| 摘要 |
PROBLEM TO BE SOLVED: To obtain radio equipment by which a reception S/N becomes the same one regardless of the selection of simplex or duplex communication and also strong reception voice is obtained in radio equipment for changing-over transmission and reception and executing them by means of time division through the use of a single radio frequency. SOLUTION: The radio equipment is provided with a narrow band filter 4-a dedicated for duplex communication and a wide band filter 4-b for simplex communication as a band filter for a receiving part intermediate frequency. Then, the change-over of the both is automatically controlled by linkage with the change-over of simplex duplex communication so that S/N noise power deteriorated at the time of duplex communication is reduced and the reception S/N being the same as that at the time of simplex communication is obtained. Thus, a noise component as a power quantity is reduced so that strong reception voice is obtained.
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