X-GM-THRID: 1199366284791738298 X-Gmail-Labels: rsgb lf X-Gmail-Received: b10098d3bd60580b4fbb4ee3c47b56d212f470a5 Delivered-To: daveyxm@gmail.com Received: by 10.54.70.6 with SMTP id s6cs388wra; Tue, 11 Apr 2006 10:21:54 -0700 (PDT) Received: by 10.48.221.15 with SMTP id t15mr1492347nfg; Tue, 11 Apr 2006 10:21:54 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mx.gmail.com with ESMTP id k23si637482nfc.2006.04.11.10.21.53; Tue, 11 Apr 2006 10:21:54 -0700 (PDT) Received-SPF: neutral (gmail.com: 193.82.116.20 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1FTMXP-0003Sw-12 for rs_out_1@blacksheep.org; Tue, 11 Apr 2006 18:20:23 +0100 Received: from [193.82.59.130] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1FTMXO-0003Sm-Ga for rsgb_lf_group@blacksheep.org; Tue, 11 Apr 2006 18:20:22 +0100 Received: from smtp802.mail.ukl.yahoo.com ([217.12.12.139]) by relay2.thorcom.net with smtp (Exim 4.51) id 1FTNmv-0008DG-Qj for rsgb_lf_group@blacksheep.org; Tue, 11 Apr 2006 19:40:32 +0100 Received: (qmail 82512 invoked from network); 11 Apr 2006 17:20:12 -0000 Received: from unknown (HELO LAPTOP) (peter.martinez@btinternet.com@81.159.159.20 with login) by smtp802.mail.ukl.yahoo.com with SMTP; 11 Apr 2006 17:20:11 -0000 Message-ID: <011201c65d8c$30a5e1a0$0300a8c0@LAPTOP> From: "Peter Martinez" To: References: <200603311839550854.021DC57E@smtp.wanadoo.fr> <000601c65582$aefd8ec0$cada380a@acer5gi5q0ubzj> <8bf118410604040532gf1861f9r9dfaa0fe2d6f4be1@mail.gmail.com> <004501c657e5$b779fbf0$0300a8c0@LAPTOP> <44395583.9070200@g3ysx.org.uk> <004b01c65c09$afc51e30$0300a8c0@LAPTOP> <443A05EE.1070703@g3ysx.org.uk> <001801c65c74$4b275b30$0300a8c0@LAPTOP> <443BD7E3.6070201@usa.net> Date: Tue, 11 Apr 2006 17:20:11 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Spam-Score: -0.7 (/) X-Spam-Report: autolearn=disabled,AWL=-0.745 Subject: Re: LF: Rugby LORAN measurement? Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: 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 Status: O X-Status: X-Keywords: X-UID: 6610 Alberto: Yes, I think you are right. Most of the pulses are 100mS duration, and the spectrum of a 10% duty cycle pulse does have a missing 10th (20th, 30th..) harmonic. Some of the pulses are 200mS. The spectrum of a 20% duty cycle pulse has missing 5th,10th, 15th harmonics, so in both cases the 10Hz sideband is missing. Once per minute there is a 300mS pulse which will not give a complete null at 10Hz. 73 Peter G3PLX