Return-Path: Received: (qmail 62018 invoked from network); 31 Jan 2005 05:12:15 -0000 Received: from unknown (HELO ptb-spamcore02.plus.net) (192.168.71.3) by ptb-mailstore02.plus.net with SMTP; 31 Jan 2005 05:12:15 -0000 Received: from mailnull by ptb-spamcore02.plus.net with spamcore-l-b (Exim 4.32; FreeBSD) id 1CvTon-000FUX-5i for dave@picks.force9.co.uk; Mon, 31 Jan 2005 05:09:48 +0000 Received: from [192.168.67.1] (helo=ptb-mxcore01.plus.net) by ptb-spamcore02.plus.net with esmtp (Exim 4.32; FreeBSD) id 1CvTol-000FUB-Rf for dave@picks.force9.co.uk; Mon, 31 Jan 2005 05:09:43 +0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim) id 1CvTrl-0004Of-36 for dave@picks.force9.co.uk; Mon, 31 Jan 2005 05:12:49 +0000 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1CvTo1-0001eR-9v for rs_out_1@blacksheep.org; Mon, 31 Jan 2005 05:08:57 +0000 Received: from [193.82.116.30] (helo=relay.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1CvTo0-0001e9-Ij for rsgb_lf_group@blacksheep.org; Mon, 31 Jan 2005 05:08:56 +0000 Received: from relay.sotline.ru ([80.89.139.226]) by relay.thorcom.net with esmtp (Exim 4.43) id 1CvTnx-0005s7-JG for rsgb_lf_group@blacksheep.org; Mon, 31 Jan 2005 05:08:56 +0000 Received: from astral.omskcity.com (mxs.sotline.ru [80.89.139.227]) by relay.sotline.ru (8.12.8p2/8.12.8) with ESMTP id j0V58leg060364 for ; Mon, 31 Jan 2005 11:08:47 +0600 (OMST) (envelope-from fitec@omskcity.com) Received: from noname.nodomain.nowhere (host198.m02.dial.sotline.ru [81.176.51.198]) by astral.omskcity.com (8.x.x) with ESMTP id j0V58htM028489 for ; Mon, 31 Jan 2005 11:08:46 +0600 (OS) Received: from localhost (fitec@localhost) by noname.nodomain.nowhere (8.8.5/8.8.5) with SMTP id LAA00267 for ; Mon, 31 Jan 2005 11:15:55 GMT X-Authentication-Warning: noname.nodomain.nowhere: fitec owned process doing -bs Date: Mon, 31 Jan 2005 11:15:54 +0000 (GMT) From: "Alexander S. Yurkov" To: rsgb_lf_group@blacksheep.org In-Reply-To: <41FD3D40.8050500@freenet.de> Message-ID: MIME-Version: 1.0 X-SPF-Result: relay.thorcom.net: domain of omskcity.com designates 80.89.139.226 as permitted sender X-Spam-Score: 0.1 (/) X-Spam-Report: autolearn=failed,FORGED_RCVD_HELO=0.05 Subject: Re: LF: weak sigs on 137715 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com 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-Spam-Filtered: by PlusNet SpamCORE (v3.00) Content-transfer-encoding: 8bit Hi Wolf, On Sun, 30 Jan 2005, Wolf DL4YHF wrote: > To verify your RX system, how about letting a slowly drifting oscillator > (like an LC-osc) run over the entire "RX window" ? If everything is ok, > a non-interrupted diagonal line should appear if the drift is slow > enough. If there are gaps in the line, something is wrong with the audio > processing, most likely loss of samples. It's a good idea! Why it does not come to my head before... > > Besides this, in addition to Markus' post, if anyone is interested in > the C / C++ variant of his Colour Direction Finder to make a linux or > DOS port from it, just ask and I will send them to you via email. Not now, some time later... I gave > up my Linux-programming ambitions some years ago when it began eating up > all my spare time. Have You any info about sound card programing in Linux? Now I have understand I can easy write down in Pascal: Assign(file,'/dev/dsp'); ................... Read(file,byte); ............ to get unsigned bytes (8bit sampels) or Assign(file,'dev/dspW'); ..................... Read(file,word); ............... to get signed (!) words (16bit samples). Or someone similar in C but I am more familar with Pascal not C. Such an easy access! All works well. But to be sure all will be OK any time I sould control sound card. Particulary I should initiate sound card and set sampling rate at least. I have understend it can be done via ioctl(file,cmd,arguments) C-call (no problem to connect Pascal with some C-functions). But I need detail description of avaluable 'cmd' and format and description of 'arguments'. I can't find this in my system yet... Besides duplex mode (write/read simultaniously) doesn't work. I do not know why, AD and DA seems to be separated devices... But that was before the arrival of simple graphic > user interfaces, maybe its easier these days to write a simple spectrum > analyser - something like "Argo for Linux" ;-) . Yes, it is usefull. Linrad is too complex! 73 de RA9MB/Alex http://www.qsl.net/ra9mb