RGBLink VSP 729 - Manual (Page 18)

1. Introduction
Terms and Definitions
VSP 729 User Manual 18
Terms and Definitions
The following terms and definitions are used throughout this guide.

“ASCII”: American Standard for Information Interchange. The standard
code consisting of 7-bit coded characters (8 bits including parity check)
used to exchange information between data processing systems, data
communication systems, and associated equipment. The ASCII set
contains control characters and graphic characters.
 “Aspect ratio”: The relationship of the horizontal dimension to the
vertical dimension of an image. In viewing screens, standard TV is 4:3,
or 1.33:1; HDTV is 16:9, or 1.78:1. Sometimes the ―:1‖ is implicit,
making TV = 1.33 and HDTV = 1.78.
 “AV”: Audio visual, or audio video.
 A “Background” is an unscaled source, typically originating from a
computer. Abackground source appears at the system‘s lowest priority
— visually in back of all other sources.
 “Baudrate”：Named of J.M.E. Baudot, the inventor of the Baudot
telegraph code. The number of the electrical oscillations per second,
called baud rate. Related to, but not the same as, transfer rate in bits
per second (bps).
 “Blackburst”: The video waveform without the video elements. It
includes the vertical sync, horizontal sync, and the chroma burst
information. Blackburst is used to synchronize video equipment to
align the video output. One signal is normally used to set up an entire
video system or facility. Sometimes it is called House sync.
 “BNC”: Bayonet Neill-Concelman. A cable connector used extensively
in television and named for its inventors. A cylindrical bayonet
connector that operates with a twist-locking motion. To make the
connection, align the two curved grooves in the collar of the male
connector with the two projections on the outside of the female collar,
push, and twist. This allows the connector to lock into place without
tools.
 “Brightness”: Usually refers to the amount or intensity of video light
produced on a screen without regard to color. Sometimes called ―black
level.
 ―CAT 5‖: Category 5. Describes the network cabling standard that
consists of four unshielded twisted pairs of copper wire terminated by
RJ-45 connectors. CAT 5 cabling supports data rates up to 100 Mbps.
CAT 5 is based on the EIA/TIA 568 Commercial Building
Telecommunications Wiring Standard.
 “Color bars”: A standard test pattern of several basic colors (white,
yellow, cyan, green, magenta, red, blue, and black) as a reference for
system alignment and testing. In NTSC video, the most commonly
used color bars are the SMPTE standard color bars. In PAL video, the
most commonly used color bars are eight full field bars. In the
computer, the most commonly used color bars are two rows of
reversed color bars.
 “Color burst”: In color TV systems, a burst of subcarrier frequency
located on the back porch of the composite video signal. This serves
as a color synchronizing signal to establish a frequency and phase
reference for the chroma signal. Color burst is 3.58 MHz for NTSC and
4.43 MHz for PAL.
 “Color temperature”: The color quality, expressed in degrees
Kelvin(K), of a light source. The higher the color temperature, the bluer
the light. The lower the temperature, the redder the light. Benchmark