Display interference Wifi signal
i find an interference in the WIFI signal when display is ON vs SLEEP - see pic - interference is ~30sec cycle and sometimes does not appear but has been consistent with DISPLAY ON/SLEEP modes.
there is no change in WIFI signal from FIOS router - i tested adjacent PC and no variation - also this affect occurs in multiple locations so not dependent on anything that i have determined.
MacBook Pro (Retina, Mid 2012), OS X Mountain Lion (10.8.4)