Comtech EF Data Vipersat SLM-5650A User Manual page 144

L-band A frequency band commonly used as an IF for satellite systems using block up/
down conversion. Typically 950–1450 MHz Rx, 1250–1750 MHz Tx. See also
C-band and Ku-band.
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 downconverter so called because it converts a whole
band or "block" of frequencies to a lower band. The LNB (similar to an LNA) is
part of the satellite ODU/transceiver.
LNC
Low Noise Converter – A combined low noise amplifier and block downcon-
verter, typically with an L-band IF.
LO
Local Oscillator – A component used in upconverters, downconverters, and
transponders for frequency translation (heterodyne) of the carrier signal.
M&C
Monitor & Control
MAC Media Access Control – A protocol controlling access to the physical layer of
an Ethernet network.
Mbps Mega bits per second – 1 Million bits/second. A measure of the bit rate or trans-
mission speed of a digital communication link. See also bps and kbps.
Modem
Modulator and demodulator units combined.
Multicast Transmitting a single message simultaneously to multiple destinations (group)
on the IP network.
Multi- A command that allows multiple input choices in a single command execution.
command
D-6
L
M
V i p e r s a t S L M - 5 6 5 0 A U s e r G u id e