How Surveillance Cameras Work


Closed circuit television (CCTV) uses one or more video cameras to send video images and sometimes audio images to a monitor, a set of monitors or video recorder. It is different from standard TV as a standard TV openly broadcasts signals to the public. CCTV uses wireless transmission or a wired transmission to send broadcast video cameras to monitors and recording equipment. Most surveillance cameras are used for surveillance and security.

There are different types of CCTV cameras which are classified according to the type of images they capture, the amount of frames they can take per minute , the type of connection to monitor or video recording device and special functions they provide. Surveillance cameras typically capture two video images in black and white or color. Many CCTV cameras are equipped with night vision capabilities that allow them to view and record low light images using special technology.

Frames per second refer to the amounts of full frames that a video camera captures and sends to a recording device or monitor per second. Most CCTV cameras can capture 30 or more frames per second. Time from January to June fps can catch and record perpetrator to commit a crime.

The pan tilt zoom (PTZ) are examples of New York CCTV cameras that allow a person controlling the surveillance of a zone move the camera remotely. PTZ cameras allow the person monitoring to move the camera panning from right to left, up and down tilt, and zoom in close-up from a tight angle to a wide angle. Surveillance cameras also have special features which are designed for specialized uses. For example, small surveillance cameras used for spying are made for night vision and for indoor and outdoor applications.

There are two types of connections for CCTV cameras: fixed cable and wireless connection. A CCTV camera with a fixed connection cable is connected to the control device or record via a cable that is similar to the home TV cables. A wireless connection allows CCTV cameras or Internet cameras to be placed anywhere.

wireless security cameras Long Island send video to a monitor or DVR (digital video recorder). They also require 2.4 Gigahertz frequencies to transmit images through most walls and obstacles. Most wireless CCTV can send data to a range of about 200 feet.

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