What is an ARQ transmission system?
A special transmission format limited to video signals
This answer is incorrect because ARQ is not limited to video signals; it’s a general error correction method for data transmission.
A system used to encrypt command signals to an amateur radio satellite
This answer is incorrect because ARQ is not used for encrypting command signals to amateur radio satellites; it’s primarily focused on error detection and correction.
An error correction method in which the receiving station detects errors and sends a request for retransmission
This is correct because it accurately describes ARQ as an error correction method where the receiving station detects errors and requests retransmission of erroneous data.
A method of compressing data using autonomous reiterative Q codes prior to final encoding
This answer is incorrect because ARQ does not involve data compression or the use of Q codes for encoding; it is focused on error detection and requesting retransmissions.
Explanation
Automatic Repeat reQuest (ARQ) is a fundamental component of data communication systems, crucial for ensuring information is transmitted accurately between stations or devices. In an ARQ transmission system, the receiving station plays an active role in verifying data integrity. When data is received, the system performs error-checking procedures. If errors or discrepancies are detected in the received data, the receiving station sends a request for retransmission of the corrupt data packets to the sending station. This ensures that the transmitted information is received correctly, making ARQ an essential feature in reliable communication protocols. Understanding ARQ is important for radio amateurs who may be involved in digital communication modes, where maintaining data integrity over long distances or through challenging transmission conditions is critical. This question tests comprehension of a key concept in error correction and data integrity within the world of amateur radio.
T8D11 2022-2026