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memory
The printer, like a computer, has a memory. When you print a file from a
computer, the contents of the file are transferred quickly from the
computer’s memory to the printer’s memory. The printer then prints
information from its
own
memory at a much slower rate. This way of
printing frees the computer to do other work while the printer is still
working. The printer memory is sometimes called
the
buffer.
micro-adjustment
A feature that adjusts the paper loading and tear-off positions.
number systems
Three number systems are commonly used with printers:
decimal
is base 10 and uses the digits 0, 1, 2,
3, 4, 5, 6, 7, 8,
and
9.
(This is the most familiar system.)
hexadecimal
(hex) is base
16
and
uses the digits 0, 1, 2, 3, 4, 5, 6, 7, 8,
9,
A, B, C, D, E, and
F. This is frequently used by programmers. Any
decimal number between 0 and 255 can be expressed by a two-digit
hex
number.
binary
is base 2 and uses only the digits 0 and
1.
All information in
computer systems is handled in binary form to represent electrical
signals that are on or off. A binary digit is often called a bit; any
decimal number between 0 and
255
can be expressed by an eight-bit
binary number.
on line
When
the
printer is on line, it can communicate with the computer
connected to it,
paper-out sensor
A small switch behind the platen that sends a signal when it is not in
contact with paper, causing the
PAPER OUT
light to go on.
paper tension unit
The part of the printer that fits on top of the platen to ensure proper
paper feed tension.
parallel interface
See interface.
Glossary
GL-5