发明名称 TWO-WAY CATV SYSTEM
摘要 PROBLEM TO BE SOLVED: To provide the 2-way CATV system capable of 2-way communication for a multiple dwelling house without being affected by noise. SOLUTION: A request signal outputted from a terminal television receiver of each home is outputted at frequencies of 900-1000MHz higher than an upper limit frequency of an outgoing signal sent from a center equipment 1 and it is converted into a frequency of 10-50MHz at a frequency conversion section 12 and outputted when it is outputted from a distributer 7 of a multiple dwelling house, then the effect of noise from house electric appliances is reduced and the signal is transmitted to the center equipment 1 via a conventional transmission line.
申请公布号 JPH10174084(A) 申请公布日期 1998.06.26
申请号 JP19960330780 申请日期 1996.12.11
申请人 SUMITOMO ELECTRIC IND LTD 发明人 TSUJI SHINJI;HAMAZAKI YUJI
分类号 H04B3/38;H04B15/00;H04N21/61;H04N21/647 主分类号 H04B3/38
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