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Contribution Network: Difference between revisions
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== Rediffusion == | == Rediffusion == | ||
After various problems with the | After various problems with the ring system, the decision was made {{unsure|date?}} to contract the Rediffusion company to install a video distribution and contribution system around the campus, still under construction. Located somewhere within most colleges was an AV rack, usually located in a vent room somewhere. This was fed from a collection of contribution points located in seminar or lecture rooms in the college using coax for video and unshielded twisted quad cable for audio. Within the rack, the video could be patched in to a video line driver which was linked via shielded twisted pair to a corresponding receiver over in LTC. The audio was directly patched to the audio contribution cables, as this was already a balanced line. | ||
Wentworth was the last of the original 6 colleges to be built and no system of AV contribution was installed, presumably as a cost saving measure. Langwith and Derwent had been built before the Rediffusion system was commissioned, so although a distribution network was installed, and possibly a link from the old ring system, no Rediffusion contribution system was installed. | Wentworth was the last of the original 6 colleges to be built and no system of AV contribution was installed, presumably as a cost saving measure. Langwith and Derwent had been built before the Rediffusion system was commissioned, so although a distribution network was installed, and possibly a link from the old ring system, no Rediffusion contribution system was installed. | ||
== Current System == | == Current System == | ||
The racks are now gone, but a number of the balanced contribution cables are still used by YSTV to send video back from outside broadcasts. This normally means linking cables passively in LTC, to get from a line driver at the OB site to a line receiver in the station. The local contribution point cables are rarely used, except in Vanbrugh where one of them is now part of the [[Distribution Network]]. | The racks are now gone, but a number of the balanced contribution cables are still used by YSTV to send video back from outside broadcasts. This normally means linking cables passively in LTC, to get from a line driver at the OB site to a line receiver in the station. The local contribution point cables are rarely used, except in Vanbrugh where one of them is now part of the [[Distribution Network]]. | ||