Set Up Box Manufacturer in Singapore

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Set Up Box Manufacturer in Singapore
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A set-top box or set-top unit generally
abbreviated as STB and STU is an information
appliance device which contains a TV-Tuner input
and displays output in a Television Set and an
additional source which is externally connected
with signal turning the source signal into
content that can then be displayed on the
television screen or other display devices.
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They are used in Satellite Television, Cable
Television, Over-the-air-television systems and
other uses. The signal source might be an
Ethernet cable, a satellite dish, broadband over
power lines (BPL), a coaxial cable (see cable
television), a telephone line (which includes DSL
connections) or even an ordinary VHF or UHF
antenna.
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The content in this context could mean any or all
of the videos, audios, Internet web pages,
interactive video games or other possibilities.
The use of set-top boxes of several formats has
never completely disappeared because the
satellite and microwave-based services require
specific external receiver hardware and set-top
boxes can also enhance source signal quality.
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Broadcasts frequency could be shifted to VHF
channels at the cable head-end instead of the
final viewing location because the cable
television is representing a possible alternative
in deployment of UHF converters. Most cable
systems could not accommodate the full frequency
range of 54-890 MHz VHF/UHF and the twelve
channels of VHF space will get exhausted quickly
on most systems.
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In the late 1980s before cable-ready TV sets
became common, an electronic tuning device called
Cable Converter Box was needed to receive the
additional analog cable TV channels and
transpose/convert the channel selected to analog
radio frequency (RF) for viewing on a regular TV
set on a single channel.
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The box allowed the analog non cable ready
television set to receive analog encrypted cable
channels and it was a prototype topology for the
later date digital encryption devices. Newer
televisions were then converted to be analog
cypher cable-ready with the standard converter
which is built in for selling premium television.
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Several years later and slowly marketed the
advent of digital cable has increased the need
for several forms of these devices. To provide
compatibility to full VCR and the ability to
drive multiple TV sets some block conversion of
the entire affected frequency band onto UHF while
less common was used by some models with somewhat
nonstandard channel numbering scheme.
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Newer television receivers have greatly reduced
the need for external set-top boxes, even though
cable converter boxes continued to use descramble
premium cable channels according to
carrier-controlled access restrictions and also
to receive digital cable channels along with the
use of interactive services firstly through video
on demand, secondly by pay per view and finally
by home shopping through television.
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To Order Find Out More Information On Set Up Box
Suppliers Please Come And Visit Us Today
Onwards..!
Polytech Component Pte Ltd Contact Us 10 Ubi
Crescent 04-68 Singapore 408564 Tel 1 65
6742 7738 Tel [phone] Fax 65
6749 7793 Mail enquiry_at_polytech.com.sg Web
http//www.polytech.com.sg/