Comtech EF Data Vipersat Circuit Scheduler v3.7.x ArrangeLink - Manual (Page 81)

Appendix A - Glossary A-5
IF Intermediate Frequency – In satellite systems, IF frequencies are usually
centered around 70 or 140 MHz (video/TV), or 1200 MHz (L-band).
IFL Intra-Facility Link – The coaxial cabling used to connect the satellite ODU to
the IDU. Carries the inbound and the outbound signals, and the 24 VDC for the
LNB.
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
Kb/s Kilo bits per second – 1000 bits/second. A measure of transmission speed. See
also bps & Mb/s.
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.
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.
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. The LNB (similar to an LNA) is
part of the satellite ODU/transceiver.
LNC Low Noise Converter – A combined low noise amplifier and block down
converter, typically with an L-band IF.