Recommendation on GPS time source for FreeBSD
Per olof Ljungmark
peo at intersonic.se
Sun Jan 31 23:50:24 UTC 2010
Christian Weisgerber wrote:
> Per olof Ljungmark <peo at intersonic.se> wrote:
>> Does anyone have a recommendation on a good GPS receiver/board for use
>> with NTP/FreeBSD to create a stratum 1 public time server?
> Anything with a PPS output. The Garmin GPS 18 LVC is probably the
> cheapest option.
>> Preferably something above the Garmin "puck" level but not ridiculously
>> expensive either...
> One of the u-blox evaluation kits (e.g. EVK-5T).
There are many more factors involved than just getting a decent NMEA and
PPS signal. We are in a building with obscured view of the sky (antenna
must be on roof or at least up the wall), the server room is in the
basement (long cable runs).
Perhaps a Motorola ONCORE off e-bay + a proper antenna could be a way of
getting started, I do realise that professional timekeeping equipment is
expensive, just as any other high quality product made in small quantities.
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