1、INTERNATIONALSTANDARDIEC60489-11983AMENDMENT 21999-05Amendment 2Methods of measurement for radio equipmentused in the mobile services Part 1:General definitions and standard conditionsof measurementAmendement 2Mthodes de mesure applicablesau matriel de radiocommunicationutilis dans les services mobi
2、les Partie 1:Dfinitions gnrales et conditionsnormales de mesurePRICE CODE IEC 1999 Copyright-all rights reservedInternational Electrotechnical Commission3,rue de Varemb Geneva,SwitzerlandTelefax:+41 22 919 0300e-mail:inmailiec.ch IEC web site http:/www.iec.chXAFor price,see current catalogue Commiss
3、ion Electrotechnique Internationale International Electrotechnical CommissionLICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 60489-1 Amend.2 IEC:1999(E)FOREWORDThis amendment has been prepared by IEC technical committee 102:Equipment
4、 used in radiocommunications for mobile services and for satellite communication systems.The text of this amendment is based onFDISReport on voting102/41/FDIS102/49/RVDFull information on the voting for the approval of this amendment can be found in the report onvoting indicated in the above table.A
5、 bilingual version of this amendment may be issued at a later date._Add the following reference to the list of Other IEC publications quoted in this standard:IEC 60489-8:1984,Methods of measurement for radio equipment used in the mobile services Part 8:AntennasPage 54Add the following Annex A after
6、figure 3.Annex A(normative)Guide for the use of test sites and radio-frequencycoupling devices(RFCDs)A.1 GeneralTest sites are basic means to perform radiation measurements.Radio-frequency couplingdevices(RFCDs)are means generally designed to perform many equipment radiationmeasurements economically
7、,using the same measuring method as equipment with antennaterminals.This annex describes low reflection test sites(LRTS)and anechoic chambers(AC)for upperfrequency limit extension and interference-free measurements,as well as random fieldmeasurement sites for measurements similar in the real field a
8、nd for measurement equipmentwith a diversity antenna.TEM cells and GTEM cells are also described for wideband upper-frequency limit extension and interference-free measurements.The evaluation measurement of a test site is the method to judge whether a test siteconstruction satisfies the required con
9、ditions and is introduced for LRTS,AC and RFM sites inthis annex.The evaluation measurement for OATS was studied,but not introduced becausethe available evaluation measurement required important measurement condition changes.LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATIO
10、N ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.60489-1 Amend.2 IEC:1999(E)3 The calibration method for a test site is the process for determining the numerical relationshipbetween equipment radiation power and the observed output of a radio-frequency signalgenerator which replaces the EUT during the substitu
11、tion measurement,or the numericalrelationship between the field strength where the EUT is placed and the indication of theselective measuring device with the calibration antenna.RFCDs were originally used only for ratio measurement of equipment receiving radio-frequencyelectromagnetic energy.The rad
12、iation sensitivity measured in the RFCD was called thereference sensitivity(RFCD)and defined as the level of RFCD input signal in microvolts(V).This annex also describes calibration methods.Calibration is the procedure for determining thenumerical relationship between RFCD input or output voltage an
13、d the equivalent field strengthwhere the EUT is placed,or the radiated power of the EUT.RFCDs should be principallycalibrated.Therefore,RFCDs need no evaluation measurement.Test site overview and overview of RFCDs are shown in tables A.1 and A.2 respectively.Table A.1 Test site overviewTest sitesAdv
14、antagesDisadvantagesOATS:Open area test siteLow construction costAvailable for large size EUTIncludes ground reflection effectsNeeds a lot of spaceInterference from othersWeather dependencyMeasurement fluctuation isrelatively high at frequencies higherthan 1 GHzLRTS:Low reflection test siteClear and
15、 flexible evaluationcriterionPossible to reduce errorWide frequency rangeAvailable for large size EUTNo influence of ground reflectionsDoes not reflect realityIs affected by absorber sizeInterference from othersAC:Anechoic chamberNo interferenceNo weather dependencyNo influence of ground reflections
16、Limited lower frequencyLimited EUT sizeExpensive,especially for lowfrequencyRFM:Random field measurementsiteFew construction site requirements(anywhere)Evaluation of real world antennaefficiencyClear and flexible evaluationcriterionAvailable for the evaluation ofdiversity antennaNeeds many measurement valuesand their calculationLICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.4 60489-1 Amend.2 IEC:1999(E)Table A.2 Overview of radio-
