Determine the suitable measure of the signal:

periodic refers to events or data transmissions that do not occur at regular or predictable intervals

A signal that has a value of specific points in time is called (جت في الامتحان)

refers to advancing or postponing the activity of signal in time

A signal is … (made to lag, brought to later)

A signal is … (brought to earlier)

If T is +ve, shift is to the Left

If T is –ve, shift is to the left

means accelerating (compression) or decelerating (expansion)

When the time coefficient t is multiplied by a > 1, the signal is …

If t is multiplied by 0 < a < 1, the signal is compressed

What is the operation?

This is also called folding

In the inversion The signal is folded or mirrored around the … axis

Imagine the vertical line as a rectangle with an infinite small width 𝜖 and an infinitely large height

The 𝛿(𝑡) exists only at t = …

It is a causal signal, i.e. has value for 𝑡 ≥ 0

U(t) = 0 when t .. 0

in Unit Step : if g(t) =5 , t= 3
g(t) * u(t) =