Return-Path: X-Spam-DCC: paranoid 1233; Body=3 Fuz1=3 Fuz2=3 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-0.5 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_RCVD_HELO,RATWARE_GECKO_BUILD,SPF_PASS 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 u1TNAIbt007525 for ; Tue, 1 Mar 2016 00:10:18 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1aaWuN-0001yW-EB for rs_out_1@blacksheep.org; Mon, 29 Feb 2016 23:07:19 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1aaWuN-0001yN-5n for rsgb_lf_group@blacksheep.org; Mon, 29 Feb 2016 23:07:19 +0000 Received: from brian.netcom.co.uk ([217.72.171.64]) by relay1.thorcom.net with esmtp (Exim 4.86) (envelope-from ) id 1aaWuL-0005YE-Kx for rsgb_lf_group@blacksheep.org; Mon, 29 Feb 2016 23:07:18 +0000 Received: from sb.abelian.org (i-194-106-52-83.freedom2surf.net [194.106.52.83]) by brian.netcom.co.uk (Postfix) with ESMTP id 6B20F32008C for ; Mon, 29 Feb 2016 22:44:45 +0000 (GMT) Received: from [127.0.0.1] (localhost [127.0.0.1]) by sb.abelian.org (Postfix) with ESMTP id 3E71028A0227 for ; Mon, 29 Feb 2016 23:07:16 +0000 (UTC) Message-ID: <56D4CF24.7050609@abelian.org> Date: Mon, 29 Feb 2016 23:07:16 +0000 From: Paul Nicholson User-Agent: Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/20130106 Thunderbird/17.0.2 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <56D08BEF.7070708@abelian.org> <8D33ED4DA8562EE-14E0-601004@webmail-vm018.sysops.aol.com> <56D0934B.1040700@abelian.org> <56D098D3.80501@abelian.org> <56D0B22B.2020107@abelian.org> <56D0B58A.80908@tiscali.co.uk> <56D0C373.1090004@abelian.org> <56D0CC55.1060400@tele2.se> <56D0D587.7080309@abelian.org> <56D1DEAF.10202@abelian.org> <56D1FD5F.3010301@abelian.org> <56D2DA6D.20209@tele2.se> <56D326F1.1000102@abelian.org> <56D33297.9080209@abelian.org> <56D37529.9070607@abelian.org> <6732A7AB5E094156B6AE3A33E58A964F@White> <56D3875A.4060405@abelian.org> <4F4F6D69C89949808409DA43533DE43D@Clemens0811> <56D4C572.5040400@abelian.org> In-Reply-To: <56D4C572.5040400@abelian.org> X-Scan-Signature: e6de17d69e46ff4ea8db042ef2cd7e46 Subject: Re: LF: MF: EbNaut Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit 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 10.1.3.11 Status: O X-Status: X-Keywords: X-UID: 7143 Many thanks Markus and Domenico. I'm really pleased with that. I make that about 2022 km. A distance record for me! Maybe that is the farthest EbNaut on MF so far? My callsign decodes with Eb/N0 = -0.4 dB determined from the symbol errors and +1.0 dB from the carrier strength. Still some discrepancy there. Data from Markus shows invariably a lower Eb/N0 (higher BER) than suggested by the carrier S/N. The mode is not performing as good as it should, and the difference is expressed in the dB between the two columns > start car. sym. > 23:15 10.0 3.9 missing out on over 6dB there. The difference is caused by phase jitter if the carrier Eb/N0 is greater than the BER Eb/N0. The other way round would indicate some other nearby signal in the decoder input band. The question, is that jitter from my tx or is it propagation? The signal from EbSynth is good. I'm suspicious of the multiplier. I think I will have to make up another divider and divide the signal back down to audio frequency and compare with the reference. I have a nifty soundcard program for accurately comparing the phase of two signals of different frequencies. Now for a celebratory cup of tea. The signal stays on air until 00:00. -- Paul Nicholson --