Design of CCTV
Design of CCTV (Closed Circuit TeleVision): modern surveillance systems can be divaided on two major tips:
1.Ethernet based systems – IP cameras and video servers (DVRs) using SCS (Structured Cabling Systems) for phisical layer to trasmit video over Ethernet frame and protocols TCP , UDP , HTTP , DHCP и др. Managment and setup from PC through WEB interface and software. High quality of recording. Mounting in 19″ standard telecommunication rack.
2.Clasic coaxial based systems – Cameras with TV out, multiplexers, quads, switchers, time laps recorders and etc.
Usefully: Dependence between lens size and distanse to observe Lens.