AirData 150 S2 USB User Manual
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ISM Band: Industrial, Scientific and Medical Band is the 2.4 – 2.483 GHz frequency band.
LED: Light Emitting Diode, an electronic device that lights up when electricity is passed
through it.
MAC Address: Media Access Control Address is a unique HEX number assigned by the
manufacturer to any Ethernet networking device.
Node: A network junction or connection point, typically an Access Point / Router.
OFDM: Orthogonal Frequency Division Multiplexing is a modulation scheme that works by
dividing the communication channel into a number of sub-channels that are spaced apart at
precise frequencies. This spacing provides the “orthogonality” in this technique which allows
the transmitter and the receiver to communicate using a “dedicated” sub-channel. The
benefits of OFDM are high spectral efficiency and resiliency to interference.
Open Authentication: Open System authentication is a null authentication algorithm. Any
station that requests authentication receives it. If the key that the station is using is not
correct, then further communication is not possible
Packet: A set of data routed between an origin and a destination in a network.
Preamble Type: A preamble is a signal used in network communications to synchronize the
transmission timing between two or more systems.
RADIUS: Remote Authentication Dial-In User Service is an authentication and accounting
system used by many Internet Service Providers (ISPs). When you dial in to the ISP you
must enter your username and password. This information is passed to a RADIUS server,
which checks that the information is correct, and then authorizes access to the ISP system.
RTS: Request To Send is a signal sent from the transmitting station to the receiving station
requesting permission to transmit.
Shared Key Authentication: When Shared Key authentication is enabled, the Access Point /
Router sends a packet to the client. The client uses a secret key in order to encode the
packet and retransmits the encoded information back to the Access Point / Router. If the
packet is correctly encoded then the client is authenticated.
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