When very large volumes of video images need to be recorded, an optical disk system is used. Optical disks have a much larger video image database capacity than magnetic disks given the same physical space they occupy. These disks can record hundreds of times longer than their magnetic counterparts. Most video security systems require additional accessories and equipment, including: (1) camera housings, (2) camera pan/tilt mechanisms and mounts, (3) GSM Camera Alarm identifiers, (4) VMDs, (5) image splitters/inserters, and (6) image combiners. The two accessories most often used with the basic camera, monitor and transmission link, described previously are camera housings and pan/tilt mounts. Outdoor housings are used to protect the camera and lens from vandalism and the environment. Indoor housings are used primarily to prevent vandalism and for aesthetic reasons. The motorized pan/tilt mechanisms rotate and point the system camera and lens via commands from a remote control console.
Indoor and outdoor camera housings protect Wireless Home Cameras
Indoor and outdoor camera housings protect cameras and lenses from dirt, dust, harmful chemicals, the environment, and vandalism. The most common housings are rectangular metal or plastic products, formed from high impact indoor or outdoor plastic, painted steel, or stainless steel. Other shapes and types include cylindrical (tube), corner-mount, ceiling- mount, and dome housings. Smart Rear View Mirror are often considered an unimportant investment in CCTV, compared to the other parts of a CCTV system. It is, however, very clear that if a monitor is not of equal or better quality than a camera, the overall system quality will be diminished. Simple but worthwhile advice is: pay as much attention to your monitor as you do to your camera selection. Monitors display a video signal from a camera after it has gone through the transmission and switching media. The camera might be of excellent quality and resolution, but if the monitor does not reproduce equally or better than the camera, the whole system loses in quality. In CCTV, as in broadcast TV, the majority of monitor display units are CRTs, which means they use cathode ray tube technology, designed to convert the electrical information contained in the video signal into visual information. Today, there are many alternatives to CRTs, such as liquid crystal display (LCD) monitors, plasma display, and rear projection monitors, but the most popular are still the CRT monitors.
In a small security system, the entire video system and computer equipment can have backup power provided at reasonable cost. In medium-to-large systems, it is often difficult to justify 100% backup power for all video and security equipment. A judgment must be made regarding which equipment will have backup power, as determined by its strategic value in the overall installation and security plan. Any security system has certain essential Wireless Home Monitor , monitor, and recording equipment that must continue operating in the event of a power disturbance or blackout. There are other categories of equipment that, while useful in normal security functions, can afford to be inoperative without jeopardizing the primary assets or safety of the facility. Essential items might include access control and identification equipment at critical points around the facility, internal video surveillance cameras in areas critical to the operation of the facility or protection of valuable assets, and any monitoring and recording equipment for these scenes.
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