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Saturday, June 25, 2011
DisplayPort Standard to Support Active Cables


The Video Electronics Standards Association (VESA) has announced an extension of its DisplayPort version 1.2 standard to support DisplayPort active cables.

DisplayPort active cables can be as much as 5x in length compared to passive cables, providing video systems integrators and home users flexibility for designing home theaters, digital signage and high-definition display configurations. Design specifications are immediately available from VESA for organizations seeking to develop DisplayPort active cables.

Active cables boost and equalize the attenuated DisplayPort signal, allowing cables to reach increased lengths and enabling the use of thinner wire gauges when compared to normal passive cables. With the addition of active cables to the DisplayPort standard, cables lengths of more than 100 feet (33 meters) are possible.

To support organizations considering the development of DisplayPort active cables, VESA has provided guidance on the electrical characteristics needed to ensure interoperability with other DisplayPort products within the DisplayPort 1.2 standard. Additionally, the Association has outlined compliance requirements within VESA's PHY Compliance Test Specification version 1.2, enabling DisplayPort active cables to be added to the VESA Certification and Logo programs.

Because active cables are directional and require each end to be connected to appropriate devices, VESA has developed a new DisplayPort active cable logo to assist cable users in identifying the source and sink ends of the cable. This new logo will appear on the active cable, as well as product packaging and promotional material, simplifying their use and identification for consumers and developers of all expertise levels.


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