| 摘要 |
PURPOSE:To connect the interface units of different conditions by enabling two transmitter interface circuits to be switched and connected to a transmitter. CONSTITUTION:Two transmitter interface circuits 23, 24 are provided between the connecting terminal 7a and a transmission amplifier 12 of the transmitter 10, through switch circuits 21, 22. When a dynamic type transmitter, for instance, is used as the transmitter 10, and switching circuits 22 and 21 are turned to ON and OFF respectively, and the transmitter 10 is connected to the interface circuit 24, corresponding to the dynamic type transmitter. As the result, a voice signal, outputted from the transmitter 10, is transmitted to the transmission amplifier 12 through the interface circuit 24. Besides, when a carbon type transmitter is used as the transmitter 10, the voice signal is transmitted to the amplifier 12 through the interface circuit 23.
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