1、BRITISH STANDARD BS EN 60835-3-11: 1996 BS7573-3.11: 1996 IEC835-3-11: 1995 Methods of measurement for equipment used in digital microwave radio transmission systems Part 3: Measurements on satellite earth stations Section 3.11 Service channel equipment for SCPC-PSK transmission The European Standar
2、d EN60835-3-11:1995 has the status of a BritishStandard ICS 33.060.30BSEN60835-3-11:1996 This BritishStandard, having been prepared under the directionof the Electrotechnical Sector Board, was published underthe authorityof the Standards Boardand comes intoeffect on 15March1996 BSI01-2000 The follow
3、ing BSI references relate to the work on this standard: Committee reference EPL/12 Draft for comment95/210410 DC ISBN 0 580 25261 2 Committees responsible for this BritishStandard The preparation of this BritishStandard was entrusted to Technical Committee EPL/12, Radio communication, upon which the
4、 following bodies were represented: British Broadcasting Corporation British Radio and Electronic Equipment Manufacturers Association British Telecommunications plc ERA Technology Ltd. Institution of Electrical Engineers Radio, Electrical and Television Retailers Association Radiocommunications Agen
5、cy Amendments issued since publication Amd. No. Date CommentsBSEN60835-3-11:1996 BSI 01-2000 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 1 Scope 3 2 Normative references 3 3 General considerations 3 4 Measurement method 3 5 Presentation of results 4 6 De
6、tails to be specified 4 Figure 1 Set-up for testing service channel equipment 5 List of references Inside back coverBSEN60835-3-11:1996 ii BSI 01-2000 National foreword This BritishStandard has been prepared by Technical Committee EPL/12 and is the English language version of EN60835-3-11:1995 Metho
7、ds of measurement for equipment used in digital microwave radio transmission systems Part3: Measurements on satellite earth stations Section11: Service channel equipment for SCPC-PSK transmission, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical wit
8、h IEC835-3-11:1995, published by the International Electrotechnical Commission(IEC). BSEN60835 is published in three Parts. The other Parts are: Part 1: Measurements common to terrestrial radio-relay systems and satellite earth stations; Part 2: Measurements on terrestrial radio-relay systems. Some
9、of the many Sections of the three Parts have appeared under the number BS7573, of the same generic title. When using this BritishStandard, reference is required to BS EN60835-1-1.2, BS EN60835-1-1.3 and BS EN60835-1-3.9. This Section of BS EN60835 covers methods of measurement on service channel equ
10、ipment using Single-Channel-Per-Carrier, Phase-Shift-Keying, (SCPC-PSK) terminals. The measurements are applicable to service channel equipment with voice interface. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible
11、for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references Publication referred to Corresponding BritishStandard BS EN60835 Methods of measurement for equipment used in digital microwave radio transmission systems Par
12、t1 Measurements common to terrestrial radio-relay systems and satellite earth stations EN60835-1-2:1993 (IEC835-1-2:1992) Section1.2:1995 Basic characteristics EN60835-1-3:1995 (IEC835-1-3:1992) Section1.3:1995 Transmission characteristics EN60835-3-9:1995 (IEC835-3-9:1993) Part3 Measurements on sat
13、ellite earth stations Section3.9:1995 Terminal equipment SCPC-PSK Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theEN title page, pages2 to6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had ame
14、ndments incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN60835-3-11 April 1995 ICS 33.060.30 Descriptors: Telecommunications,radiocommunications, communication equipment, earth stations, microwave frequencies, d
15、igital technics, measurements, characteristics English version Methods of measurement for equipment used in digital microwave radio transmission systems Part3: Measurements on satellite earth stations Section11: Service channel equipment for SCPC-PSK transmission (IEC835-3-11:1995) Mthodes de mesure
16、 applicables au matriel utilis pour les systmes de transmission numrique en hyperfrquence Partie3: Mesures applicables aux stations terriennes de tlcommunications par satellite Section11: Equipement de voie de service pour transmission (SCPC-MDP) (CEI835-3-11:1995) Meverfahren fr Gerte in digitalen
17、Mikrowellen-Funkbertragungssystemen Teil3: Messungen an Satelliten-Erdfunkstellen Hauptabschnitt11: Dienstkanaleinrichtungen fr SCPC-PSK-bertragung (IEC835-3-11:1995) This European Standard was approved by CENELEC on1995-03-06. CENELEC members are bound to comply with the CEN/CENELEC Internal Regula
18、tions 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 Central Secretariat or to any CENELEC member. This
19、 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 Central Secretariat has the same status as the official versions. CENELEC members
20、 are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europ
21、en de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1995 Copyright reserved to CENELEC members Ref.No.EN60835-3-11:1995EEN60835-3-11:1995 BSI 01-2000 2 Foreword The text of document12E(CO)170, future edition1
22、of IEC835-3-11, prepared by SC12E, Radio-relay and fixed satellite communication systems, of IECTC12, Radio-communications, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN60835-3-11 on1995-03-06. The following dates were fixed: Annexes designated “normative” are part
23、 of the body of the standard. In this standard, Annex ZA is normative. Annex ZA has been added by CENELEC. latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop)1996-03-01 latest date by which the national standard
24、s conflicting with the EN haveto be withdrawn (dow)1996-03-01EN60835-3-11:1995 BSI 01-2000 3 1 Scope This section of IEC835-3 deals with measurements carried out on service channel equipment utilizing SCPC-PSK (single-channel-per-carrier, phase-shift-keying) terminals. The measurements described are
25、 applicable to service channel equipment with voice interface. Measurements on service channel frequency control systems are not included. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this section of IEC83
26、5-3. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this section of IEC835-3 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated bel
27、ow. Members of IEC and ISO maintain registers of currently valid International Standards. IEC835-1-2:1992, Methods of measurement for equipment used in digital microwave radio transmission systems Part1: Measurements common to terrestrial radio-relay systems and satellite earth stations Section2: Ba
28、sic characteristics. IEC835-1-3:1992, Methods of measurement for equipment used in digital microwave radio transmission systems Part1: Measurements common to terrestrial radio-relay systems and satellite earth stations Section3: Transmission characteristics. IEC835-3-9:1993, Methods of measurement f
29、or equipment used in digital microwave radio transmission systems Part3: Measurements on satellite earth stations Section9: Terminal equipment SCPC-PSK. 3 General considerations Service channels, also known as engineering service circuits (ESC), are provided for communication between earth station p
30、ersonnel to facilitate the operation, maintenance and management of the satellite earth station network. At earth stations operating with SCPC, two channel units providing two pairs of frequencies, as described in IEC835-3-9, are normally assigned for duplex transmission. The utilization of these fr
31、equency pairs for the transmission of different kinds of calls such as station-to-station calls, station-to-operation centre calls, broadcast (point-to-multipoint) calls, depends on the applied service channel transmission system, and differs in the individual satellite networks (Intelsat, Arabsat,
32、Intersputniketc.). Similar differences exist in the applied signalling systems, available priority levels, and type of services available (telephone, telegraph, data, etc.). In view of these differences, functional tests applicable to the specific system applied shall normally be carried out for the
33、 characterization of the service channel equipment to be tested. In addition, performance tests can also be carried out whenever suitable interface test points are available. 4 Measurement method 4.1 Functional tests In order to carry out the functional tests on the service channel equipment under t
34、est, measuring equipment intended to simulate the equipment at the distant earth station is required. Previously tested service channel equipment may also be used as the measuring equipment. The equipment under test and measuring equipment shall be interconnected with their associated channel units
35、as during actual operation, and the functional tests shall be carried out following the terminal equipment tests. These latter are given in IEC835-3-9, by setting up an i.f.loop-back connection. According to the test arrangement shown in Figure 1, a service channel connection in the SEND direction i
36、s established from the equipment under test to the measuring equipment, and in the RECEIVE direction from the measuring equipment to the equipment under test. NOTEIf it is required to test the service channel equipment under the worst case conditions, an i.f.noise source should be inserted into the
37、i.f.loop RECEIVE path to simulate the noise generated in the satellite uplink/downlink paths. After setting up this test arrangement, the following functional tests shall be carried out. Initiate a call from the equipment under test (SEND direction) by dialling the number assigned to the measuring e
38、quipment, and from the measuring equipment (RECEIVE direction) by dialling the number assigned to the equipment under test. Verify that connection with the called equipment has been established. Verify also that no connection is established by dialling a number assigned to a third equipment. Repeat
39、the above for different call types such as station-to-station calls, broadcast calls, etc., as applicable.EN60835-3-11:1995 4 BSI 01-2000 Following call initiation, verify audible and/or visual signalling, as appropriate, both for an established connection and for a simulated busy condition. Verify
40、that no unwanted call interruption has occurred over an extended time-span. During an established telephone connection, evaluate the intelligibility of the telephone conversation. During an established telegraph connection, evaluate the erroneous characters in the received telegraph message by sendi
41、ng standardized text (such as “the quick brown fox jumps over the lazy dog”). Verify operation under priority conditions, if applicable, by observing the disconnection of a previously established lower priority call, and the through connection of a higher priority call. Following call termination, v
42、erify the return to the idle state by observing the signalling information. Note that the preceding functional tests will implicitly include the checking of the channel unit synthesizer frequency control by the service channel equipment (the interchanging of transmit and receive frequencies when pla
43、cing a station-to-station call) and also the channel transmitter enable/disable control by the service channel equipment conditions (during transmission/reception only or idle state). 4.2 Performance tests The arrangement shown in Figure 1is primarily used for functional tests but can also be applie
44、d to carry out additional performance tests whenever suitable interface test points are available. The following is a list of performance parameters which can be measured on the service channel equipment used for telephone transmission: insertion loss; frequency response; non-linear distortion; psop
45、hometric noise; spurious tones. Measurement methods for these parameters are given in IEC835-1-2 and IEC835-1-3. Additional parameters such as signalling level, cross-talk attenuation between two directions of transmission, dial pulse parameters, etc.can also be measured if appropriate. Measurement
46、of telegraph parameters may also be required but are beyond the scope of this standard. 5 Presentation of results For each functional test, results shall be presented as a simple pass/fail test record. For each performance test, results shall be presented as given in the relevant clauses of IEC835-1
47、-2 and IEC835-1-3. 6 Details to be specified a) Listing of the functional tests to be performed. b) Listing of the performance tests to be performed (if applicable), together with specified limit values.EN 60835-3-11:1995 BSI 01-2000 5 NOTEIf the channel unit i.f.output and input frequencies and/or
48、levels are not identical, then suitable interface equipment is also required in the i.f.loop connection. Figure 1 Set-up for testing service channel equipment6 blankBSEN60835-3-11:1996 BSI 01-2000 List of references Seenational foreword.BS EN 60835-3-11: 1996 BS7573-3.11: 1996 IEC835-3-11: 1995 BSI
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