Return-Path: Received: (qmail 20877 invoked from network); 27 Mar 2001 13:30:09 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 27 Mar 2001 13:30:09 -0000 Received: (qmail 28967 invoked from network); 27 Mar 2001 13:30:08 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 27 Mar 2001 13:30:08 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 14htRk-0002As-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 27 Mar 2001 14:23:40 +0100 Received: from mail3.svr.pol.co.uk ([195.92.193.19]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 14htRh-0002An-00 for rsgb_lf_group@blacksheep.org; Tue, 27 Mar 2001 14:23:37 +0100 Received: from modem-175.eldamar.dialup.pol.co.uk ([62.136.181.175] helo=g3aqc) by mail3.svr.pol.co.uk with smtp (Exim 3.13 #0) id 14htRJ-0004y8-00 for rsgb_lf_group@blacksheep.org; Tue, 27 Mar 2001 14:23:14 +0100 Message-ID: <001201c0b6b8$9b6ca440$afb5883e@g3aqc> From: "Laurie Mayhead" To: rsgb_lf_group@blacksheep.org Subject: LF:(TECH) A question. Date: Tue, 27 Mar 2001 13:22:00 +0100 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit

Alberto,I am not an expert here, but if I wanted to compare signals over a period of time, I would think it necessesary to establish a reference level say from a signal generator.This would include all the elements in the chain including the reciever.So if a ref. level is established in this way, clicking on this first and then on the unknown signal would determine the difference in db as you suggest. For what its worth! 73s Laurie.