User Guide

NETNode Operations Guide
Commercial in
Confidence
IP Mesh Systems
000-130
R1.8 2015-07-24
Commercial in
Confidence
Page 6-103
6. Appendix C-Glossary
6.1 Glossary
0-9
Means…
16QAM
16-state Quadrature Amplitude Modulation.
64QAM
64-state Quadrature Amplitude Modulation.
A
Means…
AC
Alternating Current. Current that is continually changing in
magnitude and at intervals in direction from a zero reference level.
A/V
Audio/Video.
AES
In cryptography, the Advanced Encryption Standard (AES) is
an encryption standard adopted by the U.S. government. The
standard comprises three block ciphers, AES-128, AES-192 and
AES-256, adopted from a larger collection originally published as
Rijndael. Each AES cipher has a 128-bit block, with keys of 128,
192 and 256 bits, respectively.
ASI
Asynchronous Serial Interface. A streaming data interface
which often carries an MPEG Transport Stream.
An ASI signal can carry one or multiple SD, HD or audio programs
that are already compressed, not like an uncompressed SD-SDI
(270Mbs) or HD-SDI (1.45Gbs). An ASI signal can carry differing
quantities of data but is always padded to operate at a fixed line
rate of 270 Mb/s.
Amplification
Increasing the strength (current, voltage or power) of a signal.
Amplitude
The level of an audio or other signal in voltage or current. The
magnitude of variation in a changing quantity from its zero value.
Amplitude Modulation
Modulation in which the amplitude of the carrier wave is varied
above and below its usual value in accordance with the
intelligence of the signal being transmitted. Also called AM.
Analogue
Analog transmission is a transmission method of conveying
voice, data, image, signal or video information with a continuous
signal which varies in amplitude, phase, or some other property in
proportion to that of a variable.