General telecom

General telecom

Terms relating to telecommunication or communication through technological means.

Industry: Telecommunications

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General telecom

Idle character

Telecommunications; General telecom

A control character that is transmitted when no useful information is being transmitted.

Substitute character (SUB)

Telecommunications; General telecom

A control character that is used in the place of a character that is recognised to be invalid or in error or that cannot be represented on a given device.

Conduction band

Telecommunications; General telecom

In a semiconductor, the range of electron energy, higher than that of the valence band, sufficient to make the electrons free to move from atom to atom under the influence of an applied electric ...

Periapsis

Telecommunications; General telecom

In a satellite orbit, the point that is closest to the gravitational centre of the system consisting of the primary body and the satellite. Note: In an orbit about the Earth, periapsis is called ...

Cross-site link

Telecommunications; General telecom

In a satellite communications system, the signal power and control connexions between the components of an Earth station. Note: Examples of cross-site links are (a) links between transmitters and ...

Passive satellite

Telecommunications; General telecom

In a satellite communications system, a satellite that only reflects signals from one Earth station to another, or from several Earth stations to several others. Note: Although the satellite acts ...

In a rotating communications satellite, an antenna with a main beam that is continuously redirected with respect to the satellite so that the antenna illuminates a given area on the surface of the ...