Search Keyword By: duplex
duplex cable
A fiber-optic cable that contains two optical fibers. [After FAA]
duplex circuit
A circuit that permits transmission in both directions. Note: For simultaneous two-way transmission, see full-duplex circuit.
duplex operation
Operating method in which transmission is possible simultaneously, in both directions of a telecommunication channel. [NTIA] [RR] Note 1: This definition is not limited to radio transmission. Note 2: In general, duplex operation and semi-duplex operation require two frequencies in radiocommunication; simplex operation may use either one or two. Synonyms full-duplex operation, two-way simultaneous operation.
duplexer
In radar systems, a device that isolates the receiver from the transmitter while permitting them to share a common antenna. Note 1: A duplexer must be designed for operation in the frequency band used by the receiver and transmitter, and must be capable of handling the output power of the transmitter. Note 2: A duplexer must provide adequate rejection of transmitter noise occurring at the receive frequency, and must be designed to operate at, or less than, the frequency separation between the transmitter and receiver. Note 3: A duplexer must provide sufficient isolation to prevent receiver desensitization.
full-duplex (FDX) circuit
A circuit that permits simultaneous transmission in both directions.
full-duplex (FDX) operation
Synonym duplex operation.
half-duplex (HDX) operation
Operation in which communication between two terminals occurs in either direction, but in only one direction at a time. Note: Half-duplex operation may occur on a half-duplex circuit or on a duplex circuit, but it may not occur on a simplex circuit. Synonyms one-way reversible operation, two-way alternate operation.
semiduplex operation
A method which is simplex operation at one end of the circuit and duplex operation at the other. RR Footnote: In general, duplex operation and semiduplex operation require two frequencies in radiocommunication; simplex operation may use either one or two. [NTIA] [RR] 2. Operation of a communications network in which a base station operates in a duplex mode with a group of remote stations operating in a half-duplex mode. Note:The terms “half-duplex” and “simplex” are used differently in wire and radio communications.