An analog oscilloscope is a device used to visualize electrical signals. It displays waveforms on a screen, allowing users to see changes in voltage over time. The main components include a cathode ray tube (CRT), which produces the visual output, and various controls to adjust the time and voltage scales. These oscilloscopes are particularly useful for observing real-time signal behavior in electronics. Unlike digital oscilloscopes, which convert signals into digital data, analog oscilloscopes provide a continuous representation of the waveform. This can be beneficial for certain applications, such as troubleshooting circuits or analyzing audio signals.