On Tue, Feb 14, 2012 at 11:25 AM, Ron Frazier (NTP) <[email protected]> wrote: As has been suggested by others, I know > I can get hugely better accuracy using a different GPS and PPS, and I plan > to experiment with that when I get time and money. (I've been ignoring lots > of other household things while pursuing this project.) For the moment, I > just want to get optimum performance out of the equipment that I have. For > my immediate needs, +/- 6-10 ms accuracy is perfectly adequate for what I'm > doing.
Actually I like building stuff with "junk" (junk = ham radio term for box of salvaged parts) It is so easy to build anying if you can just order whatever parts you like. You learn more f you have to use what you have. Why the short polling? NTP's real end product is a clock adjustment rate. NTP looks to see if this rate "moves around". lots of movement tel NTP that the oscillator inside your computer is not stable and can't be trusted for "long" periods of time. In might be a cheap oscillator, or your PC might be right under an air conditioning vent. It don't matter. The polling interval is set baed on (1) the stabilty of the local PC internal clock and (2) jitter on the Internet servers. NTP finds the place two lines cross and puts the polling interval there. Your nest step is to stabilize the internal temp. of the PC, turn off power management and get a thermostatically controlled fan. A good location for a home NTP server would be some internal closet that does not have an external wall r a heat/AC vent inside. Chris Albertson Redondo Beach, California _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
