Calibration and uncertainty evaluation of pulse generator for EMC testing using FFT technique

Abstract

This paper presents the calibration of pulse generator according to International Special Committee on Radio Interference (CISPR) 16-1-1 standard using Fast Fourier Transform (FFT) technique for Electromagnetic Compatibility (EMC) Testing. The pulse generator is configured to source a pulse signal for each CISPR frequency band A, B and C respectively and the signal is then split into two paths using a splitter. A delay line is inserted into one path of them as a trigger signal to allow the sampling head of digital sampling oscilloscope to capture the signal from the other path. After that, the data is recorded and transferred to the computer using Labview software via a GPIB interface. This signal waveform is now analyzed using FFT and calculated on Matlab to compare with the standard. Finally, the calibration results are shown with uncertainty budget.