Harmonic Ellipse 3000, Руководство пользователя

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Glossary
Numerics
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© 2013 Harmonic Inc. 384 Ellipse 3000 r.3.0, Rev. B
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.
LFE
Low-Frequency Effects.
Loader Utility
A tool for saving the device configuration and for uploading it to any device.
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.
LSCP
Lightweight Streaming Control Protocol.
LSD
Low Speed Data.
luma
The brightness of the video signal. This term is preferred over “luminance” for video signals.
See also
chroma
.
M
M2P
The Harmonic MPEG-2 parallel interface for carrying MPEG-2 transport streams.
M2S
The Harmonic MPEG-2 serial interface for carrying MPEG-2 transport streams. Developed
before DVB-ASI became standardized.
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.