| 摘要 |
<p>An algorithm for controlling a scan tracking head is modified based on a tape timer computation of the position of the tape in a field interval. The scan tracking centering is adjusted forward (i.e., down) if the tape timer indicates the tape position is early in the field, and is adjusted back (i.e., up) if the indicated tape position is late in the field. Thus, the head deflection control decision which determines whether a head jump is made dependent upon tape position as well as on head elevation.</p> |
