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Goodricke-Physics-Hub: Difference between revisions
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add some photographs, note on cable hole
Dummy User (talk | contribs) (complete description, add colour code labels) |
Dummy User (talk | contribs) (add some photographs, note on cable hole) |
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=== Structure === | === Structure === | ||
The cable route consists of a series of extensions added on at each major upheaval in YSTV's history to allow us to keep broadcasting via the existing infrastructure. It is therefore less than planned. | The cable route consists of a series of extensions added on at each major upheaval in YSTV's history to allow us to keep broadcasting via the existing infrastructure. It is therefore less than planned. | ||
[[Image:Goodricke-Physics Cables.jpg|thumb|right| Out of the window]] | |||
Behind the monitor rack in the [[G/046|control room]] is a piece of tag strip screwed to the cable duct, which has three XLR connectors coming off it. These are marked up as Network Audio, Derwent Send and Derwent Return. The last two are basically contribution circuits and re-patched as needed, whilst Network Audio should be fed with the balanced network audio signal. Video is carried on a standard BNC connector plugged in to patch box 6. | Behind the monitor rack in the [[G/046|control room]] is a piece of tag strip screwed to the cable duct, which has three XLR connectors coming off it. These are marked up as Network Audio, Derwent Send and Derwent Return. The last two are basically contribution circuits and re-patched as needed, whilst Network Audio should be fed with the balanced network audio signal. Video is carried on a standard BNC connector plugged in to patch box 6. | ||
[[Image:Goodricke-Physics Cables2.jpg|thumb|left| Over the top]] | |||
From the tag strip a 3-pair sheilded cable of the type used for the 1998 network and the 150m unbalanced video cable (originally made for [[Breaker 88]]) go through the window frame by the monitor rack, along the top of the G/045 windows and up over the room of the college nucleus. From here it wends it's way down along the covered walkway past the (old) Dining Hall and the bar to the "bus stop", then turns left past the cash machine towards the Physics and Electronics building. Just before the doors into this it goes through | From the tag strip a 3-pair sheilded cable of the type used for the 1998 network and the 150m unbalanced video cable (originally made for [[Breaker 88]]) go through the window frame by the monitor rack, along the top of the G/045 windows and up over the room of the college nucleus. From here it wends it's way down along the covered walkway past the (old) Dining Hall and the bar to the "bus stop", then turns left past the cash machine towards the Physics and Electronics building. Just before the doors into this it goes through holes in the wall of the building to reach the attic room above [[P/X/002]]. There are in fact two separate holes. One above the walkway takes the audio cable and the coax return feed cables, and the other about 2 feet from the floor takes the network video cable, which has wondered off the side of the walkway with a cable tie round the walkway leg to keep it there. This cable then goes up the wall of P/X/002 and then across the ceiling to reach the attic. | ||
[[Image:PX002 hole in wall.jpg|thumb|right|The hole in the wall]] | |||
Above P/X/002 there is a wall box with a white plate on it carrying two BNC connectors and four 1/4" jack sockets (someone in York - please take a photo and add it here). These are the ends of the old Rediffusion local contribution cables to [[P/S/016]]. Originally these would have taken individual camera feeds back to the studio and AV rack in P/S/016, but now they act as a pair of audio and video tie lines. The unbalanced video from Goodricke is plugged into the video lead (possibly via a video DA if we want to send video down to [[Physics Concourse|the concourse]] as well). The audio cable splits to three balanced jack connectors (with a common screen), one of which has the network audio on it. How these are plugged in will obviously change the function of the circuits from here onwards, however both sides are labelled, and this shouldn't need changing. | Above P/X/002 in the attic there is a wall box with a white plate on it carrying two BNC connectors and four 1/4" jack sockets (someone in York - please take a photo and add it here). These are the ends of the old Rediffusion local contribution cables to [[P/S/016]]. Originally these would have taken individual camera feeds back to the studio and AV rack in P/S/016, but now they act as a pair of audio and video tie lines. The unbalanced video from Goodricke is plugged into the video lead (possibly via a video DA if we want to send video down to [[Physics Concourse|the concourse]] as well). The audio cable splits to three balanced jack connectors (with a common screen), one of which has the network audio on it. How these are plugged in will obviously change the function of the circuits from here onwards, however both sides are labelled, and this shouldn't need changing. | ||
The video cable on this section, like most of the other local contribution cables, is a Belden braided foil screened type rather than standard RG59. This gives good shielding and so picture quality, but is very difficult to put a standard crimp connector onto successfully! The braid ends are also sharp, which can make the process painful. The audio cables are unshielded, with two grey and two blue cores in each black outer sheath. The 4 jack connectors wire up all 4 pairs (treating the two blue as a pair and so on) in two cables, without regard to phasing. If anyone ever tries stereo, beware! There is no screen connection to the jacks as the cables are unshielded. | The video cable on this section, like most of the other local contribution cables, is a Belden braided foil screened type rather than standard RG59. This gives good shielding and so picture quality, but is very difficult to put a standard crimp connector onto successfully! The braid ends are also sharp, which can make the process painful. The audio cables are unshielded, with two grey and two blue cores in each black outer sheath. The 4 jack connectors wire up all 4 pairs (treating the two blue as a pair and so on) in two cables, without regard to phasing. If anyone ever tries stereo, beware! There is no screen connection to the jacks as the cables are unshielded. | ||
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|+ Colour Code in P/X/002 to P/S/016 to Hub cables | |+ Colour Code in P/X/002 to P/S/016 to Hub cables | ||
|} | |} | ||