (MHz - GSa/s - wfm/s - Mpts or ??? :-)
tggzzz:
Bandwidth and samples/second are completely independent. Bandwidth is all that matters in a scope, except to salesmen. I have an ~4GHz scope with ~40kS/s.

Apart from that fundamental, there are many threads on "scopes for beginners" on this forum.

The key points are to define what you will use the scope for, and whether you have other necessary equipment. Plus you shouldn't forget the cost of probes :)
mvs:

--- Quote from: tggzzz on December 31, 2018, 02:40:55 pm ---Bandwidth and samples/second are completely independent. Bandwidth is all that matters in a scope, except to salesmen. I have an ~4GHz scope with ~40kS/s.

--- End quote ---
Equivalent time sampling scopes work with repetitive signals only.
For general use one needs both ADC with fast sampling speed and analog frontend with high bandwidth.
tggzzz:

--- Quote from: mvs on December 31, 2018, 03:46:31 pm ---
--- Quote from: tggzzz on December 31, 2018, 02:40:55 pm ---Bandwidth and samples/second are completely independent. Bandwidth is all that matters in a scope, except to salesmen. I have an ~4GHz scope with ~40kS/s.

--- End quote ---
Equivalent time sampling scopes work with repetitive signals only.
For general use one needs both ADC with fast sampling speed and analog frontend with high bandwidth.

--- End quote ---

Of course.

Your statements, while correct, neither conflict nor change my statements.
helius:
Those are only the headline specs! Depending on what you need to do, there are many more things that can matter, like sensitivity, ENOB, blind time, channel-to-channel matching, and more picayune stuff like measurements, math functions, fft, go/no-go, etc etc
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