?Apart from the integrated circuit, most other components are adopted with pin, which reduces the skills requirement from operators, and provides more opportunities to understand the principle of the circuit, internal characteristics, etc. ?Modular design is employed on some function circuits, so as to highlight the main circuit, reduce difficulty of understanding the whole oscilloscope circuit. ?There are detailed illustration material, including clearly marked electric schematic, detailed graphic manufacturing illustration, complete list of materials and clear the fault elimination method, which improves the manufacturing success rate. ?It has better function and performance including improvements on bandwidth, sensitivity, record length, and adds USB interface, ability to be powered by battery. ?Pre-installed software upgrade program (Bootloader) and USB interface allow to upgrade or rewrite program without adding any hardware, which is not only convenient for the user to improve oscilloscope performance, but also makes the instrument a multi-functional SCM experiment board.