KnowledgeSeeker

Hi there, i just started to learn what is CCTV all about. so do anyone of you mind to tell me what does TVL mean? Is there any big difference between a dome camera with 380TVL and 480 TVL? Spec below which 1 better resolution, save cost,clear view? eg: for Day use . Does TVL's value effect the output? Please assist me. Thank You. 1) IR Space Dome Camera (380TVL) 1/3" SONY Super HAD CCD, 380TVL, 3.8mm Fixed Lens, AWB, AGC, 100mm dome size, 2-Axis, 12VDC, 24 LEDs, 1 CdS Sensor, 0.00Lux(IR LED On) IR LED's Visibility Range : 15 meter (850nm, 30˚) and 2) 1/3" SONY Super HAD CCD, 480TVL, 3.8 mm Fixed lens, AWB, AGC, 85mm dome size, 2-Axis

Hi guys, i would like to ask thos experts...how long can coaxial cable support up to? what cable / method should i use if my destination from cameras to a DVR range is about 300 - 400m ? Is there any hardware like switch for coaxial ? Please assist me Thank You.

Hello, Wow...Thanks again wattwire. Ok.. Actually i would like to set up CCTV system for my house ( inside the house and house compound ). The distance between cameras and the recording equipments is about 250 meter , 450meters far ,maybe some of them further....And can you roughly explain what is Cat5e with passive baluns and Cat5e with active baluns ? Thank You

Make sure your coax has a solid copper center conductor and copper braided shielding. There should be no aluminum nor steel used by the cable. If you're using siamese cable, the ikegami document doesn't apply--the run lengths are much shorter for the power conductors due to voltage drop. I can't make heads or tails out of this question, "Is there any hardware like switch for coaxial ?" -dw hi wattwire, Thanks for your useful answer... sry for my bad english. what im trying to ask is, is there any hardware can be define as a " booster" for coaxial cable? eg: the max length of cat5e is about 80m--100m right? how abt coaxial cable?if the coaxial reaches it limitation, is there any hardware to boost it?i want to know the max length coaxial cable can be apply to a long distance between camera and monitor/ DVR. Thank You.