A basic introduction to CCTV cameras
Specification of the right CCTV camera for a project is not always the easiest of processes. There are many factors that have to be taken into account – technical specifications, the application and its requirements, as well as any physical constraints the site may impose.
Understanding cameras
With ever-increasing product ranges available in the marketplace and technology constantly evolving to optimise performance, reliability and functionality, it is quite a challenge to make an informed decision to meet the requirements for the job whilst remaining within projected budget.
Understanding the many variables within CCTV camera technology today can only be an advantage in helping you make the right choices. At the heart of CCTV camera technology is a CCD sensor (Charge Coupled Device) that converts light into an electrical signal. This electrical signal is then processed by the camera electronics and converted to a video signal output that can then be either recorded or displayed onto a monitor.
However, the treatment of the video signal is then dependant on the type of camera. CCD chip cameras can be divided into two principal types: analogue or the more recently introduced digital versions.
These can be sub-divided further into the following types:
- medium resolution monochrome
- medium resolution colour
- high resolution monochrome
- high resolution colour
- day/night cameras that provide colour in the day and monochrome at night.
To complicate matters even further, each of the above is generally available with different levels of performance – like a car model varying from "base features" to "top of the range".
- For more information on this basic introduction to CCTV download our pdf.
The ECA would like to thank Norbain for their assistance in the preparation of this information.
Further information can be obtained from the Norbain website by clicking here.
