Thats what Im trying to get to the bottom of : ) The UBNT data sheet shows 25dmb and their website states 27dbm... so whichever one it is, set default power to that minus 7. UBNT does a great job with their marketing, but damn their technical details suck.
changeip, you are not understood well what "offset" means, the output that shows you in "tx power" is not the real, the real one tx + 7dBs. In terms of electronics, the chip handles the part of RF output but it is connected to another amplifier and that is what generates the offset.
so this graphics means
Rate tx power realtx power
6Mbps 19 19+7=26dbm~398.1mW +-2dbm
9Mbps 19 19+7=26dmb
36Mbps 18 18+7=25dbm~316.2mw
54Mbps 15 15+7=22dbm~158.5mW
HT20-1 18 18+7=25dbm~316.2mw
HT20-2 18 18+7=25dbm~316.2mw
HT20-3 17 17+7=24dBm~251.1mW
HT20-4 16 16+7=23dbm~199.5mw
HT20-5 15 15+7=22dbm~158.5mW
HT20-6 15 15+7=22dbm~158.5mW
HT20-7 14 14+7=21dbm~125mW
HT20-8 13 13+7=20dbm=100mW
HT40-1 18 18+7=25dbm~316.2mw
HT40-2 18 18+7=25dbm~316.2mw
HT40-3 17 17+7=24dBm~251.1mW
HT40-4 16 16+7=23dbm~199.5mw
HT40-5 15 15+7=22dbm~158.5mW
HT40-6 15 15+7=22dbm~158.5mW
HT40-7 14 14+7=21dbm~125mW
HT40-8 13 13+7=20dbm=100mW
I hope u will undertaand with this table
some cards doesnt saved in the eeprom the correct value.