Hãy xác định biến đổi Z một phía của tín hiệu trễ sau. Nếu Z T [ x ( n ) ] = X ( Z ) Thì Z T [ x ( n − 2 ) ] sẽ là:

$ZT{}_1\left[x\left(n-2\right)\right]=Z{}^{-2}\cdot X{}^1\left(Z\right)$

$\text{Z}\text{T}{}_1\left[\text{x}\left(\text{n}-2\right)\right]=\text{Z}{}^{-2}\cdot \text{X}{}^1\left(\text{Z}\right)+\text{x}\left(-1\right)+\text{x}\left(-2\right)$

$\text{Z}\text{T}{}_1\left[\text{x}\left(\text{n}-2\right)\right]=Z{}^{-2}X{}^1\left(Z\right)+x\left(-2\right)+Z{}^{-1}x\left(-1\right)$

$\text{Z}\text{T}{}_1\left[\text{x}\left(\text{n}-2\right)\right]=\text{X}{}^1\left(\text{Z}\right)+\text{x}\left(-1\right)+\text{x}\left(-2\right)$