Return-Path: Received: from rly-db06.mx.aol.com (rly-db06.mail.aol.com [172.19.130.81]) by air-db10.mail.aol.com (v121.4) with ESMTP id MAILINDB103-ad0478e3a3811f; Wed, 16 Jan 2008 12:09:35 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-db06.mx.aol.com (v121.4) with ESMTP id MAILRELAYINDB066-ad0478e3a3811f; Wed, 16 Jan 2008 12:09:14 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1JFBlB-0005JK-Az for rs_out_1@blacksheep.org; Wed, 16 Jan 2008 17:09:05 +0000 Received: from [193.82.59.130] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1JFBl8-0005JA-8X for rsgb_lf_group@blacksheep.org; Wed, 16 Jan 2008 17:09:02 +0000 Received: from cmsout01.mbox.net ([165.212.64.31]) by relay2.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1JFBl4-00038V-Cw for rsgb_lf_group@blacksheep.org; Wed, 16 Jan 2008 17:09:02 +0000 Received: from cmsout01.mbox.net (cmsout01.mbox.net [165.212.64.31]) by cmsout01.mbox.net (Postfix) with ESMTP id BDF685352 for ; Wed, 16 Jan 2008 17:08:50 +0000 (GMT) Received: from cmsapps03.cms.usa.net [165.212.11.132] by cmsout01.mbox.net via smtad (C8.MAIN.3.34P) with ESMTP id XID256maPRiz5711X01; Wed, 16 Jan 2008 17:08:51 -0000 X-USANET-Source: 165.212.11.132 IN dibene@usa.net cmsapps03.cms.usa.net X-USANET-MsgId: XID256maPRiz5711X01 Received: from [192.168.1.3] [151.47.209.0] by cmsapps03.cms.usa.net (ESMTPA/dibene@usa.net) via mtad (C8.MAIN.3.40M) with ESMTPA id 651maPRiU0106M39; Wed, 16 Jan 2008 17:08:46 -0000 X-USANET-Auth: 151.47.209.0 AUTH dibene@usa.net [192.168.1.3] Message-ID: <478E3A1F.9050808@usa.net> Date: Wed, 16 Jan 2008 18:08:47 +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: <933932.3248.qm@web28111.mail.ukl.yahoo.com> In-Reply-To: <933932.3248.qm@web28111.mail.ukl.yahoo.com> X-Enigmail-Version: 0.95.6 Z-USANET-MsgId: XID651maPRiv0106X39 X-Spam-Score: 0.4 (/) X-Spam-Report: autolearn=disabled,AWL=0.406 Subject: Re: LF: LF Receiver 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) lawrence mayhead wrote: > > So that leaves SDR receivers like the Perseus, thanks Johan, but > these are digital, can the AGC be turned off? In a SDR receiver, the possibility to turn OFF the AGC is a software function, so, in case it is not implemented, just ask the author of the program... > and another problem if > my computer sound card is tied up processing I/Q signals can it > also do the FFT analysis ? at the same time. Perhaps Andy can help? This is a common misconception... the sound card in a SDR receiver does NOT do any processing, nor FFT computations... they are all made by the central CPU, be it a Pentium or an Athlon.... the ONLY function of the sound card is to digitize the input signal (at least in the Tayloe mixer type of SDR) and to playback the demodulated audio. So the only very important characteristic of a sound card is the quality of its ADC converter. 73 Alberto I2PHD