Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mp05.r1000.mx.aol.com (Internet Inbound) with ESMTP id E881738000085; Fri, 20 Jan 2012 12:48:31 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RoI73-00070d-T1 for rs_out_1@blacksheep.org; Fri, 20 Jan 2012 17:18:53 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RoI73-00070P-8M for rsgb_lf_group@blacksheep.org; Fri, 20 Jan 2012 17:18:53 +0000 Received: from mail-iy0-f171.google.com ([209.85.210.171]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RoI70-0000Nw-Ue for rsgb_lf_group@blacksheep.org; Fri, 20 Jan 2012 17:18:53 +0000 Received: by iahk25 with SMTP id k25so1894095iah.16 for ; Fri, 20 Jan 2012 09:18:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type:content-transfer-encoding; bh=jLYGBXEoHWAkHOYMJmGNcHLfhLC/wFMFuwy6nBQ4AEA=; b=puR9jlqYzwOJuEz8s40ToZZWlAe/7+/ynAI7QMpkfP+WjbAYd30kIRJY+Bm49QomEc bhKpnsp9I7umetPDGy24LGwPOQdd2SXeT6SKJE0MmNkeVWzHme4RQtZJ0/YcyCDWAA85 dGR17wYf1b4CXXEyiYeWKcs70116CbenihRxM= MIME-Version: 1.0 Received: by 10.42.131.10 with SMTP id x10mr8052103ics.10.1327079923510; Fri, 20 Jan 2012 09:18:43 -0800 (PST) Received: by 10.231.12.140 with HTTP; Fri, 20 Jan 2012 09:18:43 -0800 (PST) In-Reply-To: <4F199D33.7010500@xs4all.nl> References: <4F1828F5.18343.1167B04@mike.dennison.ntlworld.com> <4F197906.15901.E0EA4E@mike.dennison.ntlworld.com> <4F199D33.7010500@xs4all.nl> Date: Fri, 20 Jan 2012 17:18:43 +0000 Message-ID: From: Andy Talbot To: rsgb_lf_group@blacksheep.org X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: Opera speeds Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable 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 x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:499700576:93952408 X-AOL-SCOLL-URL_COUNT: 0 X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-d257.2 ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1dc1494f19a8ef7c05 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Curiouser and curiouser. The dB values ought to be the same whatever the mode. The assumption that it was normalised to 2500Hz automatically would have assured that. But you have a very clear differeence that even exceeds the ratio of bandwi= dths. There is definitely something else going on in the decoder and measurement of S/N Perhaps in the method used to estimate S/N What a pity Mr Ros is so unwilling to share the innards of his work to explain what. I've just been reading up on the new PSK2k Meteor Scatter waveform by DL5HG http://www.dk5ew.de/2012/01/13/psk2k-a-new-meteorscatter-mode-by-dj5hg/ There everything is described in precise details, the waveform description and reasoning behind the pulse shape, how the data is encoded, the error correction, interleave everything. A shining light to how amateur datamodes should be presented. Andy www.g4jnt.com On 20 January 2012 16:58, Albert wrote: > > Mike, Andy > > Reports from today. I was curious what the difference would be between op= 8 > and 32. > > 13:58 =A0 =A0136 PA0A de G3XDV Op8 465 km -14 dB in Welwyn, IO91VT > 13:49 =A0 =A0136 PA0A de G3XDV Op32 465 km -7 dB in Welwyn, IO91VT > 13:16 =A0 =A0136 PA0A de G3XDV Op8 465 km -18 dB in Welwyn, IO91VT > 12:24 =A0 =A0136 PA0A de G3XDV Op8 465 km -17 dB in Welwyn, IO91VT > > Albert PA0A >