The Vertical Interval (V.I.) is the part of the video signal that tells the monitor to start drawing a new screen. It is made up of special SYNCHRONIZATION pulses with no picture elements. This part of the video allows special command and control signals to
Criminals will quite often enter a building by breaking through a wall or ceiling effectively by-passing the perimeter security entirely. Care must be taken to provide detection measures that do not rely on perimeter protection alone.
Hearing and speech are one of mankind's most powerful tools. We rely heavily on the use of these faculties for our day-to-day living. Yet in the average security installation this audio information is not available to security personnel responsible for the safety and security of
Ghosts and Ringing become more evident as the length of the coaxial cable becomes greater. The ringing effect (where a white-to-black or black-to-white transition in the picture is repeated many times in close succession) occurs with short cable runs of 50 to 200 feet. Obvious
There are many applications where a video di-plexer is the right choice. This is controlled by the cost of making the connection between camera and monitor or DVR. Coaxial cable or twisted pair wire is the lowest cost way to install the run. However if
Have you ever had interference in your CCTV monitor that exhibited dozens of narrow vertical lines either black or white, and as thin as a pencil line. They may be staggered or jagged from the top of the screen to the bottom and may
If you have a video image that goes on and off every few seconds your installation is probably suffering from a combination of two common CCTV problems.
When Video Ground Loop problems or 60 cycle Bars occur, they are easy to see on a video monitor. They look like a horizontal band or bar across the video monitor that slowly moves up the video screen. These bars can be barely noticeable, or
Have you ever installed a fiber optic video transmitter / receiver and discovered that you were not getting a good signal output and you knew you were putting in a good video signal but you were not getting the same good signal out.
