Encyclopedia > Frequency-shift keying

Article Content

Frequency-shift keying

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

Note 1: Usually, the instantaneous frequency is shifted between two discrete values termed the "mark frequency[?]" and "space frequency[?]". This is a noncoherent form of FSK.

Note 2: Coherent forms of FSK exist in which there is no phase discontinuity in the output signal. Synonyms frequency-shift modulation, frequency-shift signaling.

Source: from Federal Standard 1037C and from MIL-STD-188

All Wikipedia text is available under the terms of the GNU Free Documentation License

Search Encyclopedia

Search over one million articles, find something about almost anything!

Featured Article

Battle Creek, Michigan

... of which 32.3% have children under the age of 18 living with them, 41.9% are married couples living together, 16.1% have a female householder with no husband present, and ...