Return-Path: Received: from mtain-mb03.r1000.mx.aol.com (mtain-mb03.r1000.mx.aol.com [172.29.96.23]) by air-dc03.mail.aol.com (v129.4) with ESMTP id MAILINDC033-864f4d3c4130206; Sun, 23 Jan 2011 09:54:40 -0500 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mb03.r1000.mx.aol.com (Internet Inbound) with ESMTP id AA56D380000CA; Sun, 23 Jan 2011 09:54:39 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Ph1Jp-0000wo-Q6 for rs_out_1@blacksheep.org; Sun, 23 Jan 2011 14:53:29 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Ph1Jp-0000wf-78 for rsgb_lf_group@blacksheep.org; Sun, 23 Jan 2011 14:53:29 +0000 Received: from mail-iy0-f171.google.com ([209.85.210.171]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Ph1Jm-00042g-Q3 for rsgb_lf_group@blacksheep.org; Sun, 23 Jan 2011 14:53:29 +0000 Received: by iyj21 with SMTP id 21so3369022iyj.16 for ; Sun, 23 Jan 2011 06:53:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:date:message-id:subject:from:to :content-type; bh=vEOLt0+GWZ5t0fy0ITSO65pPnIBqL9y6JKWeftHho10=; b=MUXXFn6+Mi8NhPM5I50hzfvZGsGebKNI4+195lNc9z1RMGH0aJtLT10Nx4B4hmDRzp B4vYLNQbG4DpVCKcOgSYKTcCqmsLU+0zE34GH/09PzD3PDqcyd2Hpu0du05Z5hOLyt0W dfZ2lq7BWWQ3owhpnFBYMTVkATCJr+feubJaQ= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=Ao0JUtjmBJOpxxr9Fw3ZDr1IgAdV5neWG9O4fzez3l0caC9oM/zqhyGWvgT6YTZapM WBFJSRZl3BMQrGeUt7jarhXFoNQPzRVb7AyuIB/H8cZDRpXRfk0+N/45p86lPWn+yKnU H6PP7DJKeUUlJCoV+N6ut/3fHvALP3IBCvCxM= MIME-Version: 1.0 Received: by 10.231.15.133 with SMTP id k5mr3357739iba.187.1295794399665; Sun, 23 Jan 2011 06:53:19 -0800 (PST) Received: by 10.231.200.211 with HTTP; Sun, 23 Jan 2011 06:53:19 -0800 (PST) Date: Sun, 23 Jan 2011 14:53:19 +0000 Message-ID: From: Andy Talbot To: rsgb_lf_group@blacksheep.org DomainKey-Status: good (testing) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: LF: WSPR reports Content-Type: multipart/alternative; boundary=00032555f11ae4e05a049a84a45b 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=HTML_MESSAGE 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-AUTHENTICATION: mail_rly_antispam_dkim-d023.1 ; domain : gmail.com DKIM : fail x-aol-sid: 3039ac1d60174d3c412f2895 X-AOL-IP: 195.171.43.25 X-Mailer: Unknown (No Version) --00032555f11ae4e05a049a84a45b Content-Type: text/plain; charset=ISO-8859-1 G8HUH, monitoring WSPR... Your reports on Jim and myself seem to indicate an abnormally high S/N Are you in a very quiet location, or do you have a narrow CW filter selected? If the latter, WSPR reports are only valid when the input noise spectrum is absolutely flat over the 1400 - 1600Hz audio input range. If the bandwidth is any lower than 250Hz, S/N values become inflated as the WSPR decoding software cannot evaluate the full band of noise Andy www.g4jnt.com --00032555f11ae4e05a049a84a45b Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
G8HUH, monitoring WSPR...
=A0
Your reports on Jim and myself seem to=A0indicate an abnormally high= S/N
Are you in a very quiet location, or do you have a narrow CW filter= selected?
=A0
If the latter, WSPR reports are only valid when the input noise spect= rum is absolutely flat over the 1400 - 1600Hz audio input range.=A0=A0
If the bandwidth is any lower than 250Hz, S/N values become inflated= as the WSPR decoding software cannot evaluate the full band of noise
=A0
Andy
=A0
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