| 摘要 |
An appropriate direction and gain value of a smart antenna are efficiently searched for. The MPU 11 of the set top box 1 functionally has the condition setting portion 112 which selects a gain from the second predetermined number of steps of gains and sets it, and selects a direction from the first predetermined number of directions and sets it, the receiving state evaluation portion 113 which generates receiving quality information that indicates the quality of a receiving state of a television broadcast received via the receiving portion 15, the receiving determination portion 114 which determines whether or not a receiving state is good based on the generated receiving quality information, and the search end potion which when the receiving state is determined good, records the set one gain and one direction as the receiving conditions into the condition storage portion 123 and makes the condition setting portion 112 end the setting processings of gains and directions.
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