BS EN 50157-2-3 discusses domestic and similar electronic equipment interconnection requirements and AV link with a focus on basic system oriented commands. By sending AV link system oriented commands a device may control some basic functions of other devices. For instance an AV link television may control some functions of an AV link video cassette recorder.
BS EN 50157-2-3 is the second part of the BS EN 50157-2 multi-series on domestic and similar electronic equipment that specifies the AV link mode 3 communication protocols. Within the protocol a 3-bit “Application identifier” is present. If a company wishes to use the mode 3 protocol for its own application an “Application identifier” code can be allocated by EACEM Secretariat
BS EN 50157-2-3 on domestic and similar electronic equipment AV link is useful for:
AV link mode 3 is an audio/video communication system AV link mode 3 devices communicate with each other by sending and receiving <AV link mode 3> messages. The communication of AV link takes place via contact 10 of the peritelevision connector as specified in EN 50049-1.
BS EN 50157-2-3 describes the physical medium through which basic AV link commands may be communicated from one device to another. The physical layer is described in EN 50049-1 and EN 50157-2-1. Contact 10 forms a control signal line connecting all devices within the AV link chain.