Date: Mon, 01 Feb 2010 00:50:18 +0100 From: Per olof Ljungmark <peo@intersonic.se> To: Christian Weisgerber <naddy@mips.inka.de> Cc: freebsd-questions@freebsd.org Subject: Re: Recommendation on GPS time source for FreeBSD Message-ID: <4B66173A.2070506@intersonic.se> In-Reply-To: <hk4sfg$2m6r$1@lorvorc.mips.inka.de> References: <4B64010C.6020604@intersonic.se> <hk4sfg$2m6r$1@lorvorc.mips.inka.de>
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Christian Weisgerber wrote: > Per olof Ljungmark <peo@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). > http://www.u-blox.com/ > 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. Thanks,
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