Frequency Shift Keying (FSK) - Digital To Analog Conversion and Transmission Tutorials Part III
https://ingenuitydias.blogspot.com/2014/04/frequency-shift-keying-fsk-digital-to.html
The digital data stream changes the frequency of the carrier signal, fc. For example, a “1” could be represented by f1=fc +Df, and a “0” co...