W. eWatson wrote: > In some science working I'm doing, I need subsecond accuracy for > timestamps. I was told the s/w in the Subject will do the trick. > Maybe someone has used it before. I have little to go on, but > installed it successfully yesterday--I think. I gave it the > tick.usno.navy.mil NTP server name, and that finished the install. > After a minute of looking at my clock, there was no change. It happened > to > be maybe 30 sec off according to my atomic clock. What mechanism do > I need to use to truly get it started? I don't think what I did showed > it was > adjusting my clock at all. > > I gave it one NTP server, as above, but probably need more. It allows > up to 9. I'm on the west coast, California. > > There doesn't seem like much beginner support at their web site. None? > See download page at <http://www.meinberg.de/english/sw/ntp.htm>
I'm sure you'll get more comprehensive replies, but as a guide with a good Internet feed, figuring 4-5 servers, and using Windows 2000 or XP you should get within about 100ms. By making your own stratum-1 server with a $100 GPS puck such as the Garmin GPS 18x LVC and a little soldering, you can get within 0.5 milliseconds using Windows - see the top two plots here: http://www.satsignal.eu/mrtg/daily_ntp.html You just need the puck to "see" about half the southern sky. With other operating systems, results may be better. At the command prompt, enter the command "ntpq -p" and post the results here for people to help you. You may need to add ntpd.exe to your programs allowed through your firewall. Cheers, David _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
