Return-Path: Received: from rly-dd01.mx.aol.com (rly-dd01.mail.aol.com [172.19.141.148]) by air-dd03.mail.aol.com (v121_r4.4) with ESMTP id MAILINDD034-b5e49a0799d271; Sat, 21 Feb 2009 17:01:13 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-dd01.mx.aol.com (v121_r4.4) with ESMTP id MAILRELAYINDD018-b5e49a0799d271; Sat, 21 Feb 2009 17:01:03 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Laztx-0002l3-VF for rs_out_1@blacksheep.org; Sat, 21 Feb 2009 22:00:49 +0000 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Laztx-0002ku-I6 for rsgb_lf_group@blacksheep.org; Sat, 21 Feb 2009 22:00:49 +0000 Received: from vms173007pub.verizon.net ([206.46.173.7]) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Laztw-0004OF-3p for rsgb_lf_group@blacksheep.org; Sat, 21 Feb 2009 22:00:49 +0000 Received: from DR2 ([71.184.212.10]) by vms173007.mailsrvcs.net (Sun Java(tm) System Messaging Server 6.3-7.04 (built Sep 26 2008; 32bit)) with ESMTPA id <0KFF00JMSRSPQLDF@vms173007.mailsrvcs.net> for rsgb_lf_group@blacksheep.org; Sat, 21 Feb 2009 16:00:26 -0600 (CST) Message-id: <65DDE8D895964258B28E63F94F85512B@DR2> From: "dave.riley3" To: References: <20090221225111.lnqiykdjl20c84kc@webmail4.kuleuven.be> Date: Sat, 21 Feb 2009 17:00:24 -0500 MIME-version: 1.0 X-Priority: 3 X-MSMail-priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5512 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 X-Spam-Score: 3.4 (+++) X-Spam-Report: autolearn=disabled,FORGED_MUA_OUTLOOK=3.36 Subject: Re: LF: Ultra pico-low-power WSPR beacon Content-type: text/plain; format=flowed; charset=iso-8859-1; reply-type=response Content-transfer-encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.6 required=5.0 tests=FORGED_MUA_OUTLOOK autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-AOL-IP: 193.82.116.20 AA1A QSW UK WSPR QRSS window 503.900 +/- Last night saw strong CW beacon on 503.950 separated by long dash but was not able to copy ID by ear... TNX ----- Original Message ----- From: "Rik Strobbe" To: Sent: Saturday, February 21, 2009 4:51 PM Subject: Re: LF: Ultra pico-low-power WSPR beacon Andy, I am monitoring and uploading eventual spots. I will leave the RX / PC on overnight, so whoever want to give it a try ... 73, Rik ON7YD - OR7T Quoting Andy Talbot : > Just for a bit of novelty, I'm running probably the lowest power WSPR > signal seen on this band. Frequency 503.87kHz (set the usual USB > carrier 502.4) RF power is -2dBm, so ERP is in the region of -27dBm. > Duty cycle 33% (well, actually, 34.375%, but who's counting) > > Judging by some of the WSPR reports on my signal when runing 100 Watts > in the past, a few local stations may just be able to decode it. > > As for PN sequences, I admited defeat and just wrote down a series of > ones and zeros then played with them till they looked right and had > the correct numbers of each in a 32 bit pattern (which is why 33% and > 20% duty cycle values aren't spot-on) > On the assumptuin that its not random at all, why try to generate > other than by eye? > > Interesting to know Joe had a similar headache over this issue, Scott. > Clearly it isn't a 'mountain out of a molehill' problem after all. > > > Andy G4JNT > www.g4jnt.com > > Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm