Abstract
Long-term stability of step-response parameters of the standard voltage divider may be useful in evaluating the long-term stability of the standard measuring system for high voltage impulse, which influences the uncertainty of the system . Because dispersions of the step-response parameters have been large, they have not been considered in evaluating the uncertainty of the system. Dispersion of the experimental response time is largely due to noise superimposed on measured step-response waveforms. It can be reduced either by increasing sampling rates of the waveform or by improving the signal to noise (S/N) ratio. Dispersion of the partial response times is due to oscillations on the wavefront of step-response waveforms. Calculation of the virtual origin becomes unstable in the presence of the oscillation, resulting in the dispersion of the partial response time.
