Return-Path: Received: from mtain-mj02.r1000.mx.aol.com (mtain-mj02.r1000.mail.aol.com [172.21.164.86]) by air-mf04.mail.aol.com (v129.4) with ESMTP id MAILINMF041-8be54c59dbe3134; Wed, 04 Aug 2010 17:30:11 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-mj02.r1000.mx.aol.com (Internet Inbound) with ESMTP id E720E38000087; Wed, 4 Aug 2010 17:30:09 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1OglWX-0001SF-OZ for rs_out_1@blacksheep.org; Wed, 04 Aug 2010 22:29:17 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1OglWX-0001S6-7U for rsgb_lf_group@blacksheep.org; Wed, 04 Aug 2010 22:29:17 +0100 Received: from mout4.freenet.de ([195.4.92.94]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1OglWW-0005F7-DI for rsgb_lf_group@blacksheep.org; Wed, 04 Aug 2010 22:29:17 +0100 Received: from [195.4.92.15] (helo=5.mx.freenet.de) by mout4.freenet.de with esmtpa (ID dl4yhf@freenet.de) (port 25) (Exim 4.72 #3) id 1OglWV-0002Xv-7P for rsgb_lf_group@blacksheep.org; Wed, 04 Aug 2010 23:29:15 +0200 Received: from blfd-5d823395.pool.mediaways.net ([93.130.51.149]:1230 helo=[192.168.0.22]) by 5.mx.freenet.de with esmtpsa (ID dl4yhf@freenet.de) (TLSv1:CAMELLIA256-SHA:256) (port 465) (Exim 4.72 #3) id 1OglWV-00082a-0c for rsgb_lf_group@blacksheep.org; Wed, 04 Aug 2010 23:29:15 +0200 Message-ID: <4C59DBAB.8040907@freenet.de> Date: Wed, 04 Aug 2010 23:29:15 +0200 From: =?ISO-8859-1?Q?Wolfgang_B=FCscher?= User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.9.2.4) Gecko/20100608 Thunderbird/3.1 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <4C51FA69.1030202@iup.uni-heidelberg.de> <4C529C6B.9070908@iup.uni-heidelberg.de> <4C53EB92.4000806@legal-medicine.de> <4C53F284.7070307@iup.uni-heidelberg.de> <2E9DD091D9BA490C9600B92540A7B616@JimPC> <4C56A58C.8020600@iup.uni-heidelberg.de> <143668091.20100802151349@mterrier.net> <4C56F599.5070801@iup.uni-heidelberg.de> <537616379.20100802221230@mterrier.net> <4C57583F.4090709@iup.uni-heidelberg.de> <4C596604.8050108@iup.uni-heidelberg.de> <53387.7570.qm@web111904.mail.gq1.yahoo.com> In-Reply-To: <53387.7570.qm@web111904.mail.gq1.yahoo.com> X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,RATWARE_GECKO_BUILD=1.426 Subject: Re: VLF: DK7FC's 6th VLF kite experiment Content-Type: multipart/alternative; boundary="------------040408050507060303030205" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.5 required=5.0 tests=HTML_20_30,HTML_MESSAGE 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-sid: 3039400c89a44c59dbe10b5f X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) --------------040408050507060303030205 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable Hi Daniele, Yes, the sferic blanking and / or clipping can be done in Spectrum Lab,=20 too. Paul uses his on Linux-based toolchain of analysis programs, but=20 the principle is very similar. What I will add for the noiseblanker /=20 clipper is an extra bandpass filter, so the hum can be removed before=20 building the average (for the threshold). The blanker / clipper can be=20 activated in any of the "DSP blackboxes" in the circuit window. The tricky part, and this is explained in Paul's article, is finding the= =20 optimum setting for the threshold-above-average, which depends on the=20 characteristics of the sferics. More details later. Cheers, Wolf . Am 04.08.2010 15:47, schrieb Daniele Tincani: > Hello VLF, > results of what Pauls calls an "effective sferic blanking" look really= =20 > interesting. Where could it be be possible to learn more about this=20 > kind of noise blanking and its implementation? For example, can it be=20 > obtained by SW in SpectrumLab? > Regards > Daniele > > ------------------------------------------------------------------------ > *From:* Stefan Sch=E4fer > *To:* rsgb_lf_group@blacksheep.org > *Sent:* Wed, August 4, 2010 3:07:16 PM > *Subject:* Re: VLF: DK7FC's 6th VLF kite experiment > > VLF, > > On http://abelian.org/vlf/ss100801/ you can find Paul Nicholsons most=20 > interesting final report on his reception and filter processing of=20 > this 6470 Hz experiment. > > 73, Stefan/DK7FC > > --------------040408050507060303030205 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Hi Daniele,

Yes, the sferic blanking and / or clipping can be done in Spectrum Lab, too. Paul uses his on Linux-based toolchain of analysis programs, but the principle is very similar. What I will add for the noiseblanker / clipper is an extra bandpass filter, so the hum can be removed before building the average (for the threshold).  The blanker / clipper can be activated in any of the "DSP blackboxes" in the circuit window.
The tricky part, and this is explained in Paul's article, is finding the optimum setting for the threshold-above-average, which depends on the characteristics of the sferics. More details later.
Cheers,
   Wolf .

Am 04.08.2010 15:47, schrieb Daniele Tincani:
Hello VLF,
 
results of what Pauls calls an "effective sferic blanking" look really interesting. Where could it be be possible to learn more about this kind of noise blanking and its implementation? For example, can it be obtained by SW in SpectrumLab?
 
Regards
Daniele

From: Stefan Schäfer <Stefan.Schaefer@iup.uni-heidelberg.de>
To: rsgb_lf_group@blacksheep.org
Sent: Wed, August 4, 2010 3:07:16 PM
Subject: Re: VLF: DK7FC's 6th VLF kite experiment

VLF,

On http://abelian.org/vlf/ss100801/ you can find Paul Nicholsons most interesting final report on his reception and filter processing of this 6470 Hz experiment.

73, Stefan/DK7FC



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