Date: Tue, 22 Apr 2003 14:32:50 -0500 From: David Kelly <dkelly@hiwaay.net> To: Volker Kindermann <freebsd@secspace.de> Cc: freebsd-questions@freebsd.org Subject: Re: Accurate time without a network connection? Message-ID: <20030422193250.GA13774@grumpy.dyndns.org> In-Reply-To: <20030422211611.10aa753a.freebsd@secspace.de> References: <20030422184554.GA13432@grumpy.dyndns.org> <20030422211611.10aa753a.freebsd@secspace.de>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, Apr 22, 2003 at 09:16:11PM +0200, Volker Kindermann wrote: > > > Looking for options to keep system time moderately accurate at a site > > without network access. So the normal application of ntpd over IP is > > not viable. Dialup modem not allowed either. > > there are external, atomic watch controlled clocks for the serial port. > Look at your electronic dealer. I know there are, but at the moment I'm not finding any. The original was "World's Most Accurate Clock" by Heathkit, $400, but long out of business. Oregon Scientific has a lot of WWV clocks but none I could find with an external interface. Surfing http://www.ntp.org/ has turned up a lot of information but little hardware. Of most interest was use of sound card connected to radio receiver for decoding the time signals. But that's a touch exotic for this application. Else I'd use the $20 LCD "atomic clock" I have on my wall, a $25 USB "web-cam", and some sort of OCR. -- David Kelly N4HHE, dkelly@hiwaay.net ===================================================================== The human mind ordinarily operates at only ten percent of its capacity -- the rest is overhead for the operating system.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20030422193250.GA13774>