Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-ma01.r1000.mx.aol.com (Internet Inbound) with ESMTP id 3EC27380000E7; Thu, 9 Feb 2012 16:32:11 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RvbPd-0001uA-UH for rs_out_1@blacksheep.org; Thu, 09 Feb 2012 21:20:17 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RvbPd-0001u1-I7 for rsgb_lf_group@blacksheep.org; Thu, 09 Feb 2012 21:20:17 +0000 Received: from mail-iy0-f171.google.com ([209.85.210.171]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RvbPb-00034c-3m for rsgb_lf_group@blacksheep.org; Thu, 09 Feb 2012 21:20:17 +0000 Received: by iaeh11 with SMTP id h11so4767778iae.16 for ; Thu, 09 Feb 2012 13:20:08 -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; bh=bpfh7ziA1IfaFSBMRK2/xcraMoFb2cXg0nPbFiKcMmY=; b=le1A0HzMInjBosVwP6phd3KvI2pKeWG0roHpI12V9TEpjgDRDlht71HVCH3dDYRHuX w9sVTv3bHikP7WwWCMlWF7b45ke63Fb4rX41r/kzNVXhsZTvavbBjQ45HHSOzA4N6bbm vfs3VzMBbWq1EhZUPbCT4mykpObBjl6hJ46WE= MIME-Version: 1.0 Received: by 10.50.153.198 with SMTP id vi6mr6300539igb.30.1328822408352; Thu, 09 Feb 2012 13:20:08 -0800 (PST) Received: by 10.231.12.140 with HTTP; Thu, 9 Feb 2012 13:20:08 -0800 (PST) In-Reply-To: <1659D80990BC4B5482FF78B6249AACAF@JimPC> References: <4F341AE5.1050704@talktalk.net> <4F342525.1050200@talktalk.net> <4F34313C.1080005@talktalk.net> <1659D80990BC4B5482FF78B6249AACAF@JimPC> Date: Thu, 9 Feb 2012 21:20:08 +0000 Message-ID: From: Andy Talbot To: rsgb_lf_group@blacksheep.org X-Spam-Score: 1.3 (+) X-Spam-Report: autolearn=disabled,RCVD_IN_BL_SPAMCOP_NET=1.332 Subject: Re: LF: Cats among pigeons Content-Type: text/plain; charset=ISO-8859-1 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: 0:2:492073280:93952408 X-AOL-SCOLL-URL_COUNT: 0 X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-m018.2 ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1d60094f343b5b6687 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none The reported S/N (normalised to 2500Hz) for each mode should be the same; the decoding threshold is different in proportion to teh speed. If the reported value is consistently and systematically out, either there's a big mistake in the software decoding, or there are other factors coming into play. 'jnt On 9 February 2012 21:11, James Moritz wrote: > Dear Eddie, LF Group, > > So what you are saying is that the actual SNR at the decode/no decode > threshold is the same for Op8 and Op4, but that the SNR indicated by Op8 at > this level is 3dB lower than that indicated by Op4? > > Cheers, Jim Moritz > 73 de M0BMU >