If youâve spent any time online searching for a used car, youâve probably seen ads for manufacturer-backed certified pre-owned (CPO) programs offered through dealerships. While you may be tempted to avoid heading to the dealerâcars for sale by private owners can be found all over Craigslist and other third-party sitesâa CPO vehicle can be a good choice for some buyers.
In the context of a CCTV camera TVL (TV Lines) refers to the horizontal resolution (the maximum number of vertical lines the camera can resolve) of the CCTV camera. TV Lines are the standard measure of an analog TV's Resolution. Rather than represent discrete locations on a grid, as Pixels in a digital Frame do, TV Lines indicate the maximum number of identifiable changes that can be produced along a single (horizontal) Scanline of an analog TV.
We began by comparing analog cameras at three TVL counts/resolutions to see what differences, if any, were present. 450 TVL vs. 700 TVL Analog Cameras. Starting with 450 TVL vs. 700 TVL, we can see that performance is close, with no real gains in the higher TVL camera. Some letters on the eye chart are more legible in the 700 TVL camera, though it begins to wash out earlier than the 450 TVL camera, negating this benefit.