Return-Path: X-Spam-DCC: paranoid 1102; 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 tB7Dmtca029974 for ; Mon, 7 Dec 2015 14:48:55 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1a5w6a-0001I9-O2 for rs_out_1@blacksheep.org; Mon, 07 Dec 2015 13:45:28 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1a5w6a-0001Hw-Bg for rsgb_lf_group@blacksheep.org; Mon, 07 Dec 2015 13:45:28 +0000 Received: from parrot.netcom.co.uk ([217.72.171.49]) by relay1.thorcom.net with esmtp (Exim 4.86) (envelope-from ) id 1a5w5d-0005HQ-Ax for rsgb_lf_group@blacksheep.org; Mon, 07 Dec 2015 13:45:27 +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 2EC2F3273A5 for ; Mon, 7 Dec 2015 13:35:08 +0000 (GMT) Received: from [127.0.0.1] (localhost [127.0.0.1]) by sb.abelian.org (Postfix) with ESMTP id C80CF28A010B for ; Mon, 7 Dec 2015 13:44:12 +0000 (UTC) Message-ID: <56658D2C.3070304@abelian.org> Date: Mon, 07 Dec 2015 13:44:12 +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: <8D2FF0518E35807-3D0-4846D@webmail-vm171.sysops.aol.com> In-Reply-To: <8D2FF0518E35807-3D0-4846D@webmail-vm171.sysops.aol.com> X-Scan-Signature: 4e3b1488273adbbe9757d6bdd5adf219 Subject: Re: LF: EbNaut 137.777 8s 2c 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: 5642 Here I got 'NA' from the 02:00 message at Eb/N0 somewhere below -1.9 dB, BER 47.7%, uniform phase. Very weak because the rx is off while the battery charges and it is receiving only on the feeder or whatever leaks through the dead pre-amp. Nil from the other messages. Edgar wrote: > Have set-up to record using SL with 1.43051 mHz bin width, > 30 second waterfall interval. The signal is invisible on a spectrogram so you wont see anything. Also invisible on a spectrum unless it is a strong signal. Might be worth sending the recording 10:00:00 to 11:42:24 UT into the decoder for a try. Use a very large list size and check the log for 'NA' in amongst all the false decodes. If you find NA, then you get the carrier S/N in the log. You should try a 3 hour carrier and record that. Then plot spectra (not spectrogram) with bin widths between 100uHz and 300uHz, sampling from a range of time intervals. Hopefully there's a window in that 3 hour slot which will show a carrier spike and from its S/N we can work out if a BPSK message will decode. -- Paul Nicholson --