MikroTik

Hello, can you give me some idea, how are boards (namely I am now interested in 751G, 711, and 2011 in future) Calibrated? We met, that RF diagnostics by Mikrotik cant be compared to UBNT. Mikrotik is pretty accurate on RX level detection we believe. But what we met there is some hard jitter by TX power..
Do you make calibration on TX power both chains thru all the band ( 2100-2700MHz, or there is just basic calibration on 2,4-2,48GHz? ), or there is no calibration at all ?

Thanks