How oscilloscope scope function?
Answer:
Basically its's pretty simple. It is a cathode ray tube that has both horzontal and vertical deflection plates, similiar to a tube television. When no signal is applied to either plate, you get just a small dot in the middle of the screen. When a signal is applied to the horizontal plate,it causes the electron beam to sweep the dot across the screen. When you apply a signal to the vertical plates, the dot moves up and down. So far so good?
Now apply a sawtooth wave to the horizontal plates of a very precise frequency- the beam will sweep across the screen at a specific rate - if the sawtooth is 1MHz, then the dot will sweep across 1 million time per second, which means each sweep lasts 1 microsecond.
Now provide a voltage you want to see to the vertical plates at the same time that the horizontal plates are getting the sawtooth. As your voltage of interest goes positive, the dot moves up on the screen, and as it goes negative, it sweeps down. You are now watching exactly what your voltage of interest is doing, with the width of the screen equal to 1 microsecond.
Nowadays many scopes have a digital frontend that measures your voltage of interest millions or even billions of times per second, then provides this data to a cpu which renders a screen that duplicates the action of the above-explained crt.
oscilloscopes detect signal patterns and voltage and give you a measurement to go by when testing pieces of equipment. Some signal injecting o-scopes allow you to generate a signal in the receive portion of something such as a radio circuit and analyze how much db loss occurs throughout each module through the oscilliscopes antenna port.
Generally, they function very well. But it seems you need to ask a more specific question. The screen is basically the same as a TV screen, a cathode ray tube.
A scope typically has 2 adjustable parameters, they are the horizontal deflection (time) and the vertical deflection (amplitude). This allows one to create a representation of the wave form by firing a beam across the screen (time constant) & causing it to move up or down (displaying voltage) by applying a voltage to the verticle amplifier part of the CRT (display device). A properally adjusted scope displays a straight line accross the center of the CRT tube when no voltage is detected. Most have a sync adjustment where the horizontal beam can be fired when the input voltage reaches a certain amplitude. To make a long story short, it gives one a representation of the input waveform on the screen.
Sure hope I didn't insult your intelligence with my simplified explaination, but I wasn't sure of exactly what you wanted & thought I'd risk that.
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