Glossary
98-145510-E Glossary-2
G
GNSS Global Navigation Satellite System, e.g. GPS.
GPS Global Positioning System. A system of satellites, computers, and receivers that is able to
determine the latitude and longitude of a receiver on Earth by calculating the time
difference for signals from different satellites to reach the receiver.
K
KDM Keyboard and Display Module of the ACU
L
LAN Local Area Network. A computer network covering a small physical area, like a home,
office, school or airport. The defining characteristics of LANs, in contrast to wide-area
networks (WANs), include their usually higher data-transfer rates, smaller geographic area,
and lack of a need for leased telecommunication lines.
LED Light Emitting Diode
LNB Low Noise Blockdown converter. A device used to amplify or boost the weak received
signal without amplifying the noise signals (hence the “low noise” part of LNB) and to
convert the high frequencies of the signal into lower frequencies, a process called down
converting, for conveyance to the indoor equipment (demodulator) for processing.
M
MIB Management Information Base
O
ODU OutDoor Unit. The part of the system that is placed outdoors, e.g. the antenna.
OMT Ortho Mode Transducer
P
PAST Person Activated Self Test
POST Power On Self Test. A system test that is activated each time the system is powered on.
R
RF Radio Frequency. Electromagnetic wave frequencies between about 3 kHz and about 300
GHz including the frequencies used for communications signals (radio, television, cell-
phone and satellite transmissions) or radar signals.
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