Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mg05.r1000.mx.aol.com (Internet Inbound) with ESMTP id 36022380000A4; Sun, 11 Mar 2012 09:05:02 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1S6iRA-0001A3-EG for rs_out_1@blacksheep.org; Sun, 11 Mar 2012 13:03:48 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1S6iR9-00019u-VR for rsgb_lf_group@blacksheep.org; Sun, 11 Mar 2012 13:03:47 +0000 Received: from mail-iy0-f171.google.com ([209.85.210.171]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1S6iR6-0000Yx-SP for rsgb_lf_group@blacksheep.org; Sun, 11 Mar 2012 13:03:47 +0000 Received: by iadj38 with SMTP id j38so8641772iad.16 for ; Sun, 11 Mar 2012 06:03:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type:content-transfer-encoding; bh=Dy/eP3ReD4/jtwcXifRwFQ4n7XJa+zEB/W87J8V4YrY=; b=XR2jhT32LIG1XK9oY8ZoyCZ9UOxhxbLRz9PzGtQ1pvq68IqwMRwfXlzXx9v8xl2Ioe M38Rybl2T7fQZaGZ4NrBhGrDPzj6ZaqdwHFl0fR9sbuqzh70nr2RKOeIXD4TrIkMpq9Z AVzmhL4POBJ3M3wUnRXHCsadL1vtjhhP4CsYtLdE0ug0a0D5OiHnrJqXAHQduH7HIlF5 ocEMTcdlkTMDkcu6MLs/K2IzRdGfBnX6XDySKDz8A3LRwb/hrIMxR8TU2Tymu5kCTZu3 ofqdYiRS5n5K/bkN79nZQzMfyqgHfSggK1Ur6Iv1Il6lrvu0ZAUYaxVq7Sg+62nozKmG TzBQ== MIME-Version: 1.0 Received: by 10.50.106.200 with SMTP id gw8mr14154216igb.10.1331471018453; Sun, 11 Mar 2012 06:03:38 -0700 (PDT) Received: by 10.231.234.136 with HTTP; Sun, 11 Mar 2012 06:03:38 -0700 (PDT) In-Reply-To: References: Date: Sun, 11 Mar 2012 13:03:38 +0000 Message-ID: From: Andy Talbot To: rsgb_lf_group@blacksheep.org X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: LF: + 7dB in 424uHz , convert to 2.5Khz ? Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none 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-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:362555552:93952408 X-AOL-SCOLL-URL_COUNT: 0 X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-m266.2 ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1d60cd4f5ca2fe75e2 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Subtract 10.LOG(2500 / 424e-6) =3D 67.7dB So +7dB in 424uHz =3D -60.7dB S/N in 2500Hz for 848uHz, use 10.LOG(2500/646e-6) =3D 64.7dB (3dB difference, not 3.5dB as you state) 'jnt On 11 March 2012 12:55, Graham wrote: > How=A0 do=A0 you=A0 scale=A0 these=A0 uHz=A0 d/b levels=A0 to=A0=A0=A0oth= er=A0=A0 bandwidth's ? > > If=A0 the=A0 b/w=A0 is=A0=A0 848 uHz=A0=A0 is the=A0=A0 dB=A0 level=A0=A0= =A0=A0 + 3.5 dB=A0 ? > > + 7dB=A0 in=A0 424uHz ,=A0 convert to=A0 2.5Khz=A0=A0 b/w? > > tnx -G.