COBHAM SAILOR Fleet One Manual de instalación Pagina 128

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Glossary
98-141368-A 120
POST Power On Self Test. A test sequence that runs every time the system is powered up or
reset.
R
RF Radio Frequency. Electromagnetic wave frequencies between about 3 kilohertz and about
300 gigahertz including the frequencies used for communications signals (radio,
television, cell-phone and satellite transmissions) or radar signals.
S
SAS Satellite Access Station. The gateway between the satellites and the worldwide networks
such as Internet, telephone network, cellular network etc.
SIM Subscriber Identity Module.The SIM provides secure storing of the key identifying a
mobile phone service subscriber but also subscription information, preferences and
storage of text messages.
SMS Short Messaging Service
T
TNC Threaded Neill-Concelman. A type of RF connector used for terminating coaxial cables.
The TNC connector is a threaded version of the BNC connector. The connector has a 50
Ohm impedance and operates best in the 0-11 GHz frequency spectrum.
V
VPN Virtual Private Network. A network that is constructed by using public wires to connect
nodes. You can create networks using the Internet for transporting data, using security
mechanisms so that only authorized users can access the network.
W
WLAN Wireless Local Area Network
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