Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-df02.r1000.mx.aol.com (Internet Inbound) with ESMTP id 7F23D380000A8; Mon, 28 Nov 2011 10:16:20 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RV2uq-0006Qm-Lz for rs_out_1@blacksheep.org; Mon, 28 Nov 2011 15:14:44 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RV2uq-0006Qd-54 for rsgb_lf_group@blacksheep.org; Mon, 28 Nov 2011 15:14:44 +0000 Received: from relay.uni-heidelberg.de ([129.206.100.212]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RV2up-0005pR-Ln for rsgb_lf_group@blacksheep.org; Mon, 28 Nov 2011 15:14:44 +0000 Received: from freitag.iup.uni-heidelberg.de (freitag.iup.uni-heidelberg.de [129.206.29.204]) by relay.uni-heidelberg.de (8.14.1/8.14.1) with ESMTP id pASFEgin032307 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Mon, 28 Nov 2011 16:14:42 +0100 Received: from [129.206.22.206] (pc206.iup.uni-heidelberg.de [129.206.22.206]) by freitag.iup.uni-heidelberg.de (8.12.11.20060308/8.11.2) with ESMTP id pASFEgh7031528 for ; Mon, 28 Nov 2011 16:14:42 +0100 Message-ID: <4ED3A50A.6070609@iup.uni-heidelberg.de> Date: Mon, 28 Nov 2011 16:13:14 +0100 From: =?ISO-8859-2?Q?Stefan_Sch=E4fer?= User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org X-Spam-Score: 1.6 (+) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,HTML_TAG_EXIST_TBODY=0.126,RATWARE_GECKO_BUILD=1.426 Subject: Fwd: Re: LF: TA detection of a ham generated 8970 Hz signal? Content-Type: multipart/alternative; boundary="------------090405060402040906050903" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.6 required=5.0 tests=HTML_20_30,HTML_MESSAGE, HTML_TAG_EXISTS_TBODY 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: 0:2:453049984:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d40d64ed3a5c463f5 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multi-part message in MIME format. --------------090405060402040906050903 Content-Type: text/plain; charset=ISO-8859-2; format=flowed Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by relay.uni-heidelberg.de id pASFEgin032307 VLF, Seems there was still no TA detection of my signal. We'll have to do=20 another attempt. Message from Paul below. 73, Stefan/DK7FC -------- Original-Nachricht -------- Betreff: Re: LF: TA detection of a ham generated 8970 Hz signal? Datum: Sun, 27 Nov 2011 17:02:30 +0000 Von: Paul An: Stefan Sch=E4fer CC: Markus Vester , Mike Smith=20 It looks like the peak on Marlton's signal is spurious and is occurring due to cross-talk in a 2-channel vorbis link. I've been doing some trials. The cross-talk on large signals is 70dB down or more, but not so the background noise. The background noise (and anything buried in it) becomes quite significantly correlated after passing through the variable bit rate encoding. Will test the constant bit rate mode, that will hopefully behave differently. This cross talk is enough to explain the peaks seen last night. Now I concentrate on analysing the raw data in Mike's raw signal database, which is not contaminated by cross- talk. The recorded data is fine, so I start again from scratch. -- Paul Nicholson -- --------------090405060402040906050903 Content-Type: text/html; charset=ISO-8859-2 Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by relay.uni-heidelberg.de id pASFEgin032307 VLF,

Seems there was still no TA detection of my signal. We'll have to do another attempt.
Message from Paul below.

73, Stefan/DK7FC

-------- Original-Nachricht --------
Betreff: = Re: LF: TA detection of a ham generated 8970 Hz signal?
Datum: Sun, 27 Nov 2011 17:02:30 +0000
Von: Paul <paul@abelian.netcom.co.uk>
An: Stefan Sch=E4fer <Stefan.Schaefer@iup.uni-he= idelberg.de>
CC: Markus Vester <markusvester@aol.com>, Mike Smith <michael.smith20@gmail.com> 


It looks like the peak on Marlton's signal is spurious
and is occurring due to cross-talk in a 2-channel
vorbis link.

I've been doing some trials.   The cross-talk on large
signals is 70dB down or more, but not so the background noise.

The background noise (and anything buried in it) becomes quite
significantly correlated after passing through the variable
bit rate encoding.   Will test the constant bit rate mode, that
will hopefully behave differently.

This cross talk is enough to explain the peaks seen last
night.   Now I concentrate on analysing the raw data in
Mike's raw signal database, which is not contaminated by cross-
talk.  The recorded data is fine, so I start again from scratch.

--
Paul Nicholson
--
--------------090405060402040906050903--