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Satellite television distribution systems can provide reception from
many satellites but most provide reception of Astra at 28 degrees, which
includes the Sky digital programmes. Additionally, systems normally provide
each apartment with analogue terrestrial television, BBC1, BBC2, ITV, Channel
4, Channel 5, digital terrestrial multiplexes 1-6 and usually FM Radio BBC
radio |
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TO RECEIVE PROGRAMMES
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In order to receive the programmes, it is necessary to have a satellite
receiver /decoder. The decoder should be connected to both the SMATV
outlet plate and connected to the television. The satellite decoder
instruction book will detail the connections. The interconnections should
be done with the leads provided with the decoder and with a special
lead called a fly lead. Once the decoder has been connected to the
television, then the television needs to be be tuned to the programmes by
following the television instruction book. |
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TUNING IN TERRESTRIAL
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The signals from the system may be on different channels to normal
and so it is best to tune the television in when first connecting to a system.
This may be in the same way that one would normally tune a television in
for the first time. Most modern televisions have automatic search facilities
which may be used. Sometimes the channels on the system are different
to those from the transmitter. Sometimes the transmitter channels are
picked up weakly on the system. Sometimes, the auto tune on a television
will tune to the weak picked up signals and not the proper ones. If
you think this may have occurred then it is best to manually tune. The
list of channels below is common for London area systems. |
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FLY LEAD FOR TERRESTRIAL
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The fly lead should be made from a double screened coaxial cable,
should be kept as short as possible and should be one continuous length.
Coaxial cables are fragile and can be easily crushed or damaged by
bending. When damaged, much of the signal can be lost in the cable affecting
the quality, with analogue reception causing snowy pictures and with digital
causing blocking. The fly lead should have an industry standard, IEC, coaxial
connection at each end. |
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| A fly lead with IEC coaxial plug |
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SATELLITE OUTLET PLATE
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The satellite and aerial outlet plate on an SMATV system usually has
three sockets, one each for radio, television and satellite. For
television, the socket marked TV should be used. For satellite, the
socket marked SAT should be used. |
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| Typical outlet plate for an SMATV system |
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FLY LEAD FOR SATELLITE
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The fly lead should be made from a double screened coaxial cable,
should be kept as short as possible and should be one continuous length.
Coaxial cables are fragile and can be easily crushed or damaged by
bending. When damaged, much of the signal can be lost in the cable affecting
the quality of digital reception and causing blocking. The fly lead should
have an industry standard, F connection at each end. |
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| A fly lead with an F connector |
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