Microscan MS-4X Instrukcja Użytkownika Pobierz pdf (Strona 300)

Appendix Q

A-44 MS-880 Industrial Long Range Scanner User’s Manual

Appendices

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 a bar code label.

Default. Restores ROM or Flash settings, initializes serial commands and resets all

counters.

Delimited. A command or field that is bracketed by pre-defined characters.

Decode Rate. The number of good reads per second decoded by the scanner.

Depth of Field. The distance between the minimum and maximum range in which a

scanner can read bar code labels.

Discrete I/O. Inputs and outputs characterized by discrete signal transitions from one

voltage level to another so that digital switching can occur.

EPROM. Erasable, programmable, read only memory.

Embedded Memory. Onboard memory device such as EPROM or flash.

End of Read Cycle. The time or condition at which the scanner stops expecting label

information to decode.

External Edge. Allows a read cycle to be initiated by a trigger signal from an object

detector when it detects the appearance of an object (rising edge). The read cycle

ends with a good read, a timeout, or a new trigger.

External Level. Allows a read cycle to be initiated by a trigger signal from an object

detector. The read cycle ends when the object moves out of the detector’s range.

Falling Edge. A change of state (to inactive) associated with a level trigger in which

the scanner stops searching for bar code symbols. (See Rising Edge.)

Fixed Code Length. Increases data integrity by ensuring that only one label length

will be accepted.

Flash Memory. Memory that can be changed by downloading new code.

Focal Length. The distance measured from the scanner to the center of the depth of

field, or

focal point.

Focus. The point at which the tip of the scan beam is at its narrowest.

Frame. The total area scanned in an image sensor.

Full Duplex. Auxiliary port data is sent directly to the host but not displayed on the

auxiliary port screen.

Gain. Optimal signal strength.

Good Read. A decode. The successful scanning and decoding of the information

encoded in a bar code label.

Half Duplex. Auxiliary port data is sent directly to the host and displayed on the aux-

iliary port screen.

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