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The curved dish focuses incoming radio waves onto feed horn. The feed horn then passes signal onto receiving equipment. Ideally, there will be no obstructions, such as trees to interfere with signal from satellite to satellite dish. With no obstructions you receive a much clearer signal.
Some systems are set up to receive signals from more than one satellite. A new dish design uses two or more horns to pick up different satellite signals. As beams from different satellites hit curved dish, they reflect at different angles so that one beam hits one of horns and another beam hits a different horn.
The central element in feed horn is LNB (low noise blockdown converter) The LNB amplifies radio signal bouncing off dish and filters out noise (radio signals not carrying programming). The LNB passes amplified, filtered signal to satellite receiver inside viewer's house.
A cable is run from satellite dish into house and then connects to satellite TV receiver (black box) thus completing connection.
Gary Davis is owner of Dish Network Satellite TV, has several years experience in the Satellite TV Industry and has written several articles on satellite TV.