Wasp Bar Code WLS 8400 FZ 用户手册

GL-3

Thickness of a bar measured from the edge closest to 
the symbol start character to the trailing edge of the 
same bar (see 

A measure of the data flow or number of signaling 
events occurring per second. When one bit is the 
standard "event," this is a measure of bits per second 
(bps). For example, a baud rate of 50 means 
transmission of 50 bits of data per second.

Denotes that a machine-readable symbol can be read 
successfully in two directions – either backwards or 
forwards. Also identifies a scanner that can operate or 
a bar code that can be read independent of scanning 
direction.

Denotes a numbering system to base 2 in which 
numbers are expressed as combinations of the digits 
0 and 1 with positional weighting based on powers of 
2. In computing, these can be represented electrically 
by 'off' and 'on' respectively or in machine-readable 
symbols by narrow and wide elements or by the 
absence or presence of a bar module.

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.

A sequential series of bits comprising one character 
and handled as one unit. Usually encoded in the 
ASCII format, a byte usually consists of eight bits and 
represents one alphabetic or special character, two 
decimal digits or eight binary bits.

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.

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.