Radio beacon - Dual carrier

From International Dictionary of Marine Aids to Navigation
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4-2-045

Dual carrier radio beacon

A continuous carrier radio beacon in which identification is accomplished by means of a keyed second carrier. The frequency difference between the two carriers is made equal to the desired audio frequency.


Note: The object of the system is to reduce the bandwidth of the transmission.




Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)

Languages

English

International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM

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