Subharmonics of Fac[Hz] around the carrier freq of Fsw[kHz], \(N=\frac{Fsw}{Fac}\)
If m=0 then only harmonics at Fsw, 3*Fsw, 5*Fsw
If N=even then harmonics +/-Fac[Hz] around Fsw, 2*Fsw, 3*Fsw, ...
If N=odd then harmonics +/-2*Fac[Hz] around Fsw, 2*Fsw, 3*Fsw, ...
The PWM signal is shifted downwards by -2 on the graph below for better viewing




