ANSI C 63.5-2017/Cor1-2019 pdf free download – American National Standard for Electromagnetic Compatibility一Radiated Emission Measurements in Electromagnetic Interference (EMI)Control-Calibration and Qualification of Antennas (9 kHz to 40 GHz).
NOTE 1—The editing instructions contained in this amendment define how to merge the material contained thereininto the existing base standard to form the comprehensive standard.
The editing instructions are shown in bold italic.Four editing instructions are used: change, delete, insert, and replace.Change is used to make corrections in cxisting text or tablcs. The cditing instruction specifics thc location of thechange and describes what is being changed by using strikethrough (to remove old material) and underscore (to addnew material). Delete removes existing material.Insert adds new material without disturbing the existing material.Insertions may require renumbering. If so, renumbering instructions are given in the editing instruction.Replace is usedto make changes in figures or equations by removing the existing figure or equation and replacing it with a new one.Editing instructions,change markings，and this NOTE 1 will not be carried over into future editions because thechanges will be incorporated into the base standard.
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5.1.1 Basic parameters for ssM antenna calibrationsReplace step e) as follows:
e) When a full two-port calibration (e.g.,Open/ShortLoad) is performed at the measurement plane where the cables mate to the antenna，matching attenuators at both the transmit antenna and thereceive antenna are not required, which applies only to measurement systems using vector-networkanalyzers. If a full two-port normalization is not performed,matching attenuators that provide avswR of 2:1 or less at the mating plane with the antennas shall be used.ANSI C 63.5 pdf download.