Return-Path: Received: from rly-dc08.mx.aol.com (rly-dc08.mail.aol.com [172.19.136.37]) by air-dc06.mail.aol.com (v125.7) with ESMTP id MAILINDC063-b364abb30a02cc; Thu, 24 Sep 2009 04:41:13 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-dc08.mx.aol.com (v125.7) with ESMTP id MAILRELAYINDC082-b364abb30a02cc; Thu, 24 Sep 2009 04:41:07 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Mqjs0-0003vf-Nq for rs_out_1@blacksheep.org; Thu, 24 Sep 2009 09:40:08 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Mqjs0-0003vW-B8 for rsgb_lf_group@blacksheep.org; Thu, 24 Sep 2009 09:40:08 +0100 Received: from moutng.kundenserver.de ([212.227.126.186]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Mqjqn-0006qc-56 for rsgb_lf_group@blacksheep.org; Thu, 24 Sep 2009 09:38:53 +0100 Received: from [192.168.1.64] (host86-177-29-128.range86-177.btcentralplus.com [86.177.29.128]) by mrelayeu.kundenserver.de (node=mreu0) with ESMTP (Nemesis) id 0LjfP2-1MFUIq2NDM-00boWV; Thu, 24 Sep 2009 10:39:52 +0200 From: "Dave Sergeant" To: rsgb_lf_group@blacksheep.org Date: Thu, 24 Sep 2009 09:39:52 +0100 MIME-Version: 1.0 Message-ID: <4ABB3058.9196.AE3C5E@dave.davesergeant.com> In-reply-to: <8bf118410909240118p602e589x4caf743a7e24eda9@mail.gmail.com> References: <250054929.177427.1253774595577.JavaMail.mail@webmail09>, , <8bf118410909240118p602e589x4caf743a7e24eda9@mail.gmail.com> X-mailer: Pegasus Mail for Windows (4.51) Content-description: Mail message body X-Provags-ID: V01U2FsdGVkX1+pveKEt59O86eM9jp5dhOBmIN0ge13+xDn8M8 mQnTyQL/jFvAanFP7ceT/w5OrpDmm76QLzKaVfO9g59IdUDpv+ uot7Wu/JOao/r+zOhzSZSpUGGqUP9VU X-Karma: unknown: X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: LF: Re: s/n shown by wspr .... what is it actually showing ? Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7BIT 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-IP: 193.82.116.20 In the ideal case of course you have just receiver noise as your background noise level. So you adjust your sound card input to give you the magic 0dB on that. During the night the static crash level will rise and push the S-meter to s9 at times. Every 15 minutes G4JNT will do its one minute of transmission on 503.7 at various power levels and push the little thing in the box well into the red. So one has to ask oneself what exactly the dB figures in reports really mean. The adjustment to 0dB will differ widely between different stations depending on what the noise level was at the time they adjusted it. And as pointed out, 0dB in WSPR with an SSB bandwidth (but only looking at 200Hz of it) usually implies a signal way over s9 in anybody's terms. End result, pay no attention to the figure other than a relative measure of any individual stations reception, or to monitor QSB. It certainly doesn't mean that a -30dB report is 30dB below audible copy... Anyway, I have now given up on WSPR for the moment. Any chance of another Wolf transmission before I disconnect the antenna? 73 Dave G3YMC On 24 Sep 2009 at 9:18, Dave Pick wrote: > opt-tee-mumish? These technical terms always confuse me.... > > ;-) Dave > > > 2009/9/24 Laurence BY3A-KL1X China > > > Red box means its either too low (or recommended level) or too high - > > if > > the box goes White its in the ballpark but Im told 0dB is > > opt-tee-mumish > > > > -- > G3YXM IO92BK Birmingham UK > http://www.davesergeant.com