And as the spectrum of the discrete time signal, this similar spectrum will periodically repeat if we prolonged the frequency higher further than $f_s$ this kind of that the spectrum shown is also the exact same spectrum in every single frequency band from $nf_s$ to $(n+one)f_s$ for any integer $n$. https://girlspgsector15part2gurgaon.video.blog/2025/07/28/find-your-ideal-pg-in-sector-14-gurgaon-with-osmstays/