CCTV (continued)

Evaluation of Scene and Illumination

The existing lighting should be evaluated for the level, direction and spectral content. Optimal light sources are those, which have a spectrum that best matches the camera imaging device response. If additional lighting is required, the number, type, siting and power of the light sources should be determined.

Control Centre Configuration

The operational requirement and personnel available are the factors determining the number of control locations and equipment configuration of the control centre.

Number of Monitors and Their Screen Size

• The number of monitors should be sufficient to display the maximum number of simultaneous alarms as stated in the operational requirement.
• The monitor screen size should be selected in relation to the viewing distance. The recommended viewing distance is approximately 5 times the displayed picture diagonal.