Figure 2
From: Spectrum analysis of digital UPWM signals generated from random modulating signals
Computationally evaluated DFT of a sinewave modulating signal with \({f}_{{\text{sin}}}=200 \, {\text{Hz}}\); \({f}_{s} = 44.1 \, {\text{kHz}}\) and 8-bit resolution: (a) full DFT spectrum, (b) detail from 1st and 2nd carrier harmonic, (c) carrier fundamental and surrounding side frequencies and (d) carrier 2nd harmonic and surrounding side frequencies. Odd/Even harmonics marked with crosses.
