Return-Path: Received: (qmail 21640 invoked from network); 14 Nov 1999 13:45:01 +0000 Received: from unknown (HELO magnet.force9.net) (195.166.128.26) by guiness.force9.net with SMTP; 14 Nov 1999 13:45:01 +0000 Received: (qmail 21296 invoked from network); 14 Nov 1999 13:54:47 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by magnet.plus.net.uk with SMTP; 14 Nov 1999 13:54:47 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 11mzid-00082l-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 14 Nov 1999 13:29:23 +0000 X-Priority: 3 Received: from premium.inrete.it ([194.116.9.4] helo=mailer.inrete.it ident=root) by post.thorcom.com with esmtp (Exim 3.02 #1) id 11mzic-00082g-00 for rsgb_lf_group@blacksheep.org; Sun, 14 Nov 1999 13:29:22 +0000 X-MSMail-Priority: Normal Received: from cel266 ([151.20.80.190]) by mailer.inrete.it (8.8.8/8.8.8) with SMTP id OAA01868 for ; Sun, 14 Nov 1999 14:29:19 +0100 Message-ID: <3.0.3.32.19991114142857.009928d0@mailer.inrete.it> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Sender: spin@mailer.inrete.it X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.3 (32) Date: Sun, 14 Nov 1999 14:28:57 +0100 To: rsgb_lf_group@blacksheep.org From: "M. Bruno" Subject: Re: LF: Re: Question: Rotating Shift Encoder In-reply-to: <001401bf2e86$0d8e7b00$0600a8c0@main> References: <199911140337_MC2-8CFC-355C@compuserve.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: At 09.52 14/11/99 -0000, you wrote: >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")