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 tBAB67dH007832 for ; Thu, 10 Dec 2015 12:06:07 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1a6yy0-0004XX-DI for rs_out_1@blacksheep.org; Thu, 10 Dec 2015 11:00:56 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1a6yy0-0004XO-56 for rsgb_lf_group@blacksheep.org; Thu, 10 Dec 2015 11:00:56 +0000 Received: from parrot.netcom.co.uk ([217.72.171.49]) by relay1.thorcom.net with esmtp (Exim 4.86) (envelope-from ) id 1a6ywv-0000vj-Ur for rsgb_lf_group@blacksheep.org; Thu, 10 Dec 2015 11:00:54 +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 DEFBE3273EB for ; Thu, 10 Dec 2015 10:50:24 +0000 (GMT) Received: from [127.0.0.1] (localhost [127.0.0.1]) by sb.abelian.org (Postfix) with ESMTP id 9731228A0220 for ; Thu, 10 Dec 2015 10:59:33 +0000 (UTC) Message-ID: <56695B15.6010203@abelian.org> Date: Thu, 10 Dec 2015 10:59:33 +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: <56686FA0.4050707@gmail.com> In-Reply-To: X-Scan-Signature: 7001055fa59a9c23b9831ea6d317a074 Subject: Re: LF: LF EbNaut test from JN80 on 137370 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: 5716 Results of IZ7SLZ 16K21A 6C 2S 2015-12-09 18:00 no decode 19:00 Eb/N0 = 4.4 dB BER = 34.1% rank 0 ph uniform 20:00 Eb/N0 = 4.2 dB BER = 34.5% rank 0 ph 0 30 30 60 21:00 Eb/N0 = 3.5 dB BER = 35.5% rank 0 ph uniform 22:00 Eb/N0 = 7.5 dB BER = 27.8% rank 0 ph uniform 23:00 Eb/N0 = 7.1 dB BER = 28.8% rank 0 ph uniform 00:00 no further decodes Easy decodes with such a strong signal, weakest was about -48 dB S/N in 2.5kHz. Symbol timing is within 30mS. Andy wrote: > I discovered by trial and error The FreqOffset window in > EbNaut had ot be set to [minus] -3Hz to compensate for the > positive shift on the input - after spending a fruitless > few minutes trying at +3Hz . But I suppose this is the > same meaning and sign as the start time offset... It should have needed offset +3Hz. Following the principle of least surprise we would expect +3Hz to mean the signal is at +3Hz in the input! Maybe one of us needs to reverse the sign of the Q signal? -- Paul Nicholson --