FSK or Frequency-Shift Keying is a frequency modulation scheme in which digital information is transmitted through discrete frequency changes of carrier waves.

FSK or Frequency-Shift Keying is a frequency modulation scheme in which digital information is transmitted through discrete frequency changes of carrier waves.

There are multiple implementation of FSK which can include (but not limited to):

The most common application of FSK is that of binary data, where a digital signal (comprising of 1's and 0's) is carried through a modulated carrier signal.

Stolen from wikipedia

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