Oscilloscope - definition
Oscilloscope - definition
Oscilloscope is a specialised measuring device used to visualise electrical waveforms varying over time. It makes it possible to present the signal in the form of a graph on which the horizontal axis represents time and the vertical axis represents the voltage value. Its primary function is to enable analysis of the shape, amplitude, frequency, phase and interference of electrical signals in analogue and digital systems.
The design of the oscilloscope is based on data acquisition, signal processing and a display unit. In traditional Analog Oscilloscopes, the signal was directly amplified and directed to electrostatically deflected beams of electrons in the oscilloscope tube (CRT). Modern Digital Oscilloscopes use high-resolution analogue-to-digital converters (ADCs), which allow sampling the signal at a high frequency and then digitally processing and displaying it on liquid crystal or OLED screens.
Oscilloscopes offer advanced analytical functions, such as triggering (triggering), which enables signal image stabilisation through synchronisation display, and mathematical functions, signal filtering, FFT (Fast Fourier Transform) analysis or decoding of communication protocols. Multi-channel versions allow simultaneous monitoring of multiple waveforms, which is essential when analysing complex electronic circuits.
The technical parameters of the oscilloscope, such as frequency response, sampling frequency, vertical sensitivity and display refresh rate, determine the range and accuracy of possible measurements. High-end oscilloscopes are used in digital system diagnostics, telecommunications, automotive, industrial automation and research laboratories.
In modern engineering, mixed signal oscilloscopes (MSOs - Mixed Signal Oscilloscopes) play a major role, which combine the functions of a classical oscilloscope with a logic state analyser, enabling simultaneous examination of Analog Oscilloscopes and Digital Oscilloscopes. Portable oscilloscopes, often based on single board computers architecture, are used for field service and circuit diagnostics in hard-to-reach locations. The integration of oscilloscopes with Computer Networks and cloud-based data analysis systems enables remote monitoring of signals and automation of testing and measurement data recording processes.
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