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 (one that uses color or intensity variation to tell you something about how the signal spends most of its time, like the brightness on an analog scope does -- the old DSOs just plotted min & max voltages sampled at each pixel...)?---Joel