APPARATUS FOR MONITORING TRANSMISSION LINE AND MONITORING SYSTEM THEREOF

摘要

PURPOSE:To enable the exact location of a faulty section even when a lag exists in an information transmission time from monitoring apparatuses, by receiving radio broadcasting and by correcting a time count operation of a time count device on the basis of a time information contained therein. CONSTITUTION:When reaching a time (e.g. 59min of every hour) to receive a time information (of NHK broadcasting) according to a time count operation in its own, a clock function circuit 22 gives a signal to turn a receiving device 20 ON and makes it receive the NHK broadcasting until it receives the time information. The device 20 gives a received information to a time information extracting circuit 21. Extracting the time information, the circuit 21 gives it to the circuit 22. Based on the given time information, the circuit 22 corrects (resets counter outputs indicating a minute and a second) its time count operation and a time information (a time information generated by counting 12 a clock signal from an oscillator 13 and responding to an output of a counter 12). In this way, it is possible to make exact the time information generated by the circuit 22 and to make synchronous the time informations led out by monitoring apparatues LS.