[time-nuts] WWVB Dephaser Question

Ole Stender Nielsen olstni at mail.tele.dk
Sat Oct 10 12:13:40 UTC 2020


A general comment on the use of Schmitt-trigger and counters on a 
conditioned analog signal:
You will likely run into issues with missing counts or additional counts 
when the receiver experiences fadings or glitches (lightning, etc.)
If this happens, the 60 kHz signal will jump in phase.

Ole


Den 08-10-2020 kl. 20:07 skrev rcbuck at atcelectronics.com:
> I have read several different articles where the WWVB phase shift is
> eliminated by doubling the signal to 120 kHz. Several members of the
> list have built these units.
>
> Assume I build a circuit to double the incoming signal and use a schmitt
> trigger to get a 120 kHz square wave.  If I then divide that signal back
> down to 60 kHz will that signal be strong enough to swamp out the WWVB
> signal? I'm guessing it will be since it is at the 5 volt level and
> somewhere in the +25 dBm or greater range.
>
> Ray,
> AB7HE
>
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