![]() Watching the sequential display for long periods of time could be a cure for insomnia. SWITCHER DISADVANTAGES: While one camera is displayed and recorded, the other cameras are not visible. You save installation space and monitor and VCR costs. You can record the same images on one VCR. SWITCHER ADVANTAGES: You get to see several cameras displayed on one monitor. Switchers have been around for a long time and are still widely used in many applications. The length of time each camera is displayed is controlled through front panel controls, or, internal jumpers. Switchers typically display each camera sequentially (that’s why they are called sequential switchers). SWITCHERS: A switcher is a black box which allows you to take the inputs from several cameras, perform some electronic wizardry, then display each camera for a period of time on a single monitor. How do we solve the problem of displaying multiple cameras on one monitor and recording them on one VCR? The total cost includes the equipment, the space to install the equipment and the manpower to watch the equipment. If you want to record the camera images, you need a VCR for each camera. ![]() You need as many monitors as you have cameras. It is easy to see that multiple camera systems can get expensive. If you want to see a second image, get another camera, another cable and another monitor. In the beginning, a CCTV system consisted of a camera, a cable and a monitor. A little history will help us to understand how both products arrived on the market. Which is better? The answer depends on the application. What is the difference between a Quad and a Multiplexer? They both allow us to display and record multiple cameras. ![]() Multiplexers Contributor: Paul BroomeĬompany: Sensormatic Video Products Division
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