1、 TIA STANDARD Telecommunications Telephone Terminal Equipment Handset Magnetic Measurement Procedures and Performance Requirements TIA-1083 March 2007 TELECOMMUNICATIONS INDUSTRY ASSOCIATION Representing the telecommunications industry in association with the Electronic Industries Alliance ANSI/TI A
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7、ore its use. (From Standards Proposal No. 3-0219, formulated under the cognizance of the TIA, TR-41 User Premises Telecommunications Requirements. TR-41.3 Subcommittee on Analog and Digital Wireline Terminals). Published by TELECOMMUNICATIONS INDUSTRY ASSOCIATION Standards and Technology Department
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25、tworking permitted without license from IHS-,-,-TIA-1083 TABLE OF CONTENTS FOREWORD_ III 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 INTRODUCTION_ V 1. SCOPE_ 1 2. ABBREVIATIONS, ACRONYMS, AND DEFINITIONS _ 2 2.1. ABBREVIATIONS AND ACRONYMS _ 2 2.2. DEFINITIONS_ 2 3. HANDSET
26、 MAGNETIC PERFORMANCE REQUIREMENTS _ 5 3.1. CATEGORIES OF CRITERIA _ 5 3.2. PERPENDICULAR ORIENTATION _ 5 3.2.1. Requirement _ 5 3.2.2. Method of Measurement_ 5 3.3. TRANSVERSE ORIENTATION _ 10 3.3.1. Requirement _ 10 3.3.2. Method of Measurement_ 10 ANNEX A (NORMATIVE) HALF-BAND INTEGRATOR _ 15 ANN
27、EX B (INFORMATIVE) BIBLIOGRAPHY _ 16 ANNEX C (INFORMATIVE) CORRELATION DATA_ 17 ANNEX D (INFORMATIVE) CORDLESS PHONE/HEARING AID TELECOIL MODE SIGNAL-TO-NOISE STUDY _ 24 D.1 INTRODUCTION _ 24 D.2 TEST SIGNALS, EQUIPMENT, AND SETUP _ 25 D.3 EXPERIMENTAL PROCEDURE _ 29 D.4 TEST RESULTS _ 31 D.5 CONCLU
28、SIONS _ 34 D.6 REFERENCES_ 34 D.7 ACKNOWLEDGEMENTS_ 34 i Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA-1083 Table of Figures Figure 1 Reference and Measurement Planes and
29、Reference Axis4 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 Figure 2 Perpendicular Measurement Position Area (Not to scale).7 Figure 3 Induced Voltage Frequency Response ( -22 dB(A/m).8 Figure 4 Induced Voltage Frequency Response ( -19 dB(A/m).9 Figure 5 Transverse Measurement Pos
30、ition Area 12 Figure 6 Test Setup 13 Figure 7 Feeding Bridge and Matching Pad Circuit 14 Figure A.1 Half-Band Integrator Response .15 Figure C.1 Correlation of Interference Rating to A-Weighted Noise Level21 Figure C.2 Percentage of Interference Ratings vs A-Weighted Noise Level.22 Figure C.3 Averag
31、e Score vs. Noise (dB(A/m)23 Figure D.1 ITU-T P.830 Modified IRS Send Characteristics26 Figure D.2 Typical Magnetic Source Frequency Response vs Requirement.27 Figure D.3 Minimum S/N for a “Normal Use” Rating 32 Figure D.4 Signal-to-Noise vs. “Normal Use” S/N Ratios 33 Table of Tables Table 1 Induce
32、d Voltage Frequency Response Limits ( -22 dB(A/m).8 Table 2 Induced Voltage Frequency Response Limits ( -19 dB(A/m).9 Table A.1 Half-Band Integrator Response.15 Table C.1 Correlation Coefficients 20 Table C.2 Average Score vs. Noise (dB(A/m) .23 Table D.1 Test Stimuli.26 ii Copyright Telecommunicati
33、ons Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA-1083 FOREWORD (This foreword is not part of this Standard.) This document is a TIA Telecommunications standard produced by Subcommittee TR-41.3 of Com
34、mittee TR-41. This standard was developed in accordance with TIA procedural guidelines, and represents the consensus position of the Subcommittee, which served as the formulating group. There are four annexes in this Standard. Annex A is normative and is considered part of this Standard; Annex B, An
35、nex C and Annex D are informative and are not considered part of this Standard. The TR-41.3 Subcommittee acknowledges the contributions made by the following individuals in the development of this standard. Name Representing James Bress (Chair) AST Technology Labs, Inc Al Baum (Vice-Chair, Editor) U
36、niden Don McKinnon AST Technology Labs, Inc Stephen Julstrom Etymotic Research Linda Kozma-Spytek Gallaudet University Robert Wegner Panasonic Corporation of North America David Preves Starkey Laboratories Weili Lin Starkey Laboratories Steve Kropp VTech Steve Whitesell VTech The TR-41.3 Subcommitte
37、e acknowledges the participation by the following individuals in the development of this standard. Name Representing Dave Stenner Advent Instruments Inc. Amaud Vergnol Alcatel USA Don McKinnon AST Technology Labs, Inc. James Bress AST Technology Labs, Inc. Joanne McMillen Avaya Joachim Pomy Avaya Ki
38、rit Patel Cisco Tim Lawler Cisco Harry Van Zandt ECS Technologies Stephen Julstrom Etymotic Research iii Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA-1083 Martin Perrine
39、FCC Judy Harkins Gallaudet University Linda Kozma-Spytek Gallaudet University Gunnar Rasmussen GRAS Ed Terrell GRAS Brenda Battat HLAA Matthew Mulvihill Industry Canada Christina Gallagher Industry Canada Neil King Infineon Ken Macdonald Microtronix Greg Slingerland Mitel Networks Roger Britt Nortel
40、 Robert Wegner Panasonic Steve Fujimoto Panasonic Tony Jasionowski Panasonic Allen Woo Plantronics Steve Graham Plantronics Amar Ray Embarq David Preves Starkey Laboratories Weili Lin Starkey Laboratories Steve Hanke Starkey Laboratories Roger Hunt Thomson Inc. Al Baum Uniden Steve Kropp VTech Steve
41、 Whitesell VTech Trone Bishop Verizon Jim Smith Wyle Labs Suggestions for improvement of this standard are welcome. They should be sent to: Telecommunications Industry Association Engineering Department Suite 300 250 Wilson Boulevard Arlington, VA 22201 ( http:/www.tiaonline.org ) iv Copyright Telec
42、ommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA-1083 INTRODUCTION In 2004, telephone manufacturers began to receive customer complaints regarding hearing aid interference problems with dig
43、ital cordless telephones. At its August 2004 meeting, TIA TR41.3 sub-committee discussed a Gallaudet University presentation on the subject and possible causes for the reported interference. The consensus belief was that, due to the low RF power levels used by cordless phones, the source of the repo
44、rted interference was possibly magnetic. Further work towards confirming this belief and developing a testing method to characterize the magnetic interference was conducted during the remainder of 2004 and first half of 2005. This effort culminated with round robin tests being made on a number of cordless telephones by three different laboratories and then correlated with the subjective test results from a study conducted by Gallaudet University during the 2005 Convention of Self Help for Hard of Hearing People (SHHH) as documented in A
