Return-Path: Received: (qmail 1021 invoked from network); 26 Jan 2001 11:20:44 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 26 Jan 2001 11:20:44 -0000 Received: (qmail 5683 invoked from network); 26 Jan 2001 11:24:14 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 26 Jan 2001 11:24:14 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14M6sI-000302-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 26 Jan 2001 11:17:02 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from mail.cc.kuleuven.ac.be ([134.58.10.6]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14M6sG-0002zx-00 for rsgb_lf_group@blacksheep.org; Fri, 26 Jan 2001 11:17:01 +0000 Received: from LCBD15.fys.kuleuven.ac.be (LCBD15.fys.kuleuven.ac.be [134.58.80.15]) by mail.cc.kuleuven.ac.be (8.9.3/8.9.0) with SMTP id MAA67158 for ; Fri, 26 Jan 2001 12:16:48 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3.0.1.16.20010126130746.21c7102e@mail.cc.kuleuven.ac.be> X-Sender: pb623250@mail.cc.kuleuven.ac.be X-Mailer: Windows Eudora Pro Version 3.0.1 (16) Date: Fri, 26 Jan 2001 13:07:46 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: RE: VA3LK seen in ON In-reply-to: <3A715673.2CDC243F@usa.net> References: <65AECDF1F89AD411900400508BFC869F0D7567@pdw-mail-1.dera.gov.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Alberto, besides the need for a linear PA each of the tones would also have only 50% of the power. Wouldn't that 'give away' 3dB SNR ? 73, Rik ON7YD >Just out of curiosity : I was thinking, a few weeks ago, to a signalling scheme >that makes use of 2-out-of-12 tones, with the two tones being sent not >sequentially, but simultaneously. I do realize that this would mean that the >PA must be linear. Is this a though requirement for the present crop of PAs >around ? How much would this requirement be of obstacle to the adoption >of such a scheme (which could also be FEC corrected...). TNX > >73 Alberto I2PHD > > > >