On Mon, Aug 11, 2014 at 10:29 AM, Chris Wilson <[email protected]> wrote: > > > 11/08/2014 18:26 > > I have 4 windows based PC's on my home network, for years i have used > Meinberg or an equivalent to set the PC time.
The best way the keep the PC clocks in sync would be to run NTP on all the PCs. You say "Meinburg" I think that just one place redistributing NTP which is free. I always download from ntp.org the reference NTP implementation and build it myself but Meinberg save you the effort of building from source. Either way you seem to already have NTP running on the PCs. What you need next is a better reference clock connected at least on of the PCs. Currently, I bet they are using some other NTP server out on the Internet as a reference clock. You would do much better (almost three orders of magnitude better) if you used the Thunderbolt as the reference clock. Ignore Lady Heather for now. It is not needed for this. Pick one of the PCs, the one you are going to leave running 24x7 and connect that one to theTB using a serial cable. Yes a real RS232 serial cable. It is MUCH better to use a serial port then a serial to USB dingle. When you guid the serial cable make sure the PPS from the TB is on the DCD line and get the polarity correct. After this is done all that remains is to edit an NTP configuration file on each of the PCs. To keep this short, ask about this later if you decide to got this route. The is an NTP email list you can find on ntp.org and that is a much better place to ask about NTP then here. One more thing. Perhaps you don't have a PC with a real RS232 port you want to run 24x7. In that case you get a tiny ARM based PC like the Raspberry Pi of Beagle board for about $50." You run Linux and NTP on that and connect the Thunderbolt there. This will pay for itself from saving on the electric bill in under a year. -- 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.
