Return-Path: Received: from rly-mf04.mx.aol.com (rly-mf04.mail.aol.com [172.20.29.174]) by air-mf08.mail.aol.com (v121_r4.4) with ESMTP id MAILINMF082-958495f78553d5; Sat, 03 Jan 2009 09:38:34 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-mf04.mx.aol.com (v121_r4.4) with ESMTP id MAILRELAYINMF046-958495f78553d5; Sat, 03 Jan 2009 09:38:15 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1LJ7dJ-0003Hv-5w for rs_out_1@blacksheep.org; Sat, 03 Jan 2009 14:37:45 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1LJ7dG-0003Hm-Gk for rsgb_lf_group@blacksheep.org; Sat, 03 Jan 2009 14:37:42 +0000 Received: from mail-bw0-f19.google.com ([209.85.218.19]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1LJ7dF-0002Hs-Dh for rsgb_lf_group@blacksheep.org; Sat, 03 Jan 2009 14:37:42 +0000 Received: by bwz12 with SMTP id 12so21891221bwz.4 for ; Sat, 03 Jan 2009 06:37:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to :subject:in-reply-to:mime-version:content-type :content-transfer-encoding:content-disposition:references; bh=shSjUsoJ7D3P/pc67QRx97QnjmSzoIwucEGkaBLOkGU=; b=trWkRTFYItt3vMQ7MkAYw49W7zdT2jrhb1/5Q09NNeyF665x2SDQMvvdIazJ9xMYLS nznx/x1BsHLYOYuYmg/XUx4U8MVJBQVB/nGddd/Xiez847uIt+zS2kM6nvnQduXgLQCW 8Neq2UFeyrbT5ObqdokJa5G5vTwmmlzsqWcgY= DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=message-id:date:from:to:subject:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references; b=x6TKO93EJSuMXLWoBP6CKVkqJen9JNDzI2xKKDfhy3Ti1pXa2xbXF8QWNiw1za2McE yiIR2CPdLA0oHVHBGsc6kkaqVKBfnclBIEiz1tqjiE1Zh3whQl4hb8Yc3BlTDAI0pNAd D4Ww3L3NbyQnDK3sMCS+Ki3Tj9mEhXcjlSdsc= Received: by 10.181.220.19 with SMTP id x19mr6338894bkq.66.1230993454139; Sat, 03 Jan 2009 06:37:34 -0800 (PST) Received: by 10.180.228.10 with HTTP; Sat, 3 Jan 2009 06:37:34 -0800 (PST) Message-ID: Date: Sat, 3 Jan 2009 14:37:34 +0000 From: "Andy Talbot" To: rsgb_lf_group@blacksheep.org In-Reply-To: <39FCEC3B8E014BF59CD4E7140D94B0BB@AGB> MIME-Version: 1.0 Content-Disposition: inline References: <285F98C95F064AA8B5B6C559814191EC@ns94d01ae4d850> <495DC9D3.8030901@online.fr> <495E22D1.5030805@mail.ru> <495E33DC.3060502@mail.ru> <495E5832.9000009@mail.ru> <23CE077F929444939EDA62569064E6E9@AGB> <00f001c96d13$ed597980$0301a8c0@mal769a60aa920> <39FCEC3B8E014BF59CD4E7140D94B0BB@AGB> X-Karma: 0: DomainKey-Status: good (testing) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: Re: Low power olivia beacon 503 khz cent freq Content-Type: text/plain; charset=ISO-8859-1 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 X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-m216.2 ; domain : googlemail.com DKIM : pass X-Mailer: Unknown (No Version) If you have a radio with adjustable CW mode like most SDRs, and the RA1792, its easier to use CW mode. Tune to the centre frequency of interest, set the filter appropriately and the BFO to the decoders preferred tone. For last nights listening, my SDR-IQ was set to CW mode, audio lower freq 400Hz, upper freq 1600Hz, BFO 1000Hz (You can set arbitrary upper/lower linits on the SSB filter as well on Spectravue), but guess who initially fell foul of seeing 503kHz specified and assumed it meant the same as the JT65A freq the other night. So, on seeing the tones not where they 'should' have been and re-reading the email post... Must get round to writing a WSPR PIC routine for the AD9852 DDS similar to my existing JT65 beacons. Andy G4JNT www.g4jnt.com 2009/1/3 Graham : > Tx bandwidth and out of band signals , > > Well after picking up the toys from around the cot and tidying up the baby > finally fell asleep ,silence finally ensued, a little familiarisation with > the way the radio works may help, just because the rx dial displays a > frequency out side the allocated band, doesn't actually mean the signal is > out side the band .. its all to do with filter shape factor and the > placement of the filter .... bit like dougle asking farther ted, are all the > cows in the field the same size as his little plastic toy one... no dougle, > this ones in your hand and those are far away , right ted came the quick > reply .from a still confused dougle . > > > -------------------------------------------------- > From: "mal hamilton" > Sent: Friday, January 02, 2009 7:54 PM > To: > Subject: LF: Re: Low power olivia beacon 503 khz cent freq > >> >> OM >> Your transmission is outside the band limit, spreading to 504.6 khz. >> I can see why OFCOM are concerned about stricter control concerning data >> mode bandwidth. >> g3kev >> >> ----- Original Message ----- From: "Graham" >> To: >> Sent: Friday, January 02, 2009 6:30 PM >> Subject: LF: Low power olivia beacon 503 khz cent freq >> >> >>> Olivia 1 khz x 32 tone >>> >>> centre frequency 503 khz >>> >>> tx mode usb >>> >>> power 30 watts tune signal >>> >>> Will send for next few hours >>> >>> Reports welcome >>> >>> >>> Graham >>> >>> >>> >>> >> >> >> >> -------------------------------------------------------------------------------- >> >> >> >> No virus found in this incoming message. >> Checked by AVG - http://www.avg.com >> Version: 8.0.176 / Virus Database: 270.10.2/1871 - Release Date: 1/1/2009 >> 5:01 PM >> >> >> > > > >> >> No virus found in this incoming message. >> Checked by AVG - http://www.avg.com >> Version: 8.0.176 / Virus Database: 270.10.2/1871 - Release Date: 1/1/2009 >> 17:01 >> > > >