Return-Path: Received: from rly-me03.mx.aol.com (rly-me03.mail.aol.com [172.20.83.36]) by air-me06.mail.aol.com (v121.4) with ESMTP id MAILINME061-9ab47990b8b4a; Thu, 24 Jan 2008 17:05:04 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-me03.mx.aol.com (v121.4) with ESMTP id MAILRELAYINME037-9ab47990b8b4a; Thu, 24 Jan 2008 17:05:01 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1JIABB-0006Yf-GP for rs_out_1@blacksheep.org; Thu, 24 Jan 2008 22:04:13 +0000 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1JIAB8-0006YW-8u for rsgb_lf_group@blacksheep.org; Thu, 24 Jan 2008 22:04:10 +0000 Received: from cmsout02.mbox.net ([165.212.64.32]) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1JIAB5-0004dc-6K for rsgb_lf_group@blacksheep.org; Thu, 24 Jan 2008 22:04:10 +0000 Received: from cmsout02.mbox.net (cmsout02.mbox.net [165.212.64.32]) by cmsout02.mbox.net (Postfix) with ESMTP id 793CD5BA2 for ; Thu, 24 Jan 2008 22:03:55 +0000 (GMT) Received: from cmsapps06.cms.usa.net [165.212.11.129] by cmsout02.mbox.net via smtad (C8.MAIN.3.34P) with ESMTP id XID786maXwD53736X02; Thu, 24 Jan 2008 22:03:55 -0000 X-USANET-Source: 165.212.11.129 IN dibene@usa.net cmsapps06.cms.usa.net X-USANET-MsgId: XID786maXwD53736X02 Received: from [192.168.1.3] [151.47.215.63] by cmsapps06.cms.usa.net (ESMTPA/dibene@usa.net) via mtad (C8.MAIN.3.40M) with ESMTPA id 242maXwD20181M29; Thu, 24 Jan 2008 22:03:53 -0000 X-USANET-Auth: 151.47.215.63 AUTH dibene@usa.net [192.168.1.3] Message-ID: <47990B47.4060000@usa.net> Date: Thu, 24 Jan 2008 23:03:51 +0100 From: Alberto di Bene User-Agent: Thunderbird 2.0.0.9 (Windows/20071031) MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <012420081531.5467.4798AF54000325AB0000155B22155688849C9D01CD05@comcast.net> In-Reply-To: <012420081531.5467.4798AF54000325AB0000155B22155688849C9D01CD05@comcast.net> X-Enigmail-Version: 0.95.6 Z-USANET-MsgId: XID242maXwD20181X29 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: LF: Re. LF Receivers Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit 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-IP: 193.82.116.20 X-AOL-SCOLL-AUTHENTICATION: listenair ; SPF_helo : n X-AOL-SCOLL-AUTHENTICATION: listenair ; SPF_822_from : n X-Mailer: Unknown (No Version) k2ors@comcast.net wrote: > > Back to the AGC issues, Rob Sherwood of Sherwood Engineering has published a slide presentation on how poorly ALL DSP > receivers perform under QRN conditions due to the DSP handling of AGC: I don't know which receivers he tested, but the problem he reported is simply caused by a too fast attack time of the AGC, which reacts to narrow spikes and pulses, lowering unnecessarily the gain of the receiver and causing a sort of pumping effect. In software that can be fixed quite easily. That the manufacturers of blazoned DSP radios haven't done it, that is a different discourse... 73 Alberto I2PHD