In order to improve the static precision for Digital Oscilloscope(DSO) and realize the automatic measurement, the chaotic measurement model based on the two dimension Henon map is adopted to measure the signal’s amplitude. By selecting model’s parameters and initial value, adjusting the chaos threshold, the high precision calibration of the signal’s amplitude is realized. Meanwhile, the measurement model with variable parameters is constructed. This way does not need judge the system’s state whether change from chaotic state to steady state, and reduce the burden of DSO greatly. This algorithm changes the traditional calibration way, which embedded in the function library of DSO as part of the calibration algorithm, and improve the calibration performance. Compared with the traditional calibration way, the experiments show that this method has good measurement result.
