Exchange circuit for carrier channels - links donor and receiving system by amplifiers with high input and output impedance for through and branch connections

摘要

A transmission system uses exchange equipment for the through connection and branching of carrier frequency channels. The channels are selected from a group at the terminals of a carrier frequency station to be transmitted to the terminals of a second carrier frequency system. The lower frequency in the other channels of the group are demodulated or the carrier frequency levels are branched off in a different direction. The donor and the receiving systems are linked by amplifiers with high impedance input and high output impedance. There are channel converters at the junction points. The insertion losses are low and the matching ratios at the junctions are unaffected.