Terje Mathisen wrote: > The canonical DIY ntp server would be to base them on phk's choice, the > Soekris single-board computer: > > http://phk.freebsd.dk/soekris/pps/ > > Since this board has a hw counter capable of accurately timing the PPS > signals,Poul-Henning got it to run at sub-us accuracy, using a cheap > timing GPS.
A few more points: - It does not explicitly say so at the page above, but the Soekris model that Poul-Henning used was the 4501. I've only got 4801s and they're not as good for timing. - The results shown on the above page are of a 4501 that has been significantly hacked by adding a Rubidium oscillator to the mix. Not for the faint hearted and not cheap either. - The net4501 costs €136 for the board and case. Add €15 for the power supply. Then add around €100 for a GPS riming receiver and another $1700 for the Rubidium standard. Admittedly the latter is optional if your needs are modest. Cheers, Jan _______________________________________________ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
