This video demonstrates the basic process of calibrating a basic, low bandwidth analog CRT-based oscilloscope. There really isn't a substitute for having the necessary equipment and documentation to perform the job properly. The process begins with checking and adjusting the power supplies, then moves on through the CRT controls, vertical circuits, trigger circuits and horizontal circuits. In most cases, adjustments are made using small trimmers or trimpots, or small adjustable capacitors. Of course, I am not a professional metrologist, so the intent of the video is simply to give you an idea of the basic process of what's involved - as I'm sure that there are certain procedures and considerations that a professional would do that I missed. The oscilloscope used in the video is a Heath 4552 from 1989. This scope was made by Pintek, and is the same as the Pintek PS-251, which can still be purchased new (believe it or not!). Over the years, this same basic scope has been branded by the likes of Elenco, BK Precision, and many others.