CCTV is a surveillance system where signals aren't distributed to the public but are monitored for security purposes. This technology involves the positioning of cameras strategically and observing the input of the cameras on monitors in a discreet location. Since these cameras communicate with the video recorders or monitors across coaxial cables or wireless communication, they are called closed-circuit. Here are the essential components used by professionals in a CCTV installation in your home or office.
Security Camera and Digital Video Recorder (DVR)
There are different security cameras, each designed for various applications and with different mounting options. The CCTV technician will choose the appropriate cameras for your installation requirements. Some of the features that are considered when selecting a security camera include lens type, power type, resolution and the mounting option. Also, your professional will determine the needs of the places where you want to secure when choosing a security camera.
The DVR is where footage from the cameras is recorded and stored. The DVR also has software that enables you to manipulate each security camera. Each camera is wired to the DVR through a unique channel. For example, if your professional wants to use a DVR with four channels, it means the installation will have four cameras. Therefore, your CCTV installer will choose a DVR that supports the number of cameras they shall install in a CCTV security system. DVR's also differ depending on storage and recording speeds.
Coaxial Cable, Connectors and Power Supply
The coaxial cable connects the cameras to the DVR. Siamese wires are the most common cables for CCTV security systems. This is a coaxial cable for transmitting video footage from security cameras to the DVR and another power cable that supplies power from the camera's power supply to the camera. There are also BNC connectors attached to the coaxial cable to provide a plug and play feature between the cable, DVR, and cameras. This means you can make connections to additional cameras with these connectors without having to boot up the system.
To complete the installation, your professional must connect the CCTV security system to a power supply. The power supply powers the cameras. When choosing a power supply, your expert will determine the appropriate power type and voltage strengths based on the amount of power your cameras support. The Siamese cables are connected on one end to the power supply and on the other to the cameras.
For more information, contact a CCTV service.