Research on time-base jitter compensation of broadband sampling oscilloscope in precise measurement of pulse signals

The precise measurement of pulsed signals, especially fast/broadband pulsed signals, has always been a research topic of concern. Broadband sampling oscilloscopes are the most effective electronic instruments for measuring pulsed signals. In the precise measurement of such signals, the time-base jitter of broadband sampling oscilloscopes is a key factor affecting accuracy. This paper employs the orthogonal distance regression algorithm based on a three-channel synchronous measurement system to estimate the time-base jitter of the sampling oscilloscope and realizes its compensation through a linear interpolation algorithm. Meanwhile, the jitter value and Type A uncertainty of the pulsed signal itself are measured to evaluate the compensation effect. The results demonstrate that when the measured signal is a pulse, the three-channel synchronous measurement system and the proposed algorithm can effectively compensate for the time-base jitter of the sampling oscilloscope, providing an efficient solution for precise pulsed signal measurement.