DISTRIBUTION SYSTEM FOR SIGNAL TO BE TRANSMITTED BY ULTRASHORT WAVE

PURPOSE: To make the output frequency of a distribution system directly adjustable at a using spot by converting the frequency of signals from a satellite modulated to an intermediate frequency to the sum frequency of a fixed frequency higher than the frequency band of an output channel and a channel frequency after converting the frequency of the signals to the fixed frequency. CONSTITUTION: A first frequency converter 5 converts the frequency of signals transmitted from a satellite through microwaves after the signals are modulated by means of an intermediate-frequency modulator 3 to a fixed frequency F1 which is higher than the frequency band of an output channel. Then, after an intermediate-frequency filter 5 removes the frequencies lower that the frequency F1 , a second frequency converter 8 converts the frequency of the signals by means of a local oscillator 9 commanded from a PLL synthesizer 10. Then signals of the sum frequency of the fixed frequency F1 and a frequency F2 which is equal to a desired channel frequency are fetched through an output filter 11. Therefore, the output frequency of distribution system is adjusted directly at a using spot.