The MODTEST4.EXE program allows a soundcard to drive the microphone input of a transmitter with experimental modulation. The modulation and coding has been designed specifically for EME channel characteristics to take advantage of libration fading and accommodate signal drift/dispersion. I have estimated the coding gain for the ASCII encoded signal at aprox 10db better than a morse code signal for the same transmitted letter. The transmitter should be in USB to transmit the audio modulation from the Soundcard
