Delivered-To: daveyxm@virginmedia.com Received: by 10.50.93.2 with SMTP id cq2csp55693igb; Tue, 10 Sep 2013 22:32:30 -0700 (PDT) X-Received: by 10.180.13.210 with SMTP id j18mr15762838wic.51.1378877549840; Tue, 10 Sep 2013 22:32:29 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com. [195.171.43.25]) by mx.google.com with ESMTP id pm9si9172172wjb.20.1969.12.31.16.00.00; Tue, 10 Sep 2013 22:32:29 -0700 (PDT) Received-SPF: neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) client-ip=195.171.43.25; Authentication-Results: mx.google.com; spf=neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) smtp.mail=owner-rsgb_lf_group@blacksheep.org Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1VJcaE-0003Zk-54 for rs_out_1@blacksheep.org; Wed, 11 Sep 2013 06:03:18 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1VJcaD-0003Zb-GY for rsgb_lf_group@blacksheep.org; Wed, 11 Sep 2013 06:03:17 +0100 Received: from smtp2.virginbroadband.com.au ([123.200.191.52] helo=smtp.virginbroadband.com.au) by relay1.thorcom.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.77) (envelope-from ) id 1VJcaB-0007Zn-63 for rsgb_lf_group@blacksheep.org; Wed, 11 Sep 2013 06:03:16 +0100 Received: from [123.200.236.228] (unknown [123.200.236.228]) by smtp.virginbroadband.com.au (Postfix) with ESMTP id AF977900A28; Wed, 11 Sep 2013 15:03:05 +1000 (EST) Message-ID: <522FF986.5010103@virginbroadband.com.au> Date: Wed, 11 Sep 2013 15:03:02 +1000 From: edgar User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:17.0) Gecko/20130801 Thunderbird/17.0.8 MIME-Version: 1.0 To: "600m@yahoogroups.com" <600m@yahoogroups.com>, "rsgb_lf_group@blacksheep.org" X-HELO-Warning: Remote host 123.200.191.52 (smtp2.virginbroadband.com.au) used invalid HELO/EHLO smtp.virginbroadband.com.au - verification failed 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: Hi Group, What is the mechanism for the way radio signals combine in the air? For example [...] 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 [123.200.191.52 listed in list.dnswl.org] -0.7 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain X-Scan-Signature: b77892ad90d0261eaf071f4f6cf31464 Subject: LF: Radio signals 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=0.0 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: 810 Hi Group, What is the mechanism for the way radio signals combine in the air? For example 1.There are two transmitters each sending out the same fixed frequency sine wave signal. 2. There are no other signals in space, and no background noise. 3. There are no propagation factors modifying the signals. e.g. buildings, ionosphere layers. 4. Both transmitters are the same distance from the receiver. 5. Both signals have the same polarisation. How have the signals combined when they reach a receiving antenna at a reasonable distance from both transmitters? It the process addition, multiplication or some other process? Regards, Edgar Moonah, Tasmania.