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=-0.7 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, 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 u6UBt52X023659 for ; Sat, 30 Jul 2016 13:55:06 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1bTSiN-0005wd-3f for rs_out_1@blacksheep.org; Sat, 30 Jul 2016 12:45:59 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1bTSiM-0005wU-DG for rsgb_lf_group@blacksheep.org; Sat, 30 Jul 2016 12:45:58 +0100 Received: from mout02.posteo.de ([185.67.36.66]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1bTSiK-0003pL-Sx for rsgb_lf_group@blacksheep.org; Sat, 30 Jul 2016 12:45:57 +0100 Received: from submission (posteo.de [89.146.220.130]) by mout02.posteo.de (Postfix) with ESMTPS id DB39420BB3 for ; Sat, 30 Jul 2016 13:45:54 +0200 (CEST) Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 3s1kLp1Y4yz104B for ; Sat, 30 Jul 2016 13:45:49 +0200 (CEST) Message-ID: <579C936D.9000901@posteo.de> Date: Sat, 30 Jul 2016 13:45:49 +0200 From: DK7FC User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <7601C251DD884ED6A87D1BDF96E3B0B9@AGB> <2597402C149045699CD01AE9C5EA0910@AGB> <0798598D6AE046FDBF08A4B77B611C63@AGB> <21D708FD1E864CAE8C37A899E724094B@AGB> <0BD9A5C737ED4C0D80A1AC7B31257519@AGB> <579BBC0C-8B46-40D7-B020-4FEFB3CAEBE4@talktalk.net> <842245F665864E8F81143313E4DB8F50@AGB> In-Reply-To: <842245F665864E8F81143313E4DB8F50@AGB> X-Scan-Signature: cc2e5baae40f8f7a09b47e6877ef0bfb Subject: LF: EbNaut: Which data rate is possible in which bandwidth? Content-Type: text/plain; charset=UTF-8; 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: 8471 Hi Paul, all, Today i'm going to start my experiment on 2970 Hz in abt 17 km distance. I will record to my 32 GB USB stick for 2 days. The antenna is a vertical loop, 4 turns of up to 100 m^2 each and a sound card powered NPN preamp. The plan is to run the carriier on 2970 (still active :-) ) and then do a frequency shift to get a better proof that it is my signal. On the second day i like to run an EbNaut transmission. Maybe 3 to 5 characters. But which symbol length is recommended? I don't knwo how to estimate it. Let's assume my signal is 3 dB SNR in 424 uHz. Which symbol length do you recommend if i want to decode the message savely? 73, Stefan