| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To obtain a DBF (Digital Beam Forming) antenna system which automatically performs abnormality detection and abnormal device identification without manually measuring an input-output path for an important signal by removing the connection between devices. <P>SOLUTION: Paths for feeding back a signal from each component device of a transmitting side to each component device of a corresponding receiving side are provided, and paths for propagating the signal are automatically switched. An abnormal state of each component device is automatically detected while installed by confirming a reception signal when a transmission signal processing part transmits a known signal. <P>COPYRIGHT: (C)2004,JPO</p> |
