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Electronic instruments designed primarily to show graphs of electric signals on a display. Usually the graph shows how signals change with time; typically the vertical (Y) axis represents the amplitude or intensity of the signal and the horizontal (X) axis the variation over time. The brightness of the displayed signal is frequently called the Z axis. These instruments typically consist of an electronic unit (usually digital, less frequently analog) for processing the incoming signal(s); input and output ports; controls (e.g., vertical and horizontal amplitude, trigger, brightness); and an electronic display (screen); it also includes appropriate measuring probes. Oscilloscopes are typically used in maintenance work to calibrate, repair, and/or assess functioning of medical devices and other equipment used in healthcare.
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