Frequency Shift Keying

communications (FSK) The use of frequency modulation to

transmit digital data, i.e. two different carrier

frequencies are used to represent zero and one.

FSK was originally used to transmit teleprinter messages by

radio (RTTY) but can be used for most other types of radio

and land-line digital telegraphy. More than two frequencies

can be used to increase transmission rates.

(1997-07-14)