Due to the high sampling rate of real-time oscilloscope, ADC bits are difficult to improve. In the case of high resolution measurement, it is often realized by the data acquisition card with low sampling rate. In order to meet the high resolution testing requirements, the American company has developed a new real-time oscilloscope WaveRunner HRO 6Zi, or HRO(high resolution oscilloscope). The ADC has 12 bits and a high sampling rate of -2GS /s. The storage depth (record length) can reach 256M sampling points per channel. The high resolution, high sampling rate and long storage characteristics of HRO oscilloscope make it can replace the data acquisition card in most test situations. Of course, it also has the measurement, analysis and debugging functions that oscilloscope is good at, and its ease of use is better.