| 摘要 |
<p>A switcher applicable to a redundant signal transmission system is capable of maintaining impedance matching when an input line associated with a faulty active transmitter is connected to a standby transmitter. Switching means has first type of switch means (110) assigned to the standby transmitter (50), a plurality of second type of switch means (121,122) associated one-to-one with a plurality of active transmitters (51,52), and a pair of connection lines (161,171,162,172) cascading the first and second types of switch means. When a faulty active transmitter is replaced with the standby transmitter, relay switches (11,12,21,22,23) constituting the first and second types of switch means disconnect a portion (162,172) of the connection lines which is remoter than the second type of switch means (121) associated with the faulty active transmitter (51), as viewed from the first type of switch means (110). <IMAGE></p> |
