It can be considered general knowledge, that a "cable" controller gives a better latency in games than a cordless controller. So I wanted to find out if a cordless controller uses an "USB recharge cable" for communication, if the cable is connected. Therefor I used I a high frequency detector as it will visualize any emissions. Surprise surprise surprise: You will see in the small clips, that the PS3 Controller stops emitting when the USB cable is attached, while the XBOX 360 controller continues to communicate via bluetooth. But but but, that was not the big surprise. The surprise was that both consoles, even if wireless lan was deactivated, where emitting at full strength wlan radiation. Even if the console are in standby! "Always on" - somehow in this console generation too.
Are you sure you just weren't picking up latent wireless signals from all the other devices around when testing the consoles?
Good question, but impossible. Signal strength is decreasing with distance from it´s source. The device I use for the tests gives precise readings, especially as is stops working when in contact wih the source (when the singnal strentgh is higher than the device could measure).