| 摘要 |
PURPOSE:To achieve an accurate chasing of a satellite ignoring the effect of spin ripples of reception levels by using a sampling mean of reception levels. CONSTITUTION:While spin ripples of reception levels vary by 1Hz, as a reception level input start/end signal generation circuit 7 continue to generate a reception level input start signal at the time t11-t1n, reception levels are inputted into an equalization circuit 8 in succession. Then, the circuit 8 samples the reception levels during the time t11-t1n to memorize the mean V1 thereof into a register 2. At the t1n, upon the completion of inputting of the reception levels, an antenna is driven by the predetermined time tD by a drive signal of a drive signal generation circuit 6. Then, after the stopping of the driving, at the time t21-t2n, the reception level mean V2 is memorized into a register 3. Then, a driving circuit judging circuit 4 compares the pre-driving level V1 and the post- driving level V2 to judge the direction of the subsequent driving. |
