Radio Amateur Quiz Canadian License

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Question A-005-008-005

What type of error control system is used in AMTOR ARQ (Mode A)?

Correct Answer

The receiving station automatically requests repeats when needed

Explanation

AMTOR ARQ (Automatic Repeat reQuest, Mode A) is a synchronous system where data is sent in short blocks. The receiving station acknowledges correct blocks (ACK) or requests retransmission if errors are detected (NAK).

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