Printronix SL4M User Manual page 242

Appendix E
Parity (check)
PCBA
Port
Protocol
RAM
Reflective Mark Sensing
Resolution
RFID Encoder
Roll Media
Sensed Distance
Slew
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Parity checking is the addition of a non-data bit 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 value in the
check digit of the received or transmitted data.
Printed Circuit Board Assembly. A PCB with
components (ICs, resistors, capacitors, etc.)
installed.
A data channel used for receiving data from or
transmitting data to one or more external devices.
The rules and conventions that govern
communication between a printer and a host
computer. A protocol includes codes for printing text
and graphics and codes instructing the printer to
perform special operations.
Random-Access Memory. Also called "main
memory" or "working memory." It is the active
memory of the printer into which programs are
loaded. RAM is saved to volatile memory because
data in RAM is lost when power is turned off or
interrupted.
Use of the media sensor to transmit and receive
infrared light off the underside of media to detect
horizontal black marks used for determining the Top-
of-Form position on labels or for indicating a Paper
Out condition.
A measure expressing the number of component
units in a given range used to create an image; in
printing, expressed as the number of dots per inch
(dpi) horizontally and vertically.
The RFID (Radio Frequency Identification) encoder
programs smart labels (tags with embedded inlays).
Media supplied in a roll format, on a 3-inch cardboard
core.
Gap/Mark Sensor = Gap: The Sensed Distance
value is the physical length of one label plus the
length of one gap.
Gap/Mark Sensor = Mark: The Sensed Distance
value is the physical distance from the leading edge
of one black mark to the leading edge of the next.
Vertical paper movement.