Microscan MS-615 User Manual page 95

Glossary of Terms
Pitch. Label (or scanner) rotation around the center a line perpendicular to
the label's bars.
Point-to-Point. A protocol consisting of a single communications event,
typically used to connect a bar code reader to a terminal or host computer.
Port. Logical circuit for data entry and exit. (One or more ports may be
included within a single connector.)
Protocol. The rules for communication between devices, providing a
means to control the orderly flow of information between linked devices.
Quiet Zones. Specified "clear" (nonprinted) areas immediately before and
after the bar code symbol. The area is usually white (for black and white bar
code) and at least 10 times the width of the narrowest bar, as measured in
thousands of an inch. The zones can be other than white as long as their
densities remains consistent and they have the required contrast relative to
the bars.
RAM. Random Access Memory. Memory that is lost after power is recycled
to the unit.
Read Cycle. A programmed period of time or condition during which the
scanner will accept bar code label input.
Read Range. The distances in which a label can be reliably read, as mea-
sured from the front of the scanner. See "Depth of Field."
Relay Driver. A TTL signal sent by the scanner. The output is determined
by the relay driver selection during configuration.
ROM. Read Only Memory. Memory that cannot be changed.
Scanner. A scanning device that is comprised of a scan head and a
decoder integrated in one package.
Scan Rate. Number of scans per second that the scanner projects.
Scan Width. That portion of the scan line in which a label can be read.
Serial Commands. On-line data strings (including configuration and opera-
tions) from a host or other terminal to the scanner, that are always preceded
by a < left angle bracket symbol and followed by a > right angle bracket sym-
bol.
Serial Configuration (Host Configuration). Serial command specifically
for changing configuration and distinguished from operational command by
the fact that they modify the non-volatile for power up configuration. Most of
these commands begin with the upper case K character immediately follow-
ing the left angle bracket symbol, as in <Kg3>.
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MS-610 Scanner User's Manual