On Mon, Oct 3, 2016 at 9:41 PM, Larry Hower <ho...@hower.net> wrote: > > > 1. We are using desktops and laptops in separate locations running XP or > Win 10. >
Assuming you have decent GPS receivers with an un-obstructed view of the sky with 1 pulse per second output and you have let the GPS run long enough to track enough satellites then... The pulse typically has a standard deviation on the order of some tens of nanoseconds. So that is not your problem. It is software., well mostly. Also computers that manage power like notebooks are not going to give good timing performance no matter what you try. MS Windows is not the best choice for running NTP. You can do it. and many people have gotten results better then 1 millisecond. But If you are willing to give up the use of MS Windows. Then tens of microseconds is not hard. Little $35 credit card sized computers (Raspberry Pi) running Linux and NTP with a GPS input are easy to get an order of magnitude better than your requirement. So are you stuck with windows. f so it can work with some rather complex setup. If you can select another OS then you get out of the box sub-millisecond performance with little effort -- Chris Albertson Redondo Beach, California _______________________________________________ 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.