Comtech-ef-data VIPERSAT File Streamer v1.2.x Manuel d'utilisateur Page 49

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Appendix A - Glossary A-5
L
L-Band A frequency band commonly used as an IF for satellite systems using block up/
down conversion. Usually 950-1450 MHz.
LAN Local Area Network
LLA Low Latency Application
LNA Low Noise Amplifier – An amplifier with very low noise temperature used as
the first amplifier in the receive chain of a satellite system.
LNB Low Noise Block – A downconvertor so called because it converts a whole
band or “block” of frequencies to a lower band. It is similar to LNA.
LNC Low Noise Converter – A combined low noise amplifier and block down
converter, usually with an L-band (typically 950-1450 MHz) IF.
LO Local Oscillator
M
M&C Monitor & Control
MAC Media Access Control – A protocol controlling access to the physical layer of
an Ethernet network.
Mb/s Mega bits per second – 1 Million bits/second. A measure of transmission speed.
See also bps & kb/s.
Modem Modulator and Demodulator units combined.
Multicast Transmitting a single message simultaneously to all recipients.
N
NAT Network Address Translation – An Internet standard that enables a local-area
network (LAN) to use one set of IP addresses for internal traffic and a second
set of addresses for external traffic.
NIC Network Interface Controller – The network interface for a PC/workstation that
provides Ethernet connectivity. Depending on the computer, the NIC can either
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