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

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

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Conversion of a data word into its corresponding voltage is made by adding <strong>the</strong> voltagevalues represented by <strong>the</strong> binary bits that are set on.Example 1: Amplifier range selected-160 millivolts. Data word from ADC:0 15SData0 0 0 1 1 0 0 0 1 0 1 1 1 0 1OL0I I I I I I I I I I I I1 8 B 5The conversion is made from Figure E-2 as follows:Bit Set Value (millivolts)3 20.00000004 10.00000008 0.625000010 0.156250011 0.078125012 0.039062514 0.0097656Total +30.9082031 millivoltsExample 2: Amplifier range selected—automatic. Data word from ADC:0 1 12 15S Data R RR1 0 1 1 0 0 1 0 1 1 0 1 0 1 1I ID 9 6The range bits (RRR)=011 specify <strong>the</strong> 40 millivolt range. The twos complement of <strong>the</strong> dataword above must be used for <strong>the</strong> conversion, which is made from Figure E-2 as follows:Comp'ementBit Value (millivolts)2 10.00000005 1.25000006 0.62500008 0.156250011 0.019531212 0.0097656Total —12.0605468 millivoltsConverting Voltage from/to Binary Data E-3

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