And because the spectrum of a discrete time signal, this exact spectrum will periodically repeat if we extended the frequency higher outside of $f_s$ this kind of which the spectrum demonstrated is additionally the identical spectrum in each individual frequency band from $nf_s$ to $(n+1)f_s$ for just about any integer https://pgingurugramsector14.blogspot.com/2025/07/modern-boys-pg-in-gurgaon-sector-15.html