Which instrument is best for measuring high-frequency signals?

The oscilloscope is specifically designed for observing the changing signal voltages over time, making it an ideal instrument for measuring high-frequency signals. It provides a visual representation of waveforms, allowing users to analyze the signal's frequency, amplitude, and other characteristics with precision. The high bandwidth of oscilloscopes enables them to capture fast transitions and detail in high-frequency signal behavior, which is essential for applications in electronics, telecommunications, and signal processing.

In contrast, devices like analog and digital multimeters are primarily designed for measuring DC or low-frequency AC voltages, currents, and resistances. While they may be able to measure frequencies to some extent, their response time and sampling rates are not sufficient to accurately capture high-frequency signals. Similarly, clamp meters, which are generally used for measuring current in conductors without disconnecting them, are not suitable for high-frequency signal analysis as they do not provide the detail needed for waveform representation and may introduce significant inaccuracies at higher frequencies.