Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-db03.r1000.mx.aol.com (Internet Inbound) with ESMTP id 6BAA4380000B4; Fri, 20 Jan 2012 16:02:28 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RoLXp-0001UZ-7q for rs_out_1@blacksheep.org; Fri, 20 Jan 2012 20:58:45 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RoLXo-0001UQ-Pe for rsgb_lf_group@blacksheep.org; Fri, 20 Jan 2012 20:58:44 +0000 Received: from mail-iy0-f171.google.com ([209.85.210.171]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RoLXm-0002bZ-B6 for rsgb_lf_group@blacksheep.org; Fri, 20 Jan 2012 20:58:44 +0000 Received: by iahk25 with SMTP id k25so2343182iah.16 for ; Fri, 20 Jan 2012 12:58:35 -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=+0EWqgo3OtXX858+bkLK7iBO+NWrI+dW2SZ3uyRyf5I=; b=YbPoaBUgGTRI9fR7IYqHphQD8uUa52fk3c75GPOybydsF3KFHMTTOXnbgBzp8rChbS VYgMmpb4S/lOl5hCzXaX+RYnnjb/xdzy89xMPP0kHRbqYKqwewiOTpU+gaijv8M+RUYF RCkaqE0RQODIlUyGL6jzn1Vo4+diWFbu877Is= MIME-Version: 1.0 Received: by 10.42.131.10 with SMTP id x10mr8668344ics.10.1327093115850; Fri, 20 Jan 2012 12:58:35 -0800 (PST) Received: by 10.231.12.140 with HTTP; Fri, 20 Jan 2012 12:58:35 -0800 (PST) In-Reply-To: <4F19D1ED.2010805@xs4all.nl> References: <4F1828F5.18343.1167B04@mike.dennison.ntlworld.com> <4F197906.15901.E0EA4E@mike.dennison.ntlworld.com> <4F19D1ED.2010805@xs4all.nl> Date: Fri, 20 Jan 2012 20:58:35 +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 8 versus 32 SNR 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: 0:2:471272352:93952408 X-AOL-SCOLL-URL_COUNT: 0 X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-m247.1 ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1d40574f19d66422b0 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none That's more like what we'd expect. So... it looks as if there's something in Mike's suggestion about th way the noise is measured is suspect. and we shouldn't put too much faith into the S/N value shown. ANdy On 20 January 2012 20:43, Albert wrote: > Mike, Andy > > Food for thought > > TX driver via att 120 dB to SDR RX brick wall filter @ 2.5kHz. > > resulting in: > > 20:30 =A0 =A0 136 PA0A Op32 +3 dB 0 km @ 000 > 19:54 =A0 =A0 136 PA0A Op8 +4 dB 0 km @ 000 > > Albert, PA0A > > > > >