Return-Path: Received: (qmail 17611 invoked from network); 20 Dec 2001 16:32:27 -0000 Received: from unknown (HELO murphys-inbound.services.quay.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 20 Dec 2001 16:32:27 -0000 Received: (qmail 18893 invoked from network); 20 Dec 2001 16:32:25 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys.services.quay.plus.net with SMTP; 20 Dec 2001 16:32:25 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 16H63z-0000uM-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 20 Dec 2001 16:28:55 +0000 Received: from fep01.swip.net ([130.244.199.129] helo=fep01-svc.swip.net) by post.thorcom.com with esmtp (Exim 3.33 #2) id 16H63x-0000uG-00 for rsgb_lf_group@blacksheep.org; Thu, 20 Dec 2001 16:28:53 +0000 Received: from oemcomputer ([212.151.13.10]) by fep01-svc.swip.net with SMTP id <20011220162805.GIRQ7380.fep01-svc.swip.net@oemcomputer> for ; Thu, 20 Dec 2001 17:28:05 +0100 Message-ID: <01a801c18973$58e91840$0a0d97d4@oemcomputer> From: "Johan Bodin" To: rsgb_lf_group@blacksheep.org References: <29BDD4F529FCD311B631009027357C4E0333C105@btss103a.swh.sk> Subject: LF: Re: DDS calibration... Date: Thu, 20 Dec 2001 17:27:34 +0100 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 6.00.2600.0000 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: Rich, >It's possible to save this calibration in EEPROM ? >Anybody knows how to do it ? Yes, I wrote the firmware... 1. If the CAL switch is held down at power-on, the default calibration value (corresponding to 25.0000... MHz clock) is loaded into EEPROM and the display will show "CAL=Default" for a few seconds. 2. If the CAL switch is pressed temporarily during operation, the software enters calibration mode and the calibration constant can be changed with the VFO knob. Just press the CAL switch again to store the new calibration in EEPROM and resume normal operation. If you see "CAL=Default" on the display every time you start the DDS, there is a problem with the CAL switch. The CAL switch should be a normally open momentary pushbutton that connects PIC pin 11 (RB5) to ground via a 470-820 ohm resistor. 73 de Johan SM6LKM