METHOD FOR MEASURING AND OPTIMIZING RADIAL TO VERTICAL CROSSTALK

A method and system are provided, for reducing the amount of radial to vertical crosstalk in an error signal in an optical record carrier reader. The method comprises the steps of: measuring error signals in a plurality of error signal control loops of the reader, comprising a focus error signal control loop; calculating power dissipation in each error signal control loop for determining the amount of radial to vertical crosstalk in the focus error signal control loop. Countermeasures may be applied to the error signal control loops to minimize or optimize the radial to vertical crosstalk.