提供使用选定的ITU-R P系列射频探测模型和预测方法共享研究和干扰评估所需的技术信息和指导。本手册旨在与ITU-R P系列建议结合使用，以协助对无线电通信服务系统执行干扰分析和预测方法。

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定价： 1177元 / 折扣价： 1001 元 加购物车

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定价： 515元 加购物车

定价： 571元 加购物车

定价： 515元 加购物车

4.1 Different electroplating systems can be corroded under the same conditions for the same length of time. Differences in the average values of the radius or half-width or of penetration into an underlying metal layer are significant measures of the relative corrosion resistance of the systems. Thus, if the pit radii are substantially higher on samples with a given electroplating system, when compared to other systems, a tendency for earlier failure of the former by formation of visible pits is indicated. If penetration into the semi-bright nickel layer is substantially higher, a tendency for earlier failure by corrosion of basis metal is evident.1.1 This test method provides a means for measuring the average dimensions and number of corrosion sites in an electroplated decorative nickel plus chromium or copper plus nickel plus chromium coating on steel after the coating has been subjected to corrosion tests. This test method is useful for comparing the relative corrosion resistances of different electroplating systems and for comparing the relative corrosivities of different corrosive environments. The numbers and sizes of corrosion sites are related to deterioration of appearance. Penetration of the electroplated coatings leads to appearance of basis metal corrosion products.1.2 The values stated in SI units are to be regarded as the standard.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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This PDF includes GI #2. 1. Scope 1.1 This Standard applies to filters rated up to 125 A intended for suppressing electromagnetic interference in, or with, apparatus and machines that are to be connected to an ac supply with nominal system voltages

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This PDF includes Amd #1 and #2. 1. Scope 1.1 This Standard sets forth the characteristics of an instrument conforming to C.I.S.P.R. requirements for the measurement of electromagnetic interference, both conducted and radiated, in the frequency ran

定价： 455元 / 折扣价： 387 元