Cameras The starting point for any CCTV system must be the camera. The camera creates the picture that will be transmitted to the control position. Apart from special designs CCTV cameras are not fitted with a lens. The lens must be provided separately and screwed...
Lenses The lens is an optical device for focusing a desired scene onto the imaging device in a CCTV camera. Selecting the most appropriate lens can be a complex task because lenses have a number of characteristics that must be considered to match a particular...
Monitors The monitor receives the transmitted electronic video signal from the camera from the paints it across a monitor to display an image to a viewer. Although similar in function to a TV, a CCTV monitor provides higher lines of resolution (better picture quality)...
Recording Devices Time-lapse VCRs have been used as a storage medium for some time. VCRs have some drawbacks including, introduction of noise, wear and tear and the simple requirement that the tape needs to be rewound to access information. In a practical situation...
Pan, Tilts and Domes CCTV cameras can be fixed or have pan, tilt, and zoom (PTZ) capabilities. Fixed cameras are mounted on a fixed bracket and cannot move in response to operator commands. PTZ cameras are motor driven and can pan left or right, tilt up or down, and...
