What Is CCTV?
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Nahshon Roberts
Mar 23, 2013, 10:50:11 AM3/23/13
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Article Title: What Is CCTV?
Author: Nahshon Roberts
Word Count: 525
Article URL: http://www.isnare.com/?aid=237605&ca=Computers+and+Technology
Format: 64cpl
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CCTV stands for closed circuit television. It is a system where the circuit is closed and all the elements are linked. This is different from broadcast T.V. where tuners pick up the signals from the airwaves. For purposes of this article, linked means connected by wiring, microwave, infrared, etc.
What's It Used For?
The most obvious and common use for CCTV is for security. This type of installation is used in a variety of locations such as stores, banks, and government buildings. However, there are so many other uses. It can be used for monitoring traffic. It is used in sports stadiums to focus on the audience. It can be hidden in trains and buses to detect vandalism. It can be used to monitor animals in a zoo. It can even be used to reproduce infrared vision. The applications are almost limitless.
What's In It?
It all starts with the camera. This creates the picture that is transmitted to the control area. Most CCTV cameras are not fitted with lenses. They must be obtained separately and screwed on. There is a standard screw thread although there are different mounts. Not all lenses have focus adjustment. Most have iris adjustment. Some wide angle lenses do not have a focus ring. There is a BNC jack for connecting the video cable. In the case of line powered cameras, this coaxial cable also provides power. The monitor is what receives the signal that the camera creates. A CCTV monitor is similar to a television set but it does not have tuning circuits.
Simple CCTV systems consist of a camera connected to a monitor with coaxial cable. This cable also carries the power needed for the camera. This is called a line powered camera. The Pye Observation System was such a system and was popular during the early days of CCTV. It was affordable and could be set up with a minimum of difficulty. The next big step in the technology was allowing for four cameras to be connected to the monitor simultaneously. The view could be programmed to cycle through the available cameras or go to a particular camera chosen by the user.
Record For Posterity
Another big advance was when footage could be recorded and stored. The footage would be played back according to the viewing cycle the user chose. Once the footage is recorded, it cannot be changed to go to a different camera. The next step would be cameras that were able move and swivel. Simple platforms that move on a horizontal plane are called scanners. If a platform moves on both vertical and horizontal units it is called a pan, tilt unit.
The concept of CCTV is simple enough to understand. It is the application of such technology that still holds many undiscovered gems. Such a simple concept can be tapped for its limitless potential. And for the end user, it can serve as a great tool to accomplish many different things. In the end, that is the most important thing.
About The Author: Have you decided to invest in CCTV (http://www.video-surveillance-guide.com)? Visit http://Video-Surveillance-Guide.com for more information before you choose a CCTV camera (http://www.video-surveillance-guide.com/cctv-camera-systems.htm) or home surveillance camera (http://www.video-surveillance-guide.com
Please use the HTML version of this article at:
http://www.isnare.com/html.php?aid=237605
*********************** ARTICLE END ***********************
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Message delivered directly to members of the group:
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*****************************************************************
Please consider this free-reprint article written by:
Nahshon Roberts
*****************************
IMPORTANT - Publication/Reprint Terms
- You have permission to publish this article electronically in free-only publications such as a website or an ezine as long as the bylines are included.
- You are not allowed to use this article for commercial purposes. The article should only be reprinted in a publicly accessible website and not in a members-only commercial site.
- You are not allowed to post/reprint this article in any sites/publications that contains or supports hate, violence, porn and warez or any indecent and illegal sites/publications.
- You are not allowed to use this article in UCE (Unsolicited Commercial Email) or SPAM. This article MUST be distributed in an opt-in email list only.
- If you distribute this article in an ezine or newsletter, we ask that you send a copy of the newsletter or ezine that contains the article to http://www.isnare.com/eta.php?aid=237605
- If you post this article in a website/forum/blog, ALL links MUST be set to hyperlinks and we ask that you send a copy of the URL where the article is posted to http://www.isnare.com/eta.php?aid=237605
- We request that you ask permission from the author if you want to publish this article in print.
The role of iSnare.com is only to distribute this article as part of its Article Distribution feature ( http://www.isnare.com/distribution.php ). iSnare.com does NOT own this article, please respect the author's copyright and this publication/reprint terms. If you do not agree to any of these terms, please do not reprint or publish this article.
*****************************
Article Title: What Is CCTV?
Author: Nahshon Roberts
Word Count: 525
Article URL: http://www.isnare.com/?aid=237605&ca=Computers+and+Technology
Format: 64cpl
Contact The Author: http://www.isnare.com/eta.php?aid=237605
Easy Publish Tool: http://www.isnare.com/html.php?aid=237605
*********************** ARTICLE START ***********************
CCTV stands for closed circuit television. It is a system where the circuit is closed and all the elements are linked. This is different from broadcast T.V. where tuners pick up the signals from the airwaves. For purposes of this article, linked means connected by wiring, microwave, infrared, etc.
What's It Used For?
The most obvious and common use for CCTV is for security. This type of installation is used in a variety of locations such as stores, banks, and government buildings. However, there are so many other uses. It can be used for monitoring traffic. It is used in sports stadiums to focus on the audience. It can be hidden in trains and buses to detect vandalism. It can be used to monitor animals in a zoo. It can even be used to reproduce infrared vision. The applications are almost limitless.
What's In It?
It all starts with the camera. This creates the picture that is transmitted to the control area. Most CCTV cameras are not fitted with lenses. They must be obtained separately and screwed on. There is a standard screw thread although there are different mounts. Not all lenses have focus adjustment. Most have iris adjustment. Some wide angle lenses do not have a focus ring. There is a BNC jack for connecting the video cable. In the case of line powered cameras, this coaxial cable also provides power. The monitor is what receives the signal that the camera creates. A CCTV monitor is similar to a television set but it does not have tuning circuits.
Simple CCTV systems consist of a camera connected to a monitor with coaxial cable. This cable also carries the power needed for the camera. This is called a line powered camera. The Pye Observation System was such a system and was popular during the early days of CCTV. It was affordable and could be set up with a minimum of difficulty. The next big step in the technology was allowing for four cameras to be connected to the monitor simultaneously. The view could be programmed to cycle through the available cameras or go to a particular camera chosen by the user.
Record For Posterity
Another big advance was when footage could be recorded and stored. The footage would be played back according to the viewing cycle the user chose. Once the footage is recorded, it cannot be changed to go to a different camera. The next step would be cameras that were able move and swivel. Simple platforms that move on a horizontal plane are called scanners. If a platform moves on both vertical and horizontal units it is called a pan, tilt unit.
The concept of CCTV is simple enough to understand. It is the application of such technology that still holds many undiscovered gems. Such a simple concept can be tapped for its limitless potential. And for the end user, it can serve as a great tool to accomplish many different things. In the end, that is the most important thing.
About The Author: Have you decided to invest in CCTV (http://www.video-surveillance-guide.com)? Visit http://Video-Surveillance-Guide.com for more information before you choose a CCTV camera (http://www.video-surveillance-guide.com/cctv-camera-systems.htm) or home surveillance camera (http://www.video-surveillance-guide.com
Please use the HTML version of this article at:
http://www.isnare.com/html.php?aid=237605
*********************** ARTICLE END ***********************
- To distribute your articles go to http://www.isnare.com/distribution.php
- For more free-reprint articles go to http://www.isnare.com
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