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How Does a CCTV System Work?

Safe practices is a need. CCTV Systems are a solution.

As stated by Maslow's hierarchy of needs, safety is the following highest need for human beings, after water, food and air. Each time our physiological needs are satisfied, we frantically seek safety.

The importance of security is clear in our modern societies. I'm in no doubt that you have noticed, on more than a number of occasions, signs advertising Surveillance cameras in operation. The number of times have you seen surveillance camera systems on buildings, businesses, main highways, on private and public places? Almost everywhere you look, there are actually CCTV.

A CCTV System (Closed Circuit Television) makes it possible for us to capture images and relay them privately to a certain place to be monitored. This is an essential part of the solution in satisfying our protection needs.

But how does a CCTV system work?

A very plain Analogue CCTV installation can sometimes include six components:


Video cameras. They are the place to begin for any CCTV system, recording and creating the footage, an analogue coverage, that will be transferred to the handle position. Before choosing a Surveillance camera, we should take into consideration aspects including outdoor or household, the field of view, image quality as well as the night vision distance. You will discover a wide range of Surveillance cameras in our catalogue: bullet cameras, dome cameras, PTZ cameras, which enable you to pan, tilt and zoom.


The digital video recorder (DVR). This component can get the video footage, convert the analogue signal to digital, put together and store it on a disk hard drive, a USB flash drive, and even a networked storage. We can discover DVRs with up to 32 channels video contribution which allow us to connect 32 CCTV surveillance cameras and create complex safety circuits.

The Cameras-DVRs coax cables. Based upon the security cameras and DVRs, we make use of various kinds of cable, as an example Cat 5 or Cat 6.

The TV or monitor. Making use of a CCTV System, we can check out what our cameras are capturing right away or what our DVRs record.

The DVR-Monitor connectors. May include BNC/Scart connectors and HDMI connectors.

The power source. The cameras can be powered by connecting the power source directly to the camera or through the use of a RG59 Siamese which allows the running of both the video and power to safety cameras using a one cable.

Over recent years, the modern wireless camera systems and IP CCTV alternatives have improved on this basic process, offering greater adaptability, easier installation and more beneficial system integration. We will discover more in following posts on precisely how CCTV systems work.