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H6 - Federal Item Name Directory
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19349
KEYER,FREQUENCY SHIFT
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FIIG: A32200
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Entry Date: Apr-01-1974
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Concept:
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Status: A
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Applicability: L
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Type: 0
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Definition: 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).
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Corresponding NIINs: 143
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