Return-Path: Received: (qmail 1912 invoked from network); 27 Jan 2001 21:18:17 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 27 Jan 2001 21:18:17 -0000 Received: (qmail 20913 invoked from network); 27 Jan 2001 21:12:28 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 27 Jan 2001 21:12:28 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14McYt-0004E3-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 27 Jan 2001 21:07:07 +0000 Received: from mailman.zeta.org.au ([203.26.10.16]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14McYr-0004Dy-00 for rsgb_lf_group@blacksheep.org; Sat, 27 Jan 2001 21:07:06 +0000 Received: from steve (ppp174.dyn154.pacific.net.au [210.23.154.174]) by mailman.zeta.org.au (8.9.3/8.8.7) with SMTP id IAA01909 for ; Sun, 28 Jan 2001 08:06:50 +1100 Message-ID: <007101c088a5$89de4300$0301a8c0@steve> From: "Steve Olney" To: rsgb_lf_group@blacksheep.org References: <3.0.1.16.20010126155050.21d74c42@mail.cc.kuleuven.ac.be> Subject: LF: Re: Time efficient code Date: Sun, 28 Jan 2001 08:10:06 +1100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2314.1300 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: G'day Rick, > > Assume the transmission speed is 60 seconds dotlength. In that case the > time needed to transmit 'CQ ON7YD K' would take : > > 114 minutes in QRSS > 40 minutes in DFCW > 30 minutes in '7 tone mode' if we have a space between characters > 20 minutes in '7 tone mode' if we have no space between characters > 40 minutes in '4 tone mode' if we have a space between characters > 30 minutes in '4 tone mode' if we have no space between characters > And 10 minutes in FDK. I am working on an FDK modulator transmit/receive hardware/software package. Probably it will only be useful in the experimental US Part 15 band given the current climate in the UK. 73s Steve Olney (VK2ZTO/AXSO - QF56IK : Lat -33 34 07, Long +150 44 40) ============================================= HomePage URLs: http://www.qsl.net/vk2zto http://www.zeta.org.au/~ollaneg Containing:- ULF, ELF, VLF & LF Experimentation InfraSonic Experimentation Laser Comms DX Amateur Radio Astronomy =============================================