| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a road side apparatus capable of performing a self diagnosis with high precision, and having high reliability. <P>SOLUTION: The self diagnosis of a road side apparatus is performed by finding communication error rates at a plurality of transmission output levels of a carrier wave, and finding the correlation between the communication error rates with respect to the plurality of transmission output levels and specified values with respect to the plurality of transmission output levels. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
