And because the spectrum of the discrete time sign, this very same spectrum will periodically repeat if we prolonged the frequency higher beyond $f_s$ this kind of the spectrum shown is additionally precisely the same spectrum in every single frequency band from $nf_s$ to $(n+1)f_s$ for almost any integer $n$. https://pgingurugramforboys.blogspot.com/2025/07/affordable-boys-pg-in-gurgaon-sector-15.html