| 摘要 |
A multiplex system for further multiplexing signals output by low group multiplexers (11-1N) by means of a high group multiplexer (2). In this system, when at least one of the low group multiplexers is in a fault state, an alternating pattern signal is supplied to the high group multiplexer instead of the signal output by the faulty low group multiplexer, whereby the ratio of "0" and "1" of the signal output by the high group multiplexer becomes almost 1:1. |
