A method to improve cathode ray oscilloscope accuracy

Distortion in cathode ray oscilloscopes limits the achieved accuracy in spite of piecewise linear correction. Polynomial functions for static and timebase nonlinearity corrections can achieve 4 to 5 times improvement inaccuracy compared to only about 2 times improvement for linear correction. For fast transient waveform recording this improvement is important in increasing dynamic range and decreasing waveform noise.<
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