Motorola DS3478 C

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.

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.

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

The client sends a boo tp req uest a s a broad cast to th e boo tp server po rt (67) and th e bootp server respon ds using the

bootp client port (68). The bootp server must have a tabl e of all devices, associated MAC addresses an d IP addresses.

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 ar e 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.

C

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 pu pil. There are no special operating procedures for this class.

CDRH Class 2. No additional software mechanisms are nee ded to conform to this limit. Laser operatio n in this class poses

no danger for unintentional direct human exposure.

Character. A pattern of bars and spaces which either directly represents data or indi cates 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 re su ltin g num be r ma tc he s the enc od e d check digit. Check digits are required for UPC but are

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

decoded.

Codabar. A discrete self-checking code with a char acter set consisting of digits 0 to 9 and six addition al characters: ( - $ : /

, +).

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

symbol elements.

Code 3 of 9 (Code 39). A versatile and widely used alphanumeric bar code symbology with a set of 43 character types,

including all uppe rcase letters, numerals from 0 to 9 and 7 sp ecial characters ( - . / + % $ and space ). The code na me is

derived from th e fa ct tha t 3 of 9 elem en ts represent i ng a character are wide, while the remaining 6 are narrow.

Code 93. An industrial symbology compatible with Code 39 but offering a full character ASCII set and a higher coding

density than Code 39.