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Display and general external appearance


CRO Operation

Dual Trace Oscilloscopes

Dual beam oscilloscope

Phase Measurements


Attenuator probes

Active Probes

Current probes

Comparison Between Analog And Digital Storage Oscilloscopes.


An oscilloscope (also known as a scope, CRO, DSO or, an O-scope) is an instrument that allows observation of constantly varying signal voltages, usually as a two-dimensional graph of one or more electrical potential differences using the vertical or 'Y' axis, plotted as a function of time, (horizontal or 'x' axis). Although an oscilloscope displays voltage on its vertical axis, any other quantity that can be converted to a voltage can be displayed as well. In most instances, oscilloscopes show events that repeat with either no change, or change slowly. Oscilloscopes are commonly used to observe the exact wave shape of an electrical
signal. In addition to the amplitude of the signal, an oscilloscope can show distortion, the time between two events (such as pulse width, period, or rise time) and relative timing of two related signals. Oscilloscopes are used in the sciences, medicine, engineering, and telecommunications industry. General-purpose CROs are used for maintenance of electronic equipment and laboratory work. Specialpurpose oscilloscopes may be used for such purposes as analyzing an automotive ignition system, or to display the waveform of the heartbeat as an

Originally all oscilloscopes used cathode ray tubes as their display element and linear amplifiers for signal processing, (commonly called as CROs) however, modern oscilloscopes have LCD or LED screens, fast analog-to-digital converters and digital signal processors. Some oscilloscopes used storage CRTs to display single events for a limited time. scilloscope peripheral modules for general purpose laptop or desktop personal computers use the computer's display, allowing them to be used as test instruments.