Oscilloscopes allow you to examine the analogue signal integrity: the source of digital signals and their errors. They are therefore indispensable when it comes to tracing digital errors. Oscilloscopes offer limitless possibilities. For instance, they can detect the details of wave forms and display transients. They are used by a wide target audience: from physicists to electrical engineers. For example, an engineer in the automotive industry uses an oscilloscope to check the correlation between the analogue data from sensors and the serial data from the engine management system. A medical researcher uses an oscilloscope to measure brain waves.