how is it useful and what are its basic functions?
In: Engineering
An oscilloscope is a device that draws a graph of the electrical signals. It is similar to a traditional voltmeter and can be used as one. But in addition to just giving you the value it draws a nice graph so you can see how the value change over time. This is very important when you have an electric signal which changes rapidly. You can see how the signal changes, how long it takes to change, if there are overshoots or ringing when it switches. There are lots of these electrical issues you can see with an oscilloscope. Most oscilloscopes also have two or more channels and can map one channel to the x-axis and one to the y-axis. So instead of showing how the signal changes over time you can see how two signals are related.
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