ITU-T O.9-1999
关于地球的评估不平衡程度的测量安排.系列O:测量设备通用规范研究组4

Measuring Arrangements to Assess the Degree of Unbalance About Earth - Series O: Specifications of Measuring Equipment General Study Group 4; 19 pp


 

 

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标准号
ITU-T O.9-1999
发布日期
1999年03月01日
实施日期
废止日期
中国标准分类号
M74
发布单位
IX-ITU
引用标准
ITU-T G. 117-1996 CCITT 4.45-1984 ITU-T O. 133-1993
适用范围
This Recommendation describes arrangements for measuring the following parameters: - longitudinal conversion loss; - transverse conversion loss; - longitudinal conversion transfer loss; - transverse conversion transfer loss; - input longitudinal interference loss; - common-mode rejection; - output signal balance. In practice, the above parameters are the seven most significant unbalance parameters. Limits for these parameters, special considerations for terminating impedances and the measurement frequencies to be used are given in the relevant Recommendation for the item under test. This Recommendation is in agreement with the principles, the nomenclature and the definitions, addressed in Recommendation G. 1 17 [ 11, which considers the transmission aspects of unbalance about earth. References are made in the following clauses to the appropriate parts of Recommendation G. 1 17 [i]. In clause 5, guidance is given regarding the construction of a test bridge along with values of the required components.

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