High Quality Content by WIKIPEDIA articles! The IBM 1711 Data Converter was part of the IBM 1710 process control computer. The 1711 contained an analog-to-digital converter that accepted signals from the IBM 1712 Multiplexer and Terminal Unit that were between -50 millivolts and +50 millivolts and converted them into signed, four decimal digit numbers that were stored in the 1710s core memory.