What is the difference between delay and difference properties of z-transform?

1. What is the difference between Z-transform and?
2. Why is Z-1 delay?
3. What is the unit of delay element Z '?

What is the difference between Z-transform and?

The Z-transform is used to analyse the discrete-time LTI (also called LSI - Linear Shift Invariant) systems. The Laplace transform is used to analyse the continuous-time LTI systems.

Why is Z-1 delay?

polynomial by z-1 simply subtracts one from each exponent in the polynomial, thereby creating a delay of one.

What is the unit of delay element Z '?

If z–transform of x(k) be X(z), then z–transform of x (k + 1) is zX (z). Therefore, for an input zX (z) to a delay element, output will be X(z). Hence the transfer function of delay element. We can also write the letter 'D' or z ⁻¹ in the block of 'unit delay' element.