SL 2.1-1998 水利水电量、单位及符号的一般原则

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Product Code:SAE J1752/3
Title:Measurement of Radiated Emissions from Integrated Circuits -- TEM/Wideband TEM (GTEM) Cell Method; TEM Cell (150 kHz to 1 GHz), Wideband TEM Cell (150 kHz to 8 GHz)
Issuing Committee:Electromagnetic Compatibility (Emc) Standards
Scope:This measurement procedure defines a method for measuring the electromagnetic radiation from an integrated circuit (IC). The IC being evaluated is mounted on an IC test printed circuit board (PCB) that is clamped to a mating port (referred to as a wall port) cut in the top or bottom of a TEM or wideband TEM (GTEM) cell. The test board is not in the cell as in the conventional usage but becomes a part of the cell wall. This method is applicable to any TEM or GTEM cell modified to incorporate the wall port; however, the measured RF voltage is affected by the septum to test board (wall) spacing. This procedure was developed using a 1 GHz TEM cell with a septum to wall spacing of 45 mm and a GTEM cell with average septum to wall spacing of 45 mm over the port area. Other cells may not produce identical spectral output but may be used for comparative measurements, subject to their frequency and sensitivity limitations. A conversion factor may allow comparisons between data measured on TEM or GTEM cells with different septum to wall spacing. The IC test board controls the geometry and orientation of the operating IC relative to the cell and eliminates any connecting leads within the cell (these are on the backside of the board, which is outside the cell). For the TEM cell, one of the 50 ohm ports is terminated with a 50 ohm load. The other 50 ohm port for a TEM cell, or the single 50 ohm port for a GTEM cell, is connected to the input of a spectrum analyzer or receiver that measures the RF emissions emanating from the IC and coupled onto the septum of the TEM cell (see Figure 1).【英文标准名称】:Aerospaceseries-Bolts,T-head,closetolerance,mediumthreadlength,inheatresistingnickelbasealloyNI-P100HT(Inconel718),uncoated-Classification:1275MPa/650°C;GermanandEnglishversionEN3293:2008
【原文标准名称】:航空航天系列.NI-P100HT(Inconel718)型非涂覆耐热镍基合金中等螺纹长度紧公差T字头螺栓.等级:1275MPa/650℃
【标准号】:DINEN3293-2008
【标准状态】:现行
【国别】:德国
【发布日期】:2008-10
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:航空航天运输;航空运输;合金;坯料;设计;名称与符号;尺寸;紧固件;配合螺栓;带帽螺钉;高温;作标记;质量(物质);材料;MJ螺纹;多语种的;镍合金;镍基合金;螺钉;航天运输;规范(验收);T字头螺栓
【英文主题词】:Aerospacetransport;Airtransport;Alloys;Blank;Design;Designations;Dimensions;Fasteners;Fittingbolts;Headscrews;Hightemperature;Marking;Mass;Materials;MJ-threads;Multilingual;Nickelalloys;Nickelbasealloys;Screws(bolts);Spacetransport;Specification(approval);T-headbolts
【摘要】:ThisstandardspecifiesthedimensionsofuncoatedT-headbolts,closetolerance,withMJ-thread,mediumthreadlength,inheat-resistingnickelbasealloyNI-P100HTforaerospaceapplications.Maximumtesttemperatureofthepartsis650℃.Theseboltsaretobeusedinaerospacefasteningsystemsmainlystressedinshearingforce.
【中国标准分类号】:V20
【国际标准分类号】:49_030_20
【页数】:18P.;A4
【正文语种】: