Manufacturers of security equipment, using video technology have adapted this technology for their needs. In this case, you can get amazingly clear video data (and audio) from the cameras installed virtually anywhere in the world. True, the obtained images are not provided in real time strict sense, but it almost does not detract from their merits when used for solving the security of protected sites. Such a system of direct data cable connection in this case may flow in both directions, allowing the user to not just passively receive information but also to control the camera by tilting it to one side or another, turning in the right direction, increasing or decreasing the size of images and perform other similar functions. There are also other ways of transmission signals (eg microwave, infakrasnoe radiation, etc.) but they are not yet widely spread Monitors Monitor is device that converts a video signal into an image (assuming the exact same camera that is fixed when shooting). Some systems allow you to transfer images to a normal television receiver or monitor computer, but usually uses special color or monochrome monitors. Typically, a color camera is used in conjunction with color monitor, especially if it is necessary to have a picture in real time, but this solution does not always produce the best results.

For example, monochrome monitors have a resolution of approximately two times higher than the color and, therefore, in some conditions (eg low illumination of the subject) give a much clearer picture. Size. The standard screen size may be 9 '(23 cm), 12' (31 cm) 17 "(43 cm), and 20 '(50 cm) inches. This figure corresponds to the distance between the opposite diagonal corners screen. The user can give the impression that monitors small screens offer a clearer picture, but you should always take into account the distance from which the user looks at the screen in normal conditions.