Oscilloscopes are instruments which provided a graphical representation of an electrical signal and are used by manufacturing engineers to determine the output and performance of a specific component in a process.

• A graph represents and measures electric voltages as function of time.

Oscilloscopes are important in the laboratories used to observe the wave shape of a signal, measuring amplitude and frequency, examining whether the signal is a direct current (DC) or alternating current (AC), and to observe noise levels of a signal voltage waveform