Sketch Signal: (t-4)[u(t-2)-u(t-4)]

[DanielleL5432]

The question says to sketch the signal (t-4)[u(t-2)-u(t-4)].
I know that the inner part is a delay of two and a delay of four, but I don't know what to do with the (t-4)...does it have anything to do with the slope?

 

[CEL]

The question says to sketch the signal (t-4)[u(t-2)-u(t-4)].
I know that the inner part is a delay of two and a delay of four, but I don't know what to do with the (t-4)...does it have anything to do with the slope?

t-4 is a ramp with slope 1 passing by the point (4,0).
u(t-2)-u(t-4) is a pulse of amplitude 1 extending from t=2 to t=4. It acts as a window over the function t-4.

 

[unplebeian]

Sketch U(t-2). Then sketch U(t-4). Now subtract the two graphically. Does that help?

 

[eleni_p]

hello! could someone please explain to me how u(t)-2u(t-2)+u(t-5) is sketched?

 

[magica]

hello! could someone please explain to me how u(t)-2u(t-2)+u(t-5) is sketched?

+1 anyone?

 

[CEL]

You should sum a step of amplitude 1, starting at t = 0, with a step of amplitude -2 starting at t = 2 and a step of amplitude 1 starting at t = 5.