EIA:
is a scanning method specified by the Electrical Industry Association. RS-170 is the standard for monochrome and RS-170A is the standard for color.

Electrical filter:
is a type of electrical circuitry designed to limit transmission of certain frequencies.

Electron beam:
is a concentrated flow of electrons in a nominated direction.

Electronic shutter speed:
see Shutter speed

Shutter speed:
is the speed at which the charge is read out from the CCD chip. The factory setting is 1/50 sec (PAL) or 1/60 sec (NTSC) and can be increased up to 1/100,000 sec depending upon the camera brand. It can be changed by using dip switches or in some cases by the in built menu in the camera.

EMI Electro Magnetic Interference:
is a interference which is usually caused by any electrical equipment radiating electro magnetic frequencies.

Ergonomics:
is the study of man, machine and the environment to achieve maximum efficiency.

Event recorder:
is a type of recorder that is normally maintained in pause mode and starts recording only when activated by an alarm.

Extruded aluminium:
is aluminium processed through a die and shaped for use to construct housings for CCTV applications.

Extruded plastic:
is a process in which smoked or tinted plastic is processed and shaped to construct dome housings.