On Fri, Feb 6, 2015 at 3:17 PM, <[email protected]> wrote: > Ok, so these questions might be off the wall. >
Yes. > > Is there any reason why I could not share the PPS output of say, my u-blox > 7 GPS module on multiple computers? Of course you can. However the correct way to do this is with a distribution amplifier and it would be cheaper to buy another GPS. Would it be good or bad to peer these 2 systems with each other? > It depends. What are you trying to do? > > 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? > It depends on why you would do it. Again what are you trying to do? > 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? > RTC parts are not intended for hold-over input into NTP. Unless you've lost network access you'd do better to use a remote system. > > And a side question: Is it the GPS module that calculates when the PPS > goes active? If by calculate you mean determine then yes the PPS source (typically but not exclusively a GPS in the NTP community) completely determines when the PPS signal is active but I suspect you have a different question in mind. > Is this signal compensated for the time it takes the signal from the sats > in the module, or on the SV? > I've decided I have no idea what this question means. _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
