Page 268 - CITS - Electronic Mechanic - TT - 2024

ELECTRONICS MECHANIC - CITS

A typical CCTV system consists of seven parts. Each is crucial for the system’s function, but some play a more
critical role than others.
1 Camera:
The camera is the central part of a CCTV security system. You can choose from two types.

Internet protocol: IP cameras use the internet to send and receive footage and are compatible with most devices.
As a result, they’re a convenient option for most organizations.
Analog: Though analog cameras are becoming less common, many legacy systems still use them. However,
they’re likely to be incompatible with more modern tech.
Security cameras come in various configurations.
Bullet: Bullet-shaped cameras often come with bulkier housing to provide extra lens protection. They are more
visible than dome cameras, which can deter some threats.
Dome: Dome cameras look like upside-down half-spheres. They often feature tinted glass, which keeps the lens
orientation hidden.
C-mount: Because C-mount cameras are more rugged, they’re excellent for outdoor applications. They also
feature detachable lenses, so you can change the monitoring distance as needed.
Pan-tilt-zoom: PTZ cameras allow you to point your lens at specific objects in the camera’s field of vision.
The camera system your facility needs primarily depends on what areas you want to monitor. For example,
C-mount and bullet cameras are best for outdoor environments, while dome cameras are often best for indoor
spaces.
2 Monitoring Stations:
At the monitoring station, operators use software-equipped computer monitors to review camera feeds. You may
only need a few monitors, or a whole room. Your monitoring station configuration will depend on your system as
a whole. You can easily add and remove monitors any time your needs change.
Real-time CCTV streaming apps allow you to take your monitoring station on the go. Many modern systems make
apps for mobile devices and laptop computers to provide extra flexibility. Using these apps, you can watch live
video feeds, review historical footage and store video data for future use.
3 Video Recording Systems:
The video recorder processes and store the footage from the IP cameras. The earliest CCTV used VCRs for this
purpose. Since recording technology is obsolete, here are the two types of video recorders in use today.
Digital video recorders: A DVR records digital video to a storage device, such as a disk drive or SD card.
Network video recorders: Most systems using IP cameras opt for the easy integration and compatibility of NVR.
Though NVRs cost more, they’re often worth the higher price tag because you can use them with better cameras.
Meanwhile, recent NVRs have been developed to provide all-in-one solutions that simplify your video surveillance
system for entry-level applications in a plug-and-play format.
Additionally, video surveillance workstations provide reliable delivery points for security recorders. They take some
of the burden off the NVR, enabling better recording and video management. As a result, they’re advantageous
for modern recording systems.
4 Supporting Accessories:
Supporting accessories such as cables and routers are essential for creating a functional system.

Commercial-grade camera cable is essential for connecting your cameras to your recording device. RG59
Siamese coaxial cable is the most common option for commercial CCTV systems due to its EMI shielding and
multiple cabling capabilities.
Ideally, purchasing cable you can cut down to size and attach connectors to ensure your system is the proper size
to deliver high-quality performance for your facility.
If you opt for a wireless system, you’ll also need to purchase a router. Here are some essential considerations for
choosing a router.

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CITS : E & H - Electronics Mechanic - Lesson 146 - 154