E

Earth station

Earth-based dishes, receivers, transmitters and other equipment needed to receive satellite signals.

 

EIRP

Effective isotropic radiated power

A measure of a satellite’s signal strength from the ground.


Elevation

Angle between the earth's surface and a particular satellite at a given reception point 0° for horizontal angle and 90° o for vertical.


Encryption Systems

Encryption enables programme providers to control the distribution of pay-TV television channels, for example. Only authorised viewers can view the encrypted channels. Examples of encryption systems are VIACCESS, NDS, and CONAX. See also Smart CardSmart Card.