Philips SDV1121T/27 Satellite TV System User Manual


  Open as PDF
of 10
 
8
(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.
7 Glossary
A
Antenna
A device, such as a rod or wire, which picks up
a received radio frequency signal or radiates a
transmitted RF signal.
ATSC (Advanced Television Systems
Committee)
The Advanced Television Systems Committee,
Inc.,isaninternational,non-protorganization
developing voluntary standards for digital
television.Thehighdenitiontelevision
standardsdenedbytheATSCproducewide
screen 16:9 images up to 1920x1080 pixels
in size -- more than six times the display
resolution of the earlier standard. However,
many different image sizes are also supported,
sothatuptosixstandard-denition“virtual
channels” can be broadcast on a single 6 MHz
TV channel.
C
Coaxial
A single copper conductor, surrounded with
a layer of insulation, covered by a surrounding
coppershieldandnally,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.
H
HDTV (High-Denition Television)
It is a digital television broadcasting system
with higher resolution than traditional
televisionsystems(standard-denitionTV,
or SDTV). HDTV is digitally broadcast;
the earliest implementations used analog
broadcasting, but today digital television
EN
 previous next