A waveform analyzer is a device used to measure and display the characteristics of electrical signals. It helps engineers and technicians visualize waveforms, which represent how voltage or current changes over time. By analyzing these waveforms, users can identify issues in electronic circuits, ensuring proper functionality and performance. These analyzers can capture various signal parameters, such as frequency, amplitude, and distortion. They are commonly used in fields like telecommunications, audio engineering, and electronics testing. Popular types of waveform analyzers include oscilloscopes and spectrum analyzers, each serving specific measurement needs in signal analysis.