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The oscilloscope has been a primary tool for electronic design engineers since the invention of that instrument, many years ago. The first decades o f oscilloscopes were “analog” in nature. WHITE PAPER
Using a Digital Oscilloscope for Signal
Analysis including a Practical Example of
PLL Characterization
Dr. Michael Lauterbach
Wayne Swirnow
LeCroy Corporation
The oscilloscope has been a primary tool for electronic design engineers
since the invention of that instrument, many years ago. The first decades
of oscilloscopes were “analog” in nature. Their fundamental technology
was the front end amplifier, sweep generator and―most particularly―
the phosphor which was used to coat the screen of a CRT. That phosphor
served as a memory element that briefly held the shape of the signal on
the CRT for the viewer. The value of the scope was in its ability to
trigger many times per second and overlay the phosphorescent images
on the screen. Information concerning the waveshape of
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