Datalogic Jet DH60, Руководство пользователя

Страница: 109 / 114

101
Decode
To recognize a bar code symbology (e.g., Codabar, Code 128, Code 3 of 9,
UPC/EAN, etc.) and convert the content of the bar code scanned from a visual
pattern into electronic data.
Depth of Field (DOF)
The portion of a scene that appears acceptably sharp in the image. Although a lens
can precisely focus at only one distance, the decrease in sharpness is gradual on
each side of the focused distance, so that within the DOF, the unsharpness is
imperceptible under normal viewing conditions.
EEPROM
Electrically Erasable Programmable Read-Only memory. An on-board non-volatile
memory chip.
Ethernet
The standard local area network (LAN) access method. A reference to "LAN," "LAN
connection" or "network card" automatically implies Ethernet. Defined by the IEEE as
the 802.3 standard, Ethernet is used to connect computers in a company or home
network as well as to connect a single computer to a cable modem or DSL modem
for Internet access.
Firmware
Firmware is a software program or set of instructions programmed on a hardware
device. It provides the necessary instructions for how the device communicates with
the other computer hardware. Firmware is typically stored in the flash ROM of a
hardware device. While ROM is "read-only memory," flash ROM can be erased and
rewritten because it is actually a type of flash memory.
Flash Disk
Non-volatile memory for storing application and configuration files.
Host
A computer that serves other mobile computers in a network, providing services such
as network control, database access, special programs, supervisory programs, or
programming languages.