[ntp:questions] Re: PPS signal that's not synchronized with second boundaries

mike michael.no.spam.cook at wanadoo.fr
Mon Jun 26 06:52:16 UTC 2006


Hal Murray wrote:
> Suppose I had something like a Rubidium oscillator that makes
> a nice PPS signal, but it's not synchronized to a second boundary.
> 
> Is there any way to take advantage of that?
> 
> I'm thinking of something like the temperature compensation tricks.
> Use the PPS signal from the Rubidium osc to calibrate the system
> clock and either pass the correction to the kernal via a back door
> or pass it to NTP via a side door where NTP would add it to the
> correction NTP already passes to the kernel.
> 
> Has anybody done anything like this?
> 
> Of course, another approach would be to use the Rubidium osc
> to drive the system clocks.  That's simpler software at the
> cost of more complicated hardware. I haven't seen many writeups
> on how to do that.  Have I missed them? 
> 

    I guess that this has been done. http://www.moshier.net/#Rubid_pc 
will probably give you a clue.




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