0 0 votes An excitation is applied to a system at $\mathrm{t}=\mathrm{T}$ and its response is zero for $-\infty<t<T$. Such a system is non-causal system stable system causal system unstable system Continuous-time Signals gate1991-ec signals-and-systems + – admin 516 views answer comment Share Follow Add Sync Questions Print 0 reply Please log in or register to add a comment.