I have a 32km link with 32dbi dual pol. antenna (http://www.l-com.com/item.aspx?id=22100), the signal level is around -58dBm, and the noise level is from -112 to -115dBm in some channel, HT Chains 0 and 1 selected. I test it with many channels configurations (from 5000Mhz to 6000Mhz, I have a superc...