Want to know what's going on in your house when you're not there? Need an extra set of eyes in your store or office? If the answer is yes, you may want to install a CCTV system. CCTV (Closed Circuit Television) refers to a system of surveillance cameras that send signals to a specific location-a monitor, or your PC. CCTV systems are commonly used to monitor banks, shopping malls, and government facilities-and these days, as CCTV technology becomes more affordable and easier to use, more and more people are installing CCTV cameras in their homes and businesses.
How Does CCTV Work?
There are many different types of CCTV systems available-analog and digital, wired and wireless-and their modes of operation vary; however, the basic components are more or less the same: a camera, a lens, a monitor, and (for wired systems) cables that carry the signal from one place to another. Many systems also use video recorders to record the video footage.
The camera picks up the signal from the area being monitored via the lens (which determines how far and how much the camera can see, and which is often bought separately) and can be either wired or wireless. In a wired system, the camera sends the signals through a coaxial cable to the monitor; in wireless systems, no cable is needed, and the camera simply broadcasts the signal straight to the monitor itself.
The monitor can be either a simple television set (without tuning capacity) or your PC or laptop. Most wired analog systems use television monitors, while digital and wireless systems tend to use computers as monitors (so you can view the images from anywhere, often via the internet).
For recording purposes, the monitor is accompanied by a video recorder-a VCR for analog systems, or a DVR (digital video recorder) for digital systems. A DVR can actually replace the monitor as the receiving device, since many DVRs are stand-alone units that do everything a computer would do: receive, record, and store the information for later viewing.
Once you've installed your CCTV system, you can feel secure in the knowledge that whatever happens in your home or business, you'll be able to see it.
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