The Agilent HP 59303A is a reconditioned Digital To Analog Converter that accepts a string of serial ASCII characters and converts any three consecutive input digits to an analog output voltage, accurate to 0.1% in 30 µS. Fully programmable via the HP-IB or manually operated from the front-panel. There are three output modes (Normal, Offset and Plus/Minus) that make the converter convenient for use directly with data loggers, chart recorders, X-Y plotters and displays avoiding the need for auxiliary equipment to shift zero level or change polarity.