Return-Path: Received: (qmail 23337 invoked from network); 18 Jan 2002 14:45:31 -0000 Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 18 Jan 2002 14:45:31 -0000 Received: (qmail 25579 invoked from network); 18 Jan 2002 14:45:30 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior.services.quay.plus.net with SMTP; 18 Jan 2002 14:45:30 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 16Ra9r-0004Rt-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 18 Jan 2002 14:38:19 +0000 Received: from antiochus-fe0.ultra.net ([146.115.8.188]) by post.thorcom.com with esmtp (Exim 3.33 #2) id 16Ra9q-0004Ro-00 for rsgb_lf_group@blacksheep.org; Fri, 18 Jan 2002 14:38:18 +0000 Received: from comrex (209-122-234-143.s2207.apx2.sbo.ma.dialup.rcn.com [209.122.234.143]) by antiochus-fe0.ultra.net (8.8.8/ult/n20340/mtc.v2) with SMTP id JAA18243 for ; Fri, 18 Jan 2002 09:37:10 -0500 (EST) Message-ID: <000e01c1a02e$1b047020$09dc9384@ma.ultranet.com> From: "John Andrews" To: rsgb_lf_group@blacksheep.org References: <7D653C9C42F5D411A27C00508BF8803DCB995D@pdw-mail-r1.dstl.gov.uk> Subject: Re: LF: G0MRF/SM6LKM DDS VFO and Jason Date: Fri, 18 Jan 2002 09:40:11 -0500 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: Andy, > That's neat! But I make it 0.0083333 Hz resolution, (still OK nice value > though) and can't be locked to a 1PPS signal. Better still, use it with an > AD9851 chip using the x6 PLL multiplier for 50mHz steps. Good thought. My only real goal in this case was to have the divisor remain an integer down to 10 mHz intervals, as I was using an 8-bit controller with display and keypad. For the moment, calibration against a well-calibrated ARGO screen has been sufficient, but I would obviously need to tune the DDS to some "magic" frequency to use more accurate methods. John Andrews, W1TAG