antennas, antenna boosters, audio video signal transmitters, audio video signal receivers, audio video signal tuners, electric cables, electrical connectors and couplers, audio video signal mixers, television signal modulators, signal band separators, signal band filters, audio video signal amplifiers, electrical connectors, namely cable heads and antenna ends, modems, splitters, signal taps, electric plugs, all for broadcasting systems, satellite broadcasting systems and satellite communicat...