| 摘要 |
PURPOSE:To execute satisfactory communication even in an area, where the intensity of radio waves from respective repeating stations is almost equal, by providing a selection control means to selectively execute repeating operation by the plural repeating stations on the repeating station. CONSTITUTION:An opening and closing switch 18 is interposed in a connecting line between a receiver 8 and a transmitter 9 of repeating stations 2 and 3 and an opening and closing switch 19 is interposed in a connecting line between a receiver 10 and a transmitter 11 of repeating stations 2 and 3. Selecting and calling devices 16 and 17 are operated with receiving selecting and calling signals (selection control signals) to be transmitted from a master station radio 20 and a moving station radio 21 respectively and the opening and closing switches 18 and 19, which are normally in a closing condition, are opened and driven. Then, only one desired repeating station is controlled so as to execute transmitting operation. Thus, even when the moving station radio exists in an overlap part 22 of a service area, a communication trouble due to the generation of a beat is canceled since only one repeating station is selected and utilized for repetition. |
