Return-Path: Received: from mtain-me08.r1000.mx.aol.com (mtain-me08.r1000.mx.aol.com [172.29.96.144]) by air-db05.mail.aol.com (v129.4) with ESMTP id MAILINDB053-86474cac334033f; Wed, 06 Oct 2010 04:28:48 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-me08.r1000.mx.aol.com (Internet Inbound) with ESMTP id 61297380000F8; Wed, 6 Oct 2010 04:28:46 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1P3PKr-0003TC-Bj for rs_out_1@blacksheep.org; Wed, 06 Oct 2010 09:26:49 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1P3PKq-0003T3-MK for rsgb_lf_group@blacksheep.org; Wed, 06 Oct 2010 09:26:48 +0100 Received: from relay.uni-heidelberg.de ([129.206.100.212]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1P3PKo-0005oE-Sk for rsgb_lf_group@blacksheep.org; Wed, 06 Oct 2010 09:26:48 +0100 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 o968QCxU006231 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 6 Oct 2010 10:26:13 +0200 Received: from [129.206.29.99] (pc99.iup.uni-heidelberg.de [129.206.29.99]) by freitag.iup.uni-heidelberg.de (8.12.11.20060308/8.11.2) with ESMTP id o968Qj2t000347 for ; Wed, 6 Oct 2010 10:26:45 +0200 Message-ID: <4CAC3241.9060800@iup.uni-heidelberg.de> Date: Wed, 06 Oct 2010 10:24:33 +0200 From: =?ISO-8859-1?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 References: <4CA9BDE0.4000601@iup.uni-heidelberg.de> <646839.20132.qm@web111910.mail.gq1.yahoo.com> <4CAA4521.6070301@iup.uni-heidelberg.de> <242345.444.qm@web111918.mail.gq1.yahoo.com> <26222.79702.qm@web111904.mail.gq1.yahoo.com> <4CAB6270.1090007@iup.uni-heidelberg.de> <858745.97136.qm@web111905.mail.gq1.yahoo.com> In-Reply-To: <858745.97136.qm@web111905.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: Inspire VLF-3 receiver Content-Type: multipart/alternative; boundary="------------090202000900060407030908" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.0 required=5.0 tests=HTML_20_30,HTML_MESSAGE, HTML_TITLE_EMPTY 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: 3039ac1d60904cac333e5023 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) --------------090202000900060407030908 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by relay.uni-heidelberg.de id o968QCxU006231 Hi Daniele, Yes, adjust the B slider. But the QRM/QRN must be totally visible on all= =20 frequencies. You can increase the input level but it's better to leave=20 it as you usually have it. It is better to change the range of the=20 visible spectrum, so click: options =3D> audio settings =3D> ..(2) =3D>=20 increase the lower range to -120 dB if necessary. It's good to cover=20 60...80 dB totally so make the same changes on the other side, means if=20 you have -80...-20 dB, go to -120...-60 dB. Additionally you can adjust=20 the B slider. Or you may record a wav file and send it to me. Just click: file =3D>=20 audio files =3D> save input as audio file =3D> (choose a directory and sav= e=20 about 10 seconds). Otherwise the size becomes to big. ;-) 73, Stefan Am 06.10.2010 00:53, schrieb Daniele Tincani: > Hi Stefan, > > Adjust the color scale if necessary but don't change the 'C'=20 > (contrast) slider. > Do you mean I can adjust the Brightness control too? Or simply select=20 > a different palette? > I'm testing the .usr and it results almost in a blank screen (apart=20 > from lower frequencies) because of the fact that strongest signals I=20 > see (for example RDL on 18100Hz) are all below -80dB, with an overall=20 > noise floor around -110dB. In order to have some pixels emerging from=20 > the dark, I have to increase the brightness of the waterfall. Is it OK? > Otherwise, I could increase significantly the line input gain in=20 > Windows. What is the preferred method? > Regards > Daniele > > > ------------------------------------------------------------------------ > *From:* Stefan Sch=E4fer > *To:* rsgb_lf_group@blacksheep.org > *Sent:* Tue, October 5, 2010 7:37:52 PM > *Subject:* Re: VLF: Inspire VLF-3 receiver > > Hi Daniele, > > Am 05.10.2010 17:00, schrieb Daniele Tincani: >> >> My reasoning is: I'm pretty sure :-) that I have hum at home=20 >> affecting reception below 10KHz. >> > > Attached you find an usr file. Just let it run for some hours, maybe=20 > so that the QRN minimum (in Gramany and Italy arround 8...10 UTC) is=20 > visible. Than take a capture maybe at arround 17 UTC and show it here.= =20 > Adjust the color scale if necessary but don't change the 'C'=20 > (contrast) slider. > > We will see your QRN/QRM situation and how strong the Alphas are and=20 > and and... Don't turn the antenna during the recording ;-) > > Later (or before) you can check different antenna angles and check for= =20 > minimum QRM. You can switch on/off everything that may cause QRM in=20 > your house. And you can try to find a quiter location... > > 73, Stefan > --------------090202000900060407030908 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Hi Daniele,

Yes, adjust the B slider. But the QRM/QRN must be totally visible on all frequencies. You can increase the input level but it's better to leave it as you usually have it. It is better to change the range of the visible spectrum, so click: options => audio settings => ..(2) => increase the lower range to -120 dB if necessary. It's good to cover 60...80 dB totally so make the same changes on the other side, means if you have -80...-20 dB, go to -120...-60 dB. Additionally you can adjust the B slider.

Or you may record a wav file and send it to me. Just click: file => audio files => save input as audio file => (choose a directory and save about 10 seconds). Otherwise the size becomes to big. ;-)

73, Stefan



Am 06.10.2010 00:53, schrieb Daniele Tincani:
Hi Stefan,
 
> Adjust the color scale if necessary but don't change the 'C' (contrast) slider.
 
Do you mean I can adjust the Brightness control too? Or simply select a different palette?
I'm testing the .usr and it results almost in a blank screen (apart from lower frequencies) because of the fact that strongest signals I see (for example RDL on 18100Hz) are all below -80dB, with an overall noise floor around -110dB. In order to have some pixels emerging from the dark, I have to increase the brightness of the waterfall. Is it OK?
Otherwise, I could increase significantly the line input gain in Windows. What is the preferred method?
 
Regards
Daniele


From: Stefan Schäfer <Stefan.Schaefer@iup.uni-heidelberg.de>
To: rsgb_lf_group@blacksheep.org
Sent: Tue, October 5, 2010 7:37:52 PM
Subject: Re: VLF: Inspire VLF-3 receiver

Hi Daniele,

Am 05.10.2010 17:00, schrieb Daniele Tincani:

My reasoning is: I'm pretty sure :-) that I have hum at home affecting reception below 10KHz.


Attached you find an usr file. Just let it run for some hours, maybe so that the QRN minimum (in Gramany and Italy arround 8...10 UTC) is visible. Than take a capture maybe at arround 17 UTC and show it here. Adjust the color scale if necessary but don't change the 'C' (contrast) slider.

We will see your QRN/QRM situation and how strong the Alphas are and and and... Don't turn the antenna during the recording ;-)

Later (or before) you can check different antenna angles and check for minimum QRM. You can switch on/off everything that may cause QRM in your house. And you can try to find a quiter location...

73, Stefan

--------------090202000900060407030908--