Intermec Janus 2020 User Manual page 545

G
Glossary
SEL
Select character. The character that requests permission for the controller to
send data to the polled device.
serial communications
With serial communications, data is transmitted one bit at a time over a single
line from one computer to another. Often serial communications link host
computers to terminals and PCs to printers.
serial communications parameters
Parameters that control serial communications from one computer to another,
such as baud rate and parity.
server
The computer that contains the drives, directories, files, and programs you
want to access. See also client.
SOM
Start of Message character. The first character in messages sent to or received
from the host.
SOP
Start of Program Block character. Sent by the host at the beginning of a block of
IRL program statements.
spotting beam
An aiming feature of a laser scanner. A small beam of light briefly shines on
the object being scanned, allowing the operator to position the scanner
correctly for a good read.
SRAM drive
Static RAM. See RAM drive.
SRAM PC card
A type of memory PC card that provides additional disk storage space, not
more executable conventional memory, on the reader. An SRAM card has a
lithium battery to back up data for the life of the battery.
stop bits
A bit that signals the end of a character. One of the serial communications
parameters.
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