The RS232 bus is a serial communication method commonly user for data transmission between PC's or be PC and a terminal. The test and analysis of this king of signal is widely applied.
Learn more about Oscilloscopes: https://beyondmeasure.rigoltech.com/acton/fs/blocks/showLandingPage/a/1579/p/p-0032/t/page/fm/0
DS4000 series product page: https://www.rigolna.com/products/digital-oscilloscopes/4000/
