I am a PhD student in Univ of Illinois at Urbana-Champaign, and currently working on energy saving for mobile devices. Basically, I change the CPU frequency/voltage to save energy.
Now I and my advisor want to buy a PC Oscilloscope to measure the variations of the energy consumption of a laptop or iPAQ. That is, when I change the CPU frequency/voltage, the Oscilloscope should show the changes of the input power of the laptop (e.g., the current or the voltage of the AC input). I expect that the power change is quite small.
Would you please recommend a desirable device for such a requirement? Thanks