emulation. The ability of a printer to emulate, or
function like a different type of printer. See also
compatibility and protocol.
en. A unit of measure in typesetting equal to half the
width of an em.
enable. To activate, make “true” (1), or set to ON.
escape sequence. A command sequence in which the
first byte is always the ASCII ESC character. See also
command sequence, SSCC, and SFCC sequence.
ETX. End of Text.
EVFU. Abbreviation for Electronic Vertical Format
Unit. Relates to the ability to slew (skip quickly as a
specified number of lines).
expanded. Refers to a typeface with a font width
larger than normal. Character height is not changed.
F
family (or type). A set of all variations and sizes of a
type style.
FF. Form Feed.
FIFO. First In, First Out.
fixed-pitch fonts. Same as font, monospaced.
FM Header. Format Header. Command strings used to
switch between SCS and IPDS.
font. The complete set of a given size of type,
including characters, symbols, figures, punctuation
marks, ligatures, signs, and accents. To fully describe a
font, you must specify seven characteristics:
1. typeface (Courier, Helvetica, Swiss, and so forth)
2. spacing (proportional or monospaced)
3. type size (12 point, 14 point, and so forth)
4. scale factor (character height/width ratio)
5. type style (Roman or italic)
6. character weight (bold, normal, and so forth)
7. character proportion (normal, compressed,
expanded).
font,
monospaced. Also called fixed-pitch font and
mono-font. Every character, regardless or horizontal
size, occupies the same amount of font pattern space.
All monospaced fonts use specific pitch size settings.
Monospaced fonts are sometimes used when strict
character alignment is desired (tables, charts,
spreadsheets, and so forth).
font name. See typeface.
font pattern. A font pattern is the matrix of pixels
which represents a character, symbol, or image.
font, proportional. A font in which the width of a
character cell varies with the width of the character. For
example, “i” takes less space to print than “m”. Using
proportional fonts generally increases the readabilty of
printed documents, giving text a typeset appearance.
font weight. The thickness of the lines making up a
character. For example, “bold” and “light” are different
font weights.
font width. The measurement of the width of a
character cell in dots.
G
gateway. A hardware device that translates data
between two incompatible networks.
gateway address. The IP address of a gateway.
H
hammer. The hammer spring with a hammer tip
mounted onto it.
hammer spring. The flat piece of metal, made of
spring steel, which supports and pushes the hammer
tip.
hammer tip. The small, round point, located near the
end of the hammer spring, which strikes the ribbon
and leaves a dot on the paper.
hex codes. Based on a numeral system with a radix of
16.
host (computer). The computer that stores, processes,
and sends data to be printed, which communicates
directly with the printer. The term “host” specifies the
controlling computer, since modern printers are
themselves microprocessor-controlled computer
systems.
HS. Abbreviation for high speed font. Also referred to
as draft.
HT. Horizontal Tab.
Hz. Hertz. Cycles per second, a measure of frequency.
I
IGP. Intelligent Graphics Processor. An optional
emulation that converts graphics commands received
from the host computer to binary plot data that is
usable by the printer.
initialization. A series of processes and self-tests to set
power-up default conditions and parameters.
Glossary 289
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