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Communication Systems

Jul 22, 2013

Leaky Feeder Cables

Leaky feeder cable is a radio frequency cable with weak shielding which allows radio signals to enter or leave the cable at any point
 A single cable carries several channels in opposite directions with a guard band between them to prevent collisions
 The cable has 16 intermod-free channels with super-low intermodulation noise levels
 Also, the cable is able to transmit wide-spread data and video signals making it ideal for voice over IP handset, WLAN, IP camera, remote blasting and PC connections

 

VHF System

 30 meter radio coverage off of the leaky feeder cable
 500 meter amplifier spacing
 Power supplies can be space up to 8,000 meters apart
 Local and remote diagnostics capabilities which can direct technical personnel to the problem area

 

UHF Systems

 120 meter radio coverage off of the leaky feeder cable
 Minimizes the impairment of radio wave transmission in curves, branches, and other spatial limitations inside of a mine
 350 meter amplifier spacing
 ATEX certified for use in mines at the risk of firedamp

 

Instrincally Safe System

 Allows for system use in mines or other hazardous areas where explosions are possible as a result of the surrounding environment
 Battery back-up allows for up to 4 hours of emergency power

 

Tagging And Tracking

 Locate personnel in an emergency situation
 Improve traffic flow and warn of approaching vehicles
 Monitor restricted areas and time spent underground
 Manage operations more effeciently


Source: http://www.beckerwms.com/runtime/cms.run/doc/English/1235/Types_of_Systems.html