Extreme Networks

I have an AP that is showing 45% RX CRC errors. But the math in the interface counters doesn't seem to make any sense of this. Below are the RX Counters

Hello, in the environment that I manage. We have several AP230s and AP330s. All of them have a max TX dB of 20 dBm. Why is it so much lower than the 30 dBm that is allowed. I'm in the US, and my APs are all set for country code 840. Is this intention...