Return-Path: Received: (qmail 2197 invoked from network); 25 May 2000 08:50:37 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by bells.core.plus.net.uk with SMTP; 25 May 2000 08:50:37 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 12utGE-0006bl-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 25 May 2000 09:44:58 +0100 Content-Transfer-Encoding: 8bit Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.02 #1) id 12utGA-0006bg-00 for rsgb_lf_group@blacksheep.org; Thu, 25 May 2000 09:44:54 +0100 Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id JAA01573; Thu, 25 May 2000 09:48:37 +0100 (BST) X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 20945 invoked from network); 25 May 2000 09:40:25 -0000 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 25 May 2000 09:40:25 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: by gauntlet.mail.dera.gov.uk; id JAA25300; Thu, 25 May 2000 09:41:35 GMT Received: from unknown(146.80.11.40) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma025290; Thu, 25 May 00 09:41:24 GMT Received: from frn-gold-1.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with ESMTP id ; Thu, 25 May 2000 09:50:09 +0100 Received: by frn-gold-1.dera.gov.uk with Internet Mail Service (5.0.1460.8) id ; Thu, 25 May 2000 09:43:42 +0100 Message-ID: <3617AC3245C2D1118A840000F805359C01AB8C68@pdw-mercury-1.dera.gov.uk> From: "Talbot Andrew" To: "'LF Group'" , "'KZY'" Subject: LF: DDS Board - Anyone interested ? Date: Thu, 25 May 2000 09:43:41 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.0.1460.8) Content-Type: text/plain; charset=iso-8859-1; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: I am considering bulk manufacture of a Printed Circuit Board for the AD9850 DDS chip. The design has already been tested and includes the DDS, output filter, voltage regulator and a 16F84 PIC. Resident software allows the DDS source to be controlled over an RS232 link from a PC with ASCII commands. This allows for control from a simple terminal programme as well as custom software for PSK/ FSK etc. There is no reason why different PIC software can't be used for keyboard / rotary encoder etc. Mostly surface mount (large 1206 components though) but conventional PIC in a socket for easy firmware changes. If there is enough interest I will go ahead with a PCB order. It is possible a company (see WWW.HF-INST.CO.UK ) may take the design on board and market as a complete signal source, but for now I will just get PCBs made if enough interest is shown. Not sure of the price, it depends on such things as quantity, how many plated through holes, delivery timescales and probably the phase of the Moon ! The DDS can be clocked with any frequency source desired. For LF I use a 5MHz input derived from a master reference which allows outputs up to 1.7 MHz with 0.001 Hz resolution, but any clock up to 120MHz (40 MHz maximum output) is useable. Anyone interested, please let me know so I can get an idea of whether it is worth going ahead with a commercial run. Andy G4JNT -- The Information contained in this E-Mail and any subsequent correspondence is private and is intended solely for the intended recipient(s). For those other than the recipient any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on such information is prohibited and may be unlawful.