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© 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes,creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. ; Measuring receivers are used for measurement of radio disturbance in the frequency range typically 9 kHz to 18 GHz. Such receivers can be either electromagnetic interference (EMI) receivers or spectrum analyzers with the quasi-peak (QP) detector. Requirements for measuring receivers are discussed in European CISPR documents (Comité International Spécial des Perturbations Radioélectriques) and US standards ANSI 63.2 (QP parts derived from CISPR). Although novel techniques are being evaluated, the traditional way of checking compliance of the receiver with requirements of these standards is using a calibrated pulse generator. The calibration of pulse generators is discussed in the standard EN 55016-1-1, which is the harmonized version of the international standard IEC/ CISPR 16-1-1(currently Ed. 4). In the standard, however, only a very brief description of the methods is given and technical details are hidden. The measurement uncertainty of the pulse generator characterization is not discussed in the standards; however, it was discussed in several previous works. This paper aims to provide a more thorough description of particular calibration methods together with practical hints which may be useful for students, calibration engineers, and practitioners. ; This work was supported by the project 15RPT01 RFMicrowave. This project has received funding from the EMPIR programme co-financed by the Participating States and from the European Union's Horizon 2020 research and innovation programme ; Peer Reviewed ; Postprint (author's final draft)

© 2022 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes,creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. ; This work presents a methodology for the time-frequency characterization of the switching losses in Gallium Nitride Field Effect Transistors used in power electronics applications, particularly in DC-DC converters. Typically, switching losses are measured in the time-domain through the integration of the instantaneous power, that is, the product of the voltage multiplied by the current, during the turn-on and turn-off transients. Nonetheless, as novel power transistors allow for switching times in the nanosecond range, the accuracy of such measurements is compromised by the limitations of the probe-oscilloscope systems in terms of bandwidth and dynamic range. Here, we analyze the time-domain switching loss measurement method, and then, through a complementary setup it is demonstrated how to validate the results in the frequency domain. A DC-DC half-bridge buck converter circuit based in the EPC2001C was used as representative test sample. Less than 1% of difference in critical parameters such as rise-time, pulse width, state-levels and, switching frequency, is encountered between the time and frequency domain approaches. Moreover, the measurement uncertainty is analyzed and estimated to be between 1% and 8%. This work allows for highly confident switching loss measurements, a better understanding of the switching phenomena and of the measurement system performance. ; This research work is carried in the framework of the 16ENG06 ADVENT project. This project, 16ENG06 ADVENT, has received funding from the EMPIR programme co-financed by the Participating States and from the European Union's Horizon 2020 research and innovation programme. ...