NCC College: CCTV Camera

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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgyT9o9Ea2Z_F1bFnlkiDkHw7b52fulVxN51yxNyVvx4KVtEHyIa-GIlPElR95yZrw35JNFyRjRybX0-AzAYjboqyLIKIvlo1tAUrfRDYK1PqzalnuUxnpr04ihL6y6Xkmod4F77cwjoCw/s1600/ncc-cctv-camera.jpeg" imageanchor="1" style="clear: right; float: right; margin-bottom: 1em; margin-left: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgyT9o9Ea2Z_F1bFnlkiDkHw7b52fulVxN51yxNyVvx4KVtEHyIa-GIlPElR95yZrw35JNFyRjRybX0-AzAYjboqyLIKIvlo1tAUrfRDYK1PqzalnuUxnpr04ihL6y6Xkmod4F77cwjoCw/s1600/ncc-cctv-camera.jpeg" /></a>CCTV: Closed Circuit TeleVision, is a TV system that
 does not broadcast TV signals to public but transmits them over to 
limited monitor(s). CCTV system usually utilizes CCD video cameras (to 
produce the video), cable or wireless transmitters/receivers or Internet
 (to transmit the video), and monitors (to see the video). CCTV system 
is not only applied to the security and surveillance purpose but also to
 the other fields like laboratory in schools or in private companies, 
even to production lines in factories. As the application of CCTV system
 increased, the CCTV industry has developed variety of CCTV equipment 
like Time Lapse VCRs, combiners, infrared illuminators, Pan/Tilt, etc. 
The most recent development is web camera server which uses the Internet
 for remote surveillance. 

Coaxial Cable
 Coaxial cable has proper electrical features to transmit the video 
signals from the camera to the monitor. Among various coaxial cables, 
RG59/U is most common with a 75-ohm impedance and can be installed up to
 450ft distance without loosing the video quality. This cable is usually
 connected by BNC connectors at both ends.
 
Fiber-Optic Cable
 Fiber-Optic Cable is not affected by electrical interference and has
 no problem even in contact with high-voltage power. It transmits video 
signals with extremely high efficiency and can run up to miles. The 
problem is that it is expensive and difficult to handle.
 
RCA Cable
 RCA cable is not standard in the industry but is used a lot, 
specially for short distances up to 250ft. Twisted wire from 14 to 24 
AWG (American Wire Gauge) with RCA connections at both ends will work as
 RCA cable. Even though its transmission quality is not as good as 
Coaxial Cable or Fiber-Optic, RCA cable is widely used because it is 
very easy to handle and has no problem of loosing video signal up to 
250ft distance.
 
DIN Cable
 Most observation systems which are pre-assembled at the factory have
 DIN cables with DIN connectors at both ends. DIN cables have 5 or 6 
wires inside the configuration of which is, for example; wire 1 is for 
video, wire 2 is for audio, wire 3 is for power(12VDC, positive), wire 4
 and 5 are for speaker(positive and negative), wire 6 is for ground. 
Mini DIN cable, which is used for mini camera package, comes with 4 
wires inside. DIN cable, large or mini, can run up to 250 ft distance 
without loosing the video quality.
 
Cable Tie
 Because the transmission of video signals is directly related to the
 spacing between the inner wires or conductor and shield, any changes in
 the distance between the wires or conductor and shield will degrade the
 picture quality. This change may be caused by tight bends, kinking, 
indentations, stapling or others. That's why you need to use suitable 
cable tie which are sold at any hardware or electrical parts shops when 
working with Coaxial Cable or DIN cable.</div>

CCTV Camera Training

CCTV: Closed Circuit TeleVision, is a TV system that does not broadcast TV signals to public but transmits them over to limited monitor...

NCC College

CCTV Camera Training

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