Datalogic Memor User Manual page 109

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.
IEEE 802.11
A set of standards carrying out wireless local area network (WLAN) computer
communication in the 2.4, 3.6 and 5 GHz frequency bands. They are created
and maintained by the IEEE LAN/MAN Standards Committee.
Liquid Crystal Display (LCD)
A display that uses liquid crystal sealed between two glass plates. The crystals
are excited by precise electrical charges, causing them to reflect light outside
according to their bias. They use little electricity and react relatively quickly.
They require external light to reflect their information to the user.
Light Emitting Diode (LED)
A low power electronic light source commonly used as an indicator light. It uses
less power than an incandescent light bulb but more than a Liquid Crystal
Display (LCD).
Null modem cable
RS-232 serial cable where the transmit and receive lines are crosslinked. In
some cables there are also handshake lines crosslinked. In many situations a
straight through serial cable is used, together with a null modem adapter. The
adapter contains the necessary crosslinks between the signals.
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