Delivered-To: daveyxm@virginmedia.com Received: by 10.50.208.67 with SMTP id mc3csp128551igc; Mon, 19 May 2014 01:19:55 -0700 (PDT) X-Received: by 10.180.89.1 with SMTP id bk1mr11402918wib.35.1400487594310; Mon, 19 May 2014 01:19:54 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com. [195.171.43.25]) by mx.google.com with ESMTP id dm4si8142651wjb.26.2014.05.19.01.19.53 for ; Mon, 19 May 2014 01:19:54 -0700 (PDT) Received-SPF: none (google.com: owner-rsgb_lf_group@blacksheep.org does not designate permitted sender hosts) client-ip=195.171.43.25; Authentication-Results: mx.google.com; spf=neutral (google.com: owner-rsgb_lf_group@blacksheep.org does not designate permitted sender hosts) smtp.mail=owner-rsgb_lf_group@blacksheep.org Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Wm5vm-0007Ne-3o for rs_out_1@blacksheep.org; Sun, 18 May 2014 19:35:30 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Wm5vi-0007NK-Pz for rsgb_lf_group@blacksheep.org; Sun, 18 May 2014 19:35:26 +0100 Received: from parrot.netcom.co.uk ([217.72.171.49]) by relay1.thorcom.net with esmtp (Exim 4.82) (envelope-from ) id 1Wm5vg-0006AY-Vd for rsgb_lf_group@blacksheep.org; Sun, 18 May 2014 19:35:25 +0100 Received: from sb.abelian.org (i-194-106-52-83.freedom2surf.net [194.106.52.83]) by parrot.netcom.co.uk (Postfix) with ESMTP id 0D9583273EE for ; Sun, 18 May 2014 19:32:23 +0100 (BST) Received: from [127.0.0.1] (localhost [127.0.0.1]) by sb.abelian.org (Postfix) with ESMTP id 9DFA628A02ED for ; Sun, 18 May 2014 18:35:23 +0000 (UTC) Message-ID: <5378FD6B.9040400@abelian.org> Date: Sun, 18 May 2014 18:35:23 +0000 From: Paul Nicholson User-Agent: Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/20130106 Thunderbird/17.0.2 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <536F1A51.3060806@abelian.org> <078901cf6d1b$4179a730$c46cf590$@comcast.net> <5370FABB.8020500@abelian.org> <53711C3E.4040207@gmail.com> <53724676.20309@abelian.org> <5378AC0C.20704@abelian.org> <5378BD26.20500@gmail.com> In-Reply-To: <5378BD26.20500@gmail.com> X-Spam-Score: 0.7 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Stefan wrote: > Does this suggest that a 100 uW signal can make it over > the pond?? No it is first necessary to be able to see the carrier at the receiver - in some sufficiently narrow bandwidth. Once the carrier is measured, a symbol period can be chosen which will send a message at close to the theoretical maximum rate even with an exceedingly weak signal. [...] Content analysis details: (0.7 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [217.72.171.49 listed in list.dnswl.org] 0.7 SPF_NEUTRAL SPF: sender does not match SPF record (neutral) X-Scan-Signature: 4ad5f3f1a9241b934aaa5d0e23c9dc57 Subject: Re: VLF: Coherent BPSK at 8270 from DF6NM Content-Type: text/plain; charset=ISO-8859-1; format=flowed 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=0.9 required=5.0 tests=FROM_ENDS_IN_NUMS 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 Stefan wrote: > Does this suggest that a 100 uW signal can make it over > the pond?? No it is first necessary to be able to see the carrier at the receiver - in some sufficiently narrow bandwidth. Once the carrier is measured, a symbol period can be chosen which will send a message at close to the theoretical maximum rate even with an exceedingly weak signal. -- Paul Nicholson --