step response of a siso system.

num=[4000];
den=[1 50 3250];
trans=tf(num,den)
step(trans)

my doubt is when we give step() command,what is the input here?is it unit step? how can i check my result with some other magnitude of step()?

Answer 1

[Azzi Abdelmalek]

The step function uses a unit step signal, if you want to use a step signal with k magnitude, just use

step(k*trans)

If you to choose your own input signal you can use lsim function