[time-nuts] Very challenging phase noise measurement, does anyone have an idea??

Rick Karlquist richard at karlquist.com
Thu Dec 6 02:23:25 UTC 2012

Bob Camp wrote:
> Hi
> You might be surprised by the noise floor of an XOR run at 125 KHz. They
> are quite good at that low a frequency.
> Bob

An XOR, unlike a mixer, does not have a null when the
phases are in quadrature.  This is the fundamental problem
with using it as a phase detector.


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