Envelope-to: dave@picks.force9.co.uk
Delivery-date: Tue, 05 Jul 2005 15:02:27 +0100
Received: by pih-mxcore05.plus.net with spam-scanned (PlusNet MXCore v2.00) id 1Dpo0F-0007ML-Nh 
	  for dave@picks.force9.co.uk; Tue, 05 Jul 2005 15:02:26 +0100
Received: from post.thorcom.com ([193.82.116.20])
	  by pih-mxcore05.plus.net with esmtp (PlusNet MXCore v2.00) id 1Dpo0E-0007Jn-V2 
	  for dave@picks.force9.co.uk; Tue, 05 Jul 2005 15:02:23 +0100
Received: from majordom by post.thorcom.com with local (Exim 4.14)
	id 1Dpnzc-0003Lw-4x
	for rs_out_1@blacksheep.org; Tue, 05 Jul 2005 15:01:44 +0100
Received: from [193.82.59.130] (helo=relay2.thorcom.net)
	by post.thorcom.com with esmtp (Exim 4.14)
	id 1Dpnzb-0003Ln-FB
	for rsgb_lf_group@blacksheep.org; Tue, 05 Jul 2005 15:01:43 +0100
Received: from smtp1.wanadoo.co.uk ([193.252.22.158] helo=smtp1.freeserve.com)
	by relay2.thorcom.net with esmtp (Exim 4.51)
	id 1Dpo6Q-0006qD-9a
	for rsgb_lf_group@blacksheep.org; Tue, 05 Jul 2005 15:08:51 +0100
Received: from me-wanadoo.net (yebox.com [127.0.0.1])
	by mwinf3009.me.freeserve.com (SMTP Server) with ESMTP id 121EB1C00083
	for <rsgb_lf_group@blacksheep.org>; Tue,  5 Jul 2005 16:01:28 +0200 (CEST)
Received: from wwinf3001 (wwinf3001 [172.22.159.28])
	by mwinf3009.me.freeserve.com (SMTP Server) with ESMTP id 0D34B1C00082
	for <rsgb_lf_group@blacksheep.org>; Tue,  5 Jul 2005 16:01:28 +0200 (CEST)
X-ME-UUID: 20050705140128542.0D34B1C00082@mwinf3009.me.freeserve.com
Message-ID: <29596326.1120572088040.JavaMail.www@wwinf3001>
From: Lawrence Mayhead G3AQC <laurie@g3aqc.freeserve.co.uk>
To: RSGB <rsgb_lf_group@blacksheep.org>
Mime-Version: 1.0
X-Originating-IP: [86.131.82.134]
Date: Tue,  5 Jul 2005 16:01:28 +0200 (CEST)
Subject: LF: Narrow B/W Techniques
Content-Type: text/html; charset=windows-1252
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-PN-SpamFiltered: by PlusNet MXCore (v2.00)
Content-transfer-encoding: 8bit

<P>This is an appeal to the writers of QRSS/Argo?Spectran software, and also to those much more expert than&nbsp;I am to comment.</P>
<P>Is it time we looked at method of time synchronisation? in order to improve sig/noise ratio in&nbsp;very slow morse transmissions. ie QRSS.</P>
<P>As I understand it about 3db improvement is possible by making the FFT sample time equal to the dot length. </P>
<P>If we are using QRSS10 for example a time accuracy of&nbsp; 1 sec. is only 10% and at QRSS30 this is only a 3% error. I should not have thought it too difficult to get this fromGPS or even MSF-60 or DCF 77 time clocks, nor should it be too expensive.</P>
<P>My big question is however how do I :-&nbsp;1) Synchronise my QRSS/DFCW programs and 2)&nbsp;my Spectran/ARGO programs to the computer clock. Does this facility exist and if not would it be&nbsp;very difficult to implement?&nbsp;</P>
<P>If these options were available perhaps more people would consider locking their computer clocks,&nbsp;so perhaps we could win another 3db.&nbsp;</P>
<P>73 Laurie&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</P><BR><BR><hr size="1">Whatever you <a href="http://www.wanadoo.co.uk/time/" target="_blank">Wanadoo</a><br><br>This email has been checked for most known viruses - find out more <a href="http://www.wanadoo.co.uk/help/id/7098.htm" target="_blank">here</a>