| 摘要 |
<p>PROBLEM TO BE SOLVED: To easily and accurately measure the communication state of a short- range radio communication apparatus, when performing radio communication, using an ISM band. SOLUTION: The apparatus sets desired frequencies in an ISM band to create a frequency information table, stores frequency information table in a frequency information memory circuit, detects a signal intensity RSSI when a reception circuit receives a receive signal at a set frequency, measures a maximum value RSSImax and movement mean value RSSIme of the signal intensity RSSI in a predetermined measurement time, determines its communication state on the basis of the measured results, stores the measured results together with its frequency in the frequency information table, and externally outputs the frequency and measured results of the stored frequency information table.</p> |
