TELECOMMUNICATIONS, DATA COMMUNICATIONS, MICROWAVE COMMUNICATIONS, AERONAUTICAL COMMUNICATIONS, MARITIME COMMUNICATIONS, AND ELECTRONIC COMMUNICATIONS INSTALLATIONS, APPARATUS, INSTRUMENTS AND CIRCUITS, NAMELY, RADIO, TELEVISION, CABLE, SATELLITE, ELECTRICAL OR ELECTRONIC CONTROL TESTING, MONITORING, OPTICAL, ELECTRO-OPTICAL, SIGNALING, AND MEASURING INSTALLATIONS, AND APPARATUS AND INSTRUMENTS ASSOCIATED THEREWITH, NAMELY, VIDEO, AUDIO AND DATA ENCODERS, MULTIPLEXERS, MODULATORS, RECEIVERS, ...