On Friday, February 6, 2015 at 3:38:14 PM UTC-6, William Unruh wrote: > > Is there any reason why I could not share the PPS output of say, my u-blox > > 7 GPS module on multiple computers? Would it be good or bad to peer these 2 > > systems with each other? > > By share you mean run the PPS output to each of the computers? The main > thing you would need to do is make sure that the gps is able to handle > the current load, and that the signals had the appropriate level at each > of the computers.
Yes, exactly what I mean. > > > > > > On the opposite end of the spectrum, would it be reasonable to have a PPS > > output from said module on a computer, with a second PPS (from another GPS > > module) on that same computer? > > Sure. you need to have two differnt interrupt lines available (GPIO, > serial ports, parallel ports) > Awesome! > > > > The Chronodot/DS323X chips have 1 Hz sqaure wave output and they have +/- > > 2ppm. It seems that the ATOM clock driver could be used, but would it be > > better to write a driver specifically for this chip? > > 2PPM is not that great. That is one second out per 6 day. A minute out > per year. > What is that chip. > I was thinking more as a worst case, offline for hours situation. Perhaps a new driver could 'sync' the Dallas Semiconductor/Maxim DS3231 OXCO Real Time Chip periodically. What is the ppm error of the RTC in a pc or my MacBook? > > Does someone know the admin of tick.uh.edu? I am not getting a response > > from them or the server. > > What reponse do you want? Why should they respond to you? I would like to use tick.uh.edu as one of my 'local' Stratum 1's. I have 1 from Oklahoma, but I'm in Texas... and the server is either down, or the name has changed on Pulic Strat 1's list hasnt been updated. _______________________________________________ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
