User`s manual

6 Glossary
OCR Optical Character Recognition is the process by which a machine
reads characters printed in a special standardized font. Data are
read by a photoelectric optical scanner and recorded on magnetic
tape or disk. OCR–A and OCR–B are two widely used fonts.
off–line The non–printing operational state of the printer. When the
printer is off–line, communication between the printer and the
host computer is temporarily stopped and the message
“Off–line/Emulation” appears on the display. Non–printing
operations, such as printer configuration, paper loading, changing
the ribbon, etc., are done with the printer off–line.
on–line The printing state. When the printer is on–line, it is ready to
receive data and control commands from the host computer, and
prints the data immediately. “On–line” appears on the message
display and the control panel status lamps illuminate
continuously.
ON LINE A switch on the operator control panel that toggles the printer
between the on–line and off–line states.
parity (check) Parity checking is the addition of non–data bits to data, resulting
in the number of 1 bits being either always even or always odd.
Parity is used to detect transmission errors. Parity represents the
value in the check digit of the received or transmitted data.
parsing Parsing is the process of separating a programming statement into
basic units that can be translated into machine instructions. A
printer can recover from an erroneous code sequence by
performing as much of the function as possible or, parsing the
valid parameter from the invalid.
PCBA Printed Circuit Board Assembly.
pel See pixel.
PI Paper instruction: A signal from the host with the same timing
and polarity as the data lines.