Appendix O Glossary Of Terms - Microscan MS-3 Manual Book

Chapter A
Appendix O — Glossary of Terms
Active On (I ). An optoisolated input that's logically "on" when current flows through
ON
the connection points.
Active Off (I ). An optoisolated input that's logically "on" when no current flows
OFF
through the connection points.
Analog Gain Adjustment (AGC). Adjustment to signal strength that seeks to main-
tain a constant level regardless of the range of the symbol.
Application Record. A variation of UCC/EAN-128 which adds an application identifier
to symbol data, including user-definable separators, brackets, and padding.
Autocalibration. A routine that cycles through various optical settings and selects the
combination that produce the best read rate.
Autodiscriminate. The ability to decode several different symbologies without
changing configuration.
Auto Range. Outward focus of the scanner until an object is sensed by signal strength.
The scanner then begins searching for a decodable symbol.
Auxiliary Port. Provides RS232 connections to an auxiliary terminal or device for
remote viewing, for the transfer of data to and from the host, and under certain con-
ditions as a configuration port.
Bar Code. A symbol.
Bar Code Density. Symbol size as measured by the narrow bar width.
Baud Rate. The number of discrete signal events per second. Bits per second.
Capture. The act of grabbing or recording a frame by a sensor. A frame or succession
of frames that are captured.
Check Digit. A Modulus 43 or Modulus 10 digit that is added to the symbol message
for additional data integrity.
Configuration. A setup or process of changing a scanner's settings to conform to a
specific application. A physical arrangement of components.
Concentrator. Intermediary device that relays data from scanners to a host and
commands from the host to the scanner or other devices.
Connector. Physical device (plug or socket) on a device or cable to provide in/out
connectivity for various circuits and pins.
Counter. Memory space provided to keep track of scanner events.
Daisy Chain. Linkage of master and slave scanners to allow data to be relayed up to
the host via auxiliary port connections.
Decode. A good read. The successful scanning and decoding of the information
encoded in symbol.
Default. Restore ROM or Flash settings, initialize serial commands and reset all counters.
MS-3 Laser Scanner User's Manual
Appendices
A-29