ミキサを用いた同一情報信号による複数チャネルの一括QAM変調

抄録

As far as we know, it is for the first time that the simultaneous QAM conversion of CATV multi-channel signals for the identical broadcast information could be executed by using electrical mixers. The QAM conversion system is assumed to be used for the emergency broadcast and local commercial on CATV multi-channel. The constellation diagrams for 16QAM and 64QAM were successfully obtained by the following experiments.