1、 CENELEC EN*b0835- 3-33 95 I 3404583 0370073 664 I BRITISH STANDARD 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 Standard EN 608
2、35-3-11 : 1995 has the status of a British Standard 1CS 33.060.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 1996 BS 7573 : Section 3.11 : 1996 1995 60835-3-11 : IEC 835-3-11 : CENELEC ENwb0835- 3-11 75 3Y04.583 017007Lt 9TO m BS EN 60835-3-11 : 1996 Committees resp
3、onsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee EPU12, Radio communication, upon which the following bodies were represented British Broadcasting Corporation British Radio and Electronic Equipment Manufactures Association British Teleco
4、mmunications plc ERA Technology Ltd. Institution of Electrical Engineers Radio, Electrical and Television Retailers Association Radiocommunications Agency This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the St
5、andards Board and comes into effect on 15 March 1996 O BSI 1996 Amendments issued since publication Amd. No. Date I Text affected The following ES1 references relate to the work on this standard Committee reference EPW12 Draft for comment 9Y2.10410 DC ISBN O 580 25261 2 CENELEC EN+b0835- 3-11 95 340
6、4583 0170075 837 m BS EN 608353-11 : 1996 Contents Committees responsible National foreword Page Inside front cover u Foreword 2 1 Scope 3 2 Normative references 3 3 General considerations 3 4 Measurement method 4 5 Presentation of results 5 6 Details to be specified 5 Figure 1 Set-up for testing se
7、rvice channel equipment 6 D BSI 1996 i CENELEC ENwb0835- 3-11 95 I 3404583 OL7007b 773 m BS EN 60835-3-11 : 1996 National foreword This British Standard has been prepared by Technical Committee EPU12 and is the English language version of EN 60835-3-11 : 1995 Methods of measurement for equipment use
8、d in digital microwave radio transmisswn systems Part 3 Measurements on satellite earth stations Section 11: Sernuice channel equipment for SCPC-PSK transmission, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC 835-3-11 : 1995, published b
9、y the International Electrotechnical Commission (IEC). BS EN 60835 is published in three Pasts. The other Pasts are: Part 1 Measurements common to terrest?=ial radio-relay systems and satellite earth stations Part 2 Measurements on terrastrial radio-relay systems Some of the many Sections of the thr
10、ee Parts have appeared under the number BS 7573, of the same generic title. When using this British Standard, reference is required to BS EN 60835 : Part 1 : Sections 1.2, 1.3 and 3.9. This Section of BS EN 60835 covers methods of measurement on service channel equipment using Single-Channel-Per-Car
11、rier, Phase-Shift-Keying, (SCPC-PSK) terminals. The measurements are applicable to service channel equipment with voice interface. Cross-references Publication referred to EN 608351-2 : 1993 (IEC 8351-2 : 1992) EN 60835-13 : 1995 (IEC 835-13 : 1992) EN 608353-9 : 1995 (IEC 835-3-9 : 1993) Correspond
12、ing British Standard BS EN 60835 Methods of measurement for equipment used in digital microwave radio transmission systems Part 1 Measurments common to terrestrial radio-relay systems and satellite earth stations Section 1.2 : 1995 Basic chamternsties Section 1.3 : 1995 Transmission chamteristics Pa
13、st 3 Measurements on satellite earth stations Section 3.9 : 1995 Tminal equipmmt SCPC-PSK Compliance with a British Standard does not of itself confer immunity from legal obligations. O BSI 1996 CENELEC EN*b0835- 3-11 75 E 3404583 0170077 bOT E EUROPEAN STANDARD NORNIE EUROPENNE EXJROPMSCHE NORIM EN
14、 60835-3-11 April 1995 ICs 33.060.30 Descriptors: Telecommunications, radiocommunications, communication equipment, earth stations, microwave frequencies, digital technics, measurements, characteristics English version Methods of measurement for equipment used in digital microwave radio transmission
15、 systems Part 3: Measurements on satellite earth stations Section 11. Service channel equipment fer SCPC-PSK transmission (IEC 835-3-11 : 1995) Mthodes de mesure applicables au matriel utilis pour les systmes de transmission numrique en hyperfrquence Partie 3: Mesures applicables aux stations terrie
16、nnes de tlcommunications par satellite Section 11: Equipement de voie de senice pour transmission (SCPC-MDP) Mefiverfahen fr Gerte in digitalen Mikrowellen-Funkbertragungss ystemen Teil 3: Messungen an Satelliten-Erdfunkstellen Hauptabschnit 11: Dienstkanaleinrichtungen fr SCPC-PSK-Ubertragung (IEC
17、835-3-11 : 1995) (CE1 835-3-11 : 1995) This European Standard was approved by CENELEC on 1995-03-06. CENELEC members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
18、 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 European Standard exists in three official versions (English, French, German). A version in any other language made by translat
19、ion 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 are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland,
20、Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fur Elektrotechnische Normung Central Secretariat: rue de Stassart 35,
21、B-1050 Brussels O 1995 Copyright reserved to CENELEC members Ref. No. EN 60835-3-11 : 1995 E CENELEC EN*b0835- 3-LL 75 3404583 03i70078 54b Page 2 EN 60835-11 : 1995 Foreword The text of document 12E(C0)170, future edition 1 of IEC 35-3-11, prepared by SC 12E, Radio-relay and ked satellite communica
22、tion systems, of IEC TC 12, Radio-communications, was submitted to the IEC-CENELEC paraalel vote and was approved by CENELEC as EN 60835-311 on 199503-06. The following dates were fixed - latest date by which the EN has to be implemented at national level by publication of an identical national stan
23、dard or by latest date by which the national standards conflicting with the EN have to be withdrawn endorsement (dop) 1996-03-01 - (dow) 1996-03-01 Annexes designated normative are part of the body of the standard. In this standard, annex ZA is normative. Annex ZA has been added by CENELEC. 0 BS1 19
24、96 CENELEC ENEbO835- 3-11 95 I 3404583 0170079 482 I Page 3 EN 60835-3-11 : 1995 METHODS OF MEASUREMENT FOR EQUIPMENT USED IN DIGITAL MICROWAVE RADIO TRANSMISSION SYSTEMS - Part 3: Measurements on satellite earth stations - Section 11 : Service channel equipment for SCPC-PSK transmission 1 Scope Thi
25、s section of IEC 835-3 deals with measurements carried out on service channel equipment utilizing SCPC-PSK (single-channel-per-carrier, phase-shift-keying) terminals. The measurements described are applicable to service channel equipment with voice inter- face. Measurements on service channel freque
26、ncy 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 IEC 835-3. At the time of publication, the edi- tions indicated were valid. All normative documents are su
27、bject to revision, and parties to agreements based on this section of IEC 835-3 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and IS0 maintain registers of currently valid International St and a rd s. IEC
28、 835-1 -2: 1992, Methods of measurement for equipment used in digital microwave radio transmission systems - Part 7: Measurements common to terrestrial radio-relay systems and satellite earth stations - Section 2: Basic characteristics IEC 835-1 -3: 1992, Methods of measurement for equipment used in
29、 digital microwave radio transmission systems - Part 1: Measurements common to terrestrial radio-relay systems and satellite earth sfations - Section 3: Transmission characteristics IEC 835-3-9: 1993, Methods of measurement for equipment used in digital microwave radio transmission systems - Part 3:
30、 Measurements on satellite earth stations - Section 9: Terminal equipment SCPC-PSK 3 General considerations Service channels, also known as engineering service circuits (ESC), are provided for com- munication between earth station personnel to facilitate the operation, maintenance and management of
31、the satellite earth station network. At earth stations operating with SCPC, two channel units providing two pairs of frequencies, as described in IEC 835-3-9, are normally assigned for duplex transmission. The utilization of these frequency pairs for the transmission of different kinds of calls such
32、 as CENELEC ENmb835- 3-11 75 3404583 0170080 LT4 m Page 4 EN 60835-3-11 : 1995 - station-to-station calls, - station-to-operation centre calls, - broadcast (poin t-to-m ult ipoin t) calls, depends on the applied service channel transmission system, and differs in the individual satellite networks (I
33、ntelsat, Arabsat, Intersputnik etc.). Similar differences exist in the applied signalling systems, available priority levels, and type of services available (tele- phone, telegraph, data, etc.). In view of these differences, functional tests applicable to the specific system applied shall normally b
34、e carried out for the 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 chan
35、nel equipment under test, 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 asso
36、ciated channel units as during actual operation, and the functional tests shall be carried out following the terminal equipment tests. These latter are given in IEC 835-3-9, by setting up an i .f. loop-back connection. According to the test arrangement shown in figure 1, a service channel connection
37、 in the SEND direction is established from the equipment under test to the measuring equipment, and in the RECEIVE direction from the measuring equipment to the equipment under test. NOTE - If it is required to test the service channel equipment under the worst case conditions, an i.f. noise source
38、should be inserted into the i.f. loop RECEIVE path to simulate the noise generated in the satellite uplin Wdownlink 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 num
39、ber assigned to the measuring equipment, and from the measuring equipment (RECEIVE direction) by dialling the number assigned to the equipment under test. Verify that con- nection with the called equipment has been established. Verify also that no connection is established by dialling a number assig
40、ned to a third equipment. - Repeat the above for different call types such as station-to-station calls, broadcast calls, etc., as applicable. - Following call initiation, verify audible and/or visual signalling, as appropriate, both for an established connection and for a simulated busy condition. -
41、 Verify that no unwanted call interruption has occurred over an extended time-span. - phone conversation. During an established telephone connection, evaluate the intelligibility of the tele- CENELEC ENxb0835- 3-11 75 3404583 0170081 030 Page 5 EN 60835-3-11 : 1995 - During an established telegraph
42、connection, evaluate the erroneous characters in the received telegraph message by sending standardized text (such as “the quick brown fox jumps over the lazy dog”). - Verify operation under priority conditions, if applicable, by observing the disconnec- tion of a previously established lower priori
43、ty call, and the through connection of a higher priority call. - Following call termination, verify the return to the idle state by observing the signal- ling information. Note that the preceding functional tests will implicitly include the checking of the channel unit synthesizer frequency control
44、by the service channel equipment (the interchanging of transmit and receive frequencies when placing a station-to-station call) and also the chan- nel transmitter enable/disable control by the service channel equipment conditions (during transmission/reception only or idle state). 4.2 Performance te
45、sts The arrangement shown in figure 1 is primarily used for functional tests but can also be applied 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 equipme
46、nt used for telephone transmission: - insertion loss; - frequency response; - non-linear distortion: - psophometric noise; - spurious tones. Measurement methods for these parameters are given in IEC 835-1-2 and IEC 835-1-3. Additional parameters such as signalling level, cross-talk attenuation betwe
47、en two directions of transmission, dial pulse parameters, etc. can also be measured if appropri- ate. Measurement 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/fa
48、il test record. For each performance test, results shall be presented as given in the relevant clauses of IEC 835-1-2 and IEC 835-1-3. 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 spec
49、ified limit values. CENELEC EN*b0835- 3-11 95 3404583 0370082 T77 - Page 6 EN 60835-3-11 : 1995 BS EN 60835-3-11 1996 List of references See national foreword. O BSI 1996 - CENELEC ENxbO35- 3-LL 75 I 3404583 OL70O4 4T BS EN 1996 BS 7573 : Section 3.11 : 1996 1995 60835-3-11 : IEC 835-3-11 : BSI 389 Chiswick High Road London w4 4AL BSI - British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at
