Glossary
© 2013 Harmonic Inc.
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Ellipse 3000 r.3.0, Rev. B
Multimode fiber
Optical fiber designed to carry multiple light rays or modes concurrently each at a lightly
different reflection angle within the optical fiber core. Multimode fiber transmission is used
for relatively short distances because the modes tend to disperse over longer lengths. For
longer distances, singlemode fiber is used.
multiplex
The ability to combine multiple signals over a single communications line or channel.
multiplexer
A function where multiple signals are combined into a single signal. A device that merges
several lower-speed transmissions into one high-speed transmission, and vice versa.
See also
. Note that multiplexing functionality is usually built into encoders.
N
NIC
Network Interface Card.
NIM
Network Interface Module. A receiver component interface to an access method, such as
HFC, satellite, or
.
NIT
Network Information Table. This table conveys information about the physical organization of
the transport streams and the characteristics of the network. The NIT is partially documented
by MPEG-2 Systems and partially by DVB/ETSI EN 300 468.
See also
NMS
Network Management System. The NMS runs network management applications that
control, manage, and monitor Harmonic components.
NMX
The NMX Digital Service Manager provides configuration, control, monitoring, and fault
management for open digital television broadcast systems. NMX supports geographically
diverse sites through a server/client architecture, and scales to support small or large
networks.
NMX Identifier
A unique identifier that defines the NMX server. The typical numbers are 1, 2, 3, and more.
Noise level
The indication of noise in a signal, where a higher value means more noise.
