From: <hvanesce@comcast.net>
To: <rsgb_lf_group@blacksheep.org>
References: <2dbcd2a8-0109-41e4-c0ca-aada17f54de8@abelian.org> <5A2D886D.5060109@posteo.de> <5A31249C.2040307@posteo.de> <5A326AAE.7020808@posteo.de> <6b23a798-f28e-828c-bd8a-43ba8af0fb6a@abelian.org> <346e5dfe-da5f-79e9-c097-e3012a3b74bd@abelian.org> <5A344E83.3020308@posteo.de> <5A37BB18.4090806@posteo.de> <79b53aa1-0fa7-d02c-34bf-5b2e3b7bdddb@abelian.org> <5A381F2B.7000304@posteo.de> <3871624a-11dc-12b8-853c-8454840ca9ff@abelian.org> <5A398786.7000001@posteo.de> <5A398906.9000806@posteo.de> <6833b8ea-5cf8-809e-364e-a9f47e04bc44@abelian.org> <5A3D1058.2060801@posteo.de> <17640699-682a-2d4e-6c5f-8fa14d411530@abelian.org> <5A3DA439.2070503@posteo.de> <1baa9683-37de-2f96-5909-8138b10f0a8b@abelian.org> <5A43A659.9050006@posteo.de> <f25c1a9c-af08-70d0-59bf-314c04085513@abelian.org> <037a01d38031$1f453b20$5dcfb160$@comcast.net> <f290ae55-dfaa-fa3c-e4bc-ced7269bcad9@abelian.org> <5A479376.2060804@posteo.de> <4ac90a6f-6a7b-5ae4-3b4a-d8cb8e153599@abelian.org> <1e63b6ca-ae5c-176a-b9fa-1f035e5cc72e@abelian
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In-Reply-To: <1e63b6ca-ae5c-176a-b9fa-1f035e5cc72e@abelian.org>
Date: Wed, 3 Jan 2018 14:53:05 -0500
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Subject: RE: VLF: Finally back on the 58 km band...
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Stefan and Paul, 

Nice work! 

A technical question: I notice ~ 9dB lower Eb/N0 than the 1-character December 28th result (in Todmorden and Bielefeld); is this essentially from an approximately 12x increase in character rate?
Or does the symbol period independently also affect Eb/N0 in this case? 

73,

Jim AA5BW   

-----Original Message-----
From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Paul Nicholson
Sent: Wednesday, January 3, 2018 6:06 AM
To: rsgb_lf_group@blacksheep.org
Subject: Re: VLF: Finally back on the 58 km band...


Stefan wrote:

 > f = 5170.1000 Hz
 > Start time: 29.Dec.2017  15:00:00 UTC  > Symbol period: 30 s  > Characters: 12  > CRC bits: 20  > Coding 16K21A  > Duration: 14:56 [hh:mm]

Todmorden (881.2 km)
--------------------

  29/30 Eb/N0 +2.8 dB, S/N -26.2 dB/1Hz, phase 46.1 *Decoded*
  30/31 Eb/N0 +4.1 dB, S/N -24.9 dB/1Hz, phase 44.2 *Decoded*
  31/01 Eb/N0 +1.8 dB, S/N -27.1 dB/1Hz, phase 43.2 *Decoded*
  01/02 Eb/N0 +1.5 dB, S/N -27.5 dB/1Hz, phase 57.6 *Decoded*
  02/03 Eb/N0 -1.6 dB, S/N -30.6 dB/1Hz, phase 60.6;

Bielefeld (303.8 km DL4YHF)
---------------------------

  29/30 Eb/N0 +8.6 dB, S/N -20.4 dB/1Hz, phase -53.5 *Decoded*
  30/31 Eb/N0 +8.3 dB, S/N -20.6 dB/1Hz, phase -52.1 *Decoded*
  31/01 Eb/N0 +8.1 dB, S/N -20.8 dB/1Hz, phase -56.3 *Decoded*
  01/02 Eb/N0 +8.4 dB, S/N -20.6 dB/1Hz, phase -47.9 *Decoded*
  02/03 Eb/N0 +4.0 dB, S/N -24.9 dB/1Hz, phase -38.1 *Decoded*

Warsaw (919.3 km SQ5BPF)
------------------------

  29/30 Eb/N0  -5.4 dB, S/N -34.4 dB/1Hz, phase -20.3;
  30/31 Eb/N0 -17.2 dB, S/N -46.2 dB/1Hz;
  31/01 Eb/N0  -7.8 dB, S/N -36.8 dB/1Hz, phase -44.2;
  01/02 Eb/N0  -6.1 dB, S/N -35.1 dB/1Hz, phase -36.1;
  02/03 Eb/N0  -8.2 dB, S/N -37.1 dB/1Hz, phase   2.9;

  Five stacked: Eb/N0 -2.1 dB

Cumiana (504.6 km IK1QFK)
-------------------------

  29/30 Eb/N0 -5.4 dB, S/N -34.3 dB/1Hz, phase  176.7;
  30/31 Eb/N0 -1.3 dB, S/N -30.3 dB/1Hz, phase -176.2;
  31/01 Eb/N0 -4.9 dB, S/N -33.9 dB/1Hz, phase  177.4;
  01/02 No data from rx site, ADSL fault;
  02/03 No data from rx site, ADSL fault;

  Three stacked: Eb/N0 1.1 dB *Decoded*

--
Paul Nicholson
--