In {TAIL ~ one embodiment}, {HEAD ~ the scan logic} 20 deduces this distance yet to be covered from the comparison of the output of the analog to digital converter 44 with the map of plot A, and outputs a media position error signal 
In
In { TAIL ~ one embodiment } , { HEAD ~ the scan logic } 20 deduces this distance yet to be covered from the comparison of the output of the analog to digital converter 44 with the map of plot A , and outputs a media position error signal
REL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH