A process control and manufacturing information database client application is disclosed displaying received time-series data in an unambiguous manner when a displayed range of time-series data includes a DST transition for a designated time zone for displaying the data. The method includes determining modified output levels using a combined error signal formed from intermediate error signals for each color channel together with an error signal offset value, and adjusting the input levels for the nearby pixels responsive to weighted error signals. A decision feedback equalizer generates a computation read signal by performing a predetermined computation on the read signal in accordance with a clock signal.