Microscan MS-3 User Manual page 234

Glossary of Terms
Scan Speed. The number of scans per second that a scanner projects from the spinning
mirror.
Scan Width (SW) is the width across the scan beam at a given distance from the scan-
ner 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 auxil-
iary 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-vol-
atile memory for power-on configuration.
Skew. Symbol (or scanner) rotation around the center of the skew axis which is per-
pendicular to the plane of the scan beam.
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 caus-
ing saturation and bad reads.
Supplemental. A character or data string that is appended to the main bar code symbol.
Symbol. A one or two dimensional decodable pattern that can be recognized and
decoded by a bar code scanner or 2D reader.
Symbology. A code type, such as Code 39 or Code 128, with special rules to define the
widths and positions of bars and spaces to represent specific numeric or alphanumeric
information.
Symbol Density. Symbol size as measured by the narrow bar width.
Symbol Height. (SH) Regardless of orientation, the measurement taken along the
length of a symbol's individual bars.
Symbol Length. (SL) Regardless of orientation, the measurement taken across the
symbol's bars from one end to the other, including the quiet zone.
Symbol Speed. (SS) the distance per second that a symbol moves in a dynamic appli-
cation.
Symbol Transitions. The transition of bars and spaces on a symbol, used to detect the
presence of a symbol on an object.
Tilt. Symbol (or scanner) rotation around the centerline of the scan beam.
Timeout. The termination of a read cycle or other routine by time.
Timeout Duration. The actual time that elapses during a read cycle or other timed
routine.
Tracking. Adjustment of the precision of analog-to-digital conversion.
Transmit. Send or convey signals or information from one device to another.
Transparent. Data that passed between the auxiliary port and the host with keyed data
echoed to the auxiliary port
Trigger. A signal, transition, or character string that initiates a read cycle.
Watchdog Timer. A security device that detects system crashes and attempts to reset
the scanner.
MS-3 Laser Scanner User's Manual
A-42