Return-Path: Received: (qmail 76031 invoked from network); 9 Mar 2004 13:08:38 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore04.plus.net with SMTP; 9 Mar 2004 13:08:38 -0000 Received: (qmail 43836 invoked from network); 9 Mar 2004 13:08:38 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by ptb-mxscan03.plus.net with SMTP; 9 Mar 2004 13:08:34 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1B0gyH-000AyA-U4 for dave@picks.force9.co.uk; Tue, 09 Mar 2004 13:08:33 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1B0gxg-0000su-J0 for rs_out_1@blacksheep.org; Tue, 09 Mar 2004 13:07:56 +0000 Received: from [130.244.199.132] (helo=fep04-svc.swip.net) by post.thorcom.com with esmtp (Exim 4.14) id 1B0gxf-0000sl-RI for rsgb_lf_group@blacksheep.org; Tue, 09 Mar 2004 13:07:55 +0000 X-Fake-Domain: oemcomputer Received: from oemcomputer ([213.101.41.46]) by fep04-svc.swip.net with SMTP id <20040309130754.NOK12365.fep04-svc.swip.net@oemcomputer> for ; Tue, 9 Mar 2004 14:07:54 +0100 X-Bad-Message-ID: no DNS (oemcomputer) Message-ID: <000c01c405d7$9a522a00$2e2965d5@oemcomputer> From: "Johan Bodin" To: rsgb_lf_group@blacksheep.org References: <7D653C9C42F5D411A27C00508BF8803D01A9F48C@mail.dstl.gov.uk> Date: Tue, 9 Mar 2004 14:07:38 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Subject: LF: Re: RE: Ionospheric doppler ? Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Alberto, Andy is right. Radio clocks keep the receiver turned off most of the time to save battery power. For example, my own alarm clock ("EuroChron") synchronises to DCF77 once per hour. The "radio icon" in the LCD display starts flashing for a minute between xx.59.00 and the full hour. If it fails to decode correctly (parity check etc), the receiver (and flashing) stays on until valid data is received. BTW, my wife took the clock on a trip to Finland a few years ago and accidentally pressed the reset button. Finland is too far away from the DCF77 transmitter and, needless to say, there was no buttons for manually setting the clock :-) 73 Johan SM6LKM