The DM63r with two vertical plugins, is an all solid state direct-view storage oscilloscope with a single sweep horizontal system. An 8 x 10 divs, split beam, CRT provides a bright and clear dual beam display. The features of the vertical system depend on the type of plug-in used and are given in the appropriate manuals. The manual covers the mainframe, which houses the following: Calibrator Storage Circuit Sweep Generator and Horizontal Amplifier Power Supplies Un-blanking Amplifier Vertical Amplifier, Output Stage