| 摘要 |
PURPOSE:To utilize the effective use of frequency by providing a storage section storing a slave set disabling to attain excellent signal transmission with a master set to a repeater and using the repeater so as to relay only the signal by the slave set stored in the storage section thereby preventing the overlapped signal sent to the master set. CONSTITUTION:When a signal sent from a slave set B is received by a repeater C, the transmission signal of the slave set B is detected to detect the code of the slave set B. The code is compared with a code stored in a storage section 3, then a control section 4 discriminates whether the reception signal is the transmission signal of the slave set B designated for the relay or not. When the reception signal is the signal from the designated slave set B, the reception signal is amplified and sent from the transmission section 2 and when the reception signal is not the transmission signal from the designated slave set B, no transmission is given from the transmission section 2. In using the storage section 3, if it is required to change the slave set B of the relay due to any cause, it is coped with easily by replacing the storage section 3.
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