BS EN 50607-2015 Satellite signal distribution over a single coaxial cable Second generation《单一同轴电缆卫星信号分配 第二代》.pdf

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1、BSI Standards PublicationBS EN 50607:2015Satellite signal distributionover a single coaxial cable Second generationBS EN 50607:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 50607:2015. Itsupersedes PD CLC/TS 50607:2013 which is withdrawn.The UK participat

2、ion in its preparation was entrusted to TechnicalCommittee EPL/100/4, Cable distribution equipment and systems.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. User

3、s are responsible for its correctapplication. The British Standards Institution 2015. Published by BSI StandardsLimited 2015ISBN 978 0 580 86342 4ICS 33.060.40Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of th

4、eStandards Policy and Strategy Committee on 31 January 2015.Amendments issued since publicationDate Text affectedBS EN 50607:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 50607 January 2015 ICS 33.060.40 English Version Satellite signal distribution over a single coaxial cable - Second ge

5、neration Distribution de signaux par satellite sur un seul cble coaxial - Deuxime gnration Verteilen von Satellitensignalen ber ein Koaxialkabel - Zweite Generation This European Standard was approved by CENELEC on 2014-10-20. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulat

6、ions which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC mem

7、ber. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versio

8、ns. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the

9、Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Manageme

10、nt Centre: Avenue Marnix 17, B-1000 Brussels 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 50607:2015 E BS EN 50607:2015EN 50607:2015 2 Contents Page Foreword . 3 Introduction . 4 1 Scope . 5 2 Normative references 5 3 Terms,

11、 definitions and abbreviations . 6 3.1 Terms and definitions 6 3.2 Abbreviations . 8 3.3 Used commands 8 4 System architecture . 9 5 SCIF control signals. 12 5.1 DC levels . 12 5.2 Method of the data bit signalling 14 6 Structure and format of the messages of the 2nd generation single cable distribu

12、tion system (SCD2)14 6.1 Backwards Compatibility to EN 50494 14 6.2 Non-DiSEqC structure . 14 6.3 Uni-directional operation 15 6.4 Bi-directional operation 15 7 SCD2 commands . 15 7.1 ODU_Channel_change . 15 7.1.1 Formats 15 7.1.2 “Special” frequencies . 16 7.2 ODU_Channel_change_PIN . 16 7.3 ODU_UB

13、_avail 17 7.4 ODU_UB_PIN 18 7.5 ODU_UB_inuse . 18 7.6 ODU_UB_freq 19 7.7 ODU_UB_switches 20 8 Conventions . 21 8.1 UB slots numbering . 21 8.2 Numbering of satellite IF banks . 22 9 Traffic collision management rules 22 9.1 General 22 9.2 Automatic detection of SCIF control signal failure . 22 9.3 P

14、seudo-random repeat 23 9.3.1 Handling of SCIF control signal . 23 9.3.2 Random delay generation law . 23 Annex A (normative) Implementation rules . 25 A.1 User interface 25 A.2 Installation impedance . 25 A.3 Signal reflection and return loss in installations 26 A.4 Power supply of the SCIF 26 A.5 R

15、emarks concerning power supply . 27 Bibliography 28 BS EN 50607:2015 3 EN 50607:2015 Foreword This document (EN 50607:2015) has been prepared by CLC/TC 209 “Cable networks for television signals, sound signals and interactive services”. The following dates are fixed: latest date by which this docume

16、nt has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2015-10-20 latest date by which the national standards conflicting with this document have to be withdrawn (dow) 2017-10-20 Attention is drawn to the possibility that some of the eleme

17、nts of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. BS EN 50607:2015EN 50607:2015 4 Introduction In EN 61319-1:1996, the interfaces for the control and command of the devices associated with the sat

18、ellite receivers are described in the following clauses: Clause 4: Interfaces requirements for polarizer and polar switchers; Clause 5: Interfaces requirements for low-noise block converters (LNB). In these clauses, analogue techniques are described for controlling the LNB and polar switchers. In th

19、e DiSEqCTMBus Functional Specification, the “Digital Satellite Equipment Control Bus” (called DiSEqC) is introduced as a single method of communication between the satellite and the peripheral equipment, using only the existing coaxial cables. The existing EN 50494 “Satellite signal distribution ove

20、r a single coaxial cable in single dwelling installations” describes a system for distributing signals via single coaxial cable issued from different bands and polarisations to several satellite receivers This specification is limited to 8 units per output of the Single Cable Interface and to 8 Sate

21、llite IF banks (bands, feeds, polarisations). The second generation described in this standard is intended for single and multiple dwelling installations and includes the following enhancements compared to EN 50494: The number of demodulators is extended to a maximum of 32 units per output of the Si

22、ngle Cable Interface (hereafter referred to as SCIF) device. The system is scaled for a maximum number of 256 Satellite IF banks (bands, feeds, polarisations) The SCIF replies, which may be used during installation process, are also based on DiSEqC. Equipment according to this standard is downwards

23、compatible to the specifications provided by EN 50494. BS EN 50607:2015 5 EN 50607:2015 1 Scope This European Standard describes: the system physical structure; the system control signals, which implement a set of messages using DiSEqC physical layer but not the DiSEqC message structure; the definit

24、ion of identified configurations; the management of the potential collisions in the control signals traffic. Figure 1 illustrates the physical system configuration considered in this standard. Several satellite signal demodulators can receive signals from any of the input signal banks (Bank 1, Bank

25、2, Bank M, with M 256) of the LNB or the switch. The signals selected by the demodulators (or receivers) are transported via a single cable to these demodulators (Receiver 1, Receiver 2, Receiver N, with N 32). To achieve these single cable distributions, the Single Cable Interface (SCIF, likely emb

26、edded in a LNB or a Switch) features some specific functions and characteristics. Figure 1 General architecture of the single cable distribution 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application.

27、 For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 50494, Satellite signal distribution over a single coaxial cable in single dwelling installations EN 60728-1, Cable networks for televis

28、ion signals, sound signals and interactive services Part 1: System performance of forward paths (IEC 60728-1) EN 60728-4, Cable networks for television signals, sound signals and interactive services Part 4: Passive wideband equipment for coaxial cable networks (IEC 60728-4) EN 61319-1:1996, Interco

29、nnections of satellite receiving equipment Part 1: Europe (IEC 61319-1:1995) IEC 60050-371, International Electrotechnical Vocabulary - Chapter 371: Telecontrol IEC 60050-721, International Electrotechnical Vocabulary - Chapter 721: Telegraphy, facsimile and data communication BS EN 50607:2015EN 506

30、07:2015 6 DiSEqCTMBus Functional Specification, Version 4.2, February 25, 199813 Terms, definitions and abbreviations 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 60050-371, IEC 60050-721, EN 60728-1 and the following ones apply. 3.1.1 bank grou

31、p of contiguous channels belonging to a polarisation and/or a band 3.1.2 channel radio frequency transponder signal 3.1.3 command information used to cause a change of state of operational equipment; could be part of message SOURCE: IEC 60050-371:1984, 371-03-01, modified 3.1.4 committed switch swit

32、ch with specified functions (band, polarity, position, option) 3.1.5 demodulator electronic device transposing the selected channel into the required content 3.1.6 idle mode operation mode on low DC level 3.1.7 message group of characters and function control sequences which is transferred as an ent

33、ity from a transmitter to a receiver, where the arrangement of the characters is determined at the transmitter SOURCE: IEC 60050-721:1991, 721-09-01 3.1.8 multi dwelling unit MDU building with many homes or offices used by single owners where television signals and sound signals are distributed and

34、with access to interactive services SOURCE: IEC 60728-1:2014, 3.1.64, modified 3.1.9 nibble half byte 1Available from http:/ BS EN 50607:2015 7 EN 50607:2015 3.1.10 receiver electronic equipment embedded in a cabinet and integrating all functions for demodulating and decoding the received satellite

35、signals (a receiver may integrate several demodulators) 3.1.11 SCIF control signal signal sent by the demodulator to select the bank and the frequency of the desired channel and to designate the UB slot allocated to the requesting receiver 3.1.12 single cable interface SCIF central unit of a single

36、cable distribution system which selects the desired channels from different banks at its input ports and allocate them to the designated UB slots at its output port 3.1.13 single dwelling installation installation for a home or office used by a single owner where television signals and sound signals

37、 are distributed and there is access to interactive services 3.1.14 tuning word information carried by the command ODU_Channel_change to select the desired channel in the SCIF 3.1.15 uncommitted switch switch without specified functions 3.1.16 universal architecture LNB with the following characteri

38、stics: operation in the Ku band (10,7 GHz to 12,75 GHz); local oscillator frequency is 9,75 GHz for signal frequencies lower than 11,7 GHz and local oscillator frequency is 10,6 GHz otherwise 3.1.17 user band UB part of the bandwidth of the shared coaxial cable which is allocated to one receiver con

39、nected to the single coaxial cable distribution system for the reception of the desired channel 3.1.18 user band slot UB slot one of N bands in which the total transmission bandwidth is sub-divided Note 1 to entry: The number of user band slots Nb_ub is a characteristic of the SCIF used. Note 2 to e

40、ntry: The system defined in this standard limits the number of UB slots to 32 per output of the SCIF. 3.1.19 wideband architecture LNB with the following characteristics: operation in the Ku band (10,7 GHz to 12,75 GHz); with only one local oscillator. Universal-LNB functionality is emulated by the

41、SCIF by adding or subtracting an offset for frequency conversion according to lowband/highband selection BS EN 50607:2015EN 50607:2015 8 3.2 Abbreviations CSS Channel Stacking System CW Continuous Wave DC Direct Current DiSEqC Digital Satellite Equipment Control High_DC High level of DC voltage DCHi

42、ghIF Intermediate Frequency LNB Low Noise Blockconverter Low_DC Low level of DC voltage DCLowLSB Least Significant Bit MDU Multiple Dwelling Unit MSB Most Significant Bit Nb_B Number of Banks NbBNb_ub Number of user bands NbubODU Out-Door Unit PCR Program Clock Reference PIN Personal Identification

43、Number PWK Pulse Width Keying SCD2 Single Cable Distribution 2 (second generation) SCIF Single Cable Interface STB Set-Top Box UB User Band UB-ID User Band Identifier 3.3 Used commands ODU_Channel_change Unidirectional command sent by the receiver for tuning to a required channel ODU_Channel_change_

44、PIN Option for PIN protection of UB in the ODU_Channel_change command ODU_PowerOFF Unidirectional command sent to SCIF before the receiver turns into standby ODU_PowerOFF_PIN Unidirectional command to turn-off the PIN protected UB slot ODU_UB_avail Bidirectional command for requesting information ab

45、out user bands available ODU_UB_frequ Bidirectional command for requesting the centre frequency of a specific user band ODU_UB_inuse Bidirectional command for requesting information about user bands currently in use ODU_UB_PIN Bidirectional command for requesting information about PIN protected user

46、 bands ODU_UB_switches Bidirectional command for requesting information about the available bank switches of a specific user band ODU_UBxSignal_ON Command from a receiver, specified in EN 50494, which causes the SCIF to switch on CW tones at the centre of all (maximum 8) user bands BS EN 50607:2015

47、9 EN 50607:2015 4 System architecture In the single coaxial cable distribution system, the bandwidth of the shared coaxial cable is divided into slots (user band: UB). The number of slots Nb_ub varies from one application to another; the number of slots Nb_ub is a characteristic of the SCIF. The sys

48、tem defined in this standard limits the number of UB slots to 32 per output of the SCIF. Each receiver connected to the single coaxial cable distribution is allocated to one UB slot. This allocation is done either in static or other modes. In the static mode, the allocation of the UB slot is done du

49、ring the installation of the satellite receiver. Only the static mode is considered in this document. NOTE Other modes are not described in this document but could be considered in a further release or annex of this standard. After the slot allocation, the tuner of the receiver operates at a single frequency (centre of the slot UB). To select a desired channel (frequency Fd), the demodulator sends a SCIF control signal that provides the following information: select