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rb:coventrycable [13/07/2019 10:57]
andrew [ProCATV]
rb:coventrycable [04/10/2019 10:46] (current)
andrew [Distribution]
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 Each DLA fed several trunks which were split as it radiated out with passive directional couplers. As required when the cable loss exceeded the allowed limits, a Line Extender amplifier was used, this typically had one input, one loop through (at -3.4db) which fed a tap either on a telegraph pole, building or an underground in a footway box, and two amplified outputs. ​ Each DLA fed several trunks which were split as it radiated out with passive directional couplers. As required when the cable loss exceeded the allowed limits, a Line Extender amplifier was used, this typically had one input, one loop through (at -3.4db) which fed a tap either on a telegraph pole, building or an underground in a footway box, and two amplified outputs. ​
  
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 +{{:​rb:​dla-cabinet-2.jpg?​200|Green painted cabinet with a differnet design of ferroresonant transformer}} {{:​rb:​dla-cabinet-2-topconnections.jpg?​200|Coax entries on the top}}  {{:​rb:​dla-cabinet-2-cables.jpg?​200|Looking into the duct entries}}
 ===== Reverse path and Status Monitoring ===== ===== Reverse path and Status Monitoring =====
  
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 {{rb:​texscan3.jpg?​200|}} {{rb:​texscan3.jpg?​200|}}
 {{rb:​texscan4.jpg?​200|}} ​ {{rb:​texscan4.jpg?​200|}} ​
-{{rb:​procatv4.jpg?​200|}} +
-{{ rb:​procatv5.jpg?​200|}} ​+
 It looks like the address for the unit is set via the blue jumper strip, this all preceeds TCP/IP etc, so I have no idea what the address structure or protocols would be like. I don't even know if this was one way, or if the central controller could talk to each monitor individually to interrogate it. It looks like the address for the unit is set via the blue jumper strip, this all preceeds TCP/IP etc, so I have no idea what the address structure or protocols would be like. I don't even know if this was one way, or if the central controller could talk to each monitor individually to interrogate it.
  
 +{{rb:​procatv4.jpg?​200|}}
 +{{rb:​procatv5.jpg?​200|}} ​
 ==== ProCATV ==== ==== ProCATV ====
  

rb/coventrycable.1563011837.txt.gz · Last modified: 13/07/2019 10:57 by andrew