Microscan MS-3 Manual Book page 201

Chapter A Appendices
Raster. Multiple, stacked scans produced by a separate oscillating mirror or by a
spinning mirror with varying facet angles.
Read Cycle. A programmed period of time or condition during which the scanner will
accept symbol input.
Reader. (1) Traditionally, a bar code device that can read but not decode symbols. (2)
Currently, a device that reads and decodes 2D matrix codes.
Read Range. The distances in which a symbol can be reliably read, as measured
from the front of the scanner. See "Depth of Field."
Reed-Solomon Error Correction Code. A linear, error correcting block code, suited
to the correction of character errors which could be, in bar or matrix codes, the oblit-
eration or removal of part of the symbol.
Read Range. The distances in which a symbol can be reliably read, as measured
from the front of the scanner. See "Depth of Field."
Relay. An electrical switch that allows a low power to control a higher one.
Reset. Sets all counters to zero.
Rising Edge. A change of state (to active) that initiates (and in some cases ends) a
read cycle with a new trigger, an edge trigger, or the leading edge of a level trigger.
(See Falling Edge.)
ROM. (Read Only Memory) Memory that cannot be changed.
Scanner. A scanning device that is comprised of a scan head and a decoder inte-
grated in one package.
Scan Rate (SR) The number of decodes per second that a given scanner is capable of
casting.
Scan Width (SW) is the width across the scan beam at a given distance from the
scanner in which a symbol can be read.
Send. Transmit data from one device to another.
Separator. A character that separates data fields.
Serial Commands. Online data strings such as <D> or <P> sent from a host or aux-
iliary terminal to a scanner or other device.
Serial Configuration (Host Configuration). Serial commands that change configura-
tion; distinguished from operational command by the fact that they can modify non-
volatile memory for power-on configuration.
Skew. Symbol (or scanner) rotation around the center of the skew axis.
Slave Scanner. A scanner linked to the master or preceding scanner in a daisy chain
which relays symbol data to the host. See "Daisy Chain."
Specular Reflection. The direct, mirror-like reflection of light back to the source
causing saturation and bad reads.
Supplemental. A character or data string that is appended to the main bar code
symbol.
MS-3 Laser Scanner User's Manual
A-33