Datalogic ELF User Manual page 152

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.
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).
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.
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.
Pairing
A Bluetooth pairing occurs when two Bluetooth devices agree to communicate with
each other and establish a connection.
Piconet
A piconet is a Bluetooth PAN that links up to eight devices. Each piconet is controlled
by one master device, and up to seven slave devices at any one time. Any device
may be a member of more than one piconet, changing its membership as a user
moves from one area to another.
RAM
Random Access memory. Data in RAM can be accessed in random order, and
quickly written and read.
RF
Radio Frequency.
RTC
Real Time Clock.
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