Return-Path: Received: (qmail 24474 invoked from network); 14 Nov 1999 14:03:58 +0000 Received: from unknown (HELO magnus.force9.net) (195.166.128.27) by guiness.force9.net with SMTP; 14 Nov 1999 14:03:58 +0000 Received: (qmail 3706 invoked from network); 14 Nov 1999 14:02:52 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by magnus.plus.net.uk with SMTP; 14 Nov 1999 14:02:52 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 11n090-0008Lo-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 14 Nov 1999 13:56:38 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from ds-img-6.compuserve.com ([149.174.206.139] helo=spdmgaaf.compuserve.com) by post.thorcom.com with esmtp (Exim 3.02 #1) id 11n08z-0008Lj-00 for rsgb_lf_group@blacksheep.org; Sun, 14 Nov 1999 13:56:38 +0000 Received: (from mailgate@localhost) by spdmgaaf.compuserve.com (8.9.3/8.9.3/SUN-1.7) id IAA04416 for rsgb_lf_group@blacksheep.org; Sun, 14 Nov 1999 08:56:28 -0500 (EST) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Date: Sun, 14 Nov 1999 08:55:34 -0500 From: "'Geri' Kinzel, DK8KW" Subject: Re: LF: Re: Question: Rotating Shift Encoder To: rsgb_lf_group@blacksheep.org Message-ID: <199911140856_MC2-8D00-AFB7@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Disposition: inline Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello, thank you very much for the suggestions. I will try to play around with the 125 MHz clock of the AD9850, so let's see what I come up with. Best 73 Geri, DK8KW (W1KW) >Geri, > >>I am currently looking into a way how to realize a simple way of doing FSK >>with my DDS VFO. > >How about "VXO-ing" the clock oscillator? > >Dave G3YXM. > > >I was thinking the same way. You need 5 Hz out of 137 kHz, that is >about 36 ppm (parts per million). > >It is quite easy to shift an overtone crystal by this amount - use >a varicap, or a fixed cap switched by a transistor, or even a small >relay - orrendous, but the baud rate is so slow! > >And you need not to play with the encoder. > > >73 - Marco IK1ODO > >spin@inrete.it > >Rivalta, ITALY JN35SA (N 45 01' 25.6", E 7 31' 09.4")