Return-Path: X-Spam-DCC: paranoid 1290; 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=-0.5 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_RCVD_HELO,RATWARE_GECKO_BUILD 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 tAKC1VCU009974 for ; Fri, 20 Nov 2015 13:01:31 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ZzkJ6-0008BQ-C3 for rs_out_1@blacksheep.org; Fri, 20 Nov 2015 11:56:48 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1ZzkJ6-0008BH-3v for rsgb_lf_group@blacksheep.org; Fri, 20 Nov 2015 11:56:48 +0000 Received: from parrot.netcom.co.uk ([217.72.171.49]) by relay1.thorcom.net with esmtp (Exim 4.86) (envelope-from ) id 1ZzkI1-0003UL-St for rsgb_lf_group@blacksheep.org; Fri, 20 Nov 2015 11:56:46 +0000 Received: from sb.abelian.org (i-194-106-52-83.freedom2surf.net [194.106.52.83]) by parrot.netcom.co.uk (Postfix) with ESMTP id CE171327401 for ; Fri, 20 Nov 2015 11:46:48 +0000 (GMT) Received: from [127.0.0.1] (localhost [127.0.0.1]) by sb.abelian.org (Postfix) with ESMTP id 02FD428A010E for ; Fri, 20 Nov 2015 11:55:29 +0000 (UTC) Message-ID: <564F0A31.30604@abelian.org> Date: Fri, 20 Nov 2015 11:55:29 +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: <564E4046.9030602@gmail.com> <8D2F12F1F72FA45-156C-ECE7D@webmail-vm019.sysops.aol.com> In-Reply-To: <8D2F12F1F72FA45-156C-ECE7D@webmail-vm019.sysops.aol.com> X-Scan-Signature: 5c335215f1b3de26d890ee84d49616ce Subject: Re: LF: EbNaut LF test from iz7slz 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 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 5220 Domenico wrote: > transmission in progress (21:30 UT) is formed > by 39 characters at 0.5s. Sorry I was unable to decode this one. Tried list 100k with time offsets -0.1 to +0.9 in 0.02 second steps. My receiving system is not very good. You guys are doing much better because you have proper receivers. Here I am trying to use the same method that I use on VLF: direct reception through a soundcard, and it is just not working out very well. The only soundcard I have which will clock fast enough has a mono input which means I have to mix the PPS and LF together into the one input. That, and the card itself being quite noisy, makes it difficult to apply a precise time stamp to the signal samples. It is working, just not well enough and it looks like I'm losing a dB or two at least. It means I can't make accurate measurements of carrier phase and although we're getting some success with EbNaut messages, we cannot tell yet whether the band will support long distance long duration coherent signalling when the received signal is too weak to extract a reference phase. Hopefully someone better equipped will be able to measure the phase variations of a long T/A carrier. -- Paul Nicholson --