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Date: Sun, 29 Dec 2013 17:22:50 +0100
From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= <Stefan.Schaefer@iup.uni-heidelberg.de>
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Subject: Re: LF: VLF exciter / signal generation in Spectrum Lab
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Oh dear, solutions over solutions but just one problem! Help! :-)

Well, there are 3 PCs running for VLF/LF/MF 24/7/365. One PC is just for 
transmitting on LF/VLF. That one will generate the permanent tone, 
nothing else. The only and most important thing is that this PC 
generates no phase glitch. The second PC will generate the tone for the 
VOX. It offers a headphone jack on a front panel in the shack which i 
use for MF CW. It's already decoupled by a AF isolating transformer. 
Here the VOX circuit will be connected...

73, Stefan

Am 29.12.2013 13:31, schrieb wolf_dl4yhf:
> Hello Markus, Stefan, and the group,
>
>
> Am 29.12.2013 12:42, schrieb Markus Vester:
>> One channel sends a continuous uninterrupted 17.94 kHz tone to the 
>> divider, the other channel conveys modulated Opera at an arbitrary 
>> frequency to a VOX rectifier. 
>
> Indeed, this option is now selectable in SL by selecting 'Auxiliary 
> output: unmodulated coherent carrier' on the digimode configuration 
> screen. Details at
>
> http://www.qsl.net/dl4yhf/speclab/digiterm.htm#adv_settings
>
> I only checked it with ASK (amplitude shift keying) yet but it should 
> work with PSK too. Would be an interesting experiment to send 
> Opera-encoded bitstreams as binary PSK... :o) if we already had an 
> optimized decoder for it.
>
> The problem with very long commands (to send blocks of data through 
> the digimode terminal), as noted by Stefan, has now been fixed. The 
> string of "zeroes and ones" can be up to 1023 characters long now.
>
> V2.79 b9 can be downloaded from
> http://dl4yhf.ssl7.com/speclab/install_speclab.zip
>
> Please keep a copy of your 'working' version because not all of the 
> new functions in SL have been properly tested yet, and there may be a 
> couple of bugs lurking in less frequently used subroutines.
>
> 73,
>   Wolf .
>

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Oh dear, solutions over solutions but just one problem! Help! :-)<br>
<br>
Well, there are 3 PCs running for VLF/LF/MF 24/7/365. One PC is just
for transmitting on LF/VLF. That one will generate the permanent tone,
nothing else. The only and most important thing is that this PC
generates no phase glitch. The second PC will generate the tone for the
VOX. It offers a headphone jack on a front panel in the shack which i
use for MF CW. It's already decoupled by a AF isolating transformer.
Here the VOX circuit will be connected...<br>
<br>
73, Stefan<br>
<br>
Am 29.12.2013 13:31, schrieb wolf_dl4yhf:
<blockquote cite="mid:52C0163B.5030504@freenet.de" type="cite">
  <meta content="text/html; charset=ISO-8859-1"
 http-equiv="Content-Type">
  <div class="moz-cite-prefix">Hello Markus, Stefan, and the group,<br>
  <br>
  <br>
Am 29.12.2013 12:42, schrieb Markus Vester:<br>
  </div>
  <blockquote cite="mid:80BAE827E26041D293D7836651E4595A@White"
 type="cite">
    <meta content="text/html; charset=ISO-8859-1"
 http-equiv="Content-Type">
    <meta name="GENERATOR" content="MSHTML 8.00.6001.23543">
  </blockquote>
  <blockquote cite="mid:80BAE827E26041D293D7836651E4595A@White"
 type="cite"><font face="Arial" size="2">One channel&nbsp;sends a continuous
uninterrupted 17.94 kHz tone to the divider, the other channel conveys
modulated Opera&nbsp;at an arbitrary frequency&nbsp;to a&nbsp;VOX rectifier.</font> </blockquote>
  <br>
Indeed, this option is now selectable in SL by selecting 'Auxiliary
output: unmodulated coherent carrier' on the digimode configuration
screen. Details at<br>
  <br>
  <a moz-do-not-send="true" class="moz-txt-link-freetext"
 href="http://www.qsl.net/dl4yhf/speclab/digiterm.htm#adv_settings">http://www.qsl.net/dl4yhf/speclab/digiterm.htm#adv_settings</a><br>
  <br>
I only checked it with ASK (amplitude shift keying) yet but it should
work with PSK too. Would be an interesting experiment to send
Opera-encoded bitstreams as binary PSK... :o) if we already had an
optimized decoder for it.<br>
  <br>
The problem with very long commands (to send blocks of data through the
digimode terminal), as noted by Stefan, has now been fixed. The string
of "zeroes and ones" can be up to 1023 characters long now.<br>
  <br>
V2.79 b9 can be downloaded from <br>
&nbsp;<a moz-do-not-send="true" class="moz-txt-link-freetext"
 href="http://dl4yhf.ssl7.com/speclab/install_speclab.zip">http://dl4yhf.ssl7.com/speclab/install_speclab.zip</a>
  <br>
  <br>
Please keep a copy of your 'working' version because not all of the new
functions in SL have been properly tested yet, and there may be a
couple of bugs lurking in less frequently used subroutines.<br>
  <br>
73,<br>
&nbsp; Wolf .<br>
  <br>
</blockquote>
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