Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Publication of BE527605ApublicationCriticalpatent/BE527605A/xx
H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
H04L5/00—Arrangements affording multiple use of the transmission path
H04L5/02—Channels characterised by the type of signal
H04L5/06—Channels characterised by the type of signal the signals being represented by different frequencies
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04B—TRANSMISSION
H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04J—MULTIPLEX COMMUNICATION
H04J1/00—Frequency-division multiplex systems
H04J1/02—Details
H04J1/06—Arrangements for supplying the carrier waves ; Arrangements for supplying synchronisation signals