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[98.139.164.53]) by mx.google.com with SMTP id d11si1517633qcu.31.2013.06.24.12.41.20 for ; Mon, 24 Jun 2013 12:41:21 -0700 (PDT) Received-SPF: pass (google.com: manual fallback record for domain of sentto-85080895-3216-1372102878-daveyxm=virginmedia.com@returns.groups.yahoo.com designates 98.139.164.53 as permitted sender) client-ip=98.139.164.53; Authentication-Results: mx.google.com; spf=pass (google.com: manual fallback record for domain of sentto-85080895-3216-1372102878-daveyxm=virginmedia.com@returns.groups.yahoo.com designates 98.139.164.53 as permitted sender) smtp.mail=sentto-85080895-3216-1372102878-daveyxm=virginmedia.com@returns.groups.yahoo.com; dkim=pass header.i=@yahoogroups.co.uk DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoogroups.co.uk; s=oscaro; t=1372102880; bh=VuO3Rp+NasM7CYbjlzSDXrDp5E0HYItg1nFrNag1vAM=; h=Received:Received:X-Yahoo-Newman-Id:X-Sender:X-Apparently-To:X-Received:X-Received:X-Received:X-Received:X-Received:Message-ID:To:References:X-Priority:X-MSMail-Priority:Importance:X-Mailer:X-MimeOLE:x-aol-global-disposition:X-AOL-SCOLL-SCORE:X-AOL-SCOLL-URL_COUNT:x-aol-sid:X-AOL-IP:X-Originating-IP:X-eGroups-Msg-Info:From:X-Yahoo-Profile:Sender:MIME-Version:Mailing-List:Delivered-To:List-Id:Precedence:List-Unsubscribe:Date:Subject:Reply-To:X-Yahoo-Newman-Property:Content-Type; b=Hawa+/GF3MjNXNqDAdoZz54ah9Bks0u2qhUoEFHeV4XTzNe96btCVp6zZ/rJUDUlvcm/q8QCbkC4CUgBs5WkrFAOHIwqtfJvG2WGUki8uoT1ZzfbjsFE3e7N+Pio65AjNVGMfvGI18ymmVzKP0mC/yfEOsxhMEuothPQC2JXUBA= DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=oscaro; d=yahoogroups.co.uk; b=Mm4xkZD1eDvslnbNeICcNmqdTDwAkw43gGICxZEVkff0Z+3m7Zz5PqwFpqq3nDO5A8zaQoq3FA/o6hpn1TxbUucuMrX34Njk9P5Jhebv7Ko1xihs9a8fW1iOuydp7jSwiDYU4ZSvaxAqfc9ngLUPbk40ATOnxbZPvi0ifVRC6s8=; Received: from [66.196.81.182] by ng11.bullet.mail.bf1.yahoo.com with NNFMP; 24 Jun 2013 19:41:20 -0000 Received: from [98.137.34.38] by tg10.bullet.mail.bf1.yahoo.com with NNFMP; 24 Jun 2013 19:41:19 -0000 X-Yahoo-Newman-Id: 85080895-m3216 X-Sender: markusvester@aol.com X-Apparently-To: rsgb_lf_group@yahoogroups.co.uk X-Received: (qmail 17651 invoked from network); 24 Jun 2013 19:41:17 -0000 X-Received: from unknown (98.137.63.203) by m2.grp.sp2.yahoo.com with QMQP; 24 Jun 2013 19:41:17 -0000 X-Received: from unknown (HELO omr-m03.mx.aol.com) (64.12.143.77) by mtaq4.grp.sp2.yahoo.com with SMTP; 24 Jun 2013 19:41:17 -0000 X-Received: from mtaout-mb03.r1000.mx.aol.com (mtaout-mb03.r1000.mx.aol.com [172.29.41.67]) by omr-m03.mx.aol.com (Outbound Mail Relay) with ESMTP id 304C870036227; Mon, 24 Jun 2013 15:41:15 -0400 (EDT) X-Received: from White (188-195-246-26-dynip.superkabel.de [188.195.246.26]) by mtaout-mb03.r1000.mx.aol.com (MUA/Third Party Client Interface) with ESMTPA id D98F3E00014C; Mon, 24 Jun 2013 15:41:11 -0400 (EDT) Message-ID: <53308F95255B4EA1879CB0188F303926@White> To: , References: <000801ce7101$d673eab0$835bc010$@gmx.de> X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 12.0.1606 X-MimeOLE: Produced By Microsoft MimeOLE V12.0.1606 x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:464757280:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d294351c8a0d637e5 X-AOL-IP: 188.195.246.26 X-Originating-IP: 64.12.143.77 X-eGroups-Msg-Info: 1:12:0:0:0 From: "Markus Vester" X-Yahoo-Profile: df6nm Sender: rsgb_lf_group@yahoogroups.co.uk MIME-Version: 1.0 Mailing-List: list rsgb_lf_group@yahoogroups.co.uk; contact rsgb_lf_group-owner@yahoogroups.co.uk Delivered-To: mailing list rsgb_lf_group@yahoogroups.co.uk List-Id: Precedence: bulk List-Unsubscribe: Date: Mon, 24 Jun 2013 21:41:07 +0200 Subject: [rsgb_lf_group] Re: LF: VO1NA Opera-32 Reply-To: rsgb_lf_group@yahoogroups.co.uk X-Yahoo-Newman-Property: groups-email-ff-m Content-Type: multipart/alternative; boundary="----=_NextPart_000_0006_01CE7123.88C63C10" Status: O X-Status: X-Keywords: X-UID: 3850 ------=_NextPart_000_0006_01CE7123.88C63C10 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Thanks Joe. From your QTH, Magdeburg should be around 60 deg azimuth (rough= ly northeast), so DCF39 would indeed have been significantly attenuated by = the loop. Although generally not recommended, I will now try to insert the same bandp= ass and noiseblanker before Opera to cut out the DCF telegrams, and run it = in parallel to opds again. Best 73, Markus (DF6NM)=20 =20 From: Joe=20 Sent: Monday, June 24, 2013 7:39 PM To: rsgb_lf_group@blacksheep.org=20 Subject: AW: LF: VO1NA Opera-32 Hi Markus, LF =20 The antenna is mounted abt. 2m above the ground in my backyard abt. 20m awa= y from any electrical installations. The last nights it were pointing NW - SE (USA =DF-> Greece) =20 73 Joe =20 From: Markus Vester=20 Sent: Monday, June 24, 2013 10:49 AM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: LF: VO1NA Opera-32 =20 Last night the EA5HVK Opera decoder and my opds correlation detector ran si= de by side here on one machine, fed by the same soundcard. Opera got the fu= ll passband (136-138.2 kHz) through SpecLab and VAC without further audio p= rocessing, whereas the other SpecLab instance for opds had a 160 Hz bandpas= s filter, noise blanker and audio AGC inserted before the 0.477 mHz FFT. Th= e QRN background from the southeast was generally lower than the night befo= re. =20 Results for both are in=20 df6nm.bplaced.net/opera/Opera_vs_opds_130623-24.txt and a screenshot df6nm.bplaced.net/opera/Opera_vs_opds_screenshot_130624.jpg =20 Although SNR results shown by Opera were consistently better than those for= opds, Opera achieved two only decodes while opds produced ten hits (includ= ing three from VO1NA). =20 I am wondering whether this difference may have been exacerbated by the reg= ular splatter from DCF39 which is quite strong in central Europe. This may = also have affected the SNR estimates of either program. Maybe in this situa= tion dedicated preprocessing might be helpful for Opera as well? =20 We may perhaps speculate that possible DCF suppression may be part of the l= oop advantage observed by DF2JP - Joe could you comment on your loop's orie= ntation?=20 =20 Best 73, Markus (DF6NM) =20 From: Markus Vester=20 Sent: Sunday, June 23, 2013 1:25 PM To: rsgb_lf_group@blacksheep.org ; rsgb_lf_group@yahoogroups.co.uk=20 Subject: Re: LF: VO1NA Opera-32 =20 I have downloaded Opera v1.4.7 from the rosmodem website. It was easy to co= nfigure and is running smoothly in conjunction with SpecLab and VAC-3, whic= h is needed here to convert from 135.5 to 136.0 kHz LO. With the waterfall = disabled, average CPU usage on the slow Atom Netbook is an easy 20% from on= e of two virtual CPU's (10% shown in task manager).=20 =20 Opds is running in parallel from a separate SpecLab instance. A locally gen= erated test signal showed up both in Opera (-28 dB) and in opds (-36.4 dB),= which means that the first round goes to Jose ;-) I will let both run for = a while, hoping for some weak signals to compare. =20 Best 73, Markus (DF6NM) =20 ------=_NextPart_000_0006_01CE7123.88C63C10 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable  
=20=20=20=20=20=20 =20=20=20=20=20=20

Thanks Joe. From your QTH,=20 Magdeburg should be around 60 deg azimuth (roughly northeast), so= =20 DCF39 would indeed have been significantly attenuated by the=20 loop.
 
Although generally not recommended,&nb= sp;I will now=20 try to insert the same bandpass and=20 noiseblanker before Opera to cut out the DCF telegrams, and = run=20 it in parallel to opds again.
 
Best 73,
Markus (DF6NM) 

 
From: Jo= e
Sent: Monday, June 24, 2013 7:39 PM
Subject: AW: LF: VO1NA Opera-32

Hi=20 Markus, LF

&= nbsp;

The= =20 antenna is mounted abt. 2m above the ground in my backyard abt. 20m away fr= om=20 any electrical installations.

The= =20 last nights it were pointing NW =96 SE (USA =DF->=20 Greece)

&= nbsp;

73=20 Joe

&= nbsp;

From:= Markus Vester=20

Sent: Monday,= June 24,=20 2013 10:49 AM

Subject: Re: = LF: VO1NA=20 Opera-32

 

Last night the EA5H= VK=20 Opera decoder and my opds correlation detector ran side by side here on one= =20 machine, fed by the same soundcard. Opera got the full passband (136-138.2 = kHz)=20 through SpecLab and VAC without further audio processing, whereas the other= =20 SpecLab instance for opds had a 160 Hz bandpass filter, noise blanker and a= udio=20 AGC inserted before the 0.477 mHz FFT. The QRN background from the southeas= t was=20 generally lower than the night before.

 

Results for both ar= e=20 in 
 df6nm.bplaced.net/opera/Opera_vs_opds_130623-24.txt

and a=20 screenshot
 df6nm.bplaced.net/opera/Opera_vs_opds_screenshot_130624= .jpg

 

Although SNR result= s=20 shown by Opera were consistently better than those for opds, Opera achieved= two=20 only decodes while opds produced ten hits (including three from=20 VO1NA).

 

I am wondering=20 whether this difference may have been exacerbated by the regular splatter f= rom=20 DCF39 which is quite strong in central Europe. This may also have affected = the=20 SNR estimates of either program. Maybe in this situation dedicated preproce= ssing=20 might be helpful for Opera as well?

 

We may perhaps=20 speculate that possible DCF suppression may be part of the loop advantage=20 observed by DF2JP - Joe could you comment on your loop's orientation?=20

 

Best 73,
Markus= =20 (DF6NM)


 

From: Markus Vest= er=20

Sent: Sunday,= June 23,=20 2013 1:25 PM

Subject: Re: = LF: VO1NA=20 Opera-32

 

I have downloaded=20 Opera v1.4.7 from the rosmodem website. It was easy to configure and is run= ning=20 smoothly in conjunction with SpecLab and VAC-3, which is needed here t= o=20 convert from 135.5 to 136.0 kHz LO. With the waterfall disabled, average CP= U=20 usage on the slow Atom Netbook is an easy 20% from one of two vir= tual=20 CPU's (10% shown in task manager).

 

Opds is running in= =20 parallel from a separate SpecLab instance. A locally generated test si= gnal=20 showed up both in Opera (-28 dB) and in opds (-36.4 dB), which means t= hat=20 the first round goes to Jose ;-) I will let both run for a while, hoping fo= r=20 some weak signals to compare.

 

Best=20 73,

Markus=20 (DF6NM)

 

=20=20=20=20=20
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