Re: Slightly OT: What good does oversampling provide in an oscilloscope?


Joel Kolstad wrote:
If I have a digital oscilloscope that has, say, a 1GHz bandwidth, presumably I
need to sample the input signal at something above 2Gsps if I want to capture
all the information present in the signal -- say 2.5Gsps given the anti-alias
filters I might be able to realistically build.

I see, though, that something like a Tektronix DPO4104 actually samples at
5Gsps. I understand how that can buy them another 6dB SNR (from noise
reduction), but other than this... does oversampling buy you anything on a
DSO?

Does anyone out there prefer a classic analog scope like a Tek 2465B over a
*modern* DSO

Always when I'm measuring noises. The Nyquist effect is still there
even you have a very good antialising filter.

greetings,
Vasile Surducan

.