The Basics of a CCTV Home Security System

Nowadays, anyone can secure their property with the use of home security cameras. This allows you to monitor and record any and all activity that takes place in your house. Even if you are not at home, you can view the camera’s live feed of what is happening (or not happening) at home via your handphone.

There are a few benefits besides adding some tech to your home security; you can see if it’s the pizza guy approaching your front door or maybe you’re a parent, wanting to keep an eye on your sleeping baby, lest it falls out of its crib.

CCTV Systems

These days, CCTV (Closed Circuit TV) systems have become extremely popular due to the leaps and bounds made by the technology and the corresponding reduction in price. Anywhere you go, be it banks, hospitals and even your neighbourhood park, you are sure to find that an camera keeping vigil.

A CCTV security system is typically comprised of 4 components: the camera, lens, monitor, and recorder.

The camera is the most important part as it is the device that captures images. This camera comes attached with a motor, helping it to focus the lens on different sections of its field of vision. Once the camera has picked an image, it sends the image, wired or wirelessly to a monitor and a recorder. This recorder can be connected to the Internet, enabling remote viewing from your smartphone, tablet or computer.

How a CCTV system works.
Photo credits belong to Home Security HQ

Types of CCTV Cameras

CCTV cameras can be categorised according to a few criteria such as the types of images they can capture, the amount of frames it records per second, what connection is used to connect to a monitor or video recorder, the degree of mobility (is it able to pan, tilt or zoom?), and other special functions/characteristics such as night vision and weatherproofing.

cctv2Photo credits belong to ILikeCreative

CCTV Camera Connections

There are two main types of connections for CCTV cameras: a wired or a wireless connection.

 Wired connection

Wired, or fixed cable connection means that the camera is physically connected to the monitor or recording device via a cable. Coaxial cables that are similar to normal home TV cables are usually used. As the distance increases, signal quality decreases. For distances longer than 50 m, purchase higher quality coaxial cables.

14Photo credits belong to Huyze Bladelin  

Wireless connection

Most wireless CCTV cameras use the 2.4 Gigahertz frequency to transmit their video images to a monitor or DVR (digital video recorder). Most wireless CCTV cameras are able to send data over a range of about 60 m.

Obviously a wireless connection allows greater freedom to place CCTV cameras almost anywhere. While wireless CCTV cameras transmit their video images to a digital video recorder or monitor, many of these types of cameras must be plugged into an electrical outlet. There are, however, some CCTV cameras that are battery operated. However, they could run out of charge at the most important times and need to be replaced regularly.

15Photo credits belong to VW Tech Co. Ltd

Tape vs. Digital Video Recorders

There are two main ways to record video images that CCTV cameras capture: analog tape and digital video recorders (DVR). Most analog video recorders use VCR tapes or standard VCRs to record the images or special security time-lapse VCRs to record images for a longer period of time.

VCR Tape Recorder

A tape recorder such as a security-time lapse VCR can record CCTV camera images in either black and white or color for 2,4, 6, 8, all the way up to 960 hours, which is 40 complete days. The determining factor is how many frames per second users intend to record and how many cameras are hooked up to the VCR for recording. For instance, if a user records 30 frames per second (real time video), they will only be able to get a few hours of video captured on the recorder. If users record one frame per second or less, they can record for dozens of hours before the videotape is full. VCRs are very practical, very reliable, and affordable.

16Photo credits belong to Camera Online Store

Digital Video Recorders

There are two types of DVRs: stand-alone devices or hard drives that are connected to a computer system. DVRs work similar to VCRs, but the images they capture from the CCTV camera is digital. The amount of digital images captured on a DVR is determined by a few factors: the frames per second recorded, the amount of cameras hooked up to the DVR device, the resolution that the DVR saves the images at, and the video compression used.

17Photo credits belong to Huyze Bladelin 


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