Recommendation on GPS time source for FreeBSD

Per olof Ljungmark peo at
Sun Jan 31 23:50:24 UTC 2010

Christian Weisgerber wrote:
> Per olof Ljungmark <peo at> 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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