Journal of E - Technology Lyubomir Laskov, Veska Georgieva, Stanio Kolev 12 2 2021 https://doi.org/10.6025/jet/2021/12/2/49-56 https://www.dline.info/jet/fulltext/v12n2/jetv12n2_3.pdf In this current research we have introduced and discussed a method for analyzing the spectrum analysis of discrete signals with different shape forms. To do so we have used Discrete Fourier transformation and Fast Fourier transformation. We have also presented an algorithm and its implementation in MATLAB environment. We then have analysed the program code that influence the signals parameters on their spectrum. We do hope that this research results can serve as a study of the education activity.