Date: Wed, 12 Mar 2003 10:33:57 -0600 From: Dan Nelson <dnelson@allantgroup.com> To: Poul-Henning Kamp <phk@phk.freebsd.dk> Cc: "Andrew P. Lentvorski, Jr." <bsder@allcaps.org>, James Satterfield <james@uberduper.com>, current@FreeBSD.ORG Subject: Re: Time drift. Message-ID: <20030312163357.GG34322@dan.emsphone.com> In-Reply-To: <23484.1047449678@critter.freebsd.dk> References: <Pine.LNX.4.44.0303111613500.11177-100000@mail.allcaps.org> <23484.1047449678@critter.freebsd.dk>
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In the last episode (Mar 12), Poul-Henning Kamp said: > In message <Pine.LNX.4.44.0303111613500.11177-100000@mail.allcaps.org>, "Andrew > P. Lentvorski, Jr." writes: > > >An $8.00 wristwatch has much better time accuracy that your multi-$100 PC. > > That's because the crystal in your wristwatch is cut specially so that it > has a flat temp-co at about 23-16 C, whereas the xtal in your computer > is has a gradient all the way from 0 to 70 C. > > See: > http://www.corningfrequency.com/library/vig/Vig-tutorial_files/frame.htm http://www.corningfrequency.com/library/vig/vig-tutorial.pdf http://www.corningfrequency.com/library/vig/vig-tutorial.ppt -- Dan Nelson dnelson@allantgroup.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the messagehelp
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