| 摘要 |
PURPOSE:To design easily a complicated community receiving system, by branching a signal from a trunk line through a directional coupled transformer and leading the signal out through an attenuator of bridge constitution. CONSTITUTION:The signal inputted to a terminal 11 is branched through plural directional coupled transformers 14. To the output terminal of each transformer 14, an attenuator 15 whose attenuation is adjusted freely is connected. The attenuator 15 is a constant K type and the product of resistance values of resistances 16 and 17 is constant. The attenuation of the attenuator 15 is varied to adjust a set level finely, so fine system designing is realized. |
