Return-Path: Received: from rly-me01.mx.aol.com (rly-me01.mail.aol.com [172.20.83.34]) by air-me06.mail.aol.com (v123.3) with ESMTP id MAILINME062-99849b147c8c8; Fri, 06 Mar 2009 10:57:33 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-me01.mx.aol.com (v123.3) with ESMTP id MAILRELAYINME014-99849b147c8c8; Fri, 06 Mar 2009 10:56:58 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1LfcPT-0005jz-O4 for rs_out_1@blacksheep.org; Fri, 06 Mar 2009 15:56:27 +0000 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1LfcPT-0005jq-5r for rsgb_lf_group@blacksheep.org; Fri, 06 Mar 2009 15:56:27 +0000 Received: from mail-fx0-f174.google.com ([209.85.220.174]) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1LfcPR-0001YN-O0 for rsgb_lf_group@blacksheep.org; Fri, 06 Mar 2009 15:56:27 +0000 Received: by fxm22 with SMTP id 22so501292fxm.4 for ; Fri, 06 Mar 2009 07:56:19 -0800 (PST) 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=6JXEJZgHZ8/LAuPbl1h0X8SkpkMDbfpZ0l4x2FnKX3M=; b=AiHrJU1P2yb0a0Feh8Nla6wZxAZI0hWCcBoBZUbzJky/QmH0D4qI8gKDQjL9VA9Q6E 6altvwUm+w/2KK2WqENd74NkWpA0EKFC3uOKUJAfMw/r0uAHfG1aLBybITc+hNVIr3Eo zGGFiQyJ/xCoyMNi/UgFy9CL02JXx7oH1Of3o= 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=YcU/VVyRVoebvoY7v7MktA5fj/PvNz4UHoVm8ksFhJVSM6tN528KG4t1X+ANbIIC6Q ySxeKFMK/sN5qWGAk71JAuT+1Qywb1PVgYfWLaUs6VNFp3r6kIxr5K+H/qzGaU52E88R 78m4FImpJmYk5uyU1pw1rxNJL1PXuV/kkWMdM= MIME-Version: 1.0 Received: by 10.223.107.135 with SMTP id b7mr2172756fap.30.1236354979690; Fri, 06 Mar 2009 07:56:19 -0800 (PST) In-Reply-To: <9C03FBF153AB478A9B0DBC5580CF20D2@AGB> References: <0566EF6DE20B4249A3E74859BF9BA2C6@AGB> <9C03FBF153AB478A9B0DBC5580CF20D2@AGB> Date: Fri, 6 Mar 2009 15:56:19 +0000 Message-ID: From: Andy Talbot To: rsgb_lf_group@blacksheep.org DomainKey-Status: good (testing) 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=001636c5b3146179de046475532a X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.8 required=5.0 tests=HTML_30_40,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-m211.2 ; domain : googlemail.com DKIM : pass X-Mailer: Unknown (No Version) --001636c5b3146179de046475532a Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Hi Graham - 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 shoved up in the corner of the garage where, if it catches fire, all damage will be contained, so happy enough running 24/7 for now. The 5MHz monitoring system is in there as well. As for your questions on the pulsed part of the wavefom; its not in use on this transmission , I replaced it with a PSK31 message instead. The original 5MHz system used a pulse width of 500us at a PRF of 40Hz, with the idea of using an SSB reception bandwidth, so something coul dbe done with SSB Tx, 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, > > How long are you thinking of running the beacon and where do you want > the report files to be sent ? > > There may be quite a few records generated in a short time, I note from > the last 'hfc' that there is quite a backlog of data from the 5 meg > operation but there is movement > to analyse the data. should prove interesting .. > > How aggressive is the pulsed section of the tx cycle,?, I know there is > some interest in using that facility for study's on 500, but as yet I have > not 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 .. > > > > > > > --001636c5b3146179de046475532a Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Hi Graham -
I'm not bothered about log files myself as=A0 I don't have the=20= time to collate massses of data but if someone else feels they'd like to= do it...
=A0
Haven't hought about how long it will go for, I may just forget abo= ut it shoved up in the corner of the=A0garage where, if it catches fire, all= damage will be=A0contained, =A0so=A0happy enough=A0running 24/7 for now.= =A0 The 5MHz monitoring system is in there as well.
=A0
As for your questions on the pulsed part of the wavefom;=A0 its not in=20= use on this transmission , I replaced it with a PSK31 message instead.=A0= =A0 The original 5MHz system used a pulse width of 500us at a PRF of 40Hz, w= ith the idea of using an SSB reception bandwidth, so something coul dbe done= with SSB Tx, but these days we'd probably go another direction with PSK= and=A0a PN sequence rather than a simple short pulse.

Andy =A0G4JNT
www.g4jnt.com


2009/3/6 Graham <g8fzk@g8fzk.fsnet.co.uk>
Ok Andy,
=A0
Obvious question, hi,
=A0
How long are you=A0 thinking of running= the=A0 beacon and where do=A0 you=A0 want the report files to=A0 be sent ?<= /font>
=A0
There may be quite a few records genera= ted in a short time, I note from the=20= last 'hfc' that there is quite a backlog of data from the=A0 5=A0 me= g operation but there is movement
to analyse the=A0 data. should prove in= teresting .. =A0
=A0
How aggressive is the pulsed section of= the=A0 tx cycle,?, I know there is some interest in using that facility for= study's on 500, but as yet I have not=A0 found the rise/fall and timing= parameters. dose it need to=A0 be a pulse or=A0 could a small frequency shi= ft be used if time is being measured ?
=A0
Tnx- G ..
=A0
=A0
=A0
=A0
=A0
=A0
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