bentech 1 Posted August 17, 2016 Hi , What is the maximum resolution for an analog CCTV camera ? Analog often refers to TVL resolution . Is it 540TVL in color ? or 960H ? I saw a few Analog HD 1080P or 720P , possible ? Tks Share this post Link to post Share on other sites
GREGRUSH 0 Posted August 19, 2016 The definition of TVLs (or its full name: HTVLs) is: Horizontal Television Lines: the number of VERTICAL black and white lines that can be counted horizontally on a space equal to the height of the screen. Ok, to put it in layman terms: take a TV screen (aspect ration 4:3, that is 4 wide, 3 high) and put a picture in it that consists of vertical black and white lines. You can distinctly see the lines (not a gray pattern). Then measure the height of the screen and use that measurement to set the limit of the amount of lines you can count from left to right . You should end up with a perfect square full of black and white lines. COUNT them (horizontally). if you get 500. that is 500 TVLs. That is how TVLs work and it applies to analog cameras. The maximum amount of TVLs for NTSC is 704. for PAL is 720. 960H refers to DVR resolution. It can handle cameras with 700 TVLs. it is also called WD1 (Wide D1) coz it is a system that gives you a "better picture" by taking the pixels generated on a D1 system and duplicating each one. It is also called by us the "Fat D1" HD is High Definition, but still Analog (not IP). Yes, they can be 1080p or 720p. Bue be careful: Ive also seen 1200TVL cameras (he he he): Im sure some clerk got busy making out some formulas converting TVLs to pixels or pixels to TVLs in order to market their cameras with a bigger number. Analog cameras are soon fading away as they dont give good quality footage. These are installed by people that need a CCTV system just for legal requirement (not due to security concern). These days, most systems are either HD systems (HDSDI, HDCVI) or IP. Good luck with your system! Gregory Rovira logging out! Share this post Link to post Share on other sites
videobruce 0 Posted September 8, 2016 Don't believe the numbers on these cheap no-name Chinese cameras. For that matter that applies to all of them. Many claim 540, but AFAIC, I doubt they are doing 300. probably more like 200 lines. My guess where they got that bogus number from is the spec on the chip itself, before processing. Share this post Link to post Share on other sites
