| 摘要 |
<P>PROBLEM TO BE SOLVED: To attain a self-diagnosis function utilizing leak radio waves in the transmission radio waves of digital radio equipment itself by matching a frequency in transmission and reception to a signal format, without having to significantly change the hardware and the software. <P>SOLUTION: In the digital radio equipment, test data are generated and modulated for transmission, the leaked test data are received for demodulation, an error in the received test data is determined for measuring a bit-error rate, and the measured bit-error rate is displayed. When the test data are transmitted and received, the frequency in the direct communication between mobile stations and the signal format are utilized for self-diagnosis. <P>COPYRIGHT: (C)2008,JPO&INPIT |
