Patent ID: RE44714

Claim:
A test system for evaluating the response of optical digital disk player components to vibration during playback of an optical digital disk, comprising: a simulator comprising at least one digital output, said simulator configured to provide a simulated digital output signal at said at least one digital output simulating waveform characteristics provided by a pickup mechanism of an optical digital disk player experiencing vibration during playback of an optical digital disk; a digital-to-analog converter coupled to said at least one digital output, said digital-to-analog converter being configured to convert the simulated digital output signal to a simulated analog output signal; and processing circuitry coupled to said digital-to-analog converter, said processing circuitry being configured to receive the simulated analog output signal from said digital-to-analog converter, determine the value of at least one control signal to be issued from said processing circuitry based on the value of the simulated analog output signal, and provide the at least one control signal as an output; wherein said simulator is a computer comprising logic circuitry and memory comprising at least one algorithm, and wherein said at least one algorithm is configured to cause said logic circuitry to provide the simulated digital output signal.