Patent ID: 7486602
Filing Date: 2009-02-03
Classification: G11B

Abstract:
1. Device for scanning a track on a record carrier, the track comprising marks representing information, the device comprising drive means for rotating the record carrier at a rotational frequency; a head for scanning the track and generating a read signal, a read unit for retrieving the information from the read signal, a jitter detecting unit for detecting an amount of jitter in the read signal due to signal components corresponding to the marks, tilt control means for compensating a tilt angle between the head and the record carrier, and wobble means for providing a periodic wobble signal to the tilt control means, said wobble means being arranged for adjusting the periodical wobble signal in dependence of the rotational frequency, the jitter detecting unit being arranged for generating a tilt error signal in dependence on the amount of jitter in the read signal and the wobble signal, and the tilt error signal being coupled to the tilt control means for constituting a tilt control loop.