Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id w09K3v8N027905 for ; Tue, 9 Jan 2018 21:03:58 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1eZ03L-00007A-B5 for rs_out_1@blacksheep.org; Tue, 09 Jan 2018 19:59:19 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1eZ03K-000071-U9 for rsgb_lf_group@blacksheep.org; Tue, 09 Jan 2018 19:59:18 +0000 Received: from mail-qt0-x234.google.com ([2607:f8b0:400d:c0d::234]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1eZ03H-0007IC-9R for rsgb_lf_group@blacksheep.org; Tue, 09 Jan 2018 19:59:17 +0000 Received: by mail-qt0-x234.google.com with SMTP id m59so19338520qte.11 for ; Tue, 09 Jan 2018 11:59:15 -0800 (PST) X-DKIM-Result: Domain=gmail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=bh87HmhIcM0/QJuDwn9uwE8lq9VxtysPxs9PT0zUq1c=; b=LsnBia+Y7JWm2JKStrlYUGn70/03Kj+3Rk6ehdOEpKx/0gbCLfF0/9+DntT7gNFrki bfqLElJXFHHY9tx8yRqIXRptiwGuk8vpQghNIziNDQv0wWsbc44MO238joLgd5lhSYz/ I6MVtqRH7ntUMEmwoe9IHAABTYGg17Zf4rUk2ucdplMSwohzNW9JJj1TRTIW2UVbla1m rJ3rMI4H8PNPsocbvQcOZiTz4zi5ZYlZHYJm9jNjx6Ra4ak+caUUwTc9vryWrsmBOFzB RYOE657cPRnJmA3x6Mq95WqThyfVtioQknzCuguhtnUbT6+UfcO2XV/tS4adOvdbLSvl upng== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=bh87HmhIcM0/QJuDwn9uwE8lq9VxtysPxs9PT0zUq1c=; b=PeYxly2bcuHWztrjItg1KrPN+DjecS2PLfcBNuA9dbhXnTdVo+38AmBmK5YErZBaGS c/EN/NkaEoT9XIvhGvnTnuo07JTn1UXdurtht5SLFpVLNlDAnXqAAL6DTSUlJJSsK9uL 6Rq7oyZ5lEztYiWnVdodPv7GmqD7EUIhIM8Q0Bu3tUj4Ine8m+bKx+E6ErZSnQflsFk1 ks5FRwOxTNgMQPIsjssTREn+r2BV4uWwvcQkcApKbixUP0WvZnMjAAnS9e4M13HP3RDh ntk40VtfMQXn+gp5PSGydWkiQhoWcP2SM/3WA8peWMIdgkzeosRv17disM7FJ1MPGW85 l+Xg== X-Gm-Message-State: AKwxytfDsUaVPY4+JdqPuLgz3TrTijo6gt/xJy2PqBBx6PfSc1dWmvK7 yTKI5bO4U3nfIf3sSkix+UgvMVTC+6bWJowdFak= X-Google-Smtp-Source: ACJfBoti1MYWRSnm3jnwkJdIGepBd+wSjEvkwXP0r/EXzbKPB557pvE+gSpeU6qLUBePtbB+i/89D8RFIQQaYl9xRIc= X-Received: by 10.237.45.36 with SMTP id h33mr23839139qtd.44.1515527953811; Tue, 09 Jan 2018 11:59:13 -0800 (PST) MIME-Version: 1.0 Received: by 10.140.25.140 with HTTP; Tue, 9 Jan 2018 11:59:13 -0800 (PST) Received: by 10.140.25.140 with HTTP; Tue, 9 Jan 2018 11:59:13 -0800 (PST) In-Reply-To: <5A551AFA.9020806@posteo.de> References: <160d0cc9190-1720-7a399@webjas-vaa200.srv.aolmail.net> <5A54E3EC.30107@posteo.de> <9fb65a40-484e-2a16-152e-36428d110b79@abelian.org> <5A551AFA.9020806@posteo.de> From: Riccardo Zoli Date: Tue, 9 Jan 2018 20:59:13 +0100 Message-ID: To: LF Group X-Spam-Score: 0.3 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: :-))))) Il 09/Gen/2018 20:44, "DK7FC" ha scritto: MHz? What is that? [...] Content analysis details: (0.3 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (riccardozoli80[at]gmail.com) 0.2 FREEMAIL_ENVFROM_END_DIGIT Envelope-from freemail username ends in digit (riccardozoli80[at]gmail.com) 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid 0.0 T_REMOTE_IMAGE Message contains an external image X-Scan-Signature: 160666a84ef5d9af0d8f07b52ab8f793 Subject: Re: LF: EbNaut at 8270.01953125 Content-Type: multipart/alternative; boundary="94eb2c124a1e55a1ee05625d59c3" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: *** X-Spam-Status: No, hits=3.1 required=5.0 tests=FROM_ENDS_IN_NUMS,HTML_30_40, HTML_FONTCOLOR_UNSAFE,HTML_MESSAGE,HTML_TAG_EXISTS_TBODY, MAILTO_TO_SPAM_ADDR,SUBJ_HAS_UNIQ_ID 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 --94eb2c124a1e55a1ee05625d59c3 Content-Type: text/plain; charset="UTF-8" :-))))) Il 09/Gen/2018 20:44, "DK7FC" ha scritto: MHz? What is that? Am 09.01.2018 20:28, schrieb Andy Talbot: Just a thought The say GPSDO is delivering 16.384MHz But there's a very good chance the GPSDO itself uses a DDS, so is subject to 32 bit tuning resolution. Unless it has a 48 bit device or uses a Fract-N approach Andy G4JNT On 9 January 2018 at 19:15, Riccardo Zoli wrote: > > Hi Paul, Stefan, Andy, Markus....VLF > > My specified QRG (printed with all decimals) is obviously theoretical. It > permits, as Paul well explained, to achieve in days maximum reference phase > precision for RX stations. > The value is obtained by a simple calculation: > > my GPSDO is tuned at 16384.000 kHz and clocking a DDS programmed with a > tuning dword = 8671744. DDS output is finally divided by 4 (SDR quadrature > generator). > > ((16384000 / 2^32) * 8671744) / 4 = > *8270.01953125* > > Thanks for reports. > This night, 5th attempt. > Same parameters, start time 18:30 UTC. > > > All the best > > > 73 de Riccardo IW4DXW > > > > > > Il 09/Gen/2018 18:29, "Paul Nicholson" ha scritto: > > > It is good to know the frequency to within 1uHz for VLF > amateur radio. A 1uHz error amounts to a 30 degree > phase error after one day, enough to significantly > affect the stacking of repeats. Fortunately this is > quite easy to achieve with GPS timing. > > > Riccardo IW4DXW wrote: > > > QRG: 8270.01953125 > > 3 chars > > 60 sec/sym. > > coding 16K21A > > CRC 8 > > duration: 12h 16' > > > start time 18:30 UTC > > Todmorden (1412.5 km) > --------------------- > > 05/06 Eb/N0 +9.4 dB, S/N -24.7 dB/1Hz, phase -141.8 *Decoded* > 06/07 Eb/N0 +10.7 dB, S/N -23.4 dB/1Hz, phase 99.3 *Decoded* > 07/08 Eb/N0 +7.7 dB, H-field only, phase 178.4 *Decoded* > 08/09 Eb/N0 +5.6 dB, S/N -62.5 dB/1Hz, phase 176.2 *Decoded* > > > Bielefeld (845.3 km) > -------------------- > > 05/06 Eb/N0 -3.7 dB, S/N -37.8 dB/1Hz, phase -30.8; > 06/07 Eb/N0 +3.5 dB, S/N -30.6 dB/1Hz, phase -163.3 *Decoded* > 07/08 Eb/N0 +4.0 dB, S/N -30.1 dB/1Hz, phase -66.4 *Decoded* > 08/09 Eb/N0 -4.2 dB, S/N -38.4 dB/1Hz, phase -72.8; > > > Cumiana (370.5 km) > ------------------ > > 05/06 Eb/N0 -7.7 dB, S/N -41.8 dB/1Hz, phase 102.4; > 06/07 Eb/N0 +1.2 dB, S/N -32.9 dB/1Hz, phase -54.9 *Decoded* > 07/08 Eb/N0 -2.5 dB, S/N -36.6 dB/1Hz, phase 20.5; > 08/09 Eb/N0 -7.6 dB, S/N -41.8 dB/1Hz, phase 102.0; > > > Warsaw (1035.0 km) > ------------------ > > 05/06 Eb/N0 -4.9 dB, S/N -39.0 dB/1Hz, phase -62.3; > 06/07 Eb/N0 -15.6 dB, S/N -49.7 dB/1Hz; > 07/08 Eb/N0 -8.7 dB, S/N -42.8 dB/1Hz, phase -63.2; > 08/09 No data from rx site, uplink off; > > -- > Paul Nicholson > -- > > > Virus-free. www.avg.com --94eb2c124a1e55a1ee05625d59c3 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

:-))))= )


Il 09/Gen/2018 20:44, "DK7FC" <selberdenken@posteo.de> ha scritto:
=20
MHz? What is that?


Am 09.01.2018 20:28, schrieb Andy Talbot:
Just a thought

The say GPSDO is delivering 16.384MHz
But there's a very good chance the GPSDO itself uses a DDS, so is subject to 32 bit tuning resolution.=C2=A0 =C2=A0Unless it has a 48 bit = device or uses a=C2=A0 Fract-N approach

Andy=C2=A0 G4JNT


On 9 January 2018 at 19:15, Riccardo Zoli <riccardozoli80@gmail.com> wrote:

Hi Paul, Stefan, Andy, Markus....VLF

My specified QRG (printed with all decimals) is obviously theoretical. It permits, as Paul well explained, to achieve in days maximum reference phase precision for RX stations.
The value is obtained by a simple calculation:

my GPSDO is tuned at 16384.000 kHz and clocking a DDS programmed with a tuning dword =3D 8671744. DDS output is finally divided by 4 (SDR quadrature generator).

((16384000 / 2^32) * 8671744) / 4 =3D
8270.01953125

Thanks for reports.
This night, 5th attempt.
Same parameters, start time 18:30 UTC.


All the best


73 de Riccardo IW4DXW





Il 09/Gen/2018 18:29, "Paul Nicholson&q= uot; <vlf0403@a= belian.org> ha scritto:

It is good to know the frequency to within 1uHz for VLF
amateur radio.=C2=A0 =C2=A0A 1uHz error amounts to a 30 degree
phase error after one day, enough to significantly
affect the stacking of repeats.=C2=A0 Fortunately this is
quite easy to achieve with GPS timing.


Riccardo IW4DXW wrote:

> QRG: 8270.01953125
> 3 chars
> 60 sec/sym.
> coding 16K21A
> CRC 8
> duration: 12h 16'

>=C2=A0 start time 18:30 UTC

Todmorden (1412.5 km)
---------------------

=C2=A005/06 Eb/N0=C2=A0 +9.4 dB, S/N -24.7 dB/1Hz, phase -141.8 *Decoded* =C2=A006/07 Eb/N0 +10.7 dB, S/N -23.4 dB/1Hz, phase=C2=A0 =C2=A099.3 *Decod= ed*
=C2=A007/08 Eb/N0=C2=A0 +7.7 dB, H-field only,=C2=A0 =C2=A0 =C2=A0phase=C2= =A0 178.4 *Decoded*
=C2=A008/09 Eb/N0=C2=A0 +5.6 dB, S/N -62.5 dB/1Hz, phase=C2=A0 176.2 *Decod= ed*


Bielefeld (845.3 km)
--------------------

=C2=A005/06 Eb/N0 -3.7 dB, S/N -37.8 dB/1Hz, phase=C2=A0 -30.8;
=C2=A006/07 Eb/N0 +3.5 dB, S/N -30.6 dB/1Hz, phase -163.3 *Decoded*
=C2=A007/08 Eb/N0 +4.0 dB, S/N -30.1 dB/1Hz, phase=C2=A0 -66.4 *Decoded* =C2=A008/09 Eb/N0 -4.2 dB, S/N -38.4 dB/1Hz, phase=C2=A0 -72.8;


Cumiana (370.5 km)
------------------

=C2=A005/06 Eb/N0 -7.7 dB, S/N -41.8 dB/1Hz, phase 102.4;
=C2=A006/07 Eb/N0 +1.2 dB, S/N -32.9 dB/1Hz, phase -54.9 *Decoded*
=C2=A007/08 Eb/N0 -2.5 dB, S/N -36.6 dB/1Hz, phase=C2=A0 20.5;
=C2=A008/09 Eb/N0 -7.6 dB, S/N -41.8 dB/1Hz, phase 102.0;


Warsaw (1035.0 km)
------------------

=C2=A005/06 Eb/N0=C2=A0 -4.9 dB, S/N -39.0 dB/1Hz, phase -62.3;
=C2=A006/07 Eb/N0 -15.6 dB, S/N -49.7 dB/1Hz;
=C2=A007/08 Eb/N0=C2=A0 -8.7 dB, S/N -42.8 dB/1Hz, phase -63.2;
=C2=A008/09 No data from rx site, uplink off;

--
Paul Nicholson
--



Virus-fr= ee. www.avg.com

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