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Definitions (67)
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store
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AC Adaptor
Also called a power supply. All CCTV devices needs power of some sort. Each device has its own power requirements (usually 12 volts with a minimum amperage). The power coming out of the wall (in the U [..]
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Alarm Input
An input connection to a security VCR or DVR that triggers the unit to start recording if the alarm is triggered.
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Analog
There are two main ways of doing things electronically, analog or digital. An analog signal can be represented as a series of sine waves. The term originated because the modulation of the carrier wave [..]
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analog system
Most cameras used in cctv applications are analog. Security VCRs, switchers, multiplexors and quads also are analog devices. Any cctv system that consists of analog devices are considered analog syste [..]
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ANGLE OF VIEW
For security cameras, this refers to the angular range in degrees that you can focus the camera on without distorting the image. When focusing close up, you can generally see a wide angle of view. If [..]
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aperture
The opening of a lens which controls the amount of light let into the camera. The size of the aperture is controlled by the iris adjustment. By increasing the f stop number (f1.4, f1.8, f2.8, etc.) le [..]
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armor dome camera
These cameras are designed to resist vandalism by using a hi-impact reinforced polycarbonate dome casing.
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audio
Most cameras capture 'video' only (what you can see) - some come with audio too (sound). You can add a microphone to a security system to capture audio if needed. To record the sound, your r [..]
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