Frequency Shift Keying


Frequency Shift Keying

(communications)(FSK) The use of frequency modulation totransmit digital data, i.e. two different carrierfrequencies are used to represent zero and one.

FSK was originally used to transmit teleprinter messages byradio (RTTY) but can be used for most other types of radioand land-line digital telegraphy. More than two frequenciescan be used to increase transmission rates.