noun, Electronics, Radio.
a method of transmitting information using a radio-frequency carrier wave. The frequency of the carrier wave is varied in accordance with the amplitude and polarity of the input signal, the amplitude of the carrier remaining unchanged FM Compare amplitude modulation
A method of transmitting signals, especially in radio broadcasting, in which the value of the signal is given by the frequency of a high frequency carrier wave. In FM radio transmission, for example, the signal to be carried is a sound wave, and its increasing and decreasing value is reflected in the increasing and decreasing frequency of a radio frequency carrier wave. Compare amplitude modulation.
frequency modulation (FM)
A type of radio signal in which the frequency of the radio wave is varied to carry information from the transmitter to the receiver. (Compare amplitude modulation (AM).)
noun, Statistics. 1. a frequency curve consisting of connected line segments formed by joining the midpoints of the upper edges of the rectangles in a histogram whose class intervals are of uniform length.
noun, Electronics. 1. the effectiveness with which a circuit, device, or system processes and transmits signals fed into it, as a function of the signal frequency. 2. Also called frequency-response curve. a graph of frequency response, with signal amplitude or gain plotted against frequency.
- 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 […]
- Frequency table
noun a statistical record of how often each value in a set of data occurs Examples A frequency table is used to summarize categorical, nominal, and ordinal data.