| 摘要 |
PURPOSE:To detect the failure by converting the monitored information of the multiplex radio unit into frequency, delivering it to the monitor station by using auxiliary line, and monitoring the operating condition. CONSTITUTION:The terminal station (station A) is a monitor station, and the relay station (station B) is a monitored station. The main signal is received via an antenna at the base band, and when the instruction designating the station B is made from the station call out pilot signal generator 5 for monitor, it is fed to the relay station 20 through the auxiliary line at the low band side from the base band. It is fed to the switch control circuit 17 via the receiver 12, causing the switch control signal, which sequentially changes over the monitored information of the switch circuit, converts the voltage value into frequency with the voltage frequency conversion circuit 19, and delivers it to the monitor station 10 through auxiliary line. This is received at the receiver R2, memorized via the frequency voltage conversion circuit 4 and switch circuit 7, and displayed at the display circuit 9. |
