Power Spectral Density units
The division should be by 100000, but I doubt that hardware is giving the result in actual milliwatts, maybe a normalization is required in the power being reported by the hardware as well followed by a subsequent normalization in bandwidth. This would require knowing how the hardware is generating this number, 

considerations like, what is amount of duration over which hardware measures this spectrum, does it average out over those durations or does it provide cumulative value which needs to be normalized.