I have to take up the section related to CCTV, Camera including Digital camera i.e Audio, vedio systems division includes vedio shooting, display, recording and replay etc.

Hence I want to know about the basic working principle, types of cameras available in the market, Audio systems available in the market like intercoms, walkies-talkies etc., handling precautions, cables, tools and other accessories to be used and their important specifications like band width of the cable, type of cable frequencies involved etc to have the basic knowledge to handle the section properly

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please send the ppt to my e-mail subbaraovakkalagadda[at]gmail.com