The present invention is to provide an apparatus and method for calibrating focus balance in an optical disk drive. An item of X-ray-spectrum information about pixels in a grid pattern can be obtained thereby. The system implements a step-lock operation, whereby adjacent interrogators are synchronized to ensure that all downlinks operate within the same time frame and all uplinks operate within the same time frame, to eliminate downlink on uplink interference. The striped semiconductor units are located in the active area. The input devices may be used in lieu of any user interface that may be germane to the platform to enable an enhanced experience with the rendered content. The transmitter transmits the input to a processing device via a wireless communications network.