| 摘要 |
PROBLEM TO BE SOLVED: To transmit with one coaxial cable and to construct an inexpensive community receiving system without plural coaxial cables to each television terminal even when each signal is received such as a vertical/horizontal polarized signal of CS broadcasting, a BS, a UHF and a VHF. SOLUTION: Frequency converters 27 and 28 separately undergo frequency conversion of a vertical polarized receiving signal (CSV) that is inputted from a vertical polarized input terminal 18 and a horizontal polarized receiving signal (CSH) that is inputted from a horizontal polarized input terminal 19 into an IF signal that is higher than a frequency band of BS broadcasting, supply them to CSV/H switch devices 31a to 31d which are as many as community receiving television sets through each distributors 29 and 30, and also, the CSV and CSH after the frequency conversion are switched and outputted in accordance with a vertical/horizontal receiving switch control signal that works with a channel selective operation in a CS tuner, further mixed with a BS/U and V mixed signal and transmitted to each corresponding television terminal through respective coaxial cables Ca1 to Ca4 from the mixed output terminals 23a to 23d. |
