Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-md03.r1000.mx.aol.com (Internet Inbound) with ESMTP id 7AB5C3800008B; Thu, 2 Feb 2012 16:33:31 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Rt43I-0002Pl-M9 for rs_out_1@blacksheep.org; Thu, 02 Feb 2012 21:18:44 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Rt43I-0002Pc-9k for rsgb_lf_group@blacksheep.org; Thu, 02 Feb 2012 21:18:44 +0000 Received: from mail-iy0-f171.google.com ([209.85.210.171]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Rt43F-0007oi-Rm for rsgb_lf_group@blacksheep.org; Thu, 02 Feb 2012 21:18:44 +0000 Received: by iaeh11 with SMTP id h11so6280995iae.16 for ; Thu, 02 Feb 2012 13:18:35 -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=gPgMmNmK1HaNK1qppKUelc5Zdl9j48sRSOd6/6oagJI=; b=ttn1kMao17IyMLNxsvEhrwkV1dB+ZcPVC6/KRj0iwyFxzO4J+KdraYijLAO6qbjqaJ G2e5EYSRFG6DeYdW86D+dPL7qojUa1xjqm2NZQ5fz21hxvRPoMJLAqCrw/wgqc3YOtZu d/VUQzYw4DTd4rPzdt+wHflyBiaSABqBPWkeM= MIME-Version: 1.0 Received: by 10.42.165.135 with SMTP id k7mr4871351icy.32.1328217515572; Thu, 02 Feb 2012 13:18:35 -0800 (PST) Received: by 10.231.12.140 with HTTP; Thu, 2 Feb 2012 13:18:35 -0800 (PST) In-Reply-To: References: <372EEAF266214ECDB1E430B737F510BA@GaryPC> Date: Thu, 2 Feb 2012 21:18:35 +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: RE: Opera weak signal Rx 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: 0:2:473026112:93952408 X-AOL-SCOLL-URL_COUNT: 0 X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-d277.1 ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1d60574f2b012b1e40 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Isn't -41dB about right for OP32? 8.192 seconds per symbol, =3D 0.122Hz, =3D 43dB down on 2500Hz. So +2dB on Noise bandwidth. Couple of dB low perhaps, but not far out 'jnt On 2 February 2012 21:06, Rik Strobbe wrote: > Gary, > > in the=A0little test I=A0did=A0earlier=A0today (sending=A0only the last 9= 6 bits) > I=A0noticed=A0that Opera=A0reported -38dB=A0while the=A0real=A0SNR was=A0= about +15dB. > I=A0assume=A0that the=A0SNR=A0value=A0gets wrong as a part of the bits=A0= get lost (eg. > QSB). > In=A0addition Opera=A0gives a=A04dB=A0lower=A0value=A0than WSPR. > The=A0combination=A0may=A0explain -41dB. > > 73, Rik=A0 ON7YD > > ________________________________ > Van: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.o= rg] > namens Gary G4WGT [g4wgt@tiscali.co.uk] > Verzonden: donderdag 2 februari 2012 21:59 > Aan: O_P_E_R_A_@yahoogroups.com; LF Group > Onderwerp: LF: Opera weak signal Rx > > Hi All, > > Amazing Opera=A0decode of weak signal at -41dB :- > > 20:38 136 UA4WPF de G4WGT Op32 3462 km -41 dB in IO83qo, nr Preston. > > 73, Gary - G4WGT.