1、 ETSI TR 101 953-2-2 V1.1.1 (2004-07)Technical Report Access network xDSL transmission filters;Part 2: VDSL splitters for European deployment;Sub-part 2: Specification of Testing methodsfor high pass part of VDSL/POTS splittersETSI ETSI TR 101 953-2-2 V1.1.1 (2004-07) 2 Reference DTR/TM-06027-2-2 Ke
2、ywords ADSL, ISDN, splitter, testing, POTS, VDSL, xDSL ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important
3、 notice Individual copies of the present document can be downloaded from: http:/www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Por
4、table 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 status. Informati
5、on on the current status of this and other ETSI documents is available at http:/portal.etsi.org/tb/status/status.asp If you find errors in the present document, send your comment to: editoretsi.org Copyright Notification No part may be reproduced except as authorized by written permission. The copyr
6、ight and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2004. All rights reserved. DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registered for the benefit of its Members. TIPHONTMand the TIPHON logo are Trade Marks currently b
7、eing registered by ETSI for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. ETSI ETSI TR 101 953-2-2 V1.1.1 (2004-07) 3 Contents Intellectual Property Rights4 Foreword.4 1 Scope 5 2 References 5 3 Definitio
8、ns and abbreviations.6 3.1 Definitions6 3.2 Abbreviations .6 4 Introduction 6 5 Test conditions and general notes 7 6 List of test cases for the low pass part of the VDSL over POTS splitter .8 6.1 Insertion Loss Requirements for Options A, B and C 8 6.2 Unbalance about earth requirements for options
9、 B and C12 6.2.1 Unbalance about earth requirements for options B and C without DC feeding12 6.2.2 Unbalance about earth requirements for options B and C with DC feeding.13 History 14 ETSI ETSI TR 101 953-2-2 V1.1.1 (2004-07) 4 Intellectual Property Rights IPRs essential or potentially essential to
10、the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ET
11、SI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/webapp.etsi.org/IPR/home.asp). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given
12、 as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Technical Report (TR) has been produced by ETSI Technical Committee Transmission and Multiplexing (TM) as
13、 collaboration between: AT Analogue of Technical Committee Access and Terminals (AT); and TM6 of Technical Committee Transmission and Multiplexing (TM). The present document is part 2, sub-part 2 of a multi-part deliverable supporting different aspects of European Specific DSL splitters, as identifi
14、ed below: Part 1: “ADSL splitters for European deployment“; Part 2: “VDSL splitters for European deployment“: Sub-part 1: “Specification of Testing methods for the low pass part of VDSL/POTS splitters“; Sub-part 2: “Specification of Testing methods for high pass part of VDSL/POTS splitter“; Sub-part
15、 3: “Specification of Testing methods for VDSL/ISDN splitters“. NOTE: The choice of a multi-part format for this deliverable is to facilitate maintenance and future enhancements. ETSI ETSI TR 101 953-2-2 V1.1.1 (2004-07) 5 1 Scope The present document describes test methods for the high pass section
16、 of VDSL/POTS splitters. These splitters are intended to be installed at the Local Exchange side of the local loop and at the user side near the NTP. In the case of splitters at the user side, the present document describes test methods for the master splitter that is intended for use at the demarca
17、tion point of the customer premises. Distributed filters are outside the scope of the present document. NOTE 1: At some locations in the present document impedances values are listed. These values might differ from the values listed in the requirement specifications TS 101 952-2-2 2. If the values d
18、iffer the values of TS 101 952-2-2 2 have to be used. NOTE 2: At some locations in the present document measurements are only shown for splitters at the user side. E.g. this is the case in figure 3. When measuring a splitter at the Local Exchange side the position of the Feeding bridge and the Holdi
19、ng Circuit have to be exchanged. NOTE 3: Remark, that in the present state of TS 101 270 1 the use of distributed filters is not applicable for VDSL-over-POTS. 2 References For the purposes of this Technical Report (TR) the following references apply: 1 ETSI TS 101 270 (all parts): “Transmission and
20、 Multiplexing (TM); Access transmission systems on metallic access cables; Very high speed Digital Subscriber Line (VDSL)“. 2 ETSI TS 101 952-2-2: “Access network xDSL transmission filters; Part 2: VDSL splitters for European deployment; Sub-part 2: Specification of the high pass part of VDSL/POTS s
21、plitters for use at the Local Exchange (LE) and the user side near the Network Termination Point (NTP)“. 3 ETSI TS 101 952-2-1: “Access network xDSL transmission filters; Part 2: VDSL splitters for European deployment; Sub-part 1: Specification of the low pass part of VDSL/POTS splitters“. 4 ETSI TR
22、 101 953-2-1: “Access network xDSL transmission filters; Part 2: VDSL splitters for European deployment; Sub-part 1: Specification of Testing methods for low pass part of VDSL/POTS splitters“. 5 ITU-T Recommendation O.9: “Measuring arrangements to assess the degree of unbalance about earth“. 6 ITU-T
23、 Recommendation O.42: “Equipment to measure non-linear distortion using the 4-tone intermodulation method“. 7 ETSI TBR 038: “Public Switched Telephone Network (PSTN); Attachment requirements for a terminal equipment incorporating an analogue handset function capable of supporting the justified case
24、service when connected to the analogue interface of the PSTN in Europe“. 8 ETSI TBR 021: “Terminal Equipment (TE); Attachment requirements for pan-European approval for connection to the analogue Public Switched Telephone Networks (PSTNs) of TE (excluding TE supporting the voice telephony service) i
25、n which network addressing, if provided, is by means of Dual Tone Multi Frequency (DTMF) signalling“. 9 ETSI EG 201 120: “Public Switched Telephone Network (PSTN); Method of rating terminal equipment so that it can be connected in series and/or in parallel to a Network Termination Point (NTP)“. ETSI
26、 ETSI TR 101 953-2-2 V1.1.1 (2004-07) 6 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: A-wire and B-wire: wires in the 2-wire local loop connection provided from the exchange to the NTP on-hook: state of the POTS e
27、quipment at either end of a POTS loop connection when the NTP terminal equipment is in the quiescent state NOTE: In the case where there are multiple TE present at the customer end of the loop, then only when all of these are on-hook should the CPE be considered to be on hook from the perspective of
28、 testing the splitter. off-hook: state of the POTS equipment at either end of a loop connection when the NTP terminal equipment is in the steady loop state 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: ADSL Asymmetric Digital Subscriber Line CPE Custo
29、mer Premises Equipment DC Direct Current DSL Digital Subscriber Line dBm Absolute power level expressed in decibels relative to 1 mW DUT Device Under Test ISDN Integrated Services Digital Network ITU International Telecommunication Union LE Local Exchange (Central Office) NF Narrow-band Frequency NT
30、P Network Termination Point OP Operational Amplifier POTS Plain Old Telephone Service STF Specialist Task Force TE Terminal Equipment (e.g. Telephone, Fax, voice band modem etc.) VDSL Very high speed Digital Subscriber Line ZRHFReference Termination Impedance for high frequencies (refer to TS 101 95
31、2-2-2 2) 4 Introduction The present document is part 2, sub-part 2 of a multi-part deliverable supporting different aspects of European Specific DSL splitters. It has been produced based on the activities of ETSI STF 248. The present document describes test methods for the high pass part of VDSL/POT
32、S splitters. The test methods of the present document are based on requirements of the following document: TS 101 952-2-2 2: “Specification of the high pass part of VDSL/POTS splitters for use at the Local Exchange (LE) and the user side near the Network Termination Point (NTP)“. Furthermore certain
33、 aspects of the following documents have been considered as to provide a document which is consistent with the specifications of the other sub-parts of TR 101 953: TS 101 952-2-1 3: “Specification of the low pass part of VDSL/POTS Splitters“; TR 101 953-2-1 4: “Specification of Testing methods for t
34、he low pass part of VDSL/POTS splitters“. ETSI ETSI TR 101 953-2-2 V1.1.1 (2004-07) 7 For each test, the document describes: Title of the test. Purpose of the test. Requirement in reference to the specifications. Test configuration. Test set up. Test parameters. Test results matrix. Measuring notes.
35、 5 Test conditions and general notes For some tests feeding bridges and holding circuits are foreseen. For all of these tests, feeding bridge and holding circuit must comply with the requirements as specified in TBR 038 7 with respect to the low frequency range. Similar performance is required for t
36、he high frequency range (up to 12 MHz). An equivalent accuracy may be obtained by calibrating the feeding bridge and holding circuit across the relevant frequency range. UFRFFeeding BridgeAIFDC feedingSignal injectionaabbTest connectionFigure 1: External circuitry for feeding bridge RDCabHoldingCirc
37、uitDCabFigure 2: External circuitry for holding circuit General notes: Polarity of the feeding voltage and with this the direction of the feeding current may impact the additional insertion loss caused by the feeding bridge and holding circuit. A calibration/normalization measurement need to be take
38、n before each single measurement step. ETSI ETSI TR 101 953-2-2 V1.1.1 (2004-07) 8 For active splitters the connection of the DC feeding is essential i.e. for LE splitters the feeding bridge should be connected to the POTS port and the holding circuit should be connected to the LINE port. For TE spl
39、itters the feeding bridge should be connected to the LINE port and the holding circuit should be connected to the POTS port. Test set-ups as given in the present document show TE test set-ups unless stated otherwise. Tests for LE splitter evaluation should be set up considering the aforementioned. T
40、he inaccuracy of the measurement resulting from tolerances in the test set-up and its containing equipment should be carefully considered. When giving a verdict on the test results with respect to the requirement in the related standard this tolerance in the test results need to be taken into accoun
41、t. Before splitters are tested the class of splitter should be categorized. A basis for this could be the schematic of the splitter or a statement of the manufacturer. The following classes have been identified so far in the course of this project: passive: splitters which do exclusively contain pas
42、sive components; passive with current/voltage detection: splitters which perform NF filtering using passive components, which are enhanced by detection circuits based on the DC voltage and/or the DC current; active: splitters which contain active components (like OP) to perform the NF filtering. NOT
43、E: The splitters that have been evaluated during the validation of the test methods described herein are to be classified in cluster “passive“. Although the STF 248 has not had a splitter classified in cluster “passive with current/voltage detection“ at hand for the validation, the experience from S
44、TF 215 allowed to assess the test methods for that type, too. No “active“ splitters could be made available for evaluation. The results of the STF 248 work could be validated for the first two classes, for the third class (active splitters) theoretical test case validations have been discussed. 6 Li
45、st of test cases for the low pass part of the VDSL over POTS splitter 6.1 Insertion Loss Requirements for Options A, B and C Table 1 Test case name: Insertion Loss in the Pass Band (VDSL) Reference: TS 101 952-2-2 2, clause 7.1 Test purpose: To evaluate the Insertion Loss in the Pass Band (VDSL) in
46、when tested with the test parameters as given in the related standards Test configuration: See Test Set-up; DUT not configured ETSI ETSI TR 101 953-2-2 V1.1.1 (2004-07) 9 Test Set-Up for Measuring Direction LINE to VDSL: 60 nF POTS port LINE port Holding Circuit R DC Z open Feeding Bridge A R F I F
47、U F Z Source Us Signal source 60 nF U1 Le vel meter V Z Load 634,5 H VDSL port Z VDSL - M (see note) NOTE: When the calibration measurement is done according to the figure above the influence of the Holding Circuit is not entirely taken into account as ZPOTSis left open. The Holding Circuit should b
48、e checked separately on the influence to ZRHFby measuring ZRHFover the entire frequency band both with and without the Holding Circuit inserted in the measurement. The influence of the Holding Circuit should not lead to a deviation of 0,2 dB which means the Holding Circuit shall have a return loss b
49、etter than 16 dB in the entire frequency band. Figure 3: Test set up for calibration LINE to VDSL Insertion Loss testing on a splitter POTS port LINE port Holding Circuit R DC Z POTS Feeding Bridge A R F I F U F Z Source Us Signal source U2 Level meter V ZLoad634,5 H VDSL port Splitter (DUT) ZVDSL-MFigure 4: Test set up for LINE to VDSL Insertion Loss testing on a splitter ETSI ETSI TR 101 953-2-2 V1.1.1 (2004-07) 10Test Set-Up for Measuring Direction VDSL to LINE: ZLoad POTS port LINE port Holding Circuit R
