Design and implementation of 250MSPS wireless smart virtual oscilloscope

In this paper, a novel high-efficient and full-function virtual oscilloscope is proposed and developed. The method exploits fully the advantages of smart terminal and wireless communication to extend the application of traditional digital oscilloscope. An Android based smart terminal device is used as the center of data processing in the oscilloscope. Meanwhile, Wi-Fi based wireless network is applied to achieve high-speed data transmission and fast system controlling between signal acquisition front-end and smart terminal. Combined with the advantage of multithread technique in smart terminal system, a solution of fluency data processing and system controlling is designed. In addition, in order to match different screen resolutions, an adaptive pixel matching method is proposed for optimal waveform and interface display effect. Finally, we achieved a dual-channel 200MSPS smart virtual oscilloscope featuring a full-function, small-size, low-power and good user's experience. It also makes the traditional oscilloscope more intelligent and expands the application field of traditional digital oscilloscope.