User Manual Part 2

Lynx.GX Installation and Management
ISM
Industrial, Scientific and Medical. The designation for specific
bands for license-exempt use of radio devices by the FCC and
other regulatory agencies.
narrowband
Generally, narrowband describes telecommunication that carries
voice information in a narrow band of frequencies. More
specifically, a specific frequency range set aside by the U.S.
FCC for mobile or radio services, including paging systems, from
50 cps to 64 Kbps.
isotropic antenna
An antenna capable of radiating or receiving equally well in all
directions, and equally responsive to all polarization of electric
and/or magnetic fields.
NMS
Network Management System
isotropic radiator
An electronic device that converts energy from one form to
another, producing useful electromagnetic field output in all
directions with equal intensity and at 100% efficiency, in three-
dimensional space.
ohm
The standard unit of electrical resistance in the International
System of Units (SI). Ohms are also used, when multiplied by
imaginary numbers, to denote reactance in alternating-current
(AC) and radio-frequency (RF) applications.
ITE
Information Technology Equipment.
Ohm’s Law
Ohm's Law is the mathematical relationship among electric
current, resistance, and voltage.
kbit
Kilobit. A transmission rate of 1 kbit/s corresponds to 1,000 bits
per second.
oscillator
An electronic device used for the purpose of generating a signal.
Oscillators are found in computers, wireless receivers and
transmitters, and audio-frequency equipment.
kHz
The kilohertz, abbreviated kHz or KHz*, is a unit of alternating
current (AC) or electromagnetic (EM) wave frequency equal to
one thousand hertz (1,000 Hz).
parabolic antenna
An antenna consisting of a parabolic reflector and a source at or
near the focus. A microwave dish antenna is an example of a
parabolic antenna.
LED
Light-emitting diode. A device that emits visible light when an
electric current passes through it.
parallel
More than one event happening at a time.
link testing
The preferred way to evaluate a radio link's performance. It can
be performed from end-to-end or in link test mode (which tests
both directions of the radio path).
parallel processing
In computers, parallel processing is the processing of program
instructions by dividing them among multiple processors with the
objective of running a program in less time.
LNA
Low Noise Amplifier
parity
A technique of checking whether data has been lost or written
over when it has moved from one place in storage to another or
when transmitted between computers.
lobe, antenna
A part of the antenna radiation pattern between adjacent minima.
loopback
A test signal sent to a network destination that is returned as
received to the originator. The returned signal may help
diagnose a problem.
polarization
An expression of the orientation of the lines of electric flux in an
electromagnetic field. Polarization is important in wireless
communications systems. The physical orientation of a wireless
antenna corresponds to the polarization of the radio waves
received or transmitted by that antenna.
Mbps
Megabits per second
PPP
Point-to-Point Protocol. A protocol for communication between
two computers using a serial interface.
MHz
Megahertz.
A unit of alternating current (AC) or electromagnetic (EM) wave
frequency equal to one million hertz (1,000,000 Hz).
protocol
In information technology, the special set of rules that end points
in a telecommunication connection use when they communicate.
MIB
Management Information Base. A formal description of a set of
network objects that can be managed using the Simple Network
Management Protocol (SNMP) Management Information Base.
QAM
Quadrature amplitude modulation. QAM is a method of
combining two amplitude-modulated (AM) signals into a single
channel, thereby doubling the effective bandwidth. QAM is used
with pulse amplitude modulation (PAM) in digital systems,
especially in wireless applications.
modem
MOdulator DEModulator. A device that translates a stream of
digital data created by computer into the curious squeaking and
hissing sounds that can be transmitted across phone lines.
QPSK
Quadrature Phase Shift Keying. A digital frequency modulation
technique used for sending data over coaxial cable networks.
Since it's both easy to implement and fairly resistant to noise,
QPSK is used primarily for sending data from the cable
subscriber upstream to the Internet.
multiplexing
The combining of several signals in the same communications
channel, usually with the aim of increasing the amount of data
that can be transmitted.
mux
Multiplexer.
resistance
The opposition that a substance offers to the flow of electric
current.
mW
Milliwatt. One one-hundredth of one Watt
Acronyms / Glossary 105