In aviation communications, duplex refers to which arrangement?

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Study for the Pilot's Handbook of Aeronautical Knowledge Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

In aviation communications, duplex refers to which arrangement?

Explanation:
Two-way radio operation uses two separate channels: one for transmit and one for receive. In a duplex setup, the aircraft radios transmit on one frequency and receive on another, allowing you to talk and listen at the same time. A duplexer shares the antenna while keeping the two signals from interfering. If the same frequency were used for both directions, you'd have to switch between talking and listening (half-duplex) or cause self-interference, which is not what duplex describes.

Two-way radio operation uses two separate channels: one for transmit and one for receive. In a duplex setup, the aircraft radios transmit on one frequency and receive on another, allowing you to talk and listen at the same time. A duplexer shares the antenna while keeping the two signals from interfering. If the same frequency were used for both directions, you'd have to switch between talking and listening (half-duplex) or cause self-interference, which is not what duplex describes.

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