Complex sentence: The LNB is usually fixed on the satellite dish framework, at the focus of the reflector, and it derives its power from the connected receiver, sent "up" the same cable that carries the received signals "down" to the receiver.
Split into simpler sentences: The LNB is usually fixed on the satellite dish framework, at the focus of the reflector, and it derives its power from the connected receiver. This power is sent "up" the same cable that carries the received signals "down" to the receiver.