Matrix Orbital VK202-25 Legacy - Manual (Page 48)

Backlight A backlit display is illuminated from behind to provide
nighttime and improved daytime readability.
Binary Number The (data and signaling) bit transmission rate of an RS-
232 device.
Bit A number written using binary notation which only
uses zeros and ones.
Bitmap A representation, consisting of rows and columns of
dots, of a graphics image in computer memory. The
value of each dot (whether it is filled in or not) is stored
in one or more bits of data.
Byte A grouping of eight binary bits
CCFL Cold Cathode Fluorescent Lamp. A high brightness
backlighting source consists of a fluorescent tube pow-
ered by a high voltage A.C. source.
Configuration The way a system is set up, or the assortment of com-
ponents that make up the system. Configuration can
refer to either hardware or software, or the combina-
tion of both.
Contrast The ratio of luminance between the light state of the
display to the dark state of the display.
Controller The micro-controller or PC used to control the Matrix
Orbital display unit.
DB-9 The designation of a connector used in the RS-232 in-
terface: 9 pin connector
Firmware Software (programs or data) that has been written onto
read-only memory (ROM). Firmware is a combina-
tion of software and hardware. ROMs, PROMs and
EPROMs and flash EEPROMs that have data or pro-
grams recorded on them are firmware.
Font A design for a set of characters. A font is the combina-
tion of typeface and other qualities, such as size, pitch,
and spacing.
Font Metric A definition of where font is to be placed, such as mar-
gins and spacing between characters and lines.
Hexadecimal Refers to the base-16 number system, which consists
of 16 unique symbols: the numbers 0 to 9 and the let-
ters A to F. For example, the decimal number 15 is
represented as F in the hexadecimal numbering sys-
tem. The hexadecimal system is useful because it can
represent every byte (8 bits) as two consecutive hex-
adecimal digits. It is easier for humans to read hex-
adecimal numbers than binary numbers.
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