[email protected] said: > If the Internet is very bad, you could even use the GPS over USB (with the > virtual baud rate set high, e.g. 57600 baud). Although USB is worse than a > serial port connection (where the DCD line is used to send the PPS signal), > it may still be better than a really poor Internet connection.
Unless your internet connection is really crappy, it will be better than a serial (non PPS) connection from a low cost GPS unit. There is huge (ballpark of 100 ms) wander on the serial output of all the low cost units I've tried. I say wander rather than jitter because it is very low frequency. You can't filter it out by averaging over a small number of samples. You can get worse problems from bufferbloat on slow DSL lines. All it takes is a big/long download. -- These are my opinions. I hate spam. _______________________________________________ pool mailing list [email protected] http://lists.ntp.org/listinfo/pool
