Sky
digital is used in many Hotels, Schools and communities, the requirement
is for one satellite dish to run a large number of Sky digital receivers,
each receiver must be capable of working independently as though it had
it's own separate dish. There are two main types of I.F distribution.
Using 1 to 4 Sky receivers
A Quad LNB can be used which has 4 independent outputs see: Satellite
Accesories / LNB's. From each of the 4 outputs a satellite
cable can be run to each Sky digital receiver. Always use a minimum 60cm
dish (If in the UK) this will provide a slightly higher signal plus it is a more
substantial dish to support the larger LNB.
Five or more Sky digital receivers
The dish set up is similar, but rather than use a Quad LNB a
Quattro LNB needs to be used. The Quattro LNB's have 4 outputs but each
output only receives one part of the 4 wavebands broadcast: High band V,
High band H, Low band V, Low band H. Each individual part is carried along
the 4 satellite cables and inserted into a multiswitch box, the inputs on
the box are marked: High V, High H, Low V, Low H. The multiswitch box
which has many outputs is designed to combine the 4 signal parts and allow
the full signal to be sent to any number of satellite receivers. The Multiswitch boxes are sold with 5 inputs to allow for the insertion of a
terrestrial TV signal if required. Once the signals have been combined in
the Multiswitch box, only one CT100 cable is
required from the Multiswitch box down to the Satellite receiver, this
lead can carry the Satellite signals and the Terrestrial TV plus FM or DAB
radio signals if required. A surface plate will need to be fitted at the
main TV point to separate the Satellite / TV / FM or DAB signals in order
that the appropriate appliances can be plugged in. See Triplex
surface plate.
Multiswitches
5 Inputs, 8 Outputs (For up to 8 receivers)
5 Inputs, 12 Outputs
5
Inputs, 16 Outputs
Working Diagram
Enquiry Form (Sky
Commercial)
If using more than
16
receivers each of the 4 incoming signals can be split into 2 for adding
further multiswitches etc.
NB: The above shows a basic Sky commercial distribution, there are
alternative ways of distributing the signals for larger contracts or long
cable runs between various dwellings. IE: Using cascading mutiswitches,
these will allow the incoming signals to provide satellite &
terrestrial distribution points at various locations throughout the
building, the whole system can be powered up using one power unit located
at the head end. Please telephone us for further details.
Channelised Distribution This is commonly used in hotels, it allows
for a number of Sky channels to be broadcast without requiring receiver
boxes in each room. The set up is the same as above, the main difference
is that all the Sky receivers are placed into a central control room and
programmed to transmit one channel only. The number of Sky channels
required depends on the number of receivers used, the receivers are
remodulated (RF output changed) to avoid interference and combined with
the existing TV aerial cable. The end result being that the guest can have
channel 6 as Sky news, channel 7 as Sky sports etc. This process requires
specialised metering equipment and requires the services of a competent
engineer.
If you require additional information on these systems please see our Secure
Shopping Cart or 
contact us on 01225 709941.
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