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Frequency Shift Keyer

5963500009024 500009024 PA2.081.082

An electronic device which, in accordance with an intelligence signal, varies the frequency of a radio transmitter to which it is connected. It is generally used in the transmission of telegraph signals wherein the "MARK" signal is transmitted at a given frequency and the "SPACE" signal at a frequency displaced from the "MARK" frequency by a fixed number of hertz (usually 800). View more Frequency Shift Keyer