E

EBU. European Broadcasting Union.
EIA. Electronic Industries Association, which changed in 1997 to Electronic Industries Alliance,
which has recommended the television standard used in the US, Canada and Japan, based on
525 lines interlaced scanning.Formerly known as RMA or RETMA. It also specifies the RS data standards.
Encoder. A device that superimposes electronic signal information on other electronic signals.
Encryption. The rearrangement of the bit stream of a previously digitally encoded signal in a
systematic fashion to make the information unrecognizable until restoredon receipt of the
necessary authorization key. This technique is used for securing informationtransmitted
over a communication channel with the intent of excludingall other than authorized
receivers from interpreting the message. Can be used for voice,video and other
communications signals.
EI. Electronic Iris. Electronic circuits in a camera that enable the camera shutter mode to be
automatically controlled to vary the output video level, much as an auto iris in the lens would
do. It enables manual iris lenses to be used where light levels vary.
ENG camera. Electronic News Gathering camera. Refers to CCD cameras in the broadcast
industry used for outside broadcasts when gathering news.
EPROM. Erasable and Programmable Read Only Memory. An electronic chip used in many
different security products that stores software instructions forperforming various operations.
Equalizer. Equipment designed to compensate for loss and delay frequency effects within a
system. A component or circuit that allows for the adjustment of asignal across a given band.
Ethernet. A local area network used for connecting computers, printers, workstations,
terminals, etc. within the same building. Ethernet operates over twisted wireand coaxial
cable at speeds up to 100 Mbps (100 Base T).
Eur. Ing. European Engineer. A title conferred on Professional engineers, by the
European Federation of National Engineering Associations (FEANI).
External synchronization. A means of ensuring that all equipment is synchronized to the one
source.
EXABYTE. When written in capital letters, it is the name of a manufacturer of a tape based
mass storage device. When in lower case it is 2 to the 60th power
[260 or 1,152,921,504,606,846,976] bytes. One exabyte is equal to 1,024 petabytes.