Motorola MC70 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 determ ines its meaning.

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

BOOTP. A protocol for remote booting of diskless device s. Assigns an IP address to a machine and may sp ecify 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 bo otp server must ha ve a table of all devices, associated MAC addre sses and

IP addresses.

boot or boot-up. The pro cess 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 bound ary, eight adjacent bin ary digits ( 0 and 1) combined in a patter n to repre sent 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

CDMA. Code Division Multiple Access (CDMA) is a form of multiplexing and a method of multiple access that does

not divide up the chann el by time (as in TDMA), or frequency (as in FDMA), but instead encodes data with a special

code associated with each channel and uses the constructive interference properties of the special codes to perform

the multiplexing.

CDRH. Center for Devices and Radio logical Health. A federal agency responsible for regulating laser product safety.

This agency specifies various laser operation classes based on power output dur ing 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 un in ten tio nal dir ect hum a n ex po su re .

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: (“-”,

“$”, “:”, “/”, “,” and “+”).

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

symbol elements.