From the Ten-Tec Reflector January 20, 2005
This is very simple requiring only a steady signal source (i.e. no noise sources, Spectrogram plots, etc.)
73, Bill W4ZV
Alternate method for adjusting the 250Hz and 500Hz CF Using Spectrogram
John Grebenkemper, KI6WX that will help with the initial setting of the program.
Here is a short Youtube video depicting what I'm trying to describe above http://youtu.be/7Pcp4pU2VwM
73, Fernando N2FQ/6