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New Broadcast Network: Difference between revisions
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The development effort for an all digital system was prohibitively long, and while the coaxial system had merits in bandwidth terms the cost of the cable ruled it out. The decision was made to select twisted pair cabling on the basis that getting some new cabling installed was the most important step: a digital system could always reuse any cable in the future following an initial analogue installation. | The development effort for an all digital system was prohibitively long, and while the coaxial system had merits in bandwidth terms the cost of the cable ruled it out. The decision was made to select twisted pair cabling on the basis that getting some new cabling installed was the most important step: a digital system could always reuse any cable in the future following an initial analogue installation. | ||
Also, [[Owain Davies]] had | Also, [[Owain Davies]] had constructed a 19" rack unit with 6 balanced line video outputs and matching audio drivers off his own back, so half of the transmission system was already built and tested. | ||
The six transconductance amplifier outputs were allocated as | The six transconductance amplifier outputs were allocated as | ||
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On the whole, the university's use of wooden covered walkways made cable installation fairly simple with a few notable exceptions | On the whole, the university's use of wooden covered walkways made cable installation fairly simple with a few notable exceptions | ||
* The crossroads outside LTC and Central hall, massive bundles of other power cables, fire alarm cables, network and communications cables all met here and the walkway was completely full. A can of WD40 was used to grease the cables so that they could be dragged past this section | * The crossroads outside LTC and Central hall, massive bundles of other power cables, fire alarm cables, network and communications cables all met here and the walkway was completely full. A can of WD40 was used to grease the cables so that they could be dragged past this section | ||
* Central hall, an impenitrable concrete fortress not intended to ever have any wires added to it once | * Central hall, an impenitrable concrete fortress not intended to ever have any wires added to it once constructed | ||
* The under road tubing from Biology to Wentworth, the tubing had blue pull through ropes so laying cables was quite simple, but the area was infested with thousands of itchy biting flies | * The under road tubing from Biology to Wentworth, the tubing had blue pull through ropes so laying cables was quite simple, but the area was infested with thousands of itchy biting flies | ||
* Over Vanbrugh kitchens, through the high voltage substation, with a little supervision from Steve Stead in Estates department | * Over Vanbrugh kitchens, through the high voltage substation, with a little supervision from Steve Stead in Estates department | ||
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== Post fix additions == | == Post fix additions == | ||
=== Estates === | === Estates === | ||
After the initial burst of activity in 1998, the remaining two years of [[Rob Sprowson]] and [[Chris Ward]]'s time was largely occupied chasing estates to add the remaining missing pieces of the jigsaw puzzle. Resourcing within Estates meant that new YSTV monitors | After the initial burst of activity in 1998, the remaining two years of [[Rob Sprowson]] and [[Chris Ward]]'s time was largely occupied chasing estates to add the remaining missing pieces of the jigsaw puzzle. Resourcing within Estates meant that new YSTV monitors were never a top priority. | ||
=== Locations === | === Locations === | ||
Some progress was made, though by graduation the network was still not as extensive as had originally been hoped. A number of small finishing off jobs remained, these were left for the following year's [[Network Engineer]] to complete. | Some progress was made, though by graduation the network was still not as extensive as had originally been hoped. A number of small finishing off jobs remained, these were left for the following year's [[Network Engineer]] to complete. | ||
* Alcuin - cables hastily retracted during nucleus demolition and left in a coil at the back door to the JB Morrell library, this work was conducted remotely after [[Rob Sprowson]]'s graduation while working | * Alcuin - cables hastily retracted during nucleus demolition and left in a coil at the back door to the JB Morrell library, this work was conducted remotely after [[Rob Sprowson]]'s graduation while working | ||
* Library - a power point was located, but had only a live connection and no neutral, internal wiring was added to the snack bar | * Library - a power point was located, but had only a live connection and no neutral, internal wiring was added to the snack bar with [[Chris Ward]] early one morning due to noise restrictions, and a set briefly installed on a bracket. Due to the lean-to contruction of the snackbar the TV inched forward every time the door slammed shut and the TV was hastily withdraw when it fell and nearly injured a student drinking a laté. The socket was scheduled to be repaired in summer 2000 | ||
* Vanbrugh - the snackbar television was modified to always turn on to YSTV rather than an off tuned terrestrial channel, and URY used the 4th output from the receiver, but otherwise Vanbrugh remained unchanged | * Vanbrugh - the snackbar television was modified to always turn on to YSTV rather than an off tuned terrestrial channel, and URY used the 4th output from the receiver, but otherwise Vanbrugh remained unchanged | ||
* Langwith - used annually for conference services, eventually the receiver was modified to have a BNC connector on it to allow the mute monitor to be easily added and removed each summer | * Langwith - used annually for conference services, eventually the receiver was modified to have a BNC connector on it to allow the mute monitor to be easily added and removed each summer | ||