1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU 0.150 Corrigendum I (05/2002) SERIES O: SPECIFICATIONS OF MEASURING EQUIPMENT Equipment for the measurement of digital and an a I og u e/d ig i ta I param e te rs General requirements for instrumentation for
2、performance measurements on digital transmission equipment Corrigendum 1 ITU-T Recommendation O. 150 - Corrigendum 1 ITU-T O-SERIES RECOMMENDATIONS SPECIFICATIONS OF MEASURING EQUIPMENT General Maintenance access Automatic and semi-automatic measuring systems Equipment for the measurement of analogu
3、e parameters Equipment for the measurement of digital and analogue O. 1-0.9 0.10-0.19 0.20-0.39 0.40-0.129 Lital parameters 0.130-0.199 For further details, please refer to the list of ITU-T Recommendations. ITU-T Recommendation 0.150 General requirements for instrumentation for performance measurem
4、ents on digital transmission equipment Corrigendum 1 Source Corrigendum 1 to ITU-T Recommendation 0.150 was prepared by ITU-T Study Group 4 (2001-2004) and approved under the WTSA Resolution 1 procedure on 29 May 2002. ITU-T Rec. 0.15O/Cor.l (05/2002) i FOREWORD The International Telecommunication U
5、nion (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to
6、 standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations
7、 is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness
8、to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position co
9、ncerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual property, protected by
10、 patents, which may be required to implement this Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. o ITU 2002 All rights reserved. No part of this publication may be reproduced,
11、 by any means whatsoever, without the prior written permission of ITU. 11 ITU-T Rec. 0.15O/Cor.l (05/2002) CONTENTS 1 Introduction 2 Resolved defect . ITU-T Rec . O.lSO/Cor.l (05/2002) Page 1 1 . 111 ITU-T Recommendation 0.150 General requirements for instrumentation for performance measurements on
12、digital transmission equipment Corrigendum 1 1 Introduction The thirdparagraph of 5.Y0.150 (05/96) contains the following text and associated equations: This pseudo-random sequence satisfies the following: QH+i(k+l)= Qn(k), = 42, ., 19, QI (k + 1) = QI 7 (k) (17 and RD(k) = Q20 (k) + (k) . . . 4- (k
13、) In the last row of the equations the second operand Qfi) is indexed incorrectly. The correct operand should read Q19fi). 2 Resolved defect Replace the last row of the equations in 5. 5/0. 150 with the following formula: RD(k) = Q2o (k) + QI 9 (k) + . . . + (k) ITU-T Rec. 0.15O/Cor.l (05/2002) I SE
14、RIES OF ITU-T RECOMMENDATIONS Series A Series B Series C Series D Series E Series F Series G Series H Series I Series J Series K Series L Series M Series N Series O Series P Series Q Series R Series S Series T Series U Series V Series X Series Y Series Z Organization of the work of ITU-T Means of ex
15、pression: definitions, symbols, classification General telecommunication statistics General tariff principles Overall network operation, telephone service, service operation and human factors Non-telephone telecommunication services Transmission systems and media, digital systems and networks Audiov
16、isual and multimedia systems Integrated services digital network Cable networks and transmission of television, sound programme and other multimedia signals Protection against interference Construction, installation and protection of cables and other elements of outside plant TMN and network mainten
17、ance: international transmission systems, telephone circuits, telegraphy, facsimile and leased circuits Maintenance: international sound programme and television transmission circuits Specifications of measuring equipment Telephone transmission quality, telephone installations, local line networks S
18、witching and signalling Telegraph transmission Telegraph services terminal equipment Terminals for telematic services Telegraph switching Data communication over the telephone network Data networks and open system communications Global information infrastructure and Internet protocol aspects Languages and general sofhvare aspects for telecommunication systems Printed in Switzerland Geneva, 2002
