| 摘要 |
PROBLEM TO BE SOLVED: To provide data communication equipment capable of minimizing the influence of radio waves generated by external equipment and improving communication efficiency even under the environment that radio communication equipment and equipment generating strong noise exist on the periphery in the data communication equipment for performing communication between terminals within a system. SOLUTION: A radio wave intensity detection circuit 116 outputs signals based on the intensity of reception radio waves. A level storage/setting circuit 140 outputs an upper limit value and a lower limit value for distinguishing the radio waves generated by communicating partner equipment and noise generated by a radio wave transmission source different from that to a comparator circuit 141. The comparator circuit 141 compares the amplitude value of reception signals indicated by signals inputted from an AD circuit 139 with the upper limit value and the lower limit value inputted from the level storage/setting circuit 140 and outputs signals indicating a compared result. On the basis of the compared result, the communication with the communicating partner equipment is controlled. COPYRIGHT: (C)2006,JPO&NCIPI
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