3.16 mV/m = 70 dBu
1 mV/m = 60 dBu
.7 mV/m = 57 dBu
.5 mV/m = 54 dBu
.25 mV/m = 48 dBu
.1 mV/m = 40 dBu
.05 mV/m = 34 dBu