1、ETSI EN 301 126-2-3 1.1.1 (2000-11) European Standard (Telecommunications series) Fixed Radio Systems; Conformance testing; Part 2-3: Poi nt-to-M u I t i poi nt equipment ; Test procedures for TDMA systems 2 ETSI EN 301 126-2-3 V1.l.l (2000-1 1) Reference DEN/TM-04026-2-3 Keywords DRRS, MA, multipoi
2、nt, radio, RLL, SDH, testing, transmission, architecture, TDMA ETSI 650 Route des Lucioles F-O6921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 O0 Fax: +33 4 93 65 47 16 Siret No 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-prfecture de Grasse (06) No 7803/88
3、 Important notice Individual copies of the present document can be downloaded from: htti3:lwww. etsi I oq The present document may be made available in more than one electronic version or in print. In any ase of existina c u perceived difference in contents between such versions, the reference versi
4、on is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of stat
5、us. Information on the current status of this and other ETSI documents is available at If you find errors in the present document, send your comment to: editor etsi.fr Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restric
6、tion extend to reproduction in all media. 8 European Telecommunications Standards Institute 2000. All rights reserved. ETSI 3 ETSI EN 301 126-2-3 V1.l.l (2000-1 1) Contents Intellectual Property Rights 4 Foreword 4 1 2 3 3.1 3.2 3.3 4 4.1 4.1.1 4.2 4.2.1 4.2.2 4.2.3 4.2.4 4.2.5 4.2.6 4.2.7 4.2.8 4.2
7、.9 4.3 4.3.1 4.3.2 4.4 4.4.1 4.4.2 4.4.3 4.4.4 Scope 5 References 5 Definitions. symbols and abbreviations . 6 Definitions 6 Symbols 6 Abbreviations 6 General characteristics 6 Equipment Configuration 7 System Configuration . 8 Transmitter Characteristics 9 Maximum RF Output Power 9 Minimum RF outpu
8、t power (if applicable) 10 Automatic Transmit Power Control (ATPC) . 10 Remote Transmit Power Control (RTPC) . 11 Frequency Accuracy 11 RF spectrum mask 11 Remote Frequency Control . 12 Spectral lines at the symbol rate . 12 Spurious emissions (External) 13 Receiver Characteristics 14 Input Level Ra
9、nge (if applicable) . 14 Spurious emissions . 15 System Characteristics . 15 Dynamic level range 15 BER as a function of receiver input signal level RSL 16 Equipment Background BER 16 Interference sensitivity . 17 4.4.4.1 4.4.4.2 4.4.4.3 Co-channel Interference Sensitivity . 17 Adjacent RF-Channel I
10、nterference Sensitivity . 18 CW Spurious Interference . 20 History . 21 ETSI 4 ETSI EN 301 126-2-3 V1.l.l (2000-1 1) Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any
11、, is publicly available for ETSI members and non-members, and can be found in ETSI SR O00 314: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on
12、 the ETSI Web server ClattD:/www.etsP.c/iDr. Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR O00 314 (or the updates on the ETSI Web server) which are, or ma
13、y be, or may become, essential to the present document. Foreword This European Standard (Telecommunications series) has been produced by ETSI Technical Committee Transmission and Multiplexing (TM). The present document is part 2-3 of a multi-part EN covering the Fixed Radio Systems; Conformance test
14、ing, as identified below: Part 1: “Point-to-Point equipment; Definitions, general requirements and test procedures“; Part 2-1: “Point-to-Multipoint equipment; Definitions and general requirements“; Part 2-2: “Point-to-Multipoint equipment; Test procedures for FDMA systems“; Part 2-3: “Point-to-Multi
15、point equipment; Test procedures for TDMA systems“; Part 2-4: “Point-to-Multipoint equipment; Test procedures for FH-CDMA systems“; Part 2-5: “Point-to-Multipoint equipment; Test procedures for DS-CDMA systems“; Part 3-1: “Point-to-Point antennas; Definitions, general requirements and test procedure
16、s“; Part 3-2: “Point-to-Multipoint antennas; Definitions, general requirements and test procedures“. This part 2-3 of EN 301 126 defines harmonized test methods for the conformity assessment testing of point-to- multipoint fixed radio systems applying time division multiple access method (TDMA). It
17、should be noted that the present document can only be applied in conjunction with part one. The part 2-1 of EN 301 126 defines the conformity assessment testing requirements (definitions and general requirements) for radio specific parameters required directly by the relevant ENETS for point-to-mult
18、ipoint systems. Annex A of that part one contains the suppliers declaration, annex B contains the test report format. It is recommended that where a clarification of a test procedure or an agreed test procedure is required, this should be described on the final page of the test report titled “Additi
19、onal information supplementary to the test report“. National transposition dates Date of adoption of this EN Date of latest announcement of this EN (doa): Date of latest publication of new National Standard or endorsement of this EN (dop/e): Date of withdrawal of any conflicting National Standard (d
20、ow): 24 November 2000 28 February 2001 31 August 2001 31 August 2001 ETSI 5 ETSI EN 301 126-2-3 V1.l.l (2000-1 1) 1 Scope The present document details standardized test procedures for conformance testing of equipment for Point-to-Multipoint (P-MP) digital radio relay systems applying time division m
21、ultiple access method (TDMA). Standardized procedures are required in order to fulfil CEPT/ERC/DEC(97)10 i on the mutual recognition, within CEPT, of the results of conformance tests on equipment carried out in individual CEPT Countries. Furthermore the procedures described in the present document a
22、re relevant to be able to fulfil the conformance assessment procedure described in Chapter II of the R Conformance testing; Part 2-1: Point-to-Multipoint equipment; Definitions and general requirements“. Directive 1999/5/EC of the European Parliament and of the Council of 9 March 1999 on radio equip
23、ment and telecommunications terminal equipment and the mutual recognition of their conformity. 121 131 141 CEPT/ERC/REC 74-01: “Spurious emissions“. 151 EN 60835-1: “Methods of measurement for equipment used in digital microwave radio transmission systems. Part 1: Measurements common to terrestrial
24、radio-relay systems and satellite earth stations“. ETSI 6 ETSI EN 301 126-2-3 V1.l.l (2000-1 1) 3 Definitions, symbols and abbreviations 3.1 Def i n it ions For the purposes of the present document, the terms and definitions given in EN 301 126-2-1 2 apply. 3.2 Symbols For the purposes of the presen
25、t document, the symbols given in EN 301 126-2-1 2 apply. 3.3 Abbreviations For the purposes of the present document, the abbreviations given in EN 301 126-2-1 2 apply. 4 General characteristics Where necessary, for better understanding of the application of test methods, reference is made to EN 6083
26、5-1 5 (Test methods). General remark: Where systems transmitting more than one carrier over the same Tx (Multi carrier TDMA system) all carriers being modulated according to the relevant standard, have to be tested applying for each carrier the test procedures defined for a single carrier solution w
27、here not otherwise stated in the relevant ENETS. ETSI 4.1 E 7 Eq ui pm ent Configuration A D FEEDER - A TRANSMIT B BRANCHING RF FILTER u +-RANSMIlTEE n (3 ETSI EN 301 126-2-3 V1.l.l (2000-1 1) 2 *DEMODULATOR F.twork Node E A RECEIVE B C D 8 RECEIVER n BRANCHING n FEEDER - (*) u RFFILTER 8 i D i Base
28、band interface reference points F/ G c directional antenna o mn id i rec tio na I or sector antenna Y Figure 1 : General System Architecture 4 MODULATOR (3 NO FILTERING INCLUDED Figure 2: RF System Block diagram ETSI 8 ETSI EN 301 126-2-3 V1.l.l (2000-1 1) 4.1 .I System Configuration P-MP equipment
29、is designed to operate as an access system connected to a network node (e.g. local switch) and user terminal equipments (figure 1). The individual conformance tests are made in a single link direction (figure 2) but for certain tests, e.g. for equipment to set up signalling, both forward and reverse
30、 links have to operate, the minimum equipment arrangement for tests with only one subscriber is shown in figure 3, where the forward and return RF paths are separated by a pair of duplexers and separate attenuators are inserted in each path. In the absence of any more specific instructions from the
31、supplier it is suggested that the links are operated at threshold (RSL) + n dB where n is half of the link dynamic range except when the receiver is being tested. The other receiver(s) should continue to be operated at threshold (RSL) + n dB. Calibrated splitters or directional couplers will be inse
32、rted at points A, B, C and D (figures 3 and 4) as required for the individual tests, either to provide test points or sources of interfering signals. error rate testers, call generators etc. as required CRS transmit path Attenuator * 1 Attenuator C D TS transmit path it Pattern Generators, bit NOTE:
33、 TDD systems may only require a single path with one attenuator. Figure 3: Test configuration for a single Terminal Station NOTE 1: Calibrated splitters or directional couplers will be inserted at points A, B, C and D as required for the individual tests, either as test points or as sources of inter
34、fering signals. NOTE 2: When measuring the TS transmitter to demonstrate that it meets the emission mask and spurious emissions limits, the splitter network will have only one TS connected and this network may be removed. NOTE 3: The P-MP systems to be tested are duplex systems and features such as
35、time/fi-equency synchronization and ATPC require both paths to be functioning correctly. To ensure that the results of measurements on either the forward or return paths, e.g. receiver RSL, are not influenced by conditions in the other path it may be necessary to provide lower attenuation, or raise
36、the transmitter power, in this other path. In the absence of any more specific instructions fi-om the supplier it is suggested that this other path is operated at threshold (RSL) + n dB. All the test procedures, presented in the following subclauses, shall apply to both CRS(s) and TS(s). Unless othe
37、rwise stated, all essential requirements (ER) tests shall be undertaken at the nominal and extremes of power supply and environmental parameters and at maximum output power. RF power, spectrum and frequency measurements shall be undertaken at low, medium and high frequencies within the declared rang
38、e of frequencies. These RF frequencies may be selected by remote control or otherwise. ETSI 9 ETSI EN 301 126-2-3 V1.l.l (2000-1 1) Central or remote stations incorporating integral antennas shall be provided with an appropriate coaxial or waveguide transition by the supplier in order to facilitate
39、the measurements described. For tests where the simultaneous use of several TSs is necessary, then an arrangement similar to that shown in figure 4 is required. To enable communication, the traffic load may be simulated and facilities such as remote loop back may be used to route traffic through the
40、 system. This arrangement ensures that the system operates in a normal manner similar to its configuration for measurements such as transmitter mask and RSL. Interface unit 4 CRS Bit Pattern Generators, bit error rate testers, call generators etc. as required 4: lexer CRS transmit path i- ! ttenuato
41、r C D TS transmit path e * . i N way 4 splitter network including attenuators etc. if equired for isolation between TSs Bit Pattern Generators, bit error rate testers, call NOTE: TDD systems may only require a single path with one attenuator. Figure 4: Test Configuration for multiple Terminal Statio
42、ns 4.2 Transmitter Characteristics 4.2.1 Maximum RF Output Power Obiective: Verify that the highest average RF output power measured during a transmission burst at reference point B or C (figure 5) is within the suppliers declared value, plus/minus the ENETS tolerance, and does not exceed the ENETS
43、maximum value. For the CRS this may be done using a power meter with all time slots transmitting at maximum power. For the TS this may be done by synchronizing the power measurement with the active burst(s) or correcting the power with a correction due to the on/off duty cycle. Test instruments: Ave
44、rage Power Meter with a time gating function or an appropriate alternate. ETSI 10 Test Configuration: ETSI EN 301 126-2-3 V1.l.l (2000-1 1) Z FIE Modulator rwx Transmitter (branching) Figure 5: Test configuration for maximum RF output power Test Procedure: With the transmitter power level set to max
45、imum, including ATPC/RTPC, etc, the maximum output power of the transmitter at point B (C) during the worst case, as declared by the supplier, of the modulated transmission burst is measured. To make this measurement an average power meter with a time gating function or an appropriate alternate shal
46、l be used. All systems should be tested at 3 frequencies: top, middle and bottom frequencies of the available range. A power splitter or coupler may be required if the TS requires an RF link from the CRS before it can operate. 4.2.2 Minimum RF output power (if applicable) Obiective: Verify that the
47、minimum RF output power measured at reference point B or C of equipment which is fitted with a power control facility is within the specified limit of the declared value. Test Instruments: Average Power Meter with a time gating function or an appropriate alternate. Test Configuration: As for maximum
48、 power test. Test Procedure: With the transmitter power level set to minimum the transmitter output at B (C) is to be measured. All systems should be tested at 3 frequencies: top, middle and bottom frequencies of the available range. 4.2.3 Automatic Transmit Power Control (ATPC) ATPC is an optional
49、feature. However, when fitted and required by the standard, the minimum and maximum output power levels shall be checked. In addition, satisfactory operation of the automatic facility shall be demonstrated. Obiective: When ATPC is implemented, the control loop is to be checked for satisfactory operation Le.: Tx output power is related to the input level at the far end receiver. Test Instruments: As for maximum power test. Test Configuration: To be declared by the supplier. Test Procedure: Throughout the transmitters selected power range, the re
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