As is known to all, there’s no such thing as a free lunch. When you are about to purchase CCTV Cameras and CCTV related products, how can you make sure that the CCTV Distributors or CCTV Retailers really offer you the products with the same specifications as you see on the price lists or websites? In fact, we know that some factories mark low resolution CCTV Cameras as high resolution CCTV Cameras, for instance, 420TVL Vandalproof Camera is labeled with 540TVL Resolution, when you see the price, you may find it quite good, however, you are not getting what you pay for. (TVL is Television Lines, mainly refer to the resolution of your camera here, namely how clear your camera can see.)
If you are a CCTV dealer/distributor or installer, consider investing in a CCTV Test Monitor and a standard resolution test chart. If you have the standard resolution test chart file, you can print the resolution test chart with A3 paper based on the picture standard. Next, put the test chart on the wall, and let the camera you bought to shoot the resolution test chart after you connect the camera to your CCTV test monitor. Then you need to observe the resolution test chart on the monitor, mainly to see the most lines you can see in the center or the most lines of 10 group center lines you can see. Note, if you use black and white monitor, please use over 600TVL monitor. If you use color monitor, adjust the color saturation to the lowest.