Return-Path: Received: (qmail 20697 invoked from network); 22 Jan 2002 12:26:39 -0000 Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 22 Jan 2002 12:26:39 -0000 Content-Transfer-Encoding: 8bit Received: (qmail 13211 invoked from network); 22 Jan 2002 12:26:39 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior.services.quay.plus.net with SMTP; 22 Jan 2002 12:26:39 -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 16Szwm-0005p5-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 22 Jan 2002 12:22:40 +0000 Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.33 #2) id 16Szwl-0005oz-00 for rsgb_lf_group@blacksheep.org; Tue, 22 Jan 2002 12:22:39 +0000 Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id MAA10226; Tue, 22 Jan 2002 12:31:43 GMT Received: (qmail 27386 invoked from network); 22 Jan 2002 13:10:29 -0000 Received: from gauntlet.mail.dstl.gov.uk (192.168.9.10) by baton.dstl.gov.uk with SMTP; 22 Jan 2002 13:10:29 -0000 Received: by gauntlet.mail.dstl.gov.uk; id MAA00207; Tue, 22 Jan 2002 12:39:28 GMT Received: from unknown(172.17.128.171) by gauntlet.mail.dstl.gov.uk via smap (3.2) id xma000189; Tue, 22 Jan 02 12:39:18 GMT Received: from FRN-MAIL-R3.dstl.gov.uk (unverified) by mailguard.dstl.gov.uk (Content Technologies SMTPRS 4.1.5) with ESMTP id for ; Tue, 22 Jan 2002 12:28:25 +0000 Received: by frn-mail-r3.dstl.gov.uk with Internet Mail Service (5.5.2650.21) id ; Tue, 22 Jan 2002 12:21:37 -0000 Message-ID: <7D653C9C42F5D411A27C00508BF8803DCB9968@pdw-mail-r1.dstl.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: LF: RE: Re: Radiated power Date: Tue, 22 Jan 2002 12:21:36 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) 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: >> Apparently HF Instruments have just sold their last unit. >They said the same to me, but they added that they have the AD9851 >model, which is an AD9850 plus an internal clock multiplier. And goes to 180MHz clock frequency rather than 120MHz for the AD9850. The driver PIC software for the DDS module defaults to Multiplier Off, so the 9851 can be used as a drop in replacement. I can supply a version of the PIC software that sets the x6 multiplier On if anyone wants this. As W1TAG pointed out, a US colour (or should that be color :-) subcarrier crystal at 3.579...MHz can be pulled to give 'nice' frequency steps. When used with the x6 multiplier option it will result in a clock frequency that gives a DDS step interval of exactly 0.05Hz 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.