Welcome to the
"Technical Section"
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.

All the bolt on bits of equipment ...
that make a CCTV system fly!

Video Distribution Amplifiers (VDA)

The art of designing an effective CCTV installation, often requires a considerable amount of effort in seeking to minimise the risk to overall system integrity, through the failure of a single item.

Too often, fairly complex structures are built around a single large capacity item, like a switching matrix or a multiplexer, and all the display and recording functions remain totally dependent on this one ‘box of tricks’.

For the experienced CCTV system designer, the Video Distribution Amplifier can open up a whole range of possibilities, to help minimise the exposure to unnecessary risk. The units themselves are very straightforward in operation.

A video signal, whether it be from a camera or other source, is fed into a VDA, and is then amplified and distributed at the same level, to a number of individual outputs which can then be connected to various other pieces of equipment, such as switchers or quad units, for example.

VDA’s are generally available in a range of sizes, with one or two inputs, and normally between four and ten outputs, either as stand alone desktop boxes, or much larger and more complex rack mount systems.

Doktor Jon would have to say from experience, that the simple basis of minimising failure related risks by intelligent design, is frequently overlooked as a cost saving exercise, on the naive belief that “it’ll never happen to us”.

That really is the difference between a very well designed CCTV system, and an installation that simply fulfils the brief. As for which is the most appropriate for your needs .... well you pays yer money, and takes yer choice!

Sync. Pulse Generator >>

The unique "TRUSTED" National CCTV Improvement Campaign

IMPORTANT: No material may be reproduced, copied or redistributed from this site,
without the express written consent of doktorjon.co.uk

All the detailed information on this site is provided in good faith; and as such, Doktor Jon
does not accept responsibility for any consequential loss, injury or disadvantage
resulting from any individual or organisation acting on the details contained herein.

© doktorjon.co.uk 2004 - 2008

Homepage...:...Gateway...:...Technical Gateway....:....Quickfind Index....:....Equipment Directory
Site Index...:...About this site....:....CCTV Helpdesk....:.... The Forum ....:....Contact Doktor Jon