The measurement of the spectral occupation based on the duty cycle, is a very important subject when it comes to designing and dimensioning Wi-Fi wireless networks.This article aims to present the measurement, analysis and evaluation of the spectral occupation of the Wi-Fi network (2.4 -2.5 GHz) from the Faculty of Technology of District University Francisco Jose de Caldas.In order to determine the Wi-Fi network's duty cycle level, a campaign took place for measuring the spectral occupation in the 2.4 to 2.5 GHz frequency band, during a month.Such data was later processed and analyzed.The obtained results show that Wednesdays are when the highest spectral occupation occurs with 95% utilization.As a conclusion, it is important to know the levels of spectral use in the wireless Wi-Fi networks in order to determine the most suitable redesign that ensures a great signal quality and satisfies the university's community.Keyword -duty cycle, spectral occupation,