Equivalent-Time Sampling Oscilloscopes are specialized test instruments designed for high-frequency signal analysis in industrial and research applications. These oscilloscopes utilize a sampling technique to capture repetitive signals with exceptional precision, enabling accurate measurement of fast waveforms beyond real-time bandwidth limits. Key features include ultra-high bandwidth (up to 100+ GHz), low noise sampling, and timebase stability for characterizing optical communications, microwave components, and high-speed digital systems. Their equivalent-time architecture makes them ideal for non-destructive testing, radar system verification, and semiconductor device evaluation where nanosecond timing resolution is critical.