Standards and other deliverables of the EN 50083 and EN 60728 series deal with cable networks including equipment and associated methods of measurement for headend reception, processing and distribution of television and sound signals and for processing, interfacing and transmitting all kinds of data signals for interactive services using all applicable transmission media. These signals are typically transmitted in networks by frequency-multiplexing techniques.

This includes for instance:

regional and local broadband cable networks,
extended satellite and terrestrial television distribution networks and systems,
individual satellite and terrestrial television receiving systems
and all kinds of equipment, systems and installations used in such cable networks, distribution and receiving systems.

The extent of this standardization work is from the antennas and/or special signal source inputs to the headend or other interface points to the network up to the terminal input of the customer premises equipment.

The standardization work will consider coexistence with users of the RF spectrum in wired and wireless transmission systems.

The standardization of any user terminals (i.e. tuners, receivers, decoders, multimedia terminals etc.) as well as of any coaxial, balanced and optical cables and accessories thereof is excluded.

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PDF Pages	PDF Title
8	1 Scope 1.1 General 1.2 Specific scope of this Technical Report 2 Normative references
9	3 Terms, definitions, symbols and abbreviations 3.1 Terms and definitions
12	3.2 Symbols
13	3.3 Abbreviations
15	4 Network architecture 4.1 HFC architecture
17	4.2 Upgrade alternatives 4.2.1 Introduction
21	4.2.2 Re-arrange the feeds
22	4.2.3 Frequency stacking
24	4.2.4 Multiple fibres
25	4.2.5 Wavelength division multiplexing (WDM) 4.2.6 Digital return technology
27	4.3 Active or passive return path 4.4 In building network 4.5 In home network
28	5 Network design 5.1 Considerations 5.2 Return path loss, path loss difference and return path slope 5.2.1 Return path loss 5.2.1.1 Introduction and overview
31	5.2.1.2 Types of attenuation 5.2.1.3 Practical example
32	5.2.2 Return path loss difference and return path slope 5.2.2.1 Introduction 5.2.2.2 Calculation of the change of return path slope with temperature
33	5.3 Noise and nonlinearity, optimizing signal levels 5.3.1 Passive return paths 5.3.2 Amplification on the return path
34	5.3.3 Estimating return path carrier to noise ratio 5.3.3.1 Introduction 5.3.3.2 Calculation of RF section 5.3.3.3 Calculation of optical section
35	5.3.3.4 Cumulative return path carrier to noise ratio 5.4 Isolation between outlets 5.5 Equalization and filtering in return paths 5.5.1 Introduction
36	5.5.2 Purpose of ISF filters 5.5.2.1 Ingress suppression 5.5.2.2 Return path equalization 5.5.2.3 Suppression of spurious signals of modems
37	5.5.2.4 Distinction between ingress sources 5.5.3 Calculation of the ISF value 5.5.4 Quick method
38	5.5.5 Dynamic ingress blocking 6 Channel planning 6.1 Purpose of this section 6.2 Introduction 6.3 Summary
39	6.4 Considerations for channel planning 6.4.1 Introduction 6.4.1.1 Adjacent channel operation 6.4.1.2 Usable bandwidth 6.4.2 Sources of ingress 6.4.2.1 Introduction 6.4.2.2 Sources of narrowband ingress 6.4.2.3 HF propagation 6.4.2.4 Users of the HF radio spectrum
40	6.4.2.5 Broadcasting 6.4.2.6 Amateur radio and CB radio
41	6.4.2.7 Other services 6.4.3 Fitting data carriers within the ingress gaps
43	6.5 Common path distortion products 6.6 European upstream bandwidths 6.7 Channel width 6.8 QPSK/16QAM operation and channel widths 6.8.1 Upstream symbol rates 6.8.2 Spectral shaping (DOCSIS/EuroDOCSIS)
44	6.9 Available return path spectrum (Table 8)
45	6.10 Channel plans 6.10.1 Examples
46	6.10.2 Suggestions and comments
47	6.11 Network radiation 7 Equipment for return path implementation 7.1 General 7.2 Return path amplifiers 7.2.1 General
48	7.2.2 Return path gain 7.2.3 Amplifier technology 7.2.4 Amplifier adjustments
49	7.2.5 Test points and injection points 7.2.6 Diplex filters 7.2.7 Other filters 7.2.8 Ingress switch
50	7.2.9 Corrections and compensations 8 Installation and maintenance 8.1 Signal level adjustment 8.1.1 Introduction 8.1.2 Traditional method
51	8.1.3 Unity gain method
52	8.1.4 Commissioning of the fibre section 8.1.4.1 Introduction
53	8.1.4.2 Return path commissioning by using the unity gain method
54	8.2 Monitoring and measurements 8.2.1 General
55	8.2.2 Automated monitoring system 8.2.3 Manual monitoring 8.2.4 Principles of effective return path maintenance 8.2.5 Alarm thresholds for monitoring the upstream direction

Status	Definitive
Pages	82
Publication Date	2014-06-30
ISBN	978 0 580 85318 0
Standard Number	PD CLC/TR 50083-10-1:2014
Title	Cable networks for television signals, sound signals and interactive services – Guidelines for the implementation of return paths in cable networks
Identical National Standard Of	CLC/TR 50083-10-1:2014
Replaces	PD CLC/TR 50083-10-1:2009
Descriptors	Radio channels, Cable television, Acoustic signals, Telecommunication, Television systems, Visual signals, Radio networks, Television networks, Television channels, Radio disturbances, Telecommunication systems, Wire transmission (telecommunication), Frequency modulation, Broadcasting networks, Communication networks, Coaxial cables
Publisher	BSI
Committee	EPL/100
ICS Codes	33.060.40 - Cabled distribution systems


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BSI PD CLC/TR 50083-10-1:2014

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