This report tentatively concludes that for the static case that is examined AWS-3 devices could operate at a power level of up to 23 dBm/MHz equivalent isotropic radiated power (EIRP) and with out-of-band emissions (OOBE) attenuated by 60 + 10*log(P) dB without a significant risk of harmful interference. However, this report also notes that the Commission has in the past adopted less stringent OOBE standards under flexible service rules whereby the licensees and industry work together cooperatively to manage potential interference.

Devices are capable of accessing the "white spaces" between airwaves without affecting the adjacent licensed networks under certain power-level limits, the FCC concluded in a detailed report released Friday afternoon.

said by GOLFnSUN :

»hraunfoss.fcc.gov/edocs_public/a···45A2.pdf
The report defines what the engineers felt were safe power levels without causing interference. But then says the FCC commissioners in the past have weakened the stds they came up with to make industry happy.

said by RayW :

Ummm...what does this have to do with white space from the reduction in TV guard bands? The referenced article is talking about the 2 GHz band and as far as I know, OTA channel 83 is around 900 MHz and CATV channel 158 is about 1 GHz.

said by RayW :

Again...that has nothing to do with the TV spectrum, it is another band altogether with different characteristics.

2 GHz is not the same as sub 1 GHz.