| 摘要 |
PURPOSE:To mitigate the stability of a local oscillating frequency, by commonly using the local oscillator for an upper converter and a down converter at the transmission and reception sections of a slave station and a master station. CONSTITUTION:In a slave station (subscriber) transmitter and receiver, a local oscillator 5 is commonly used for a reception and transmission converter, a received carrier wave is reproduced at a carrier wave reproducing circuit 13 and applied to a modulator 14, this is taken as a transmission carrier wave as it is, and a clock reproduced at a transmission carrier wave as it is, and a clock reproduced at a clock reproducing circuit 12 is applied to a demodulator 14 for synchronism. In a master station, a local oscillator 26 is commonly used for mixers 25 and 31. |
