Harmonic ProView 7000 User Manual page 210

Glossary
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Numerics A B C D E F G H I J L M N O P Q
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R S T U V W Y
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L
LC
A term meaning either "low complexity" (in the case of AAC audio coding) or a high-density optical
connector used for single-mode and multimode fiber-optic applications.
LNA
Low Noise Amplifier. The preamplifier mounted at the focus of a parabolic antenna and which
amplifies the received signal for a downconverter mounted nearby which then feeds an earth station
receiver. It is designed to contribute the least amount of thermal noise to the received signal.
LNB
Low Noise Block downconverter. A combination low noise amplifier and downconverter built into one
device. An LNB is usually located at the center of the satellite dish.
LSD
Low Speed Data.
luma
The brightness of the video signal. This term is preferred over "luminance" for video signals. See
also chroma.
M
MAC
Media Access Control. As defined by IEEE 802, the MAC provides the lower portion of the datalink
layer, which is the OSI layer that is responsible for data transfer across a single physical connection, or
series of bridged connections, between two network entities. The MAC differs for various physical
media.
MAC address
The permanent identifier for a device. It consists of six octets separated by colons, for example,
00:20:A3:xx:xx:xx. The first six characters identify the manufacturer. Harmonic assigns the next six
characters as a unique device identifier.
Mbaud
Megabaud, which is the signal rate of a line, expressed in millions. It can also be the switching speed,
or number of transitions (voltage or frequency changes), per second.
monaural
A channel that has a single audio signal.
MPE
A PID which can contain anything.
© 2012 Harmonic Inc. 210 ProView 7000 v.2.6, Rev. E