User Guide

NETNode Operations Guide
Commercial in
Confidence
IP Mesh Systems
000-130
R1.8 2015-07-24
Commercial in
Confidence
Page 6-108
N
Means…
NMEA 0183
NMEA 0183 is a combined electrical and data specification for
communication between marine electronic devices such as echo
sounder, sonar, anemometer, gyrocompass, autopilot, GPS
receivers and many other types of instruments. It has been
specified by, and is controlled by, the U.S.-based National Marine
Electronics Association.
NTSC
National Television Systems Committee.
Noise
Random pulses of electromagnetic energy generated by lightening
or electrical equipment.
O
Means…
Omni directional
antenna
An antenna radiation pattern that shows the same radiation in all
horizontal directions.
Oscillation
A periodic, repetitive movement or set of values (voltage, current,
velocity).
P
Means…
PAL
Phase Alternate Line.
PIR
Passive Infra-Red sensor (PIR sensor) is an electronic device
that measures infrared (IR) light radiating from objects in its field
of view.
PTZ
Pan, Tilt and Zoom – PTZ is a usual description of controllable
cameras.
Propagation
A phenomenon by which a wave moves from one point to a
second point; the movement of electromagnetic waves through
space or along a transmission line.
Q
Means…
QPSK
Quadrature Phase Shift Keying.
R
Means…
RF
Radio Frequency.