Return-Path: Received: from rly-de07.mx.aol.com (rly-de07.mail.aol.com [172.19.170.143]) by air-de01.mail.aol.com (v123.3) with ESMTP id MAILINDE012-4e849b181b92f4; Fri, 06 Mar 2009 15:04:23 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-de07.mx.aol.com (v123.3) with ESMTP id MAILRELAYINDE071-4e849b181b92f4; Fri, 06 Mar 2009 15:04:11 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1LfgGV-0000XD-MT for rs_out_1@blacksheep.org; Fri, 06 Mar 2009 20:03:27 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1LfgGV-0000X4-4z for rsgb_lf_group@blacksheep.org; Fri, 06 Mar 2009 20:03:27 +0000 Received: from smtp5.freeserve.com ([193.252.22.151] helo=smtp6.freeserve.com) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1LfgGT-00028D-SN for rsgb_lf_group@blacksheep.org; Fri, 06 Mar 2009 20:03:27 +0000 Received: from me-wanadoo.net (localhost [127.0.0.1]) by mwinf3526.me.freeserve.com (SMTP Server) with ESMTP id 89EDA1C00085 for ; Fri, 6 Mar 2009 21:03:17 +0100 (CET) Received: from AGB (unknown [91.109.23.203]) by mwinf3526.me.freeserve.com (SMTP Server) with SMTP id 0D0601C00084 for ; Fri, 6 Mar 2009 21:03:16 +0100 (CET) X-ME-UUID: 20090306200317535.0D0601C00084@mwinf3526.me.freeserve.com Message-ID: From: "Graham" To: References: <0566EF6DE20B4249A3E74859BF9BA2C6@AGB> <9C03FBF153AB478A9B0DBC5580CF20D2@AGB> In-Reply-To: Date: Fri, 6 Mar 2009 20:03:15 -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-Karma: unknown: 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_00B3_01C99E96.9661E1D0" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.9 required=5.0 tests=HTML_30_40,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_00B3_01C99E96.9661E1D0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Ok Andy=20 Seeing a good signal from your beacon, game on !. Well ... if the reports are sent to the 5 meg system , that may cause (more)= confusion .... but there is a need to produce some experimental data from=20= the allocation, this may be more 'tangible' than the wspr reports .... as=20= the beacon is running , I will splash this in the usual news groups , I wi= ll add a note asking for the log files to be retained and not emailed to t= he 5 meg system !=20 http://groups.google.com/group/uk500khz/web/multi-function-beacon-by-andy-g4= jnt Tnx- G ..=20 Nb the pulse width , 500uS .. that's a bit sharp for a ssb filter , only= 1.5 cycles at 3 Khz ... ? From: Andy Talbot=20 Sent: Friday, March 06, 2009 3:56 PM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: LF: Multi-function beacon Hi Graham -=20 I'm not bothered about log files myself as I don't have the time to collate= massses of data but if someone else feels they'd like to do it... Haven't hought about how long it will go for, I may just forget about it sho= ved up in the corner of the garage where, if it catches fire, all damage wil= l be contained, so happy enough running 24/7 for now. The 5MHz monitoring=20= system is in there as well. As for your questions on the pulsed part of the wavefom; its not in use on=20= this transmission , I replaced it with a PSK31 message instead. The origin= al 5MHz system used a pulse width of 500us at a PRF of 40Hz, with the idea o= f using an SSB reception bandwidth, so something coul dbe done with SSB Tx,=20= but these days we'd probably go another direction with PSK and a PN sequence= rather than a simple short pulse. Andy G4JNT www.g4jnt.com 2009/3/6 Graham Ok Andy, Obvious question, hi,=20 How long are you thinking of running the beacon and where do you want=20= the report files to be sent ? There may be quite a few records generated in a short time, I note from th= e last 'hfc' that there is quite a backlog of data from the 5 meg operatio= n but there is movement to analyse the data. should prove interesting .. =20 How aggressive is the pulsed section of the tx cycle,?, I know there is s= ome interest in using that facility for study's on 500, but as yet I have no= t found the rise/fall and timing parameters. dose it need to be a pulse or= could a small frequency shift be used if time is being measured ? Tnx- G ..=20 ----------------------------------------------------------------------------= ---- 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_00B3_01C99E96.9661E1D0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Ok Andy
 
Seeing a good signal from your beacon, game= on=20 !.
 
Well ... if the reports are sent to the 5 m= eg=20 system , that may cause (more) confusion .... but there is a need to =20 produce some experimental data from the  allocation, this may be more=20 'tangible'  than the wspr reports .... as the  beacon is runn= ing=20 ,  I will splash this in the usual n= ews=20 groups , I will add a note asking for the  log files to  be retain= ed=20 and not emailed to the 5 meg system !
 
 
Tnx- G ..
 
 
 
Nb   the  pulse width , 500uS ...= that's a=20 bit  sharp for a ssb filter , only  1.5 cycles at 3 Khz ...=20 ?
 
 
 

Sent: Friday, March 06, 2009 3:56 PM
Subject: Re: LF: Multi-function beacon

Hi Graham -
I'm not bothered about log files myself as  I don't have the time=20= to=20 collate massses of data but if someone else feels they'd like to do it...
 
Haven't hought about how long it will go for, I may just forget about i= t=20 shoved up in the corner of the garage where, if it catches fire, all da= mage=20 will be contained,  so happy enough running 24/7 for=20 now.  The 5MHz monitoring system is in there as well.
 
As for your questions on the pulsed part of the wavefom;  its not=20= in=20 use on this transmission , I replaced it with a PSK31 message=20 instead.   The original 5MHz system used a pulse width of 500us at= a=20 PRF of 40Hz, with the idea of using an SSB reception bandwidth, so something= =20 coul dbe done with SSB Tx, but these days we'd probably go another direction= =20 with PSK and a PN sequence rather than a simple short pulse.

Andy  G4JNT
www.g4jnt.com


2009/3/6 Graham <g8fzk@g8fzk.fsnet.co.uk&g= t;
Ok Andy,
 
Obvious question, hi,
 
How long are you  thinking of runnin= g=20 the  beacon and where do  you  want the report files to&nbs= p;=20 be sent ?
 
There may be quite a few records generate= d in a=20 short time, I note from the last 'hfc'=20= that=20 there is quite a backlog of data from the  5  meg operation but=20 there is movement
to analyse the  data. should prove=20 interesting ..  
 
How aggressive is the pulsed section of t= he =20 tx cycle,?, I know there is some interest in using that facility for study= 's=20 on 500, but as yet I have not  found the rise/fall and timing paramet= ers.=20 dose it need to  be a pulse or  could a small frequency shift be= =20 used if time is being measured ?
 
Tnx- G ..
 
 
 
 
 
 


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
------=_NextPart_000_00B3_01C99E96.9661E1D0--