Return-Path: Received: (qmail 27916 invoked from network); 15 Jan 2002 16:34:02 -0000 Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 15 Jan 2002 16:34:02 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 15487 invoked from network); 15 Jan 2002 16:34:04 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior.services.quay.plus.net with SMTP; 15 Jan 2002 16:34:04 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 16QWSL-0003r2-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 15 Jan 2002 16:29:01 +0000 Received: from d06lmsgate-4.uk.ibm.com ([195.212.29.4]) by post.thorcom.com with esmtp (Exim 3.33 #2) id 16QWSJ-0003qn-00 for rsgb_lf_group@blacksheep.org; Tue, 15 Jan 2002 16:29:00 +0000 Received: from d06relay01.portsmouth.uk.ibm.com (d06relay01.portsmouth.uk.ibm.com [9.166.84.147]) by d06lmsgate-4.uk.ibm.COM (1.0.0) with ESMTP id QAA22568 for ; Tue, 15 Jan 2002 16:14:50 GMT Received: from usa.net (ss10.raleigh.ibm.com [9.37.2.197]) by d06relay01.portsmouth.uk.ibm.com (8.11.1m3/NCO v5.01) with ESMTP id g0FGR2s59896 for ; Tue, 15 Jan 2002 16:27:04 GMT Message-ID: <3C445863.4A1B59F5@usa.net> Date: Tue, 15 Jan 2002 17:27:15 +0100 From: "Alberto di Bene" X-Mailer: Mozilla 4.78 [en] (Windows NT 5.0; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Jason decode References: <000301c19ddb$131f46a0$a378073e@default> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Alan Melia wrote: > Hi Alberto, It occurs to me that to decode correctly we will need to be > listening on upper-sideband otherwise we will get a frequency translation of > the tones and thus an incorrect decode. Hi Alan, no, the coding scheme relies only on the absolute value of the frequency difference, so it's immaterial whether you are receiving LSB or USB... Could your failure to decode attributed to the same initial problem of Dave, i.e. CPU speed of the PC ? Until I produce a version a bit less CPU-hungry, I reckon you need at least a 500 MHz CPU when receiving. Dave did succeed when he switched from a 200 MHz PC to a 850 MHz one. But probably tomorrow I will have ready a slowed-down version... 73 Alberto I2PHD