| 摘要 |
A system for the generation of a set of voltages, such as the X and Y coordinate voltages of a display or automated milling machine, includes a character generator and a character positioning circuit which, in turn, are responsive to digital control signals as are produced by a computer. A detector compares detection signals to reference signals at successive instants during the use of the system. The computer utilizes a learning routine in conjunction with voltage generation circuitry to develop the reference signals. The computer is programmed to provide specific values of the digital control signals at the times of the comparisons by the detector to detect any deviation of the magnitudes of the voltages of the deflection circuitry from the magnitudes attained during an initial alignment of the system.
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