Also known as Closed Circuit Television, A CCTV is a highly popular device today having several different applications across several industries.
Every business needs to know about CCTVs and how they can help achieve some important business functions as well as the much needed security.
About CCTV
A closed circuit television refers to a set up wherein the video transmitted is closed and the components of the entire set up including camera, display, monitors and recording devices are connected directly. A CCTV system differs from the broadcast television in the way that no other receivers outside the system can pick up or store the signal from a given CCTV set up. Therefore, CCTVs are out of the purview of the Federal Communications Commission (FCC). Only those security cameras that use scrambled radio waves are required to abide by the common carrier tariffs and FCC service conditions. The CCTV systems available today do not depend on video cassette recorders. Instead, they make use of advanced digital video recorder (DVR) systems for storing video and backing up all the data.
CCTV applications
The principal use of a CCTV is security camera system. Usually in all regions, it is very common to find CCTVs in big retain shops, banks and government organizations. However, today, the CCTV systems are available at highly affordable rates making them highly popular even among small businesses and also private homes.
Widening applications of CCTVs
Today we can spot CCTVs very commonly in major cities, in the popular highways and the famous event venues. The traffic enforcement authority makes the widest use of CCTV cameras to monitor traffic patterns, managing the crisis situations during emergencies and accidents. Also, several construction projects depend on CCTVs widely. The most important application of CCTV is found with stadiums, hotels and convention centers where they are used in private television networks for broadcasting sports and other events across their facilities. Today, most of the airports and railway stations have installed CCTV systems as a measure to combat terrorism and ensure the safety of travellers.
About CCTV cameras
All types of cameras that can broadcast a signal can be connected to a CCTV system in both wired and wireless environments. PTZ cameras also known as pan/tilt/zoom cameras can enable the users control a remote camera. The kind of lens used depends on the type of application and the location where the camera is installed.
Types of CCTV cameras
Fixed aperture cameras have fixed distance coverage and they cannot be adjusted for distance and lighting aspects. These are usually low in cost than other kinds of cameras. These cameras will suit only indoor installations characterized by a constant amount of lighting. Talking of adjustable iris lenses, there are two kinds namely automatic and manual iris lenses. The former type can automatically sense the changes occurring in the lighting conditions and adjust its features to be able to provide the best pictures possible. They suit outdoor installations the best. Manual zoom lenses allow the users to manually adjust the focus area on the camera by hand. There are also motorized zoom lenses that are expensive but can support adjusting the focus remotely. The sophisticated automatic zoom lenses can focus on moving objects within their view.
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