Siemens SMM-Series of gray scale monitors is designed to meet the demanding requirements of Medical Diagnostic Imaging. The monitor features high resolution at high luminance with low background levels for wide dynamic range. The internal microprocessor controls all electrical and magnetic monitor functions, and continuously adjusts drive levels to maintain constant luminance during warm up and over long life of the CRT depending on the environmental light conditions. For each format stored, the dynamic focus ensures optimal sharpness at any point of the screen. All formats are stored internally, including a full set of screen settings for each. Formats are selected and modified through the RS-232 serial port.