Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dk06.r1000.mx.aol.com (Internet Inbound) with ESMTP id 2226638000092; Sun, 12 Feb 2012 04:50:20 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RwW3r-0002zI-Ke for rs_out_1@blacksheep.org; Sun, 12 Feb 2012 09:49:35 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RwW3r-0002z9-81 for rsgb_lf_group@blacksheep.org; Sun, 12 Feb 2012 09:49:35 +0000 Received: from mail-iy0-f171.google.com ([209.85.210.171]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RwW3p-0004yl-ND for rsgb_lf_group@blacksheep.org; Sun, 12 Feb 2012 09:49:35 +0000 Received: by iaeh11 with SMTP id h11so4164158iae.16 for ; Sun, 12 Feb 2012 01:49:27 -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=gR1zDGTMPB8MCpDuKx3hok98xmc9Mg/RYzKs2Wy7wyI=; b=FrhjjJDvrtF4q1/HuHcOMOraYYFYHoQzKrGpHOikKZEiPyS4yy4uN39LGWk9fuBu6r JPlAnAYBq/uXiJBOQ58hV7M1DzOF5uvO+9f0ElkYB4tBdbtwlaI87dPD1V3si3SjsytS 8YXCLzfgchOROx8QWLK4HVs0m+EVZCZpyReQ0= MIME-Version: 1.0 Received: by 10.43.134.199 with SMTP id id7mr16592164icc.21.1329040166977; Sun, 12 Feb 2012 01:49:26 -0800 (PST) Received: by 10.231.158.68 with HTTP; Sun, 12 Feb 2012 01:49:26 -0800 (PST) In-Reply-To: <4F37899F.9060708@xs4all.nl> References: <4F341AE5.1050704@talktalk.net> <4F342525.1050200@talktalk.net> <4F34313C.1080005@talktalk.net> <1659D80990BC4B5482FF78B6249AACAF@JimPC> <4F34D86D.1010405@talktalk.net> <4F37899F.9060708@xs4all.nl> Date: Sun, 12 Feb 2012 09:49:26 +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: Cats among pigeons 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: 0:2:472562688:93952408 X-AOL-SCOLL-URL_COUNT: 0 X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-d234.2 ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1db40a4f378b5c6e4e X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Does Av mean average power, ie 50% of peak Tx ? Andy 'jnt On 12 February 2012 09:42, Albert wrote: > Hello all Opera lovers, > > Testing Opera speed op1 till op32 under "lab" conditions without the real > world phenomena like fading and QRN. > The results: > 1. if you have solid Opera decodes the received SNR stays the same when > switching between opera speeds; > 2. the only change is the minimum level where decodes are still possible. > After a large number of test transmissions I gathered the following resul= ts. > > Op1 =A0 decode @ -24dB Av > Op2 =A0 decode @ -27dB Av > Op4 =A0 decode @ -30dB Av > Op8 =A0 decode @ -33dB Av > Op32 decode @ -37dB Av > > Test set up: TX Flex 1500, 0.2 mw output, attenuators Bird and HP > 120 d= B, > min. step 1 dB, RX Flex 5000, Software Opera v.1.2.8 Windows 7 64. > > 73, Albert PA0A > > >