Appendices
MS-860 Industrial Raster Reader User’s Manual
A-35
Scan Speed. The number of laser scan lines per second that a reader projects from the
spinning mirror.
Scan Width (SW) is the width across the scan beam at a given distance from the
reader 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 reader 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 reader) rotation around the center of the skew axis which is perpen-
dicular to the plane of the scan beam.
Secondary Reader. A reader linked to the master or preceding reader 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 reader 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 Transitions. The transition of bars and spaces on a symbol, used to detect the
presence of a symbol on an object.
Tilt. Symbol (or reader) 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 reader.
Watchdog Reset. A reset that is forced whenever the software locks up.
Wild Card. User-defined character entered into a master symbol to permit matches
with variable characters.
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