Glossary - Philips SDV7120/12 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.
F
Female connector
A female connector is a connector attached
to a wire, cable, or piece of hardware, having
one or more recessed holes with electrical
terminals inside, and constructed in such a
way that a plug with exposed conductors
(male connector ) can be inserted snugly into
it to ensure a reliable physical and electrical
connection.
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.
M
Male connector
A male connector is a connector attached
to a wire, cable, or piece of hardware, having
one or more exposed, unshielded electrical
terminals, and constructed in such a way that
it can be inserted snugly into a receptacle
(female connector) to ensure a reliable
physical and electrical connection .
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.
EN
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