On Fri, Nov 25, 2011 at 9:56 PM, Steve . <[email protected]> wrote: > I'm curious as to what folks are doing with PC's that require micro second > accuracy for days or weeks or what have you.
The way you get the reliability is easy, it just cost money. You set up multiple servers each with its own GPS receiver. I have a Intel "Atom" powered mainboard. I looked around and found one that did not have a fan on the heat sink. These use much less power, I I hopped made less heat Without the heat there is also no thermal management so it is stable. I installed Linux and connected a Motorolla Oncore GPS. These GPSes have the PPS running at about 60nS, 1 sigma. On NTP I've not been above to get down to single uS. Seem to be running at the "dozen or so" uS level. My guess is the next is to unsolder the crystal oscillator from the main board and replace it with something better. Likely a TCXO. That should help be more then one order of magnitude. -- Chris Albertson Redondo Beach, California _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
