From owner-freebsd-questions@FreeBSD.ORG Tue Apr 22 12:32:53 2003 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5F7AA37B401 for ; Tue, 22 Apr 2003 12:32:53 -0700 (PDT) Received: from grumpy.dyndns.org (user-24-214-34-52.knology.net [24.214.34.52]) by mx1.FreeBSD.org (Postfix) with ESMTP id 87C9643FD7 for ; Tue, 22 Apr 2003 12:32:52 -0700 (PDT) (envelope-from dkelly@grumpy.dyndns.org) Received: from grumpy.dyndns.org (localhost [127.0.0.1]) by grumpy.dyndns.org (8.12.9/8.12.9) with ESMTP id h3MJWp14013794; Tue, 22 Apr 2003 14:32:51 -0500 (CDT) (envelope-from dkelly@grumpy.dyndns.org) Received: (from dkelly@localhost) by grumpy.dyndns.org (8.12.9/8.12.9/Submit) id h3MJWo6k013793; Tue, 22 Apr 2003 14:32:50 -0500 (CDT) Date: Tue, 22 Apr 2003 14:32:50 -0500 From: David Kelly To: Volker Kindermann Message-ID: <20030422193250.GA13774@grumpy.dyndns.org> References: <20030422184554.GA13432@grumpy.dyndns.org> <20030422211611.10aa753a.freebsd@secspace.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20030422211611.10aa753a.freebsd@secspace.de> User-Agent: Mutt/1.4.1i cc: freebsd-questions@freebsd.org Subject: Re: Accurate time without a network connection? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 22 Apr 2003 19:32:53 -0000 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.