IBM System/7 Functional Characteristics - All about the IBM 1130 ...

Appendix E. Converting Voltage from/to Binary DataCONVERTING ANALOG INPUT BINARY DATA TO VOLTAGEThe input voltage converted by the analog-to-digital converter is represented in a 16-bitdata word by either 12 or 14 binary bits plus a sign bit, as shown in Figure E-1, dependingon the amplifier range selected and the read command used. The voltage value that eachbinary bit represents for a particular range is called the resolution for that range. Theresolution for each analog input range is shown in Figure E-2.01 13 15S Data R R R1 1 1 1 1 I 1 1 1 I 1 1 1•■•■•■•,,,■••••••■•111.4„...11■••••••••••,.,•■••■••••••••,■••0 1 15S Data OL1 1 1 1 1 1 1 1 1 1 1 1 1•■•••■••„...11•■,■111..,,,■•■•■1111.,,,..111•/•■•■••••,.....■■x x x xFigure E-1. Analog input data wordsConverting Voltage from/to Binary Data E-1