Calibration and Uncertainty Analysis of Sample-Time Error on High Jitter of Samplers

Abstract

In this paper, we propose an estimation method using multiple in-phase and quadrature (IQ) signals of different frequencies to evaluate the sample-time errors in the sampling oscilloscope. The estimator is implemented by ODRPACK, and a novel iteration scheme is applied to achieve fast convergence without any prior information. Monte-Carlo simulation is conducted to confirm the proposed method. It clearly shows that the multiple IQ approach achieves more accurate results compared to the conventional method. Finally, the criteria for the frequency selection and the signal capture time are investigated.

Keywords

• Jitter
• Sampling Oscilloscope
• Time Base Distortion (TBD)
• Uncertainty
• Waveform