Prof. Rich Kozick
ELEC 320, Fall 1997

Homework 6

Date Assigned: Wednesday, September 10, 1997
Date Due: Friday, September 12, 1997

1. Please read Sections 2.1 and 2.2 in the Kamen/Heck text.
2. The URL http://spectrum.ece.jhu.edu/wjr/
   contains several interesting Java applets that illustrate signals and systems concepts. Go to this web page, and check out the System Properties link. Focus on the Continuous-time systems for now. The objective is to classify whether systems are linear, time-invariant, causal, etc. by applying various input signals and observing the system output signals.

   Try as many of the systems as you would like. At minimum, classify systems A and F. Submit a brief solution on Friday the summarizes your answers and reasoning. Do not worry about classifying the systems as stable, since we have not discussed stability. It is not necessary to print any plots or other details from the experiments. Make a note if you discover any interesting systems other than A and F, so we can look at them in class on Friday.

   The experiments will work fine if you apply only one input signal at a time. Some useful signals to apply might be a unit step u(t), a delayed step u(t-1), a scaled step 2*u(t), and a sine wave sin(t). You can try others also, but these should get you started.

Thank you.