Topic summary
Cathode-ray oscilloscope
Extracted from the Wikipedia article Oscilloscope.
Cathode-ray oscilloscope (CRO)
The earliest and simplest type of oscilloscope consisted of a CRT, a vertical amplifier, a timebase, a horizontal amplifier and a power supply. These are now called "analog" scopes to distinguish them from the "digital" scopes that became common in the 1990s and later.