A form of frequency modulation in which digital information is transmitted through discrete changes of the frequency of a carrier wave.

(electronics) The band of radio frequencies from 3 to 30 hertz

(electronics) Ultra Low Frequency, the band of radio waves between 300 hertz and 3000 hertz.

(radio) The highest frequency that allows radio waves to be reflected off the ionosphere.

(telecommunications) The frequency area from 300 MHz through 3 GHz, commonly used for TV broadcasting.

(telecommunications) The frequency area from 3 GHz through 30 GHz, commonly used for microwave devices, WLAN, and radars.

Synonym of program trading

(physics) An angular frequency of one radian per Planck time.

plural of radio frequency

plural of audio frequency