21 MICROWAVE ELECTRONIC EQUIPMENT-NAMELY, ANTENNAS, TRANSMITTERS, RECEIVERS, TRANSMITTER MONITORS, POWER SUPPLIES AND PARTS THEREOF; CATV ELECTRONIC EQUIPMENT-NAMELY, CARRIER GENERATORS, AMPLIFIERS, POWER SUPPLIES, POWER COUPLERS, PADS, EQUALIZERS, DIRECTIONAL COUPLERS, LINE SPLITTERS, TAPS, TERMINATIONS, FILTERS, THERMAL EQUALIZING UNITS, PROBES COAXIAL CABLE, CABLE CONNECTORS AND FITTINGS, MARKER GENERATORS AND PARTS THEREOF; BROADBAND COMMUNICATIONS EQUIPMENT FOR COMMUNICATION BETWEEN CENTRAL STATIONS AND SUBSCRIBER STATIONS-NAMELY, SUBSCRIBER MODEMS, SUBSCRIBER TERMINAL CONSOLES AND PARTS THEREOF