[time-nuts] Phase noise measurement with a scope

Stefan Heinzmann stefan_heinzmann at gmx.de
Wed Jun 12 08:39:55 EDT 2013


Hi all,

given that digital scopes have a multichannel ADC for acquisition, which 
is similar to what a cross-correlating phase noise measurement 
instrument has, it occurred to me that phase noise measurement might 
also be possible with a standard digital scope and some post-processing 
software. The scope usually will have only 8 bits of resolution, but it 
will have a rather high sampling rate. With oversampling math, one may 
be able to trade one for the other, at least if the scope's analog 
frontend is not too bad.

Has anyone investigated or tried this? Is it a silly idea to start with?

Cheers
Stefan Heinzmann

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