I would like to understand the difference between frequency response and transfer function. I know the former can be obtained by substituting \$s = j\omega\$.
But what is the difference in information I can get from both representations? What are the respective limitations and where do I apply which method?
I'd also be glad for some literature recommendations.
Could someone explain the calculations of the second answer (by Chu) a little more extensively? I don't quite get how he determines the values of \$ \phi \$ and X, and how he compares it with setting s equal to \$ j\omega \$ in the transfer function.