[Laser] WOLF-GUI program

[F1AVYopto at aol.com]

James
WOLF-GUI is basically a previously well  chosen single frequency program.
I am not a protocol specialist but it seems  to me this program is very 
complex.
I did tests at 20 Hz 75 Hz and 175 Hz  normal speed and quarter speed.
I used first two PC in a dark room with a PGP  RX and a small optical TX with 
a red LED that light can be reduced by a  potentiometer until to be 
absolutely not viewable.
The first step mandatory  to use WOLF GUI is to calibrate the sound cards.
For local test the best way  I found is to send a 2500 Hz tune each PC from 
external loud speaker and measure  it each PC via the microphones.(This 2500 Hz 
tune can be called the "known  reference frequency").
For laser DX, a FM radio link or a phone link can be  used previously for the 
calibration.
WOLF can gives a very good reading of  the "real" received frequency tune one 
each PC.
Theses frequencies  must respectively be entered in the RX sample rate 
calibration window on  each PC (E.g. 2499.52 Hz and 2501.2 Hz can be called the 
"displayed audio  frequencies").
The first tests showed the program is so sensitive that it is  impossible to 
find the sensitivity limits if the PCs are on the same main lines  because 
signals are exchanged by the common grown and cables radiation, even if  the PCs 
are to more than 10 m from one to the other.
A portable PC and a  battery powered LED TX is mandatory to have a good 
isolation.
A good level  indication is the number of lines before the first message 
decoding.
It is  possible to decode messages that give absolutely no picture in the 
waterfall  after 10 mn.
It is possible to decode message after 30 mn or more.
At this  level the signal is so small that its real level escapes the 
calculations.  
The best sensitivity limit has been found at quarter speed 175 Hz.
In  2006 we succeed a 40 Km cloud bounce laser QSO with only 4 to 5 lines 
before to  decode the message at normal speed 175 Hz.
You suggest a multi channels  system on separate frequencies.
You can write to Wolf sn at SCGROUP.COM to ask  him about all his program 
details.
He always answers my mails very kindly  with lot of information. 
73 Yves