[time-nuts] Buffering a PPS signal

Tom Van Baak tvb at LeapSecond.com
Fri May 18 19:48:24 UTC 2012


If this is for a computer and NTP then you may ignore the sawtooth.

GPS receiver sawtooth corrections are for people working at the
nanosecond level; important when you're working with disciplining
quartz or rubidium oscillators with stability at the 1e-12 level.

Computer timekeeping and NTP is a million times worse than this.

/tvb

> I don't need the sawtooth correction done in hardware because at least 
> in my case the pulse is being fed into ntpd on a Rb-clocked computer, 
> and ntpd can add the correction itself. But I'll definitely consider a 
> bigger, better board that can do the correction internally, probably in 
> a form more generic than this board which is just an interface to the 
> Resolution SMT (and perhaps Resolution T, haven't checked if the 
> mechanical aspects are the same).
> 
> -- m. tharp





More information about the time-nuts mailing list