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N
Network Management System
A system designed to keep a
network operating near maximum efficiency and to provide operator
interface to the managed system for configuring, isolating and
correcting faults, and monitoring operational performance.
Non– volatile, field–programmable memory
A type of Flash ROM
used to store configuration parameters. The ROM memory is
configurable by the user but will not clear if the unit loses power.
NTSC
1. National Television Standards Committee of the Electronic
Industries Association (EIA) — A committee which determines the
video standards for broadcast in the U.S.
2. The U.S. standard for video broadcast which uses a 3.57945
MHz
subcarrier whose phase varies with the instantaneous hue of the
televised color, and whose amplitude varies with the instantaneous
saturation of the color. A single frame (picture) in the standard
consists of 525 horizontal scanning lines. Frames are scanned at the
rate of 30 frames per second.
3. Used to describe the standard method of television transmission in
the U.S., Canada, japan, Central America, and parts of South America.
O
Ohm
A unit of measure for resistance symbolized by the Greek letter
omega
Ω
. Defined as the electrical resistance between two points of a
conductor when a constant difference of potential of 1 volt, applied
between these points produces in this conductor a current of 1 ampere,
the conductor not being the source of any electromotive force.
Overhead
A number of data bits used for error–checking, control,
timing, and other communications functions that are inserted in the
data stream as an additional to the individual data rates of the
transport stream components. Overhead must be included when
calculating the aggregate transport stream output data rate.
P
PAL
Phase Alteration Line—1. A broadcast television standard that
uses a subcarrier which is alternated 90 degrees in phase from one line
to the next to minimize hue errors in color transmission.
2. The color television transmission standard used in Europe and
other parts of the world.
Summary of Contents for TDR7
Page 17: ...Chapter 1 TDR7 Overview...
Page 18: ......
Page 25: ...Chapter 2 Installing the TDR7...
Page 26: ......
Page 48: ...Chapter 2 34 Installing the TDR7...
Page 49: ...Chapter 3 Using the Control Front Panel...
Page 50: ......
Page 78: ......
Page 79: ...Chapter 4 Using a Remote Control Device Interface...
Page 80: ......
Page 111: ...Chapter 5 Configuring the TDR7...
Page 112: ......
Page 151: ...Chapter 6 Troubleshooting...
Page 152: ......
Page 169: ...157 Appendixes Maintenance Glossary Warranty Specifications and Index...
Page 170: ...I...
Page 176: ...164 Maintenance...