| 摘要 |
PURPOSE:To quicken the preset operation for selecting a satellite by applying scanning from one end to other end of an antenna turning region and moving the antenna to the turning position applying a minimum AGC voltage stored after the end of the scanning. CONSTITUTION:In depressing a preset button of a keyboard 13, a signal is sent from a signal output section of an antenna positioner 7 to a motor and an antenna reflecting plate 1 starts moving from the east to the west position. A feed horn pickup antenna starts moving from the position of 200 deg. to the position of 100 deg. for the scanning. The AGC voltage being the detection of an intermediate frequency signal is inputted to a microcomputer 19 while being voltage-ampligied and A/D-converted. The microcomputer 19 compares the AGC voltage with the AGC voltage stored in advance and the minimum voltage is rewritten and stored together with a turning angle. Then the feed horn pickup antenna is driven to the position applying a minimum value and then stopped.
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