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10
U
UHF (Ultra high frequen cy)
In radio or TV broadc asting: it is the fre quency
range of electromag netic waves which lies
between 300 MHz and 3 G Hz (3000 MHz).
V
VHF (Very high frequency)
In radio or TV broadc asting: it is the fre quency
range of electromag netic waves which lies
between 30 MHz and 30 0 MHz.
7 GlossaryA
Amplier
A device, either a single s tage or a large scale
circuit with multipl e stages for creating ga in,
i.e. it makes small signal s larger.
Antenna
A device, such as a rod or wire , which picks up
a received radio frequ ency signal or radiate s a
transmitted RF s ignal.
C
Coaxial
A single copper conductor, sur rounded with
a layer of insulation, covered by a su rrounding
coppershieldandnally,aninsu latingjacket.
An unbalanced transmi ssion line with const ant
impedance. In audio, thi s type is commonly
used for low level, line signals t erminated in
RCA connectors.
D
DVB (Digital Video Broadcas ting)
DVB is a suite of internation ally accepted open
standards for digit al television.
H
HDTV (High-Denitio n Television)
It is a digital televisio n broadcasting sys tem
with higher resolut ion than traditiona l
televisionsystems(st andard-deniti onTV,
or SDTV). HDTV is digit ally broadcast;
the earliest imple mentations used analog
broadcasting, bu t today digital televisio n
(DTV) signals are use d, requiring less
bandwidth due to digit al video compression .
EN