| 摘要 |
PROBLEM TO BE SOLVED: To accurately select an input signal in a different transmission mode without the need for sufficient isolation. SOLUTION: The device has a transmission mode detection means 115 that receives a desired input signal among a plurality of input signals and detects a transmission mode of the received signal, a comparison means 120 that compares the transmission mode detected by the transmission mode detection means 115 with a transmission mode of a signal to be received, and a channel selection means (110, 120) that select a channel on the basis of the comparison result by the comparison means 120.
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