| 摘要 |
PURPOSE: An automatic satellite antenna which interlocks with a set-top box is provided to track the optimal position of a satellite by suitably driving an azimuth step motor and a wave angle step motor by a one-chip microcomputer and a memory. CONSTITUTION: A one-chip microcomputer(21) in which an EEPROM(Electrically Erasable and Programmable ROM)(21) is embedded sets a predetermined threshold value in a satellite antenna(20). The one-chip microcomputer(21) drives an azimuth step motor(24) and a wave angle step motor(25) through a motor driving IC circuit(23) so that the satellite antenna(20) is automatically located at an optimal azimuth and an optimal wave angle.
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