Welcome to the
"Frequently Asked Questions"
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Doktor Jons

Guide to Closed Circuit TV (CCTV)

So would you like to play "Spot the CCTV Camera?". Eagle eyed visitors may recognise the profusion of street furniture, surrounding a single heritage dome camera keeping watch over part  of Londons' prestigious Oxford Street shopping area.

"Questions, questions ? .... where have
all the answers gone"

Frequently Asked Questions (FAQ's)

System Design


Q1) We need to install a CCTV system in our commercial premises; should we be looking at the equipment first, or the application?
DJ says " Never, ever ....ever look at buying CCTV equipment, until you've thoroughly researched and planned your systems requirements. Understanding your objectives is paramount.

Q2) We would like to fit four CCTV cameras in our small office; What type of power supply should we consider for the cameras?
DJ says " Without all the information, the answer will have to be deliberately vague. If you want to do the work yourself, the easiest and safest option would be to go for cameras that operate on 12v DC.
The low grade power supply cables, could then be run alongside the video cables, and perhaps taken to the monitoring location, where a seperate 1 amp regulated power supply adaptor could be used for
each camera. If you use a single larger capacity Power Supply to drive every camera, you risk loosing all your cameras to a simple component failure. "Line powered" cameras are equally safe and very simple to install, but your choice will be somewhat limited; also the overall costs will increase significantly. Mains power could be
used, but ideally, these supply connections must be installed by a suitably competent / qualified installer (or electrician).


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