| 摘要 |
PROBLEM TO BE SOLVED: To extend an incoming frequency band and to easily relay the incoming signal. SOLUTION: An outgoing signal (optical signal) from a center is given to an optical signal input terminal 1, an optoelectronic signal conversion section 6 converts the signal into an electric signal, which is outputted to a subscriber's house from electric signal input output terminals 3, 4 via a branching filter 10 and directional filters 8, 9. An incoming signal to the center is given respectively to the electric signal input output terminals 3, 4, fed to an optoelectronic signal conversion section 7 via the directional filters 8, 9, where the signal is converted into an optical signal and outputted to the center from an optical signal output terminal 2. An incoming video signal and an incoming audio signal that are RF-modulated are given to an incoming relay input terminal 5, converted into optical signals at the optoelectronic signal conversion section 7 and the converted signal is outputted to the center. |
