[time-nuts] Re: PCTEL Timing Antenna with integrated GPS Receiver?

[Poul-Henning Kamp]

--------
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.

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