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1、IEEE Std 1631-2008 IEEE Recommended Practice for Measurement of 8-VSB Digital Television Transmission Mask Compliance for the USA IEEE 3 Park Avenue New York, NY 10016-5997, USA 9 August 2008 RF Standards Committee G-2.2 Sponsored by the IEEE Broadcast Technology Society 1631 TM Authorized licensed
2、use limited to: IHS Stephanie Dejesus. Downloaded on October 7, 2008 at 11:53 from IEEE Xplore. Restrictions apply. Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEELicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 11/15/20
3、08 20:28:24 MSTNo reproduction or networking permitted without license from IHS -,-,- Authorized licensed use limited to: IHS Stephanie Dejesus. Downloaded on October 7, 2008 at 11:53 from IEEE Xplore. Restrictions apply. Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided
4、 by IHS under license with IEEELicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 11/15/2008 20:28:24 MSTNo reproduction or networking permitted without license from IHS -,-,- IEEE Std 1631TM-2008 IEEE Recommended Practice for Measurement of 8-VSB Digital Television Transmission Mask
5、 Compliance for the USA Sponsor RF Standards Committee G-2.2 of the IEEE Broadcast Technology Society Approved 27 March 2008 IEEE-SA Standards Board Authorized licensed use limited to: IHS Stephanie Dejesus. Downloaded on October 7, 2008 at 11:53 from IEEE Xplore. Restrictions apply. Copyright The I
6、nstitute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEELicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 11/15/2008 20:28:24 MSTNo reproduction or networking permitted without license from IHS -,-,- All figures except Figure 2, Figure 9, Figure
7、 10, Figure 11, and Figure 21 are copyrighted by Linley Gumm, who hereby freely grants permissions for their reuse, asking only that their source be acknowledged. Abstract: This recommended practice provides a standardized body of theory, techniques, and procedures for measuring the spectral charact
8、eristics of 8-VSB transmitters used for terrestrial transmission of digital television (DTV) in the frequency range near their assigned channels. Essential characteristics are specified and measurement procedures are given that ensure that all parties will obtain comparable results. Keywords: 8-VSB,
9、 8-VSB emissions, 500 kHz sub-band, adjacent channel, ATSC digital TV standard, average filter attenuation modeling, band-stop filter, DTV, DTV emissions, FCC emissions compliance, DTV emissions measurement procedure, DTV emissions measurement theory, digital signal intermodulation, emission mask, L
10、PTV DTV transmitter, noise-floor correction, noise bandwidth, pilot frequency offset, simple emission mask, spectrum analyzer, stringent emission mask The Institute of Electrical and Electronics Engineers, Inc. 3 Park Avenue, New York, NY 10016-5997, USA Copyright 2008 by the Institute of Electrical
11、 and Electronics Engineers, Inc. All rights reserved. Published 9 August 2008. Printed in the United States of America. IEEE is a registered trademark in the U.S. Patent +1 978 750 8400. Permission to photocopy portions of any individual standard for educational classroom use can also be obtained th
12、rough the Copyright Clearance Center. Authorized licensed use limited to: IHS Stephanie Dejesus. Downloaded on October 7, 2008 at 11:53 from IEEE Xplore. Restrictions apply. Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEELicensee=IHS Empl
13、oyees/1111111001, User=Japan, IHS Not for Resale, 11/15/2008 20:28:24 MSTNo reproduction or networking permitted without license from IHS -,-,- Introduction This introduction is not part of IEEE Std 1631-2008, IEEE Recommended Practice for Measurement of 8-VSB Digital Transmission Mask Compliance fo
14、r the USA. Overview This recommended practice presents the theory, requirements, and techniques required to obtain accurate and consistent measurements of 8-VSB DTV emissions in the transmitters adjacent channels. It is intended to provide manufacturers, installers, TV station personnel and other co
15、ncerned parties with a standardized body of information for the purpose of determining whether DTV transmission systems are in compliance with the specifications prescribed in the FCC rules. Although the practices within this document apply specifically to the FCCs rules in the United States, the ba
16、ckground theory and the measurement techniques apply to 8-VSB DTV emissions worldwide. History A digital television (DTV) standard was developed for the United States by the Advanced Television Standards Committee (ATSC). In the late 1990s, the FCC adopted the ATSCs transmission standards by incorpo
17、ration (i.e., the ATSCs standards are referred to in the FCCs rules) but adopted its own regulations for DTV transmitter out-of-channel emissions performance. Subsequently, in 2002, discussions between the IEEE Broadcast Technology Society (BTS) and the ATSC resulted in the BTS agreeing to provide a
18、ssistance to develop the methodology required to measure DTV signals. A major driver of the BTSs participation was instances where significantly different results were obtained when measuring the same transmitter. At that time, it was unclear whether the primary problem was variations in the measure
19、ment techniques or in the test equipment. The impact was that there was little certainty whether a given transmitter was in complete compliance with the FCCs rules. Thus, it was important for the BTS to define instrument performance and to codify measurement protocols so that comparable results coul
20、d be obtained by all parties. A Project Authorization Request (PAR) was sponsored by the IEEE BTS to start the project, and the RF Standards Committee G-2.2 was identified as the working group to investigate and develop the necessary information. The in-channel spectrum of the 8-VSB DTV signal is si
21、milar to other digitally modulated radio-frequency (RF) signals. However, the FCCs out-of-channel emission requirements are very severe and are couched in language specific to DTV. This, coupled with the fact that the techniques required to measure the spectrum of a digitally modulated transmitter a
22、re unfamiliar to the broadcast industry, caused significant variations in the results obtained by various observers. Therefore, it was determined by the BTS RF Standards Committee that its initial project would be to develop an 8-VSB emissions measurement recommended practice. The project turned out
23、 to be much more difficult than originally thought, and it has evolved over the past 5 years with significant effort by a dedicated a group of individuals. Two factors made developing the document difficult. The first is that FCCs requirements are very rigorous, pushing the performance of available
24、test equipment to its limits. The second, to obtain that performance, required that the test equipment be carefully configured so the document had to provide sufficient, suitably worded instruction for those unfamiliar with the equipments operation. The committee collected the necessary background t
25、heory and then evaluated the methods and the suitability of the test equipment available for making the measurements. After several field trials and an informal poll of industry members concerning the acceptability of various techniques, a direct measurement technique requiring the use of a band sto
26、p filter in the RF sample path was selected as the primary method. iv Copyright 2008 IEEE. All rights reserved. Authorized licensed use limited to: IHS Stephanie Dejesus. Downloaded on October 7, 2008 at 11:53 from IEEE Xplore. Restrictions apply. Copyright The Institute of Electrical and Electronic
27、s Engineers, Inc. Provided by IHS under license with IEEELicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 11/15/2008 20:28:24 MSTNo reproduction or networking permitted without license from IHS -,-,- Field tests of the consistency of measurements made by different models of test eq
28、uipment as well as of the clarity and understandability of the documents language were made. A verification report was created that documents the measurements made at two transmitters with multiple instruments. This report documents that the goals outlined by this recommended practice were essential
29、ly achieved. This report is available from the BTS G-2.2 RF Standards Committee. The measurement of harmonic emissions was initially included in this document. However, significant obstacles prevented reaching closure on an acceptable and practical means of measuring the harmonics of both existing a
30、nd future transmitters. These obstacles included issues caused by moding of harmonic energy in the transmission line (or wave guide) and associated RF directional coupler characteristics. It was, therefore, decided to proceed with the adjacent channel portion of the emissions document for the indust
31、rys use, whereas the harmonic problem is further considered. It is hoped that as the harmonic emissions measurement problem is resolved, a future amendment can be incorporated into this document. Notice to users Laws and regulations Users of these documents should consult all applicable laws and reg
32、ulations. Compliance with the provisions of this standard does not imply compliance to any applicable regulatory requirements. Implementers of the standard are responsible for observing or referring to the applicable regulatory requirements. IEEE does not, by the publication of its standards, intend
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34、tions, and use in private self- regulation, standardization, and the promotion of engineering practices and methods. By making this document available for use and adoption by public authorities and private users, the IEEE does not waive any rights in copyright to this document. Updating of IEEE docu
35、ments Users of IEEE standards should be aware that these documents may be superseded at any time by the issuance of new editions or may be amended from time to time through the issuance of amendments, corrigenda, or errata. An official IEEE document at any point in time consists of the current editi
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37、p:/ieeexplore.ieee.org/xpl/standards.jsp, or contact the IEEE at the address listed previously. For more information about the IEEE Standards Association or the IEEE standards development process, visit the IEEE-SA Web site at http:/standards.ieee.org. v Copyright 2008 IEEE. All rights reserved. Aut
38、horized licensed use limited to: IHS Stephanie Dejesus. Downloaded on October 7, 2008 at 11:53 from IEEE Xplore. Restrictions apply. Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEELicensee=IHS Employees/1111111001, User=Japan, IHS Not for
39、 Resale, 11/15/2008 20:28:24 MSTNo reproduction or networking permitted without license from IHS -,-,- vi Copyright 2008 IEEE. All rights reserved. Errata Errata, if any, for this and all other standards can be accessed at the following URL: http:/ standards.ieee.org/reading/ieee/updates/errata/inde
40、x.html. Users are encouraged to check this URL for errata periodically. Interpretations Current interpretations can be accessed at the following URL: http:/standards.ieee.org/reading/ieee/interp/ index.html. Patents Attention is called to the possibility that implementation of this standard may requ
41、ire use of subject matter covered by patent rights. By publication of this standard, no position is taken with respect to the existence or validity of any patent rights in connection therewith. The IEEE is not responsible for identifying Essential Patent Claims for which a license may be required, f
42、or conducting inquiries into the legal validity or scope of Patents Claims or determining whether any licensing terms or conditions provided in connection with submission of a Letter of Assurance, if any, or in any licensing agreements are reasonable or non-discriminatory. Users of this standard are
43、 expressly advised that determination of the validity of any patent rights, and the risk of infringement of such rights, is entirely their own responsibility. Further information may be obtained from the IEEE Standards Association. Participants At the time this standard was submitted to the IEEE-SA
44、Standards Board for approval, the DTV Transmission Working Group had the following membership: Gregory Best, Chair Gary Sgrignoli, Vice Chair Linley Gumm, Technical Editor Daniel G. Baker John Freberg Robert Symons Dennis A. Vigil In addition to the people listed above, the following individuals mad
45、e significant contributions to the document during its development: Ron Chase Henry Downs Dan Fallon William Hayes Brett Jenkins H. Douglas Lung Steve Martin Lanny Nass Robert Plonka Joe Seccia Derek Small Paul Smith Authorized licensed use limited to: IHS Stephanie Dejesus. Downloaded on October 7,
46、 2008 at 11:53 from IEEE Xplore. Restrictions apply. Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEELicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 11/15/2008 20:28:24 MSTNo reproduction or networking permitted without
47、license from IHS -,-,- The following members of the individual balloting committee voted on this standard. Balloters may have voted for approval, disapproval, or abstention. Art Allison Daniel G. Baker Gregory Best Dane Ericksen H. Douglas Lung Edward McCall Michael S. Newman Robert Symons Dennis A.
48、 Vigil Dennis W. Wallace S. Merrill Weiss Ronald Zborowski Jim Zook When the IEEE-SA Standards Board approved this standard on 27 March 2008, it had the following membership: Robert M. Grow, Chair Thomas A. Prevost, Vice Chair Steve M. Mills, Past Chair Judith Gorman, Secretary Victor Berman Richard DeBlasio Andrew Drozd Mark Epstein Alex Gelman William R. Goldbach Arnold M. Greenspan Kenneth S. Hanus James Hughes Richard H. Hulett Young Kyun Kim Joseph L. Koepfinger* John Kulick David J. Law Glenn Parsons Ronald C. Petersen Narayanan R