Recommendation on GPS time source for FreeBSD

[dalescott at shaw.ca]

With a clear view of the sky, pretty much any receiver but the lowest grade (havIng a 1pps output) should behave about the same. Ceramic patch antennas should have a decent ground plane. If the antenna is small (e.g. most puck antenna/receivers) put in on a 10in or 12in round  metal disk (also blocks low-elevation reflected signals). 

Getting a lot better may involve considerable testing and characterization (i.e. $$'s), including site survey (line of sight obstacles, sources of multipath...), propagation/group delay in antenna/rf system, hardware involved in generating 1pps (slew rates...), sw tracking loop stability under various conditions (low signal level, addIng or dropping a satellite from the loop, ...). 

Dale

Sent on the TELUS Mobility network with BlackBerry

-----Original Message-----
From: naddy at mips.inka.de (Christian Weisgerber)
Date: Sun, 31 Jan 2010 21:29:23 
To: <freebsd-questions at freebsd.org>
Subject: Re: Re : Recommendation on GPS time source for FreeBSD

Alexandre L. <axelbsd at ymail.com> wrote:

> You can see here : http://www.meinberg.de/english/

Meinberg is one of those companies that don't even put price
information on the web site:  If you have to ask, you can't afford
it.

-- 
Christian "naddy" Weisgerber                          naddy at mips.inka.de

_______________________________________________
freebsd-questions at freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-questions
To unsubscribe, send any mail to "freebsd-questions-unsubscribe at freebsd.org"