Extron electronic 6400s - Manual (Page 66)

Reference Information, cont’d
Matrix 3200/6400 Series • Reference Information A-10
establishing the limit to which lines can be distinguished on a test pattern. A
larger resolution value means a broader frequency band of the video signal.
C) A measure of the greatest amount of detail that can be seen in an image.
Often incorrectly expressed as a number of pixels in a given line; more
correctly it is the bandwidth.
RGB – Red, Green, Blue – The basic components of the color television
system. They are also the primary colors of light, not to be confused with
Cyan, Magenta, and Yellow, the primary pigments. Also called the “Additive
Color Process”.
RGB Video – A form of color video signal (red, green, blue) distinctly different
from the composite color video used in standard television sets. RGB can be
displayed only on a color monitor that has a separate electron gun for each
of these primary colors. Some color television sets use only one gun. RGB
monitors are noted for their crisp, bright colors and high resolution.
RS-170A – EIA technical standard NTSC color TV.
RS-232 – An Electronic Industries Association (EIA) serial digital interface
standard specifying the electrical and mechanical characteristics of the
communication path between two devices using D-type connectors. This
standard is used for relatively short range communications and does not
specify balanced control lines.
RS-422 – An EIA serial digital interface standard which specifies the electrical
characteristics of balanced voltage digital interface circuits. This standard is
usable over longer distances than RS-232. Although originally designed for
use with 9-pin and 37-pin, D-type connectors, it is often used with others,
including 25-pin D-types. It is also used as the serial port standard for
Macintosh computers. This signal governs the asynchronous transmission of
computer data at speeds of up to 920,000 bits per second.
SECAM – Sequential Couleur Avec Memoiré – Translated as “Sequential
Color with Memory”. A composite color transmission system that potentially
eliminates the need for both a color and hue control on the monitor. One of
the color difference signals is transmitted on one line and the second is
transmitted on the second line. Memory is required to obtain both color
difference signals for color decoding. This system is used in France, Africa,
Asia and many Eastern European countries.
Serial Port – An output on the computer that allows it to communicate with other
devices in a serial fashion – data bits flowing on a single pair of wires. The
serial port is most often used with RS-232 protocol.
SMPTE – Society of Motion Picture and Television Engineers – A global
organization, based in the United States, that sets standards for base-band
visual communications. This includes film as well as video standards.
SMPTE Pattern – The video test pattern made up of color, black, and white
bands used by television stations.
Software – The programs used to instruct a processor and its peripheral
equipment.
Switcher – Term often used to describe a special effects generator; a unit which
allows the operator to switch between video camera signals. Switchers are
often used in industrial applications to switch between video camera
monitoring certain areas for display on a monitor, or system of display
devices. These kinds of switchers do not have sync generators.
Sync – In video, a means of synchronizing signals with timing pulses to insure
that each step in a process occurs at exactly the right time. For example:
Horizontal Sync determines exactly when to begin each horizontal line
(sweep) of the electron beam. Vertical Sync determines when to bring the
electron beam to the top-left of the screen to start a new field. There are
many other types of sync in a video system. (Also called Sync Signal or
Sync Pulse.)