What term describes a radio that transmits and receives on two different frequencies?

What term describes a radio that transmits and receives on two different frequencies?

• A. Analog
• B. Multiplex
• C. Duplex
• D. Binary

Answer: (C)

Duplex describes a radio that transmits on one frequency and receives on a different frequency, enabling simultaneous two-way communication. This setup uses two separate channels so TX and RX can operate at the same time, often with a duplexer that keeps the strong transmit signal from overwhelming the receiver. It differs from simplex or half-duplex, where one frequency is shared or direction alternates rather than using separate TX and RX channels. Analog, multiplex, and binary refer to modulation, channel sharing methods, and data encoding, not the arrangement of transmit and receive frequencies, so they don’t fit this description.

Duplex describes a radio that transmits on one frequency and receives on a different frequency, enabling simultaneous two-way communication. This setup uses two separate channels so TX and RX can operate at the same time, often with a duplexer that keeps the strong transmit signal from overwhelming the receiver. It differs from simplex or half-duplex, where one frequency is shared or direction alternates rather than using separate TX and RX channels. Analog, multiplex, and binary refer to modulation, channel sharing methods, and data encoding, not the arrangement of transmit and receive frequencies, so they don’t fit this description.