Message-ID: <5AE31B8E.70509@posteo.de>
Date: Fri, 27 Apr 2018 14:46:06 +0200
From: DK7FC <selberdenken@posteo.de>
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References: <CANA3B6XBxfTFARn+j1mOMqz3Q4tou7cYDpJFaqTz+GOzHHhsdA@mail.gmail.com> <5AE1F52D.6040304@posteo.de> <CANA3B6XnfZWcjEFkd-82aKE45u76zS_MRXdPptykGCZJPZDQ4A@mail.gmail.com>
In-Reply-To: <CANA3B6XnfZWcjEFkd-82aKE45u76zS_MRXdPptykGCZJPZDQ4A@mail.gmail.com>
Subject: Re: VLF: carrier at 8270.003
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Hello Riccardo,

Looks good. I see you know how to set things up.

73 from JO33UC14
Stefan


Am 27.04.2018 09:45, schrieb Riccardo Zoli:
> Hi VLF,
>
> Stefan and Paul, many thanks for reports.
> Ok, Stefan, great! I'm on air again (in this moment with 620 mA) 
> testing a configuration based on your suggestions.
> I made a simple watch plot with antenna current and phase correction 
> (the antenna is now a little shacked, it's a quite windy day here), 
> but I have to optimize the protection statements.
> A screenshot of SpecLab attached.
>
> Have a good day
>
>
> 73 de Riccardo IW4DXW
>
>
> Il Gio 26 Apr 2018, 17:54 DK7FC <selberdenken@posteo.de 
> <mailto:selberdenken@posteo.de>> ha scritto:
>
>     Hi Riccardo,
>
>     Your signal is well visible here on my grabber
>     http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html
>
>     Am 26.04.2018 13:04, schrieb Riccardo Zoli:
>>
>>     Hi VLF,
>>
>>     A new carrier test is running with about 610mA.
>>     Now, with last SL version, the PLL configuration made by Markus
>>     seems to works well here, the phase is stable. I started this
>>     test yesterday at about 10:00 UTC.
>>     I'm looking for an adequate conditional statement that permits to
>>     inhibit the audio (and the TX) in case of an excess of antenna
>>     current drop. Any suggestion?
>     Yes, sure, this is what i'm using all the time here.
>     First you need to calculate the antenna current from the signal level
>
>     I use: *s=1820*(10^((peak_a((sgf-10),(sgf+10)))/20)) *
>     s= antenna current in mA
>     sgf=transmit frequency (signal generator frequency)
>     1820 is just a calibration factor to calibrate the value to mA.
>     The If condition is 1, so it is executed on each FFT, which means
>     each 200 ms.
>     Then i define a traget current with the parameter d: d=600 (for
>     example)
>     Next i define a current limit L, say 100 mA
>     Now if the actual current s drops L mA below the target value d,
>     then another parameter e, which is a counter level, is increased.
>     After 200 ms the measurements are repeated and if the current is
>     still to low, e is increased again.
>     Oh and there is another parameter c, which regulates the output
>     amplitude.
>     If e exceeds a certain value (i choose 5), the c is set to 0, so
>     the output amplitude becomes 0.
>
>     Actually the complete procedure is much more complex, i just
>     described the safety function.
>     If you like, i can send you a usr file for TXing carriers and
>     EbNaut...
>
>     73, Stefan
>
>>     My current VLF condx attached.
>>
>>     All the best
>>
>>
>>     73 de Riccardo IW4DXW
>>
>>
>>
>>

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Hello Riccardo, <br>
<br>
Looks good. I see you know how to set things up. <br>
<br>
73 from JO33UC14<br>
Stefan<br>
<br>
<br>
<br>
Am 27.04.2018 09:45, schrieb Riccardo Zoli:
<blockquote
 cite="mid:CANA3B6XnfZWcjEFkd-82aKE45u76zS_MRXdPptykGCZJPZDQ4A@mail.gmail.com"
 type="cite">
  <div dir="auto">
  <div dir="auto">Hi VLF,</div>
  <div dir="auto"><br>
  </div>
  <div dir="auto">Stefan and Paul, many thanks for reports.</div>
  <div dir="auto">Ok, Stefan, great! I'm on air again (in this moment
with 620 mA) testing a configuration based on your suggestions.</div>
  <div dir="auto">I made a simple watch plot with antenna current and
phase correction (the antenna is now a little shacked, it's a quite
windy day here), but I have to optimize the protection statements.</div>
  <div dir="auto">A screenshot of SpecLab attached.</div>
  <div dir="auto"><br>
  </div>
  <div dir="auto">Have a good day</div>
  <div dir="auto"><br>
  </div>
  <div dir="auto"><br>
  </div>
  <div dir="auto">73 de Riccardo IW4DXW</div>
  <div dir="auto"><br>
  </div>
  </div>
  <br>
  <div class="gmail_quote">
  <div dir="ltr">Il Gio 26 Apr 2018, 17:54 DK7FC &lt;<a
 moz-do-not-send="true" href="mailto:selberdenken@posteo.de"
 target="_blank" rel="noreferrer">selberdenken@posteo.de</a>&gt; ha
scritto:<br>
  </div>
  <blockquote class="gmail_quote"
 style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
    <div bgcolor="#ffffff" text="#000000">Hi Riccardo, <br>
    <br>
Your signal is well visible here on my grabber
    <a moz-do-not-send="true"
 class="m_2873179539323361480m_4166429871234802224moz-txt-link-freetext"
 href="http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html"
 rel="noreferrer noreferrer" target="_blank">http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html</a><br>
    <br>
Am 26.04.2018 13:04, schrieb Riccardo Zoli:
    <blockquote type="cite">
      <div dir="ltr">
      <div dir="auto">
      <div dir="auto"><br>
      </div>
      <div dir="auto">Hi VLF,</div>
      <div dir="auto"><br>
      </div>
      <div dir="auto">A new carrier test is running with about 610mA.</div>
      <div dir="auto">Now, with last SL version, the PLL configuration
made
by Markus seems to works well here, the phase is stable. I started this
test yesterday at about 10:00 UTC.</div>
      <div>I'm looking for an adequate conditional statement that
permits
to inhibit the audio (and the TX) in case of an excess of antenna
current drop. Any suggestion?</div>
      </div>
      </div>
    </blockquote>
Yes, sure, this is what i'm using all the time here.<br>
First you need to calculate the antenna current from the signal level<br>
    <br>
I use: <b>s=1820*(10^((peak_a((sgf-10),(sgf+10)))/20)) </b><br>
s= antenna current in mA<br>
sgf=transmit frequency (signal generator frequency)<br>
1820 is just a calibration factor to calibrate the value to mA.<br>
The If condition is 1, so it is executed on each FFT, which means each
200 ms.<br>
Then i define a traget current with the parameter d: d=600 (for example)<br>
Next i define a current limit L, say 100 mA<br>
Now if the actual current s drops L mA below the target value d, then
another parameter e, which is a counter level, is increased.<br>
After 200 ms the measurements are repeated and if the current is still
to low, e is increased again. <br>
Oh and there is another parameter c, which regulates the output
amplitude.<br>
If e exceeds a certain value (i choose 5), the c is set to 0, so the
output amplitude becomes 0.<br>
    <br>
Actually the complete procedure is much more complex, i just described
the safety function.<br>
If you like, i can send you a usr file for TXing carriers and EbNaut...<br>
    <br>
73, Stefan<br>
    <br>
    <blockquote type="cite">
      <div dir="ltr">
      <div dir="auto">
      <div>My current VLF condx attached.</div>
      <div><br>
      </div>
      <div>All the best</div>
      <div><br>
      </div>
      <div><br>
      </div>
      <div>73 de Riccardo IW4DXW</div>
      <div><br>
      </div>
      <div><br>
      </div>
      <div><br>
      </div>
      <div><br>
      </div>
      </div>
      </div>
    </blockquote>
    </div>
  </blockquote>
  </div>
</blockquote>
</body>
</html>

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