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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】:Waterquality--Detectionandenumerationofcoliformorganisms,thermotolerantcoliformorganismsandpresumptiveEscherichiacoli--Part2:Multipletube(mostprobablenumber)method
【原文标准名称】:水质.大肠杆菌,耐热大肠杆菌和假定大肠杆菌生物体的计数和检测.第2部分:扩增管(最大概率数)法
【标准号】:JISK0430-72-40-2000
【标准状态】:现行
【国别】:日本
【发布日期】:2000-08-20
【实施或试行日期】:
【发布单位】:日本工业标准调查会(JP-JISC)
【起草单位】:TechnicalCommitteeonEnvironmentandRecyclingPolicy
【标准类型】:()
【标准水平】:()
【中文主题词】:计数方法(微生物学);水;生物水污染物
【英文主题词】:biologicalwaterpollutants;countmethods(microbiology)
【摘要】:この規格は,複数の試験管中の液体培地中で培養し,最確数(MPN)法によって大腸菌群,耐高温性大腸菌群及び推定大腸菌(Escherichiacoli)(以下,推定E.coliという。)の検出?試験方法及び菌数の計数方法について規定する。この方法は,濁度が高い場合をはじめすべての試料に適用できる。大腸菌(E.coli)を含む大腸菌群の検出と確認のための試験は,一連の連続試験の一部とみなすことができる。個々の試料の確認試験をどこまで実施するかは試料の性質によって異なり,また,試験の目的に応じて判断すべきである。実際,3.3に規定する推定E.coliの検出は,通常,最近に起こったふん便汚染を示唆するものである。
【中国标准分类号】:Z16
【国际标准分类号】:13_060_70
【页数】:17P;A4
【正文语种】:日语