Abstract

This chapter presents different types of electronic oscilloscopes. An oscilloscope is any device that can display waveforms. It is by far, though, the most useful test instrument, allowing the innards of a circuit to be analyzed in real-time; that is, what the oscilloscope displays is actually occurring in the circuit. The real-time or general-purpose oscilloscope is essentially used for displaying a representation of periodically varying measurands. However, more complex oscilloscopes can display non-periodic waveforms, too. The oscilloscope displays two dimensions, the measurands' amplitude against the second dimension of time. There are two main types of storage oscilloscope: one which depends on a special cathode ray tube which maintains its display long after the electron beam has swept across it; and another which samples and stores the waveform digitally, ready for later recall and display. The most important developments under way in oscilloscope technology are those which aim to connect the equipment via a microprocessor-controlled interface bus.

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