Introduction the la-20 series helps minimize users' project risk by providing the most reliable, accurate data capture and a complete view of system behavior. These products are ideally suited for users on hardware software debugging, parametric, mixed signal testing, and complex debugging. Moreover, their compact size and ability to connect with a pc makes them an ideal solution at remote sites. features external (synchronous) and internal (asynchronous) captureoffer a more convenient environment for engineers. provide three sets of searching data functions and six cursor marks. The timing of each trigger point can be shown by the cursor mark. binary code and hexadecimal list mode (state) display. able to save measuring data and waveform results in stand-alone mode. offer i2c, spi, uart and can signal decoding function on pc. provide various signal trigger and capturetotal of four kinds of trigger modes including patternedgeandor. pre-trigger, post-trigger, 3 level trigger, and continued-trigger functions allow users to operate easily. bus analysis and glitch capture functions: 2m bytes4m bytes long memory deptheach ch memory depth is up to 512kbits1mbits. the adjustable sample rate size can be set by users, which avoids long capturing time. provide "trigger counter" and "pulse