Return-Path: X-Spam-DCC: paranoid 1233; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-1.4 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, NO_REAL_NAME autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id tB4K44hd012637 for ; Fri, 4 Dec 2015 21:04:04 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1a4wXI-0002IB-DT for rs_out_1@blacksheep.org; Fri, 04 Dec 2015 20:00:56 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1a4wXI-0002I2-5j for rsgb_lf_group@blacksheep.org; Fri, 04 Dec 2015 20:00:56 +0000 Received: from nina.ucs.mun.ca ([134.153.232.76]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.86) (envelope-from ) id 1a4wWJ-0001Xq-J1 for rsgb_lf_group@blacksheep.org; Fri, 04 Dec 2015 20:00:55 +0000 Received: from plato.ucs.mun.ca (plato.ucs.mun.ca [134.153.232.153]) by nina.ucs.mun.ca (8.13.1/8.13.1) with ESMTP id tB4Jxaki023040 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Fri, 4 Dec 2015 16:29:37 -0330 Date: Fri, 4 Dec 2015 16:29:36 -0330 (NST) From: jcraig@mun.ca X-X-Sender: jcraig@plato.ucs.mun.ca To: rsgb_lf_group@blacksheep.org In-Reply-To: <5661DD91.5070900@abelian.org> Message-ID: References: <8D2FC2AEF3A0D08-1488-1A0797@webmail-vd021.sysops.aol.com> <8D2FC914A8E0E4E-1038-20752A@webmail-vm010.sysops.aol.com> <56619CB7.4000501@abelian.org> <5661DD91.5070900@abelian.org> MIME-Version: 1.0 X-Scan-Signature: fc152e7304849b9a177649b85aea9f41 Subject: Re: LF: More EbNaut 137.777 - Dec. 3/4 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed 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-Scanned-By: MIMEDefang 2.56 on 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 5550 Hi Markus and Paul, Group, Thank-you for the reports. I'll try 0.2 s symbols, 131 characters tonight starting 2000. I's better get out and deal with the snow in the drive before it gets too dark. 73 Joe On Fri, 4 Dec 2015, Paul Nicholson wrote: > > A plot of the daytime correlation of I/Q against the > known encoded message > > http://abelian.org/vlf/tmp/151204a.gif > > shows significant spikes with each half-hour message, > up to 14:00. Only the first two decoded: > > 08:30 Eb/N0 = 2.7 dB > 09:00 Eb/N0 = 3.0 dB > > Judging from the size of the spikes the remaining daytime > messages were all at least 6dB weaker, that's 3dB or more > too weak to decode. > > My battery could be good for another night. No point > in repeating the same tests. Maybe try to max out the > capacity with 0.2 second symbols? Here I might get a 50% > decode rate with that setting. > > Or go for some DX with long symbols if there are listeners > further away? One hour messages perhaps instead of > half-hour? So far all LF tests have been less than 30 minutes > I think. One hour messages with an undisciplined oscillator > will make the phase search have to work harder. > > -- > Paul Nicholson > -- > >