| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a hot standby changeover device with high reliability by suppressing a signal loss in a high frequency branch circuit at a receiver side. SOLUTION: A branch circuit 7 is composed of a coupler 1 and a high frequency changeover device 2. The high frequency changeover device 2 is controlled by a control circuit 5, a low loss output (a) of the coupler 1 is connected to an active receiver 3 and a high loss output (b) of the coupler 1 is connected to a standby receiver 4 respectively and when the active receiver 3 is in a fault, the low loss output (a) of the coupler 1 is connected to the standby receiver 4 and the high loss output (b) of the coupler 1 is connected to the active receiver 3 respectively.</p> |
