Return-Path: Received: from rly-db09.mx.aol.com (rly-db09.mail.aol.com [172.19.130.84]) by air-db09.mail.aol.com (v123.3) with ESMTP id MAILINDB091-ae649b1188e142; Fri, 06 Mar 2009 07:35:40 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-db09.mx.aol.com (v123.3) with ESMTP id MAILRELAYINDB094-ae649b1188e142; Fri, 06 Mar 2009 07:35:30 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1LfZGP-000337-P6 for rs_out_1@blacksheep.org; Fri, 06 Mar 2009 12:34:53 +0000 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1LfZGM-00032y-SJ for rsgb_lf_group@blacksheep.org; Fri, 06 Mar 2009 12:34:50 +0000 Received: from smtp5.freeserve.com ([193.252.22.151] helo=smtp6.freeserve.com) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1LfZGL-0006yt-4p for rsgb_lf_group@blacksheep.org; Fri, 06 Mar 2009 12:34:50 +0000 Received: from me-wanadoo.net (localhost [127.0.0.1]) by mwinf3503.me.freeserve.com (SMTP Server) with ESMTP id C1B7A7000084 for ; Fri, 6 Mar 2009 13:34:43 +0100 (CET) Received: from AGB (unknown [91.109.23.203]) by mwinf3503.me.freeserve.com (SMTP Server) with SMTP id 4AAE67000081 for ; Fri, 6 Mar 2009 13:34:43 +0100 (CET) X-ME-UUID: 20090306123443305.4AAE67000081@mwinf3503.me.freeserve.com Message-ID: <0566EF6DE20B4249A3E74859BF9BA2C6@AGB> From: "Graham" To: References: In-Reply-To: Date: Fri, 6 Mar 2009 12:34:42 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8064.206 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8064.206 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: Multi-function beacon Content-Type: multipart/alternative; boundary="----=_NextPart_000_002E_01C99E57.ECA37B10" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.6 required=5.0 tests=HTML_20_30,HTML_MESSAGE, MISSING_OUTLOOK_NAME 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 ------=_NextPart_000_002E_01C99E57.ECA37B10 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Andy, Quick Q .. is the reception software capable of auto reporting to the 5 me= g group ? I have an idea it has this facility .or at least produces a -5 meg- report=20= file . if so can it be turned off ? G ..=20 From: Andy Talbot=20 Sent: Friday, March 06, 2009 11:03 AM To: rsgb_lf_group@blacksheep.org=20 Cc: jfell@tesco.net=20 Subject: LF: Multi-function beacon I've now started transmitting a timed beacon signal on 503.7kHz that is ide= ntical in format to that of GB3SSS operated over the winter months of the la= st two years from Poldhu on 1.9 and 3.5MHz, and has a similar signal struc= ture 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. =20 See http://www.rsgb-spectrumforum.org.uk/5mhz%20beacons.htm for the compl= ete 5MHz signal structure. For this MF transmission, as on GB3SSS, the pul= sed sounder sequence of the 5MHz beacons is replaced with a PSK31 message wh= ich lasts from 30s to approx 48 seconds after the start Auto Monitoring software writen by G3PLX is available for monitoring these b= eacons, it measures signal to noise during the carrier period and saves to f= ile as well as plotting the last 40 hours worth of measurements. The software can be downloaded from http://www.rsgb.org/spectrumforum/hf/be= aconauto.php . PSK31 data can be copied with Digipan, Fldigi, PSK31SBW or=20= a host of other packages. TIMING=20 The 503.7kHz transmission takes place every 15 minutes at 4 minutes past the= quarter hour. =20 ie each transmission starts at xx:04, xx:19, xx:34 and xx:49 This time sl= ot has been selected so that the transmission do not interfere with my conti= nuous ongoing reception of the 5Mhz beacons - the active antenna used for th= ese 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 be= acons at 00, 01 and 02 minutes. SO IT WILL BE NECESSARY TO FRIG THE SOFTWARE to monitor this transmission a= t the 04 minute point. The necessary alteration can be done by firstly set= ting your PC clock accurately to the correct time, then setting the Track Ti= me box to -240 (minus 240 seconds). This will make the software look for th= is transmission during the time window it thinks it would be receiving GB3RA= L, and log the MF transmission during the first minute, on the red trace, as= if it were GB3RAL=20 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 c= lub for their beacons, with the only difference being a change to the final=20= Low Pass filter on the output of the broadband PA. Andy G4JNT www.g4jnt.com ----------------------------------------------------------------------------= ---- No virus found in this incoming message. Checked by AVG - www.avg.com=20 Version: 8.0.237 / Virus Database: 270.11.8/1985 - Release Date: 03/05/09 07= :54:00 ------=_NextPart_000_002E_01C99E57.ECA37B10 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Andy,
 
Quick Q .. is the  reception software=20= capable=20 of auto reporting to the  5 meg group ?
 
I have an idea it has this  facility .= or at=20 least produces a -5 meg- report file . if so can it be turned off=20 ?
 
 
G ..

Sent: Friday, March 06, 2009 11:03 AM
Subject: LF: Multi-function beacon

I've now started transmitting a timed  beacon signal on 503.7= kHz=20 that is identical in format to that of GB3SSS operated over the winter=20 months of the last two years  from Poldhu on 1.9 and 3.5MHz,  = ;and=20 has a similar signal structure to the 5MHz beacons, GB3RAL, WES and=20 ORK.  These all have an initial CW ident and stepped power le= vels=20 for aural reception, and a precisely defined period of full-power plain= =20 carrier for S/N measurements.  
See   http://www.rsgb-spectrumforum.org.uk/5mhz%20beacons.htm&n= bsp;=20 for the complete 5MHz  signal structure.  For this MF=20 transmission, as on GB3SSS, the pulsed sounder sequence of the 5MHz beacons=20= is=20 replaced with a PSK31 message which lasts from 30s to approx 48 seconds= =20 after the start
 
Auto Monitoring software writen by G3PLX is available for monitoring th= ese=20 beacons, it measures signal to noise during the carrier period and saves to=20= file=20 as well as plotting the last 40 hours worth of measurements.
The software can be downloaded from  http://www.rsgb.org/spectrumforum/hf/be= aconauto.php .  =20 PSK31 data can be copied with Digipan, Fldigi, PSK31SBW or a host of other=20 packages.
 
TIMING
The 503.7kHz transmission takes place every 15 minutes at 4 minutes pas= t=20 the quarter hour. 
ie each transmission starts at xx:04, xx:19, xx:34 and=20 xx:49    This time slot has been selected so th= at=20 the transmission do not interfere with my continuous ongoing reception of th= e=20 5Mhz beacons - the active antenna used for these is overloaded by the 500kHz= =20 signal and I have already lost data when the WSPR beacon transmission coinci= ded=20 with one of the monitoring windows.
 
NOTE   If using the G3PLX software, this only monit= ors=20 for the three 5MHz beacons at  00, 01 and 02 minutes.
SO IT WILL BE NECESSARY TO FRIG THE SOFTWARE=20  to monitor this transmission at the 04 minute=20 point.   The necessary alteration can be done by firstly=20 setting your PC clock accurately to the correct time, then setting the=20 Track Time box to -240 (minus 240 seconds).  This will make the softwar= e=20 look for this transmission during the time window it thinks it would be= =20 receiving GB3RAL, and log the MF transmission during the first minute,=20= on=20 the red trace, as if it were GB3RAL 
 
The beacon uses the identical hardware to the WSPR transmissions=20 of the last few weeks, with the the only change being a reprogramm= ing=20 of the controller PIC.   In fact the very same hardware was previo= usly=20 loaned to the Poldhu club for their beacons, with the only difference being=20= a=20 change to the final Low Pass filter on the output of the broadband PA.
 
Andy  G4JNT


No virus found in this incoming message.
Checked by AVG -=20 www.avg.com
Version: 8.0.237 / Virus Database: 270.11.8/1985 - Release D= ate:=20 03/05/09 07:54:00
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