Patent ID: 7313057

Claim:
A method for adjusting a control parameter being adopted in an optical disc drive server system, the optical disc drive server system having a compensator, a control loop and a parameter regulator, the control loop comprising an optical sensor, a pre-amplifier, a driving circuit and an optical pickup, wherein the optical sensor receives a reflected light ray from a disc and converts the reflected light ray into an electric signal, the pre-amplifier converts the electric signal into a first tracking error signal/focus error signal, the compensator adjusts the first tracking error signal/focus error signal to obtain a compensated signal, the driving circuit receives the compensated signal, the optical pickup is driven by the driving circuit, and the optical pickup generates a light beam to read/write the disc, the method comprising the steps of: outputting a first sinusoidal signal from the parameter regulator to the control loop, wherein a second sinusoidal signal is obtained after the control loop amplifies the first sinusoidal signal; and enabling the parameter regulator to filter the second sinusoidal signal and calculate a relationship between the first sinusoidal signal and the second sinusoidal signal to obtain the control parameter, wherein the control parameter is outputted to the compensator, and the compensator adjusts the compensated signal according to the control parameter.