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Neither exception is clear. Understand what the power output of the radio is (in dBm) and the gain of your antennas (dBi).A 15dBm radio + 2dBi Antenna makes for an output of 17dBm. To convert milliwatts to dBm:dBm = 10 * (log (1000 * P))P = Power in Watts1000mW = 1 WattTo convert dBm to milliwatts:P = 0.001 * (10**(dBm/10))P = Power in WattsSimply put, FCC regulations have a 1 WATT (30dBm) limit on omni directional antennas and 2 WATT (33dBm) limit on directional antennas.