Glossary - Philips SDV6121/12 User Manual

7 Glossary

A
Amplifier
A device, either a single stage or a large scale
circuit with multiple stages for creating gain,
i.e. it makes small signals larger.
Antenna
A device, such as a rod or wire, which picks
up a received radio frequency signal or
radiates a transmitted RF signal.
C
Coaxial
A single copper conductor, surrounded with
a layer of insulation, covered by a surrounding
copper shield and finally, an insulating jacket.
An unbalanced transmission line with constant
impedance. In audio, this type is commonly
used for low level, line signals terminated in
RCA connectors.
D
DVB (Digital Video Broadcasting)
DVB is a suite of internationally accepted
open standards for digital television.
F
FM (Frequency Modulation)
In radio broadcasting: a method of
modulation in which the frequency of the
carrier voltage is varied with the frequency of
the modulation voltage.
H
HDTV (High-Definition Television)
It is a digital television broadcasting system
with higher resolution than traditional
television systems (standard-definition TV,
or SDTV). HDTV is digitally broadcast;
the earliest implementations used analog
broadcasting, but today digital television
(DTV) signals are used, requiring less
bandwidth due to digital video compression.
U
UHF (Ultra high frequency)
In radio or TV broadcasting: it is the
frequency range of electromagnetic waves
which lies between 300 MHz and 3 GHz
(3000 MHz).
V
VHF (Very high frequency)
In radio or TV broadcasting: it is the
frequency range of electromagnetic waves
which lies between 30 MHz and 300 MHz.