Message-ID: <5C8D0DC4.8040906@posteo.de>
Date: Sat, 16 Mar 2019 15:52:52 +0100
From: DK7FC <selberdenken@posteo.de>
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To: rsgb_lf_group@blacksheep.org
References: <1152205965.5940973.1552739052081.ref@mail.yahoo.com> <1152205965.5940973.1552739052081@mail.yahoo.com> <38dc034a-f8ae-23b8-4b44-146723794c8f@abelian.org>
In-Reply-To: <38dc034a-f8ae-23b8-4b44-146723794c8f@abelian.org>
Subject: Re: VLF: EbNaut message announcement @ 5170
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Hello Markus and Paul, VLF,

Many thanks for the feedback. What a great result!
Paul, after the EbNaut transmission i sent '73' in DFCW-90, which is a 
typical mode for LF operation. Do you see the message in a spectrogram, 
like Markus did at DL0AO? Best setting may be something like 20 mHz and 
10 sec/pixel.

On my tree (meanwhile shutdown because the old accu is empty!) the E 
field is still not really usable but the loops work very well on that 
frequency. Mixing both loops and optimising the settings gives *carrier 
S/N: 48.05 dB in 282.5* uHz for the carrier transmission!
So i could see a clear trace from a 1 W transmitter!

I'll produce a spectrogram from the postprocessed data...

Maybe Jacek got something too? :-)

73, TNX, Stefan


Am 16.03.2019 15:29, schrieb Paul Nicholson:
>
> Stefan wrote:
>
> > The carrier is now running since 09:31 UTC at 5170.1 Hz.
>
> Enormous signal here -
>
>  http://abelian.org/vlf/tmp/190316a.png
>
> S/N 33.6 dB in 278uHz, -2dB in 1Hz, -36dB in 2.5kHz.
>
> > Message:
> > *f = 5170.1 Hz
>
> > Symbol period: 2 s
> > Characters: 14
> > CRC bits: 14
> > Coding 16K21A
>
> > start at 10:30:00.3 UTC.
>
> Decoded rank 0 BER 8.9% constant reference phase.
>
> carrier Eb/N0: 10.3 dB
> carrier S/N: 29.3 dB in 264.8 uHz, -6.5 dB in 1Hz, -40.5 dB in 2.5kHz
>
> -- 
> Paul Nicholson
> -- 
>

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Hello Markus and Paul, VLF,<br>
<br>
Many thanks for the feedback. What a great result! <br>
Paul, after the EbNaut transmission i sent '73' in DFCW-90, which is a
typical mode for LF operation. Do you see the message in a spectrogram,
like Markus did at DL0AO? Best setting may be something like 20 mHz and
10 sec/pixel.<br>
<br>
On my tree (meanwhile shutdown because the old accu is empty!) the E
field is still not really usable but the loops work very well on that
frequency. Mixing both loops and optimising the settings gives <b>carrier
S/N: 48.05 dB in 282.5</b> uHz for the carrier transmission!<br>
So i could see a clear trace from a 1 W transmitter!<br>
<br>
I'll produce a spectrogram from the postprocessed data...<br>
<br>
Maybe Jacek got something too? :-)<br>
<br>
73, TNX, Stefan<br>
<br>
<br>
Am 16.03.2019 15:29, schrieb Paul Nicholson:
<blockquote cite="mid:38dc034a-f8ae-23b8-4b44-146723794c8f@abelian.org"
 type="cite"><br>
Stefan wrote:
  <br>
  <br>
&gt; The carrier is now running since 09:31 UTC at 5170.1 Hz.
  <br>
  <br>
Enormous signal here -
  <br>
  <br>
 <a class="moz-txt-link-freetext" href="http://abelian.org/vlf/tmp/190316a.png">http://abelian.org/vlf/tmp/190316a.png</a>
  <br>
  <br>
S/N 33.6 dB in 278uHz, -2dB in 1Hz, -36dB in 2.5kHz.
  <br>
  <br>
&gt; Message:
  <br>
&gt; *f = 5170.1 Hz
  <br>
  <br>
&gt; Symbol period: 2 s
  <br>
&gt; Characters: 14
  <br>
&gt; CRC bits: 14
  <br>
&gt; Coding 16K21A
  <br>
  <br>
&gt; start at 10:30:00.3 UTC.
  <br>
  <br>
Decoded rank 0 BER 8.9% constant reference phase.
  <br>
  <br>
carrier Eb/N0: 10.3 dB
  <br>
carrier S/N: 29.3 dB in 264.8 uHz, -6.5 dB in 1Hz, -40.5 dB in 2.5kHz
  <br>
  <br>
--
  <br>
Paul Nicholson
  <br>
--
  <br>
  <br>
</blockquote>
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