Analog vs. Digital Oscilloscope - Learn the differences here

Here I will show you the main differences between the digital and analog oscilloscope

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On Mar 24, 2018
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Analog vs. Digital Oscilloscope - Learn the differences here

Analog oscilloscope and a digital oscilloscope - What is it and what else is there?

Oscilloscopes have been established since the beginning of the 20th century for the measurement and analysis of a wide range of electrical signals - at that time still known as galvanometers. The word oscilloscope is composed of the ancient Greek skopein (to look at) and the Latin oscillare (to rock). High-frequency electrical signals from televisions, radios and computers are made easily visible with these devices and now the digital oscilloscopes have almost completely replaced the analog version of the market. Other types of oscilloscopes include: CCD oscilloscope, mixed-signal oscilloscope, or the more specialized waveform monitor (WFM) in the field of video technology.

Structure and mode of operation

Analog oscilloscopes are based on the physical laws of the cathode ray tube. Source: Wikipedia

Analog oscilloscopes use a classic cathode ray tube, whereas digital devices use LDC technology. For digital oscilloscopes, it may therefore be the case that the display is larger or even colored. For modern digital oscilloscopes such a representation is no longer a problem for the better differentiation of the channels.Since with an oscilloscope, especially the temporal voltage curve is of interest, both analog and digital devices on the one hand show the voltage signal, on the other hand, the electric current, the frequency, phase shifts, continuity characteristics or pulse diagrams. Digital storage oscilloscopes also feature pre-triggering, multi-value analysis software, averaging, mathematical functions, frequency spectra, statistics, and histograms. Furthermore, the digital storage oscilloscope (DSO) can easily enlarge the view. Scrolling is also possible.

Advantages and disadvantages of the analog oscilloscope

Due to the built-in cathode ray tube, the disadvantage of an analog device quickly becomes apparent here: orthogonal errors, edge blur, pincushion errors and non-linearities are considered classic disadvantages. Added to this is the size of the device.

Advantages and disadvantages of the digital oscilloscope

Digital oscilloscopes have a variety of display options, zoom levels and comparison functions
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The digital storage oscilloscope (DSO for short) offers some more benefits. It is much smaller in size, no longer requires an inefficient cathode ray tube, but works with LCD technology in an energy-efficient manner, and the display of measured data is more accurate and better. Last but not least, faster processors convince with these devices. In addition, modern digital oscilloscopes operate with more advanced signal analysis capabilities, making them unquestionably powerful.Analog or digital - For which purposes is which oscilloscope suitable?

DSOs are ideal for high-frequency signals today. With these devices, more extensive functions, signals and frequencies can be effectively recorded, stored and analyzed. An analog oscilloscope saves the image instead of the signal on the tube, which is far from the case with DSOs.

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