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Closed Circuit TV Systems

Closed circuit TV is a product that has come of age. Pricing has become more reasonable, and equipment has become more powerful. Cameras are available for both indoor and outdoor applications (with special housings). Cameras can be overt or covert with wide angle or telephoto lenses. While black and white cameras will give the best picture in low light applications, color cameras have become more available with pretty good low light capability and still give better overall recognition of individuals in the picture. Closed circuit systems are individually designed for the application. They consist of the following basic pieces, and expand beyond there to systems that can become very high tech based upon your needs.

Cameras.

1) Hint... Use black & white for lower light levels (outdoor at night). Use color for indoor constant light levels use overt cameras to deter crime by making their presence known (remember in most instances you do not want to catch people stealing from you, you simply want them to not do it!) Use covert cameras to catch crime by keeping the camera existence and location a secret.

2) Hint... Use black & white 9" monitor to view a single camera or multiple cameras on a switcher (change from camera 1, to camera 2, etc.) Use black & white 12" monitor for applications where the monitor is farther away, use large screen ( up to 25" ) for multiple cameras on one screen ( up to 16 )

3) Hint... Use "wide angle" lens (3mm to 6mm) to view large areas with little detail (look at a 400' wide parking lot narrowed down to 12" and you will see movement but there is no way you could recognize an individual) or use the same lens to watch a small lobby area (because you are closer to the subject, you would be able to see the details and recognize an individual). Use "telephoto" lens (8mm & up) to view a small area that is far off (a driveway that is 100' away but only 15' across)

4) Hint... Use a "varifocal" lens (adjusts from wide angle to telephoto) if the camera is moved often or you can use a motorized lens with a joystick control for remote operation (also requires ptz - pan, tilt and zoom control of the camera / lens)

5) Hint... Use an "auto-iris" lens for all outdoor applications (motorized lens that opens and closes to compensate for varying light conditions)

6) Hint... Use an outdoor housing with a heater enclosed, to prevent fogging and freezing of the motorized lens, and protect the equipment from rain.