Return-Path: Received: (qmail 26891 invoked from network); 26 Feb 2001 13:25:41 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by 10.226.25.101 with SMTP; 26 Feb 2001 13:25:41 -0000 Received: (qmail 27412 invoked from network); 26 Feb 2001 13:25:40 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 26 Feb 2001 13:25:40 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 14XNWa-0003Ht-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 26 Feb 2001 13:17:12 +0000 Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 14XNWZ-0003Ho-00 for rsgb_lf_group@blacksheep.org; Mon, 26 Feb 2001 13:17:11 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id NAA12966; Mon, 26 Feb 2001 13:19:08 GMT Received: (qmail 3927 invoked from network); 26 Feb 2001 14:09:06 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 26 Feb 2001 14:09:06 -0000 Received: by gauntlet.mail.dera.gov.uk; id NAA08234; Mon, 26 Feb 2001 13:57:43 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma008111; Mon, 26 Feb 01 13:57:26 GMT Received: from FRN-MAIL-3.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with ESMTP id for ; Mon, 26 Feb 2001 13:21:17 +0000 Received: by frn-mail-3.dera.gov.uk with Internet Mail Service (5.5.2650.21) id ; Mon, 26 Feb 2001 13:16:32 -0000 Message-ID: <65AECDF1F89AD411900400508BFC869F0D75E7@pdw-mail-1.dera.gov.uk> From: "Talbot Andrew" To: rsgb_lf_group@blacksheep.org Subject: LF: Re: 10 sec. dots Date: Mon, 26 Feb 2001 13:16:45 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) Content-Type: text/plain; charset=iso-8859-1; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Oh -- that explains a lot -- Particularly, why, during testing yesterday of SMT Hell bandwidths and pixel durations, the optimum settings for decoding with Argo seemed to come out with ratios that did not appear to be exactly related to specified dot length. Shouldn't the labelled dot length be in ratios of 2 then, rather than 3 ? Andy G4JNT > -----Original Message----- > From: Alberto di Bene [mailto:dibene@usa.net] > Sent: 2001-02-26 12:37 > To: rsgb_lf_group@blacksheep.org > Subject: LF: Re: 10 sec. dots > > >> At 10s dot the FFT bin size is exactly 1/4 of the size at 3s > dot. So, if the noise power > is evenly distributed, and the wanted signal falls exactly in > a single bin, there is a 6 dB > S/N improvement from passing from one mode to the other. How > those 6 dB translate > into a visual gain is difficult to say, given also the higly > non-linear mapping between > magnitudes and color saturation in Argo. > > 73 Alberto I2PHD > > > -- The Information contained in this E-Mail and any subsequent correspondence is private and is intended solely for the intended recipient(s). For those other than the recipient any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on such information is prohibited and may be unlawful.