Digital quadrature amplitude modulator
Digital radio communication system
Digital radio communication system and primary and secondary sta
Digital radio mobile frequency supervision
Digital radio receiver which detects when a portion of a burst i
Digital radio telephone system
Digital radio telephone system
Digital radio transmission system
Digital radio transmission system for transmitting a plurality o
Digital radio transmission system with a connection-accompanying
Digital radio transmission system with variable duration of the
Digital radiotelephone system
Digital receiver/transceiver synchronization pulse detector for
Digital remote switching unit
Digital repeater with 3-way branching of service channels
Digital ring control system for digital multiplexer
Digital satellite exchange
Digital satellite telephone office
Digital service unit for connecting data processing equipment to
Digital service unit with secondary channel diagnostics