Sky Homes Specification for an
Integrated Reception System
Replacement MDU
Version 2.02 Dated 1st June 2005
Copyright BSkyB 2005
Contents
Section
Page
Introduction
3
General
4
Errors
4
Services
5
Specifications
6
Plans
6
Performance of System
6
System Levels
7
Installation Process
7
Materials
8
Television and Audio Aerials
8
Satellite Dishes
9
Dish Alignment
9
Headend Equipment/Repeater Amplifiers
9
Cables and Fixings
9
Mounting Boxes
12
Passive Accessories
12
Socket Outlets
12
Sky Plus
13
Safety
13
Test of the Installations
14
Final Commissioning
14
Defects Liability and Maintenance
14
Maintenance Contract
15
Rental Contracts
15
Appendix A
16
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INTRODUCTION: PURPOSE OF THIS DOCUMENT
This document sets out a summary Specification of requirements for
communal television aerial systems to be installed in residential buildings
owned or managed by local authorities, housing associations and other
landlords (“the Landlord”). We recommend that all systems should be
designed and installed to meet these standards. However, this does not
preclude individual Landlords from adding supplementary requirements to
meet local needs.
This document is intended for purposes of preliminary planning and
tendering. It may be incorporated in specific legal agreements between
individual Landlords and installing Contractors. However it must be used in
its entirety, extracts may not be used in isolation. Copyright in this document
belongs to British Sky Broadcasting Ltd.,
The systems to be installed constitute Integrated Reception Systems as
defined by Sky Homes. The intended effect of such a system is to provide a
full range of television signals (satellite and terrestrial, analogue and digital)
and radio (both FM and DAB) to every home covered by the system. This
broad range is intended to provide the widest possible choice to tenants in
deciding which services to use. It will also enable the provision of interactive
TV services and an infrastructure for local security and information systems.
In order to provide this range of facilities, every IRS must incorporate,
besides appropriate aerial, satellite dish and headend equipment, a system
of independent cabling to every home and a specific outlet within every
home. These items are all described in the succeeding pages.
This document also describes in outline the procedures required for
planning the upgrading of individual systems, for reporting and keeping
records of work done, and for managing changes agreed while work is in
progress. Conformity with these administrative provisions will be an
essential part of the contract.
Whilst we have taken considerable care to verify the accuracy and validity of
the information contained in this Specification, BSkyB disclaims any
responsibility for faults arising in the specified equipment or from the
manner of its installation. Every user of this Specification should check the
information provided to it hereunder and must take responsibility for the
reliance placed on this document and any agreed variation to it.
Furthermore we will not be liable to you under any circumstances
whatsoever for any, indirect, consequential, or special damages arising
from your use of or reliance on this Specification.
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GENERAL
The Contractor shall supply, install, test and commission a Five cable
Integrated Reception System, comprising four cables providing individual IF
Polarities, see page 5 for the programme requirements, and one cable
providing terrestrial frequencies between 88MHz.and 862MHz, in the bands
indicated on page 5, through switching devices to a minimum of one
position, via two cables, ( see section, Cables and Fixings on page 9) in
each dwelling within the buildings listed in the schedule agreed with the
Landlord.
The Contractor will ensure that in the course of his works existing television
and radio services continue to be available to the residents.
The Contractor will confirm the addresses, including postcodes, which have
been attached to the given head-end, once the Installation is complete.
The systems shall comply with the current technical conditions of the
Licensing Authorities. It will be the responsibility of the Contractor to
determine the requirement for any licences and apply for any licence that a
building may require. BSkyB will not be responsible for the non-application
of any licence.
The Contractor shall be a member of the Confederation of Aerial Industries
and have the relevant qualifications for Television Distribution Systems.
Where a non-employed sub-contractor is used, then the primary aerial
installation Contractor will remain responsible for the sub-contractor’s work.
ERRORS
Where the Contractor believes that these Specifications are incomplete in
any respect or that additional details are required for the satisfactory and
safe operation of the proposed systems, the Contractor shall notify the
Landlord immediately and shall be responsible for developing the
necessary additional Specifications and ensuring that the proposed system
can be operated in a satisfactory and safe manner.
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SERVICES
The services to be provided using the proposed system are as follows:
SERVICE
PROGRAMMES
FREQUENCY
Terrestrial
BBC 1
UHF
Analogue
BBC 2
UHF
ITV
UHF
Channel 4
UHF
Channel 5
UHF
Terrestrial Digital
Multiplex 1
UHF
Multiplex 2
UHF
Multiplex 3
UHF
Multiplex 4
UHF
Multiplex 5
UHF
Multiplex 6
UHF
RSL Analogue
Locally advised UHF
UHF
Satellite Digital
All Horizontal and Vertical
IF
transmissions, both Low Band
and High Band from the
28degree east orbital position,
in the transmission range from
10,700 MHz – 12,750MHz.
FM Radio
The national and local services,
Band II
legally transmitted to the general
area of the site concerned.
DAB
T h e R a d i o p r o g r a m m e s
Band III
provided by the DAB services.
Closed Circuit TV
Where applicable
UHF
Camera
It should be noted that, in certain parts of the United Kingdom, analogue
terrestrial Channel 5 and some digital terrestrial multiplexes are not
available. The Contractor shall indicate which of the above services (if any)
will not be available over the proposed system. RSL (Restricted Service
License) services do not have a long-term license and cover a small
geographical area. Any inclusion of a RSL service should not be seen as
permanent.
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The Contractor must perform a site test at each location to determine
that all the services listed above are available at the levels required for
distribution (see below). If any service is, as a result of the site test, found
not to be available this must be reported to the Landlord immediately so
that an agreement may be made as to which services will be provided
SPECIFICATIONS
The systems must conform to the following standards and codes of
practice:
•
CENELEC BS EN 50083 all relevant parts.
• CENELEC
BS
EN
50117
for
coaxial
cables.
• CENELEC
BS
EN
60966
for
connecting
cables.
• BS
4662:1970
–
Specification
for
boxes
for
the
enclosure
of
electrical accessories.
•
BS 5773:1995 – Specification for general requirements for
electrical accessories.
• The
Confederation
of
Aerials
Industries Codes of Practice for
Television Aerials, and TV Systems.
•
The requirements of the DTG book 3 in respect of the system
for the Digital Terrestrial services (except to the extent that
technical differences apply, when this Specification will
override DTG book 3).
• IEE
regulations
(latest
edition).
PLANS
All system planning must be undertaken to avoid common analogue
interference patterns and particular reference to channel N+/- 1, 5 and 9
must be taken into account when allocating frequencies.
A schematic plan representing the installed system in block diagram form,
showing locations of equipment, types of cables and earthing
arrangements must be submitted to the Landlord for final approval.
PERFORMANCE OF SYSTEM
It will be the responsibility of the Contractor to familiarise itself with the site
and local conditions prior to tendering. The Contractor must satisfy itself that
the services stated are available on each of the sites indicated, and that the
quality of the signals will enable him to meet the relevant Specification
requirements indicated. If any of the services are not available the
Contractor must notify the Landlord in writing.
Should the Contractor believe that the suggested plans, if supplied, do not
meet the performance criteria this must be highlighted at the time of tender,
together with alternative proposals.
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If, in the course of the installation, the Contractor believes that plans will
have to be changed, the Landlord must be notified immediately and any
costs etc. agreed between the Contractor and the Landlord before
installation work continues.
SYSTEM LEVELS
All signal levels must comply with the maximum provided for by the
amplifiers to be installed taking into account adequate derating for the
number of channels distributed and amplifiers in cascade
The maximum/minimum levels at each outlet position on the system are as
follows.
FREQUENCY BAND
MAXIMUM LEVEL MINIMUM LEVEL
Band II FM Radio
74 dBuV
54 dBuV
Band III DAB
65 dBuV
45 dBuV
Band IV/V Analogue
80 dBuV
60 dBuV
Band IV/V Digital
65 dBuV
45 dBuV
Satellite IF Digital
77 dBuV
52 dBuV
The terrestrial Digital signals will require a minimum Carrier to Noise at
the outlets of 26 dB
The Satellite Digital frequencies will require a minimum Carrier to Noise
at the outlets of 9 dB.
Measurement of Carrier to Noise should be made against a 'noise floor'
and not between transponders. The recommended frequencies to set the
noise floor are 1980MHz. in the low band and 1080MHz. in the high band.
Should a transponder signal be present at these frequencies than the
'noise floor' frequency should be adjusted to avoid conflict. The new
frequency should be noted and advised on the completion certification.
INSTALLATION PROCESS
The installation process is broken down and shall be completed in
accordance with the following order of work. Any deviation from this process
may only be taken after consultation with and agreement of [
Landlord] and
after such agreement has been advised by [
Landlord] in writing.
1. Survey
2. Pre Installation preparation, e.g. Core drilling.
3. Installation of antennas and dishes. Determine adequate signal levels
and advise if one or more component measurements are inadequate.
Advise [
landlord], in advance of any further work, which programmes may
be affected.
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4. Installation of containment, particularly of any containment required for
the network backbone. Installation of Containment for “Drop-Cables”,
within a dwelling, should be completed at stage 8
5. Installation of backbone cables.
6. Installation of Head-End, including remote located switches and
repeater amplifiers etc.
7. Connection of backbone and commissioning of system.
8. Installation of "Drop-Cables" to individual homes and connection of new
socket-outlets. Any AV equipment connected to the old system should be
connected to the new system and confirmation that the new system is
working and delivering the required signals, is made to the resident. The
resident should sign a document to that effect. Any dwelling where the
contractor is unable to gain access should be noted and the date and
time of non-access advised to the landlord.
9. Any old system that has been replaced should be switched off after a
period of time, to be determined by [Landlord]. Redundant equipment
should be removed and handed to the [Landlord] for disposal.
MATERIALS
All materials must be new and previously unused. All goods and materials
used in providing the system shall conform to EU and national standards,
where such standards have been established, and to the Codes of practice
issued by the relevant industry bodies.
All amplifiers and distribution equipment shall be sourced from a Sky
Homes partnering supplier, See appendix A for details.
All Equipment must be able to cope with the minimum and maximum signal
levels, as approved, in the CAI SMATV Code of Practice and those levels
listed above for the given frequencies in use.
No departure from the specified and/or approved materials will be accepted
until prior sanction in writing has been given by Sky Homes.
TELEVISION AND AUDIO AERIALS
The aerials will be from an approved supplier and comply with the CAI Code
of Practice. The aerial support structure must be connected to the PME.
All UHF antennas must incorporate a Balun to ensure the matching of the
dipole to the feeder cables.
The aerial system, mounts, support structures etc. must be capable of
withstanding winds of 100mph/160kph.
SATELLITE DISHES
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Satellite dishes must be constructed to withstand a windspeed of
60mph/100kph and be of an adequate size for the system concerned and
be able to produce a 15dB carrier to noise level at the installations site, for
the given transponders being received. All satellite mounts must be
connected to the PME.
The Landlord must agree the final position for aerials and satellite dishes. If
more than two satellite dishes are required, planning permission must be
obtained.
DISH ALIGNMENT
Dishes shall be aligned for maximum signal strength and carrier to noise
ratios. The LNB shall be aligned so that the horizontal and vertical
transponders appear equal and give maximum rejection of the opposite
polarity. This is to avoid cross polarisation problems.
HEADEND EQUIPMENT /REPEATER AMPLIFIERS
All equipment should be powered at 230 volts except where line powering of
multiswitches etc is required.
If the multiswitch is line powered from a Sky Set Top. Box only and no other
power supply is used, care must be taken to ensure that the maximum
current drawn, including the LNB, is less than 315mA. The system, in this
instance must be able to be run from 1 Set Top Box only.
Note: Set Top Box powered multi switches should only be used where there
is no requirement for terrestrial signals as the powering arrangement may
be insufficient to amplify Terrestrial signals.
The equipment must be securely mounted and accessible for maintenance
purposes in a dry secure location.
No equipment must be mounted in, or accessible from, any dwelling.
Where required, a suitable weatherproof housing to an IP55 specification
must be supplied.
CABLES AND FIXINGS
All cables shall be manufactured to the relevant parts of Specification BS
EN 50117 All cables must have passed the benchmarking approval test as
conducted by RN Electronics and have a certificate issued by the
Confederation of Aerial Industries to confirm that the cable meets with the
benchmarking approvals.
All co-axial cables shall be sourced from a Sky Homes partnering supplier,
see appendix A for details
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All coaxial cable shall have a nominal characteristic of 75 ohms and will be
suitable for the application concerned. The Contractor should take into
account any requirements for special cable constructions such as LSZH
(Low Smoke Zero Halogen)
Only PVC cables may be installed within ducts or risers.
If installed underground, the cables must be of the Bonded Shield type or
installed within a suitable 110mm (outside diameter) ducting. Bonded
Shield cables must contain a water barrier consisting of a polythene-
backed aluminium foil tape embedded in the sheath.
All underground cables will be in a separate green duct of 110mm (outside
diameter) and of a suitable quantity to take the number of cables involved.
The ducting type must be approved by the Landlord.
The Landlord must be consulted and approval given for all routes below
paths, roads etc. as ducting requirements may vary.
No underground joints in the cables will be allowed. All joints must be made
above ground
The cable must be earthed as necessary and at no point on the system
must the loop impedance be greater than five ohms.
Where applicable (in general terms this is where the cable needs
protections from possible vandalising) external cables shall be protected by
conduit, capping or trunking of a suitable size. All external surface routes
must be cleared with the
Landlord before installation.
Vertical spanned cables may be installed where cables are to be located on
the outside of a building. Cables should be attached, as a harness, to a
suitable catenary of galvanised or stainless steel catenary rope. Which in
turn is fixed, by the use of u clamps, using a minimum of two clamps at
each fixing point, at the top and bottom of each vertical span and tensioned
to prevent displacement.
Where cables are run across a flat roof area, they should be installed on a
suitable cable tray of galvanised material. The tray should be fixed, at not
less than one metre spacing, to a heavy duty brick or concrete block, by
means of a standard screw and plug fixing, two fixings to each brick or
block. The brick or block should be laid on a non-penetrating membrane of
rubber or on two layers of mineral roofing felt. The substance used should
be cut to the size of the brick or block and loose laid on the existing roof
surface. Care must be taken should any shingle be located on the roof that
the placing of any Bricks or Blocks does not cause penetration of the
existing roof surface. Alternatively, a proprietary support unit may be used in
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place of the brick or block, such unit to be approved by the
[Landlord], in
writing prior to installation and installed to the manufacturer’s instructions.
Cable trays that are fixed vertically should be fixed using a method that
locates the tray against a vertical surface, with a minimum spacing off of that
surface of 12mm, at no more than one metre spacing so that the tray does
not move in any plane.
All cable trays must be earthed in line with the earthing statement of the IEE
so that the installation meets 16th (or later) edition regulations.
Internal cables, located in building risers, must be fixed to a cable tray or
located within an enclosed conduit or trunking.
Overhead spans (of open public spaces) shall not be used unless no other
route is available. Even then, they shall only be used with prior consent of
the Landlord. Allowance must be made for likely interference if this method
is used.
All cable installation routes must follow a ‘Star Wired’ or ‘Tree & Bush’
installation format. For the purposes of this document the above terminology
is described below.
A – ‘Star Wired’ An individual cable will route from the wall socket,
uninterrupted, to the Head-End, which will be located in a central position
within the designated building.
B – ‘Tree & Bush’ An individual cable will route from the wall socket,
uninterrupted, to a switch position, which may be located away from the
Head-End.
In both A and B above, should there be a distribution system, or method of
split cables, installed within the dwelling, then the cable route may be
interrupted, providing all terminations are correctly made off and any signal
losses accounted for.
Cables destined for one dwelling must not be routed through another
dwelling. Should this be the only route of access available then the
contractor must obtain written permission from the [
landlord] prior to any
work commencing.
Cables can only be installed in roof spaces where no other route exists.
Within the head-end and network, the connection of the coaxial cable will be
via ‘F’ type and IEC connectors only. All ‘F’ connectors must be crimped and
IEC connectors should be of a professional design and correctly made off.
All connectors should be the correct size for the cable used.
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The Contractor will supply one 2m fly lead from the outlet point, within each
dwelling to the TV, or video recorder. Where a satellite receiver is installed, a
2m fly lead will also be supplied to connect the IF outlet point to the satellite
receiver. All fly leads will be ‘Double Screened’ and comply with the relevant
parts of BS EN 60966.
MOUNTING BOXES
In new build or refurbishment work, flush metal boxes shall comply with
BS4662 and have a minimum internal depth of 40 mm. When installed as a
stand-alone upgrade existing wiring boxes to BS4662 may be used
provided that they have a minimum internal depth of 25 mm. All cable exits
from the boxes shall be grommeted so as to prevent damage to the cable.
Flush mounted boxes of insulating material may be used in hollow partition
walls of plasterboard and similar material and shall have a minimum
internal depth of 40 mm, comply with BS5773 and have mounting centres
compliant with BS4662.
Where surface mounted boxes are used, they shall be of moulded
insulating material, have a minimum internal depth of 40 mm, comply with
BS5773, have mounting centres compliant with BS4662 and be of a style
and colour consistent with that of any electrical wiring accessories installed
in the same dwelling.
In all cases, care shall be taken to ensure that all cable bending radii are no
smaller than those advised by the cable manufacturer.
PASSIVE ACCESSORIES
All accessories must conform to the requirements of Cenelec BS EN 50083.
All passive accessories will be 75 ohms. All satellite IF frequencies will be
connected using ‘F’ type connectors.
External equipment will be housed in suitable waterproof enclosures,
conforming to IP55 Specification. Al external enclosures must be approved
by the Landlord prior to installation.
SOCKET OUTLETS
The system must be connected to at least one socket outlet in every home.
All socket outlets must be fully screened, surface or flush mount type, and
have a minimum of four connecting points individual sockets shall be
provided for TV, Satellite1, Satellite 2, (Sky+) and Audio (covering both FM
and DAB frequencies) They must be approved for use on ‘Sky Homes’
installations and carry the ‘Sky Homes’ logo. Where required, sockets must
be capable of passing the Digibox infra-red remote control signals.
SKY PLUS
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To accommodate future expansion and to allow for expected product
development all installations shall be capable of supporting Sky+ Set top
box installations.
SAFETY
The total system must be installed to comply with the requirements of all
relevant Health and Safety legislation and the safety statement as issued by
the CAI.
All relevant equipment must be Safety Earth Bonded in compliance with BS
EN 50083. All co-axial outer connections must be permanently bonded to
the building’s PME. It is the responsibility of the Contractor, and in particular
the installing or servicing engineer, to ensure the system complies with all
safety matters.
Practical Safety Earth Bonding should follow the procedure set out below,
however the requirements of the CAI statement, noted above give the
technical requirements.
Incoming cables from antennas should be bonded across the outer sheath
of all relevant co-axial cables prior to the input of the IF/RF amplifiers.
Drop Cables from Multiswitches to outlet plates should be bonded across
the outer sheath of all drop cables.
All electrical and electronic devices should be bonded to each other by
means of an earth tag. Incoming and outgoing earth cables should be fixed
in such a manner that should the device be disconnected from the system
then the integrity of the earth is maintained. In general terms this would
mean the earth cables being crimped together. Individual earth cables must
not be wrapped around earth posts.
The system must be earthed, via a minimum 4mm earth Cable, taking into
account the CAI statement on Earth Bonding and the requirement to
maintain no more than a 5 ohm loop resistance, to the Buildings PME.
Where individual buildings share an installation the earth must be
connected to the relevant Building PME.
The external Aerial Mount should also be connected to the installations
earth.
If a Lightning Protection System is installed on the given building then the
aerial mount should be connected to the protective strip by use of proper
LPS equipment.
TEST OF THE INSTALLATIONS
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Before the hand-over of each system and before completion of the contract,
the whole system must be tested by the Contractor to ensure that the
system complies fully with the Specification. The tests will include the
maximum and minimum signals for each of the services, measured at the
socket outlets as specified by the Landlord. The Contractor shall provide a
printed record of all measurements, either in tabulated or spectrum form, to
Sky Homes and to the Landlord, and shall also keep a set on file.
FINAL COMMISSIONING
The Contractor will have to supply a final commissioning certificate,
indicating signals at the inputs and output of the main equipment and levels
received at the outlets. The Contractor will have to demonstrate to the
Landlord that the picture quality on all the services stated is to CCIR grade 4
on the analogue television channels and error free on the Digital channels.
The Contractor will provide all certification forms in a format provided by Sky
Homes.
Test equipment must be accurate to within +- 1.5 dB and suitable for all the
services indicated. The minimum requirement is a Spectrum Analyser, a
simple signal strength indicator is not sufficient.
DEFECTS LIABILITY AND MAINTENANCE
The Contractor shall maintain the complete system to this Specification,
without charge for a period of 12 months from the final date of
commissioning.
At the end of the twelve month defect period the Contractor will submit
certification of signal levels on each system as received at an agreed
number of outlets, with proof of performance. This document will be taken
as the final certificate.
The Contractor will attend to faults as reported by the Landlord within 24
hours or as otherwise agreed in writing by all parties concerned.
All cables and equipment found to be faulty within the initial 12 month period
will be repaired or replaced free of charge to the Landlord. If the fault is
outside the control of the Contractor, the Landlord will accept a reasonable
charge by the Contractor to rectify the fault.
MAINTENANCE CONTRACT
The Contractor shall provide with his tender a proposal for a maintenance
contract for a given period of years or to be renewed yearly.
RENTAL CONTRACTS
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Any proposed rental/lease contract must include full labour and parts
maintenance for the given term of the rental or lease.
Appendix A – Recognised Manufacturer List
Co-axial Cables
Bieffe
Cables Britain Ltd
Unit 6 Waterfall Lane Trading Estate
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Waterfall Lane
Cradley Heath
Warley
West Midlands
B64 6PU
Tel: 0121 508 6890 Email: [email address],
WWW.cablesbritain.com
Pope
Webro Cables and Connectors
Vision House
Meadow Brooks Business Park
Meadow Lane
Long Eaton
NOTTS
NG10 2GD
Tel: 0115 972 4482, Email: [email address]
WWW.webro.com
Mains Powered Stand Alone Multiswitches
Spaun
Teldis ( A division of Megalith)Ltd.
Teldis House
29a Mount Ephraim
Tunbridge Wells
Kent
TN4 8AA
Tel: 01892 511411, Email: [email address]
WWW.teldis.com
Easyswitch
Teldis (A division of Megalith) Ltd.
Contact details as above
Fracarro
Fracarro UK Ltd.
Unit A Ibex House,
Kelller Close
Kiln Farm
Milton Keynes
Bucks
MK11 3LL
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Tel: 01908 571571, Email: [email address]
WWW.fracarro.com
Vision
Vision Products (Europe) Ltd
Bloxham Mill
Barford Road
Bloxham
Banbury
Oxon OX15 4FF
Tel 01295 724252 Email [email address]
www.vision-products.co.uk
Triax
Triax UK Ltd.
Abergorki Ind. Est.
Treorchy
Rhondda-Cynon-Taff
South Wales
CF42 6DL
Tel: 0845 601 0578 Email: [email address]
WWW.triax.co.uk
Global
Global Communications (UK) Ltd
Winterdale Manor
Southminster Road
Althorne
Essex
CM3 6BX
Tel: 01621 743440, Email: [email address]
WWW.globalcom.co.uk
Cascadeable Multiswitch Ranges
Spaun
Standard Range + Penta Tap Range
Contact details as above
Fracarro
GII Range, XS Range, XS Plus Range
Contact details as above
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Vision
V5 Range
Contact details as above
Triax
Districom 4000 Range + TMS Cascade Range
Contact details as above
Global
Switchmaster Range
Contact details as above
Receiver Powered Stand Alone Multiswitches
Easyswitch
Teldis ( A division of Megalith) Ltd.
Contact details as above
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