The iCircuit Oscilloscope feature doesn't support an X-Y Mode, but this is still useful. The Device Under Test (DUT) will show the output of a normal 2-channel scope, and if your scope supports XY mode, you will have a poor man's curve tracer component tester. To drive it on a real scope, you'll need a Signal Generator as the AC supply (try 50Hz, or 500Hz, or 1KHz and around 5v settings). Easy to build for real. Use your scope test probe grabbers to attach DUT to resistor leads. [email protected] for questions.