Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dl03.r1000.mx.aol.com (Internet Inbound) with ESMTP id 062BE3800011B; Wed, 6 Mar 2013 17:39:51 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1UDLhL-0006Dn-Ls for rs_out_1@blacksheep.org; Wed, 06 Mar 2013 21:16:27 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1UDLhL-0006DO-6p for rsgb_lf_group@blacksheep.org; Wed, 06 Mar 2013 21:16:27 +0000 Received: from cpsmtpb-ews05.kpnxchange.com ([213.75.39.8]) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1UDLhJ-0000jD-AZ for rsgb_lf_group@blacksheep.org; Wed, 06 Mar 2013 21:16:25 +0000 Received: from cpsps-ews23.kpnxchange.com ([10.94.84.189]) by cpsmtpb-ews05.kpnxchange.com with Microsoft SMTPSVC(7.5.7601.17514); Wed, 6 Mar 2013 22:14:38 +0100 Received: from CPSMTPM-CMT108.kpnxchange.com ([195.121.3.24]) by cpsps-ews23.kpnxchange.com with Microsoft SMTPSVC(7.5.7601.17514); Wed, 6 Mar 2013 22:14:38 +0100 Received: from [192.168.2.13] ([62.131.23.134]) by CPSMTPM-CMT108.kpnxchange.com with Microsoft SMTPSVC(7.0.6002.18264); Wed, 6 Mar 2013 22:16:04 +0100 Message-ID: <5137B214.8070608@kpnmail.nl> Date: Wed, 06 Mar 2013 22:16:04 +0100 From: pa3abk User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:17.0) Gecko/20130215 Thunderbird/17.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <51378EC1.5030309@psk31.plus.com> <5137970B.6060600@iup.uni-heidelberg.de> In-Reply-To: <5137970B.6060600@iup.uni-heidelberg.de> X-OriginalArrivalTime: 06 Mar 2013 21:16:04.0587 (UTC) FILETIME=[CFA8D3B0:01CE1AAF] X-RcptDomain: blacksheep.org X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Thanks Eddie for the report. Didn't expect to be that errorfree over 400km :-) AMTOR-FEC speed is 100Bd, every character is send twice within a certain interval. There is also a checksum on every 7-unit character send which should have a ratio of 3:4. The ARQ version is even better, later software was developed in such that every repeat was overlayed on top of the previous one. So even under bad condx 3 or 4 repeats gives an errorfree print. [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [213.75.39.8 listed in list.dnswl.org] X-Scan-Signature: 3f8d74a8c70dd416d0a3a1dbcb9bb89f Subject: Re: LF: RTTY 478.xxx Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit 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-global-disposition: G x-aol-sid: 3039ac1d4ad15137c5b4775e X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : temperror Thanks Eddie for the report. Didn't expect to be that errorfree over 400km :-) AMTOR-FEC speed is 100Bd, every character is send twice within a certain interval. There is also a checksum on every 7-unit character send which should have a ratio of 3:4. The ARQ version is even better, later software was developed in such that every repeat was overlayed on top of the previous one. So even under bad condx 3 or 4 repeats gives an errorfree print. Assume that the shift of 85Hz can't be maintained in order to receive it "error free" considering the higher baudrate. But it's worth trying it out. At the mom 478.2 is somewhat stereophonic, many signals but can't decode any. Jan/pa3abk NNNN On 6-3-2013 20:20, Stefan Schäfer wrote: > Hello Eddie, > > Yes, very interesting. Jan/PA3ABK told me that AMTOR-FEC is the same > as NAVTEX. A quick google search and wikipedia check confirmed that > :-) NAVTEX is available in FLDIGI as well, which is fine :-) > I also installed Multipsk now and managed to decode my RTTY (from > Twente) even with that program. > > Now i would like to try NAVTEX. Will change to that mode now... > > 73, Stefan > > Am 06.03.2013 19:45, schrieb g3zjo: >> Hi LF >> >> I am continuing to test RTTY below 478.200 reports very welcome. >> >> PA3ABK came up very nicely in QSO with DK7FC. >> >> 73 Eddie G3ZJO > > -- pa3abk <-> dordrecht jo21it