Return-Path: Received: (qmail 5203 invoked from network); 5 Jan 2002 18:17:32 -0000 Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 5 Jan 2002 18:17:32 -0000 Received: (qmail 1053 invoked from network); 5 Jan 2002 18:17:34 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior.services.quay.plus.net with SMTP; 5 Jan 2002 18:17:34 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 16MvLr-0007Ve-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 05 Jan 2002 18:15:27 +0000 Received: from smtp-1.visp.telinco.net ([212.1.130.1]) by post.thorcom.com with esmtp (Exim 3.33 #2) id 16MvLq-0007VZ-00 for rsgb_lf_group@blacksheep.org; Sat, 05 Jan 2002 18:15:26 +0000 Received: from [212.1.152.10] (helo=g4jnt) by smtp-1.visp.telinco.net with smtp (Exim 3.32 #1) id 16MvFU-0007ED-00 for rsgb_lf_group@blacksheep.org; Sat, 05 Jan 2002 18:08:53 +0000 Message-ID: <001701c19614$d7d72cc0$0a9801d4@g4jnt> From: "Andrew Talbot" To: "LF Group" Subject: LF: Coherent PSK Test transmission Date: Sat, 5 Jan 2002 18:14:36 -0000 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 4.72.3110.1 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: I will be radiating a low power (about 4 watts RF, 1mW ERP) test transmission this evening (Saturday) using 30s BPSK with the transitions locked to GPS plus a few microseconds. The data sequence is 8 bits long and synchronised to the hour, repeating every 4 minutes. The exact frequency is 136718.25Hz (to do with DDS resolution using a 5MHz clock). Accuracy is within 3*10^-10 which means that during the 4 minute sequence interval, absolute phase should drift by no more than 4 degrees. No prize, but kudos, to the first person to work out the data sequence. To resolve the phase ambiguity problem, assume the first bit sent at the reference point is a '0' Andy G4JNT