Warning: Board is not calibrated for 5.9 GHz band. It is possible to calibrate the Board to 5.9.The new upgrade is Software VersionVersion 1.3.4.
The message “Warning: Board is not calibrated for 5.9 GHz band” merely indicates that the radio is not calibrated for 5.9GHz band. You will not be able to select and operate in a 5.9GHz band with this radio. However, this has no impact on the other bands. You will still be able to operate in the 5.2/5.4/5.7/5.8 band if your country code and regions allows it.”