Setup guide

Glossary–2

character cell The invisible rectangular space occupied by a character, including

the white space around the character. The height of a cell is equal

to the current line spacing, and the width is equal to the current

character spacing. Used as a unit of spacing.

character proportion The ratio of character height to character width.

See also compressed and expanded.

character set A set of codes, each of which represents a printable character,

including symbols, punctuation, numbers, diacritical markings,

and alphabet characters. Each character is assigned a unique code

value.

character weight The degree of lightness and thickness of printed text. For

example: “Bold” refers to a heavy or thick character weight.

“Medium,” “normal,” or “book weight” refer to the character

weight used in this sentence.

checksum A stored or transmitted numerical value used to verify data

integrity.

command An instruction, such as a form feed command, sent from a

computer to the printer (sometimes called a control code or

non–printable character). Opposed to data, which is printed.

command delimiter An ASCII character used to begin a command string (same as

SFCC). Commonly used command delimiters are ESC (1B hex)

and SOH (01 hex).

command sequence Two or more bytes that instruct the printer to perform a special

function. The first character in the sequence is a special function

control character (SFCC), which alerts the printer that the string

is a command sequence.