Hi, in reading between the lines, are you saying that in practice, the tempco of twisted pair is worse than the tempco of coax? Wouldn't any install where that was critical include a loopback to calibrate out cable delay?
On Sun, May 9, 2021 at 8:27 AM Poul-Henning Kamp <[email protected]> wrote: > -------- > Douglas Baker writes: > > > I am trying to figure what the advantage is for an antenna with the > > built-in GPS receiver is. > > On reason is that the running the twisted pairs through standard > preinstalled lightning protection barriers is trivial, whereas > certifying and finding space for a suitable lightning barrier > for coax is a lot of work. > > Another advantage is that you can reuse existing cabling in rented > buildings, instead of paying sometimes unbeliveable amounts to run > your coax to the roof. > > (One of the main reasons Telecome Cesiums are still a thing, is that > they often are much cheaper than renting space for a GPS antenna > on the roof and cabled down to your kit in the basement.) > > However, one downside is that the PPS signals may suffer from tempco > on the order of 1 µs/K. > > -- > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 > [email protected] | TCP/IP since RFC 956 > FreeBSD committer | BSD since 4.3-tahoe > Never attribute to malice what can adequately be explained by incompetence. > _______________________________________________ > time-nuts mailing list -- [email protected] -- To unsubscribe send > an email to [email protected] > To unsubscribe, go to and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] -- To unsubscribe send an email to [email protected] To unsubscribe, go to and follow the instructions there.
