Frequency-shift keying

Frequency-shift keying (FSK) is a form of frequency modulation in which the modulating signal shifts the output frequency between predetermined values.

Related Topics:
Frequency modulation - Signal - Output

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Usually, the instantaneous frequency is shifted between two discrete values termed the mark frequency and the space frequency. This is a noncoherent form of FSK.

Related Topics:
Mark frequency - Space frequency

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Coherent forms of FSK exist in which there is no phase discontinuity in the output signal.

Related Topics:
Coherent - Phase

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Other names for FSK are frequency-shift modulation and frequency-shift signaling.

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