Motorola 9500 User's Guide download pdf (Page 240)

Glossary - 2 MC9500-K Mobile Computer User Guide

Bar Width. Thickness of a bar measured from the edge closest to the symbol start character to the trailing edge of the same

bar.

BIOS. Basic Input Output System. A collection of ROM-based code with a standard API used to interface with standard PC

hardware.

Bit. Binary digit. One bit is the basic unit of binary information. Generally, eight consecutive bits compose one byte of data.

The pattern of 0 and 1 values within the byte determines its meaning.

Bits per Second (bps). Bits transmitted or received.

BOOTP. A protocol for remote booting of diskless devices. Assigns an IP address to a machine and may specify a boot file.

The client sends a bootp request as a broadcast to the bootp server port (67) and the bootp server responds using the

bootp client port (68). The bootp server must have a table of all devices, associated MAC addresses and IP addresses.

boot or boot-up. The process a computer goes through when it starts. During boot-up, the computer can run self-diagnostic

tests and configure hardware and software.

bps. See Bits Per Second.

Byte. On an addressable boundary, eight adjacent binary digits (0 and 1) combined in a pattern to represent a specific

character or numeric value. Bits are numbered from the right, 0 through 7, with bit 0 the low-order bit. One byte in

memory is used to store one ASCII character.

CDRH. Center for Devices and Radiological Health. A federal agency responsible for regulating laser product safety. This

agency specifies various laser operation classes based on power output during operation.

CDRH Class 1. This is the lowest power CDRH laser classification. This class is considered intrinsically safe, even if all laser

output were directed into the eye's pupil. There are no special operating procedures for this class.

CDRH Class 2. No additional software mechanisms are needed to conform to this limit. Laser operation in this class poses

no danger for unintentional direct human exposure.

Character. A pattern of bars and spaces which either directly represents data or indicates a control function, such as a

number, letter, punctuation mark, or communications control contained in a message.

Character Set. Those characters available for encoding in a particular bar code symbology.

Check Digit. A digit used to verify a correct symbol decode. The scanner inserts the decoded data into an arithmetic formula

and checks that the resulting number matches the encoded check digit. Check digits are required for UPC but are

optional for other symbologies. Using check digits decreases the chance of substitution errors when a symbol is

decoded.

Codabar. A discrete self-checking code with a character set consisting of digits 0 to 9 and six additional characters: (“-”, “$”,

“:”, “/”, “,”, “+”).

Code 128. A high density symbology which allows the controller to encode all 128 ASCII characters without adding extra

symbol elements.

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Motorola 9500 User's Guide Page 240