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AN-30e
user manual
70-00035-01
Proprietary Redline Communications © 2004
November
16,
2004
Page 100 of 103
8.6
Glossary Of Terms
Table 55: Glossary of Terms
Term
Definition
Antenna Gain The measure of antenna performance relative to a theoretical antenna
called an isotropic antenna.
ARQ
Automatic Repeat Request. This is the protocol used over the air for
error correction.
ATPC
Automatic Transmission Power Control. The link master-end system
automatically adjusts the Tx level of subscriber to match a target RSSI
value.
Beamwidth
The angle of signal coverage provided by an antenna.
BFW
Broadband Fixed Wireless
Bps
Bits Per Second
A unit of measurement for the rate at which data is transmitted.
BPSK
Binary Phase Shift Keying.
Channel
A communications path wide enough to permit a single RF
transmission.
dB
A ratio expressed in decibels.
dBi
A ratio, measured in decibels, of the effective gain of an antenna
compared to an isotropic antenna.
dBm
Decibels above a milliwatt
DFS
DFS can detect interference from other devices using the same
frequency and automatically take a pre-selected action such as
disable transmission or relocate transmission to alternative frequency.
DHCP
Dynamic Host Configuration Protocol. A DHCP server automatically
issues IP addresses within a specified range to devices on a network.
Directional
Antenna
An antenna that concentrates transmission power into one direction.
Encryption
For the purposes of privacy, the transformation of data into an
unreadable format until reformatted with a decryption key.
Ethernet
A LAN architecture using a bus or star topology
FD
Full Duplex. Refers to the transmission of data in two directions
simultaneously (i.e. a telephone)
FWA
Fixed Wireless Access
Gain
The ratio of the output amplitude of a signal to the input amplitude of a
signal. Typically expressed in decibels (dB).
Gateway
A network point that acts as an entrance to another network.
GHz
Gigahertz. 1,000,000,000 Hz, or 1,000 MHz
GUI
Graphical User Interface
IF Intermediate
Frequency.
IP
Internet Protocol. See TCP/IP.
Isotropic
A theoretic construct of an antenna that radiates its signal 360
degrees both vertically and horizontally—a perfect sphere. Generally
used as a reference.