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I'm sure this is good for many things, but it won't make a great digital oscilloscope. A sample rate of 125Msps is not really high enough for a bandwidth of 50MHz in that context. The low-end Rigol oscilloscopes do 1Gsps.

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I suspect it might be more useful in, for example, software-designed radio applications which should be able to make use of the full analog bandwidth and the much better dynamic range.

How do they manage that? 1Gsps ADCs are really pricy.

They time interleave four Analog Devices AD9288 [0] dual 100MS/s 8 bit ADCs that are over clocked to sample at 125MS/s (so 125MS/s times 8 = 1GS/s).

What's fascinating is a number of people in the HW community have managed to reverse engineer the Rigol DS1052 scope. A Hellene on the EEVBlog forums has lovely pencil drawn schematics [1].

[0] http://www.analog.com/en/analog-to-digital-converters/ad-con...

[1] http://www.eevblog.com/forum/blog/rigol-ds1052e-nasty-surpri...

The eevblog article was quite an interesting read. Thanks for sharing!

Just the sort of answer I was hoping for - thanks!

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