Comtech EF Data VMS v3.12.x Vipersat - Manual (Page 538)

MN/22156, rev 12
H-6 VMS User Guide
IGMP Internet Group Management Protocol – An IP communications protocol used
by network hosts and adjacent routers to establish multicast group member-
ships.
Image A binary firmware file that provides the operational code for the processor(s) in
a network unit.
IP Internet Protocol – A format for data packets used on networks accessing the
Internet.
ISP Internet Service Provider – A company providing Internet access.
ITU International Telecommunications Union
K
kbps kilo bits per second – 1000 bits/second. A measure of the bit rate or transmis-
sion speed of a digital communication link. See also bps and Mbps.
Ku-band A frequency band used for satellite communications. For terrestrial earth
stations, the receive frequency band is in the range 10.95–12.75 GHz and the
transmit frequency band is 13.75–14.5 GHz. See also C-band and L-band.
L
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.