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Date: Fri, 13 May 2016 02:04:35 +0200
From: DK7FC <selberdenken@posteo.de>
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References: <40b8e5c6692149a7911fe77631ebb33b@kabelmail.de> <572BB679.2040107@posteo.de> <572BE449.5010806@abelian.org> <279E0DEFDAFA4C849152DBBA3BFEDE8C@White> <572C5E72.7010404@posteo.de> <912731037.20160506233059@mterrier.net> <572D1111.9030302@posteo.de> <572D9843.7060402@abelian.org> <572DBBD3.3020709@posteo.de> <572DC660.5050007@abelian.org> <572E4BF7.1060103@posteo.de> <572F9120.2010200@abelian.org> <5732F442.2050105@posteo.de> <5732F9E8.1090604@abelian.org> <57343F5D.5030502@posteo.de> <5734D996.8080203@abelian.org>
In-Reply-To: <5734D996.8080203@abelian.org>
Subject: Re: VLF: EbNaut transmissions on lower frequencies?, pre-tests: 6.47kHz
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Hi Paul,

Thanks! :-) That is correct!!! But why is the Eb/N0 so high, just the 
low QRN in the morning? Impressing!
I'll continue with a longer message. Before i go to 5.17 kHz i would 
like to pass a longer message through, like 20 chars or so.
But now let's try 6:

*f = 6470.00000 Hz
Start time: 13.05.2016   00:00:02 UTC
Symbol length: 100 s
Characters: 6
CRC 16
Coding 8K19A
Duration: 15h, 33m, 20s*
*Antenna current: 200 mA*

I'm watching the input signal of my feed back probe. It shows how the 
antenna current varies with rain and temperature (affects the resonance 
frequency). An inofficial capture is at 
http://www.iup.uni-heidelberg.de/schaefer_vlf/VLF/TX.jpg . -37.5 dB 
equals 186 mA.

73, Stefan


Am 12.05.2016 21:29, schrieb Paul Nicholson:
>
> > f = 6470.00000 Hz
> > Start time: 12.05.2016   00:00:02 UTC
> > Symbol length: 100 s
> > Characters: 3
> > CRC 16
> > Coding 8K19A
>
> Copied 'UFB' Eb/N0 = +5.1 dB.
>
> Carrier S/N: 11.21 dB in 24.0 uHz
>
> -- 
> Paul Nicholson
> -- 
>
>

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Hi Paul, <br>
<br>
Thanks! :-) That is correct!!! But why is the Eb/N0 so high, just the
low QRN in the morning? Impressing!<br>
I'll continue with a longer message. Before i go to 5.17 kHz i would
like to pass a longer message through, like 20 chars or so.<br>
But now let's try 6:<br>
<br>
<big><b>f = 6470.00000 Hz<br>
Start time: 13.05.2016   00:00:02 UTC<br>
Symbol length: 100 s<br>
Characters: 6<br>
CRC 16<br>
Coding 8K19A<br>
Duration: 15h, 33m, 20s</b></big><br>
<big><b>Antenna current: 200 mA</b></big><br>
<br>
I'm watching the input signal of my feed back probe. It shows how the
antenna current varies with rain and temperature (affects the resonance
frequency). An inofficial capture is at
<a class="moz-txt-link-freetext" href="http://www.iup.uni-heidelberg.de/schaefer_vlf/VLF/TX.jpg">http://www.iup.uni-heidelberg.de/schaefer_vlf/VLF/TX.jpg</a> . -37.5 dB
equals 186 mA.<br>
<br>
73, Stefan<br>
<br>
<br>
Am 12.05.2016 21:29, schrieb Paul Nicholson:
<blockquote cite="mid:5734D996.8080203@abelian.org" type="cite"><br>
&gt; f = 6470.00000 Hz
  <br>
&gt; Start time: 12.05.2016   00:00:02 UTC
  <br>
&gt; Symbol length: 100 s
  <br>
&gt; Characters: 3
  <br>
&gt; CRC 16
  <br>
&gt; Coding 8K19A
  <br>
  <br>
Copied 'UFB' Eb/N0 = +5.1 dB.
  <br>
  <br>
Carrier S/N: 11.21 dB in 24.0 uHz
  <br>
  <br>
--
  <br>
Paul Nicholson
  <br>
--
  <br>
  <br>
  <br>
</blockquote>
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