cctv

A closed-circuit television (CCTV) system uses a stand-mounted or hand-held video camera to project a magnified image onto a video monitor or a television (TV) screen” (from AFB information sheet). A CCTV includes the following basic features: video camera with zoom lens (hand-held or stand); monitor or television (attached camera or external); provide enlarged image of material under camera; magnification range of 2X to 60X+; switchable polarity (black text/white background or white text/black background); controls for focus, magnification, brightness, contrast; X-Y viewing table for easy material movement; variety of monitor sizes (5 inches to 20+ inches); black and white camera with color monitor (allows user selectable foreground and background colors); color camera with color monitor (view full color enlarged images); controls for foreground and background color, split image, color or b/w presentation; line markers or windowing (horizontal and/or vertical screen masking that provides a user selectable viewing window for reading); motorized viewing table