Glossary
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EasyCoder 4420 and 4440 Bar Code Label Printer User’s Manual
pitch
(1) The number of characters printed in one horizontal inch determined
by the increment by which the printer platen moves. (2) Rotation of a bar
code symbol about an axis parallel to the direction of the bars.
point size
A unit of measure for font height; 72 points equals 1 inch as measured
from slightly above the top of the uppercase letters to slightly below the
bottom of the lowercase descenders.
Polling Mode D protocol
Polling Mode D is a protocol that allows devices and controllers to
exchange data in an “ask and receive” format. Use Polling Mode D to
connect multiple devices to a single multiport controller.
print speed
Measured in inches per second (ips), the rate at which media travels past
the printhead.
printhead
The mechanism inside the printer that prints. The printhead for the 4420
printer consists of 896 thermal elements. The printhead for the 4440
printer consists of 1792 thermal elements.
printhead elements
The parts of the printhead that print by placing a mark on the label when
heated. Each element on the 4420 printer is 0.005 inches square in area.
Each element on the 4440 printer is 0.0025 inches square in area. Each
element is switched on and off separately in order to react with the media
or thermal transfer ribbon to create a mark on the label.
ready
The state in which the printer is able to print; the normal operating state
of the printer.
Ready/Busy line
Pin 11/20 of the rear panel connector. Indicates whether the printer is
ready or not ready (busy).
RS-232
Widely recognized protocol standard for serial binary data interchange.
The standard covers the physical, electrical, and functional characteristics
of the interface.