Return-Path: Received: (qmail 29594 invoked from network); 24 Jul 2002 14:05:11 -0000 Received: from murphys.services.quay.plus.net (212.159.14.225) by mailstore with SMTP; 24 Jul 2002 14:05:11 -0000 Received: (qmail 26754 invoked from network); 24 Jul 2002 14:04:04 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from post.thorcom.com (193.82.116.70) by murphys.services.quay.plus.net with SMTP; 24 Jul 2002 14:04:04 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 17XMeH-0000OJ-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 24 Jul 2002 14:57:53 +0100 Received: from d06lmsgate-5.uk.ibm.com ([195.212.29.5]) by post.thorcom.com with esmtp (Exim 3.33 #2) id 17XMeG-0000OE-00 for rsgb_lf_group@blacksheep.org; Wed, 24 Jul 2002 14:57:52 +0100 Received: from d06relay01.portsmouth.uk.ibm.com (d06relay01.portsmouth.uk.ibm.com [9.166.84.147]) by d06lmsgate-5.uk.ibm.com (1.0.0) with ESMTP id OAA98382 for ; Wed, 24 Jul 2002 14:59:36 +0100 Received: from usa.net (ss9.bld.socks.ibm.com [9.14.4.75]) by d06relay01.portsmouth.uk.ibm.com (8.11.1m3/NCO/VER6.2) with ESMTP id g6ODvaQ59224 for ; Wed, 24 Jul 2002 14:57:36 +0100 Message-ID: <3D3EB1FD.1BF6F2AD@usa.net> Date: Wed, 24 Jul 2002 15:56:13 +0200 From: "Alberto di Bene" X-Mailer: Mozilla 4.79 [en] (Windows NT 5.0; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Jason code on DDS Module References: <7D653C9C42F5D411A27C00508BF8803DCB9B3B@mail.dstl.gov.uk> 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: > I was just going to use the generic Jason serial output, just the 8 bit > words taking on values 0 - 16 at 9600 baud. The PIC would calculate the > accumulator value for each tone by multiplying the received number by a > constant derived from the stored clock, then adding on the requested cenre > frequency. Ok, this means less work for me... :-) But if you need modifications to the format, they can be done. > Question... Is the nominal frequency of a Jason transmission the centre > frequency (Tone 8 ), or Tone 0 ? My understanding is the former, the centre > tone. But just checking. > [...] Tone 8 is the centre frequency, and is also the idle tone, transmitted when the input buffer is empty. 73 Alberto I2PHD