SAE J2295 Fasteners Part Standard--Cap Screws, Hex Bolts, and Hex Nuts (Inch Dimensioned)

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Product Code:SAE J2295
Title:Fasteners Part Standard--Cap Screws, Hex Bolts, and Hex Nuts (Inch Dimensioned)
Issuing Committee:Ship Systems Technical Steering Committee
Scope:This SAE Standard provides part numbers for the identification of fasteners for ship systems and equipment. This document lists some of the more common industry standards that have associated part numbering systems. In addition, this document provides part numbers for screws and nuts to American Society for Testing and Materials (ASTM) fastener standards covering materials most often used in ship systems and equipment.The purpose of this document is to assist the designer and other personnel in providing standard part numbers for the most commonly used fasteners for ship systems and equipment. A part identification number (PIN) is normally required for all military applications and provides a useful means of communicating fastener requirements to suppliers and manufacturers in a very succinct manner.
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【英文标准名称】:Integratedcircuits-Measurementofelectromagneticemissions,150kHzto1GHz-Part2:Measurementofradiatedemissions-TEMcellandwidebandTEMcellmethod
【原文标准名称】:集成电路.150kHz-1GHz电磁辐射的测量.第2部分:辐射释放测量.TEM辐射室和宽频TEM辐射室法
【标准号】:IEC61967-2-2005
【标准状态】:现行
【国别】:国际
【发布日期】:2005-09
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/SC47A
【标准类型】:()
【标准水平】:()
【中文主题词】:电磁辐射;集成电路;印制电路板;试验条件;辐射释放;试验电路;电子设备及元件;频率范围;测量;电气工程;测量技术;试验装置;试验
【英文主题词】:Electricalengineering;Electromagneticradiation;Electronicengineering;Electronicequipmentandcomponents;Frequencyranges;Informationtechnology;Integratedcircuits;Interferingemissions;Measurement;Measuringtechniques;Printed-circuitboards;Radiatedemissions;Testcircuits;Testing;Testingconditions;Testingdevices;Widebandtransmission
【摘要】:Thistestproceduredefinesamethodformeasuringtheelectromagneticradiationfromanintegratedcircuit(IC).TheICbeingevaluatedismountedonanICtestprintedcircuitboard(PCB)thatisclampedtoamatingport(referredtoasawallport)cutinthetoporbottomofatransverseelectromagnetic(TEM)orwidebandgigahertzTEM(GTEM)cell.Thetestboardisnotinsidethecell,asintheconventionalusage,butbecomesapartofthecellwall.ThismethodisapplicabletoanyTEMorGTEMcellmodifiedtoincorporatethewallport;however,themeasuredradiofrequency(RF)voltagewillbeaffectedbymanyfactors.TheprimaryfactoraffectingthemeasuredRFvoltageistheseptumtoICtestboard(cellwall)spacing.Thisprocedurewasdevelopedusinga1GHzTEMcellwithaseptumtofloorspacingof45mmandaGTEMcellwithaverageseptumtofloorspacingof45mmovertheportarea.Othercellsmaynotproduceidenticalspectraloutputbutmaybeusedforcomparativemeasurements,subjecttotheirfrequencyandsensitivitylimitations.AconversionfactormayallowcomparisonsbetweendatameasuredonTEMorGTEMcellswithdifferentseptumtofloorspacing.TheICtestboardcontrolsthegeometryandorientationoftheoperatingICrelativetothecellandeliminatesanyconnectingleadswithinthecell(theseareonthebacksideoftheboard,whichisoutsidethecell).FortheTEMcell,oneofthe50Ωportsisterminatedwitha50Ωload.Theother50ΩportforaTEMcell,orthesingle50ΩportforaGTEMcell,isconnectedtotheinputofaspectrumanalyserorreceiverthatmeasurestheRFemissionsemanatingfromtheintegratedcircuitandimpressedontotheseptumofthecell.
【中国标准分类号】:L56
【国际标准分类号】:31_200
【页数】:52P.;A4
【正文语种】:英语