A 100 MHz oscilloscope is a type of electronic test and measurement instrument used to visualize and analyse electrical signals. The term "100 MHz" refers to the oscilloscope's bandwidth, which is a measure of the range of frequencies the instrument can accurately capture and display.

The oscilloscope's bandwidth of 100 MHz indicates that it can effectively capture signals with frequencies up to 100 million cycles per second (Hertz). This makes it suitable for analysing a wide range of signals, including moderate-frequency analogue and digital signals.

A 100 MHz oscilloscope is a versatile tool that provides accurate signal analysis capabilities for a wide range of electronic applications. Its bandwidth allows for the visualization and measurement of signals with frequencies up to 100 MHz, making it suitable for various testing, analysis, and research tasks in the field of electronics.