| 摘要 |
<P>PROBLEM TO BE SOLVED: To easily determine causes of degradation of reception intensity of a microwave line. <P>SOLUTION: The reception intensity degradation of a microwave line formed by connecting a transmission station to a reception station by a reflecting plate reflecting radio waves is determined. When the sensor output of a gradient sensor on the side of a reception antenna is above a reference value when a reception level is set below a reference level, it is determined that the direction of the reception antenna is deflected, and information for its repair is transmitted to a check/observation point. When the sensor output is below the reference value, the sensor output of the gradient sensor on the side of a transmission antenna is compared with the reference value. When the sensor output is above the reference value, it is determined that the direction of the transmission antenna is deflected, and information thereof is transmitted to the check/observation point. When the sensor output is below the reference value, it is determined that it is caused by another degradation factor, and information thereof is transmitted to the check/observation point. Since checkup, repair and adjustment work are carried out in the check/observation point based on the narrowed information, a response is rapidly executed. <P>COPYRIGHT: (C)2008,JPO&INPIT |
