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

Bob Camp lists at rtty.us
Thu Dec 6 11:23:52 UTC 2012


True, but you can do a fairly simple filter to separate the 250 KHz note you "don't want" from the 8 KHz highest frequency that you do want. There are a lot of ADC's that will do that for you with their built in filtering.


On Dec 5, 2012, at 9:23 PM, Rick Karlquist <richard at karlquist.com> wrote:

> 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.
> Rick
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.

More information about the time-nuts mailing list