Comtech EF Data SLM-5650A Vipersat Parameter Editor - Manual (Page 70)

A-6 SLM-5650A Parameter Editor User Guide
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.
LO Local Oscillator – Component used in upconverters, downconverters, and tran-
sponders for frequency translation (heterodyne) of the carrier signal.
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 multiple destinations (group)
on the IP network.
Multi-
command
A command that allows multiple input choices in a single command execution.
N
NAT Network Address Translation – An Internet standard that enables a LAN to use
one set of IP addresses for internal (private) traffic and a second set of addresses
for external (public) traffic.
NIC Network Interface Controller – The network interface for a PC/workstation that
provides Ethernet connectivity. Depending on the computer, the NIC can either
be built into the motherboard, or be an expansion card. Some computers (e.g.,
servers) have multiple NICs, each identified by a unique IP address.
NMS Network Management System
NOC Network Operation Center – Has access to any earth station installed using the
VIPERSAT Management System (VMS). A NOC can remotely interrogate,
control, and log network activities.