A method for providing incentive to players of networked slot machines includes a card reader associated with each machine and a card associated with each player. A template is configured to generate a display at a first user computer which includes a plurality of sections in a single screen display, including at least a preview section configured for previewing a plurality of video feeds, and a media player section configured for displaying a video signal including at least some of the video feeds. A reference light and a measurement light are derived from the common source light and propagated across separate paths of optically matching optical components in order to produce a common signal variation on both the reference light signal and the measurement light signal. This is a fixed port number for any given remote data device and is used for addressing the remote data device by the central data acquisition system that wants to access the remote data device.