| 摘要 |
PURPOSE:To prevent transmission from being converged to an undesirable area without decreasing the tracking ability, by limiting the area of the 2nd class including all remaining eyes except a remote eye and inhibiting the adjustment of a tap coefficient when a receiving data enters this range. CONSTITUTION:The 2nd-class region 3 is limited so as to include all remaining eyes except the remote eyes 1-1-1-4, and the 3rd areas 4-1-4-4 sectioning the remote eyes 1-1-1-4 is provided at an outer circumference of the 2nd-class region 3. When the value of the receiving data given in the 2nd-class area 3, the adjustment of the tap coefficient is inhibited. Even if the value of the receiving data is parted considerably from the substantial value of the eyes because of mixing of noise, for example, since the area of the 3rd regions 4-1-4-4 is large enough, the tracking performance of the automatic equalizer in the range not causing undesirable convergence is improved. |
