TECHNOLOGY NEWS

The basic role of these devices is to enable monitoring of the use of more than one camera. They allow you to attach to one monitor and VCR, a few cameras. Please note that this is the price for the deterioration of the surveillance. There follows a group of these devices: changers and quads (dividers) and video multiplexery and dies. Changers. Changer (also called a switch) is a device that allows you to attach a signal within a specified time of one selected camera to the monitor output. Chaining is implemented in a manual, by pressing the button associated with that camera, or automatically. Each changer allows you to set the time after which the camera is accompanied by another, usually this time can vary from 0.5 s to 20 s. The more expensive devices can also be programmed to switch complex sequences, including displaying a number or name of the camera. Even more sophisticated switches have built-in motion detection cameras. In the case if either input is not used, you can turn suppresses the entrance to the display. Changer is usually from several to a dozen or so hits (the most common are 2, 4, 8, 12 and 16 entrances) and one or two outputs to connect the monitor. The second output is normally used to connect an additional monitor to observe the image from one selected camera. Like monitors, changers may have known. flight, or the additional output. Then each entry is associated with each output, which is present in the same signal. It can be used to connect the monitor or a VCR on which it is made continuous registration of the image with the camera especially important. Some models changers can be remotely controlled using an additional infrared remote and connected in series to increase the number of inputs (up to tens of video inputs). Often in tandem with the video inputs are input audio signal. Some changers are equipped with alarm input and output that are compatible with the standard used in emergency, or in infrared sensors. Depending on the number of cameras used, the socket D-Sub 25 or Sub-D 9 At the alarm, you can attach a motion detector for example, then the appearance of motion will force the changer immediately switch to the camera associated with the input device. In addition to the emergency exit there is a signal that can be used for the alarm. Changer is the price advantage due to the fact that it is a simple electronic switch, it is usually the lowest in this group of devices.