Just follow these easy steps, and soon you'll enjoy a dual-camera video surveillance system and the peace of mind that goes along with it. Start by choosing the type of video cameras you want to use and the locations where you'd like to mount them. The lux rating is the amount of light required to obtain an image. One lux is approximately the light from one candle at one meter. The number of lines determines the resolution of the camera.
Higher resolution makes it easier to distinguish fine details and recognize people at a distance.
Most standard TVs and VCRs have resolutions of less than 300 lines. You'll also want to avoid areas where the cameras will be subject to direct sunlight, which can damage the equipment and impair a camera's ability to see images. The best location is typically under a roof eave or any other location where the sunlight won't directly hit the lens. With a multi-camera surveillance system, you can use a modulator to send the video feed from each camera to a different TV channel. If you select a modulator with an extra input, you can program a third video source, like a satellite television system, VCR or DVD player, to be available for viewing on an additional.