Return-Path: Received: from rly-mg05.mx.aol.com (rly-mg05.mail.aol.com [172.20.83.111]) by air-mg09.mail.aol.com (v123.3) with ESMTP id MAILINMG092-a1649ba3c3b1cd; Fri, 13 Mar 2009 06:58:10 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-mg05.mx.aol.com (v123.3) with ESMTP id MAILRELAYINMG058-a1649ba3c3b1cd; Fri, 13 Mar 2009 06:58:06 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Li555-0001X4-3u for rs_out_1@blacksheep.org; Fri, 13 Mar 2009 10:57:35 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Li554-0001Wv-HM for rsgb_lf_group@blacksheep.org; Fri, 13 Mar 2009 10:57:34 +0000 Received: from mail-fx0-f174.google.com ([209.85.220.174]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Li551-0004Zp-KL for rsgb_lf_group@blacksheep.org; Fri, 13 Mar 2009 10:57:34 +0000 Received: by fxm22 with SMTP id 22so2627708fxm.4 for ; Fri, 13 Mar 2009 03:57:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:content-type; bh=hIEZvTN/PegvPia/mptFY3mhmJtwDF4D+oSFHmgOUnk=; b=uIr4tuSwp3Fy/q8v22qa8RxGrFPZgZOlGThejIGJx1qWNRV3G/YIvLH3kbJS9BQ2Bi IitLd4gUZhYBFsOguUn58T/3H7TKG2nJLwppV4y4ZZ4qSN2rOwgPnRuyXgnqrNGx/L6c 3DedDGn0WfdZ/Keg2VEobmbkpyoe6nVUXWgWg= DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=ODRR6fYI8mvZp2MBy2aaFTUd/a94/h9eNvhd5+Gn7sLYwyXY7RhMQMplaEXd9rUmn/ Mg+NKpiB4RU3id1cUAmThtsJfaTtkETdESOucQGeHPNYYgDTiqCKy216QKZqYAmPuaRJ dCUujAO2tSUnWeSkVHX8TGDkrw0VkBbMmSgsM= MIME-Version: 1.0 Received: by 10.204.118.142 with SMTP id v14mr332815bkq.37.1236941843431; Fri, 13 Mar 2009 03:57:23 -0700 (PDT) In-Reply-To: References: Date: Fri, 13 Mar 2009 10:57:23 +0000 Message-ID: From: Andy Talbot To: rsgb_lf_group@blacksheep.org, uk_beacons@yahoogroups.com X-Karma: unknown: DomainKey-Status: good (testing) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: LF: Re: Multi-function beacon Content-Type: multipart/alternative; boundary=0016e6d99bef2f80860464fdf70c X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=HTML_MESSAGE 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 X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-m234.1 ; domain : googlemail.com DKIM : fail X-Mailer: Unknown (No Version) --0016e6d99bef2f80860464fdf70c Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Just a reminder to all - this beacon is still going, and will probably continue to do so until further notice. A few listeners have downloaded the software, and thanks to all (you know who your are :-) for the plots / listings. I am not in a position to compile them, so don't expect revelations, but Gerhard / DK6NI has been monitoring pretty well continuously, and has plotted some deep fades / enhancements measured over hours with depths in the regions of 30dB. Are there any stations in the US in a position to monitor ? Please note that if using the recommended 5meg beacon monitoring software you'll either have to set the delta time to -240 (or -180 or -120) seconds or adjust the PC clock by two, three or four minutes to cope with the four minute offset I'm running it on. Andy G4JNT www.g4jnt.com 2009/3/6 Andy Talbot > I've now started transmitting a timed beacon signal on 503.7kHz that > is identical in format to that of GB3SSS operated over the winter months of > the last two years from Poldhu on 1.9 and 3.5MHz, and has a similar signal > structure to the 5MHz beacons, GB3RAL, WES and ORK. These all have an > initial CW ident and stepped power levels for aural reception, and a > precisely defined period of full-power plain carrier for S/N measurements. > See http://www.rsgb-spectrumforum.org.uk/5mhz%20beacons.htm for the > complete 5MHz signal structure. For this MF transmission, as on GB3SSS, > the pulsed sounder sequence of the 5MHz beacons is replaced with a PSK31 > message which lasts from 30s to approx 48 seconds after the start > > Auto Monitoring software writen by G3PLX is available for monitoring > these beacons, it measures signal to noise during the carrier period and > saves to file as well as plotting the last 40 hours worth of measurements. > The software can be downloaded from > http://www.rsgb.org/spectrumforum/hf/beaconauto.php . PSK31 data can be > copied with Digipan, Fldigi, PSK31SBW or a host of other packages. > > *TIMING * > The 503.7kHz transmission takes place every 15 minutes at 4 minutes past > the quarter hour. > ie each transmission starts at *xx:04, xx:19, xx:34 and xx:49 * This > time slot has been selected so that the transmission do not interfere with > my continuous ongoing reception of the 5Mhz beacons - the active antenna > used for these is overloaded by the 500kHz signal and I have already lost > data when the WSPR beacon transmission coincided with one of the monitoring > windows. > > NOTE If using the G3PLX software, this only monitors for the three 5MHz > beacons at 00, 01 and 02 minutes. > *SO IT WILL BE NECESSARY TO FRIG THE SOFTWARE * to monitor > this transmission at the 04 minute point. The necessary alteration can be > done by firstly setting your PC clock accurately to the correct time, then > setting the Track Time box to -240 (minus 240 seconds). This will make the > software look for this transmission during the time window it thinks it > would be receiving GB3RAL, and log the MF transmission during the first > minute, on the red trace, as if it were GB3RAL > > The beacon uses the identical hardware to the WSPR transmissions of the > last few weeks, with the the only change being a reprogramming of the > controller PIC. In fact the very same hardware was previously loaned to > the Poldhu club for their beacons, with the only difference being a change > to the final Low Pass filter on the output of the broadband PA. > > > > --0016e6d99bef2f80860464fdf70c Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Just a reminder to all - this beacon is still going, and will probably=20= continue to do so until further notice.=A0=A0 A few listeners have downloade= d the software, and thanks to all (you know who your are :-) for the plots /= listings.=A0=A0 I am not in a position to compile them, so don't expect= revelations, but Gerhard=A0 /=A0 DK6NI has been monitoring pretty well=A0co= ntinuously, and has plotted some=A0deep fades / enhancements measured over h= ours with depths in the regions of 30dB.
=A0
Are there any stations in the US in a position to monitor ?=A0=A0
=A0
Please note that if using the recommended 5meg beacon monitoring softwa= re you'll either have to set the delta time to -240 (or -180 or -120) se= conds or adjust the PC clock by two, three or four minutes to cope with the=20= four minute offset I'm running it on.
=A0
Andy =A0G4JNT
2009/3/6 Andy Talbot <andy.g4jnt@googlema= il.com>
I've now=A0started transmitting a timed=A0 beacon signal on 503.7kH= z that is=A0identical in format to that of GB3SSS operated over the winter m= onths of the last two years=A0=A0from Poldhu on 1.9 and 3.5MHz, =A0and has= =A0a similar signal structure to the 5MHz beacons, GB3RAL, WES and ORK.=A0 T= hese all have=A0an initial CW ident and=A0stepped power levels for aural rec= eption,=A0and a precisely defined period of full-power plain carrier for S/N= measurements.=A0=A0
See=A0 =A0http://www.rsgb-spectrumforum.org.uk/5mhz%20beacons= .htm=A0 for the complete 5MHz =A0signal structure.=A0=A0For this MF tran= smission, as on GB3SSS, the pulsed sounder sequence of the 5MHz beacons is r= eplaced with a PSK31 message which lasts from=A030s to approx 48 seconds aft= er the start
=A0
Auto Monitoring software writen by G3PLX is available for monitoring th= ese beacons, it measures signal to noise during the carrier period and saves= to file as well as plotting the last 40 hours worth of measurements.
The software can be downloaded from=A0 http://www.rsgb.org/spectr= umforum/hf/beaconauto.php=A0.=A0=A0 PSK31 data can be copied with Digipa= n, Fldigi, PSK31SBW or a host of other packages.
=A0
TIMING
The 503.7kHz transmission takes place every 15 minutes at 4 minutes pas= t the quarter hour.=A0
ie=A0each transmission starts at xx:04, xx:19, xx:34 and xx:49= =A0=A0=A0=A0This time slot has been selected so that the transmissi= on do not interfere with my continuous ongoing reception of the 5Mhz beacons= - the active antenna used for these is overloaded by the 500kHz signal and=20= I have already lost data when the WSPR beacon transmission coincided with on= e of the monitoring windows.
=A0
NOTE=A0=A0 If using the=A0G3PLX software, this only=A0monitors for the=20= three 5MHz beacons at =A000, 01 and 02 minutes.
SO IT WILL BE NECESSARY=A0TO FRIG=A0THE SOFTWARE =A0to= monitor this=A0transmission at the 04 minute point.=A0=A0=A0The necessary a= lteration can be done by firstly setting=A0your PC clock accurately to the c= orrect time, then setting the Track Time box to -240 (minus 240 seconds)..= =A0 This will make the software look for this transmission during the time= =A0window it thinks it would be receiving GB3RAL, and log the=A0MF transmiss= ion during the first minute, on the red trace, as if it were GB3RAL=A0
=A0
The beacon uses the identical hardware to the=A0WSPR transmissions of= =A0the last few weeks, with the the only change being a=A0reprogramming of t= he controller PIC.=A0=A0 In fact the very same hardware was previously loane= d to the Poldhu club for their beacons, with the only difference being a cha= nge to the final Low Pass filter on the output of the broadband PA.
=A0

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