Message-ID: <5A048F2E.1080305@posteo.de>
Date: Thu, 09 Nov 2017 18:23:58 +0100
From: DK7FC <selberdenken@posteo.de>
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References: <15f97a252ec.marcocadeddu@tin.it> <65d2efca-36e8-b0dc-49fb-0077056b0aa0@abelian.org>
In-Reply-To: <65d2efca-36e8-b0dc-49fb-0077056b0aa0@abelian.org>
Subject: Re: R: Re: VLF: EbNaut message over 2877 km, DK7FC to RC4HAA
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Thanks Paul, good to see.
I tried various time and frequency offsets for the wav file from last 
night and for the stacked file from the last two nights. No result.
Now i started two SpecLab instances on the RX site, one is using 
PPS+NTP, the other one DHO38. During the transmision time, DHO38 has a 
good strength and no terminator is passing, so maybe it will give better 
results, at least it will be interesting to compare.
Since i want to avoid false decodes, i changed the parameters and will 
try 2 characters again. Tonite:

*f = 8270.1000 Hz
Start time: 09.November.2017  16:00:00 UTC
Symbol period: 60 s
Characters: 2
CRC bits: 15
Coding 16K21A
Duration: 12:32
Antenna current: 620 mA

*73, Stefan


Am 09.11.2017 17:23, schrieb Paul Nicholson:
>
> Stefan wrote:
>
> > f = 8270.1000 Hz
> > Start time: 07.November.2017  16:00:00 UTC
> > Symbol period: 60 s
> > Characters: 3
> > CRC bits: 9
> > Coding 16K21A
> > Duration: 12:32
>
> > Paul, did you copy my message from last night and the night
> > before?
>
> Yes, a strong signal here and perfect decode of the 3 chars:
>
>             H-field           E-field             E+H field
>  7th/8th  10.5 dB 99.8 deg   9.0 dB 107.3 deg   12.5 dB 103.3 deg
>  8th/9th  14.1 dB 88.3 deg  12.5 dB  93.8 deg   17.3 dB  90.9 deg
>
> > I am getting no decode at RC4HAA, even when stacking both nights.
>
> Signal phase repeated fine both nights.  Given the S/N of your 2 char
> success, you would be very lucky to do 3 chars in one night, but two
> nights ought to do it.
>
> -- 
> Paul Nicholson
> -- 
>

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Thanks Paul, good to see.<br>
I tried various time and frequency offsets for the wav file from last
night and for the stacked file from the last two nights. No result.<br>
Now i started two SpecLab instances on the RX site, one is using
PPS+NTP, the other one DHO38. During the transmision time, DHO38 has a
good strength and no terminator is passing, so maybe it will give
better results, at least it will be interesting to compare.<br>
Since i want to avoid false decodes, i changed the parameters and will
try 2 characters again. Tonite:<br>
<br>
<b>f = 8270.1000 Hz<br>
Start time: 09.November.2017  16:00:00 UTC<br>
Symbol period: 60 s<br>
Characters: 2<br>
CRC bits: 15<br>
Coding 16K21A<br>
Duration: 12:32 <br>
Antenna current: 620 mA<br>
<br>
</b>73, Stefan<br>
<br>
<br>
Am 09.11.2017 17:23, schrieb Paul Nicholson:
<blockquote cite="mid:65d2efca-36e8-b0dc-49fb-0077056b0aa0@abelian.org"
 type="cite"><br>
Stefan wrote:
  <br>
  <br>
&gt; f = 8270.1000 Hz
  <br>
&gt; Start time: 07.November.2017  16:00:00 UTC
  <br>
&gt; Symbol period: 60 s
  <br>
&gt; Characters: 3
  <br>
&gt; CRC bits: 9
  <br>
&gt; Coding 16K21A
  <br>
&gt; Duration: 12:32
  <br>
  <br>
&gt; Paul, did you copy my message from last night and the night
  <br>
&gt; before?
  <br>
  <br>
Yes, a strong signal here and perfect decode of the 3 chars:
  <br>
  <br>
            H-field           E-field             E+H field
  <br>
 7th/8th  10.5 dB 99.8 deg   9.0 dB 107.3 deg   12.5 dB 103.3 deg
  <br>
 8th/9th  14.1 dB 88.3 deg  12.5 dB  93.8 deg   17.3 dB  90.9 deg
  <br>
  <br>
&gt; I am getting no decode at RC4HAA, even when stacking both nights.
  <br>
  <br>
Signal phase repeated fine both nights.  Given the S/N of your 2 char
  <br>
success, you would be very lucky to do 3 chars in one night, but two
  <br>
nights ought to do it.
  <br>
  <br>
--
  <br>
Paul Nicholson
  <br>
--
  <br>
  <br>
</blockquote>
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