Transmit Power Spectral Density IEEE 702.15.4-2006 specifies in section 6.5.3.1 that spectral products further away from the carrier frequency than 3.5 MHz have to be at least 20 dB below the highest average within 1 MHz of the carrier. File Frequency TX power set. Pickup psd-2430.png 2430 MHz -12.2 dBm Cable Cable pickup: http://downloads.qi-hardware.com/people/werner/wpan/atusd/tethered.jpg