>>On a side note, speaking of deterministic systems, why has no one built a GPSDO with an FPGA yet? Or an NTP server? :)
Yes, I have: I have a GPSDO entirely on a 50Kgates FPGA (Spartan3 XC3S50) without microprocessor. GPS is the iLotus M12M and OCXO is a Morion MV201, the DAC is... well, not exactly the best choice but it is an AD5660 16bit only, anyway it works. On Thu, Apr 5, 2012 at 8:51 AM, David J Taylor < david-tay...@blueyonder.co.uk> wrote: > I asked this on an NTP list, got some guesses, but no knowledgeable >> responses. >> > [] > > So, running a process(es) which keep the CPU completely busy reduces the >> jitter. The busier, the better. Why? I'm guessing it has something to do >> with interrupt latency, but why does a busy CPU make it more consistent - >> I'd expect the opposite? The difference is very obvious. >> >> Is there something else I can do to keep the jitter low? >> > > Mike, have you tried FreeBSD instead? Does it show the same problems? > > Cheers, > David > -- > SatSignal software - quality software written to your requirements > Web: http://www.satsignal.eu > Email: david-tay...@blueyonder.co.uk > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.