Closed-circuit television (CCTV) is the use of video cameras to transmit a signal to a specific place, on a limited set of monitors.
A vision mixer (also called video switcher, video mixer or production switcher) is a device used to select between several different video sources and in some cases composite (mix) video sources together and add special effects. This is similar to what a mixing console does for audio.
A DVR is a digital video recorder (DVR) that records motion video in a digital format to a hard disk. This can include various models such as stand-alone, PC, television, cable or satellite. Sizes include small, portable, desktop, industrial and commercial. Software enables personal computers to extract segments of video for playback from the hard disk.
This lens calculator displays the angle of view of common CCTV lenses. The calculator is compatible with all the standard CCD sizes, such as 1/4 inch, 1/3inch etc. These are the standard CCD sizes used in CCTV and security applications.
CCTV video baluns allow traditional coax cable to be replaced by cat- 5 and other forms of twisted pair wire in CCTV video surveillance installations so that installers can use more cost effective structured cabling techniques to wire security cameras. By using video baluns, UTP wire such as cat-5 can be run over longer distances easier than coax cable and for less money. Active balun transceivers enable UTP wires for cameras to be run distances up to 1.5 KM.