| 摘要 |
PURPOSE:To prevent occurrence of momentary interruption and line changeover due to mis-operation of a changeover device when the maintenance personnel operates a line. CONSTITUTION:The communication equipment is provided with a 1st changeover device 307 stopping an alarm signal outputted from an AGC control circuit 306 applying an AGC voltage to a variable gain amplifier 302 of the microwave communication equipment and outputting a prescribed signal simultaneously, a 2nd changeover device 308 outputting a control signal manually operating the AGC independently of the 1st changeover device 307, a priority circuit 309 receiving a prescribed signal and a control signal respectively from the 1st and 2nd changeover devices 307, 308 and ANDing both the signals and a 3rd changeover device 310 selecting the mode of the AGC to be the manual mode from the automatic mode with the output of the priority circuit 309. |
