[time-nuts] Subject: Re: GPS 1PPS, phase lock vs frequency lock, design

[Bob kb8tq]

Hi

Welll … ummm ….. errrr ….

With things like time re-synch going on, the only thing you should drive a clock with
is the PPS output. You can go on pretty much forever and ever with a FLL and still have
a good PPS out. 

Bob

> On Jun 23, 2019, at 10:44 PM, Hal Murray <hmurray at megapathdsl.net> wrote:
> 
> 
> tvb at LeapSecond.com said:
>> Can you explain more what you use a GPSDO for? For most people a GPSDO  is
>> merely a replacement for a stand-alone XO or TCXO or OCXO or even  rubidium.
>> As such, the more stable and accurate the frequency the  better. Which is why
>> a FLL-based GPSDO, as Leo describes, is a perfectly  fine solution. 
> 
> The obvious case where a PLL wins is using it to drive a clock.
> 
> Consider using it to drive a picPET watching the PPS from a GPS.
> 
> 
> -- 
> These are my opinions.  I hate spam.
> 
> 
> 
> 
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