The text introduces the design scheme and developing way of dual-channel virtual digital oscilloscope based on USB bus.

This hypothesized digital oscilloscope has the simple good work contact surface, can complete the traditional oscilloscope kneading board to be able to complete controls a function.

This paper introduces the studying of a new kind of oscillograph-virtual digital-storage oscillograph of the gyro compass, and talks about its application of upholding the gyro compass.