Datalogic Jet Manuel d'utilisateur télécharger pdf (Page 147)

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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.

One shot key

Pressing a one shot key actives the state. The state remains active until any other

key is pressed. If you hold down a one shot state key and you press another key the

state will remain active until you release the one-shot key.

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.

Radio Frequency.

RTC

Real Time Clock.

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Datalogic Jet Manuel d'utilisateur Page 147