| 摘要 |
PROBLEM TO BE SOLVED: To provide a signal transmitter in which a sound signal coincides with a control signal easily for each channel. SOLUTION: A sound signal and a PTT signal are temporarily frequency-multiplexed at an input section 12 for each channel, and then transmitted through a circuit switching system 11 to an output section 13 as a destination. The frequency multiplexed signal is separated into the sound signal and the PTT signal, and outputted from the output section 13. COPYRIGHT: (C)2008,JPO&INPIT
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