| 摘要 |
PURPOSE:To reduce a buildup cost of a signal supply system by receiving a video information signal for service and a broadcast signal such as a television receiver to a modulator, mixing both inputs and outputting the amplified signal. CONSTITUTION:A mixer 4 is provided in a modulator 1 and a broadcast signal for a television receiver or the like is inputted to the mixer 4 via an input terminal of the modulator 1 directly. Moreover, a video information signal for service converted into a radio frequency by a converter 3 is inputted to the mixer 4, in which the signal is mixed with the broadcast signal for the television receiver. The video information signal for service and the broadcast signal for the television receiver mixed are inputted to an RF amplifier 5 and amplified, and the result is outputted to a signal supply line for common reception via an output terminal of the modulator 1. Then a signal is fed to a receiver connecting to the signal supply line. |
