| 摘要 |
PURPOSE:To allow the device to cope with even high speed fading quickly and with even frequent occurrence thereof with respect to the line fault detection circuit detecting a line fault due to fading or the like in a radio communication line and the line changeover device detecting the line fault to switch the line through the use of its detection signal. CONSTITUTION:A 1st fault detection means 10 outputs a 1st fault detection signal with a prescribed width by using a detection pulse as a trigger and an OR means 14 ORs the 1st fault signal and a 2nd fault detection signal outputted from a 2nd fault detection means 12 detecting a fault according to a conventional system and outputs a line fault detection signal. The line is selected by means of the nonhoming homing switching based on the line fault signals from both the lines 20,22. |
