Earth Station

   The term used to describe the combination or antenna, low-noise amplifier (LNA), down-converter, and receiver electronics. used to receive a signal transmitted by a satellite. Earth Station antennas vary in size from the.2 foot to 12 foot (65 centimeters to 3.7 meters) diameter size used for TV reception to as large as 100 feet (30 meters) in diameter sometimes used for international communications. The typical antenna used for INTELSAT communication is today 13 to 18 meters or 40 to 60 feet.

Echo Canceller

   An electronic circuit which attenuates or eliminates the echo effect on satellite telephony links. Echo cancellers are largely replacing obsolete echo suppressors.

Educational Broadband Service

   Educational Broadband Service (EBS) is the new designation given by the Federal Communications Commission for certain microwave frequencies available to be licensed by the FCC to non-profit educational entities. EBS was formerly known as Instructional Television Fixed Service (ITFS).

Electronic Book (E-book)

   The digital media equivalent of a printed book. Such documents are either read on personal computers or on dedicated hardware devices known as e-book readers.

Electronic Mail (E-mail)

   Sending messages from one computer user to another.

Electronic Text (E-text)

   Any text-based information that is available in a digitally encoded human-readable format and read by electronic means.

Encoder

   A device used to electronically alter a signal so that it can only be viewed on a receiver equipped with a special decoder.

Ethernet

   The standard local area network (LAN) access method. A specification for "LAN," "LAN connection" or "network card" automatically implies Ethernet without saying so. Ethernet connects devices to a company or home network as well as to a cable modem or DSL modem for Internet access.