Rob Watts
Member of the Trade: Chord Electronics
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- Apr 1, 2014
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Hi Rob
Thanks very much for your reply. I'm a little confused though. Won't the 2 Qutes low jitter clock be engaged when using optical as well? If not then surely USB is MUCH more preferable when using a poor quality jittery source?
Also I was under the impression that optical was immune to RF interference?
I really hope the low jitter clock works with optical though!!!
Yes the low jitter clock is engaged in both instances. But for optical, the word clock is synthesized from the DPLL (digital phase lock loop), but with USB its local to the FPGA. This gives a tiny (that is one you can only just detect via careful AB listening so in practice ain't worth worrying about) SQ benefit. Both are galvanically isolated, so free from source RF and correlated noise. Hope that explains!