Datalogic Kyman\, Руководство пользователя

Страница: 111 / 117

EDGE
Enhanced Data rates for GSM Evolution, EDGE is a wireless packet-based
communication service based on GSM. Its data transfer can reach a theoretical
maximum of 473.6 Kbps.
EEPROM
Electrically Erasable Programmable Read-Only Memory. An on-board non-volatile
memory chip.
Flash Disk
Non-volatile memory for storing application and configuration files.
GPRS
General Packet Radio Service. GPRS is a wireless packet-based communication
service based on GSM. Its data transfer is rated between 56 Kbps to 114 Kbps. It
makes very efficient use of available radio spectrum, and users pay only for the
volume of data sent and received.
GSM
Global System for Mobile communication. It is a standard for digital cellular
communications, currently used in the 900 MHz and 1800 MHz bands.
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.
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).
RAM
Random Access Memory. Data in RAM can be accessed in random order, and
quickly written and read.
RF
Radio Frequency
93