| 摘要 |
PROBLEM TO BE SOLVED: To automatically measure the reception strength of a frequency, at which disaster information is broadcast, for each region, and to make the operator select the frequency of reception strength of certain value or more, or to set the frequency of maximum reception strength as a broadcast reception frequency.SOLUTION: A reception strength measurement activation unit 5 activates a reception strength measurement unit 6 when a predetermined time elapses after a currently set broadcast reception frequency is set. A reception strength presentation unit 3 presents information about the reception strength of a plurality of broadcast radio waves measured by the reception strength measurement unit 6, when the reception strength of currently set broadcast reception frequency is less than a predetermined reception strength, a reception frequency setting unit 7 sets the selected frequency as the broadcast reception frequency, when frequency selection operation is performed in a predetermined time, and automatically sets the frequency of broadcast radio waves having the strongest reception strength, out of the plurality of broadcast radio waves measured by the reception strength measurement unit 6, as the broadcast reception frequency, when frequency selection operation is not performed.SELECTED DRAWING: Figure 1 |
