Hi, The AR9280 and later atheros NICs support a minimum TX power of -5 dBm. It depends on what the actual NIC manufacturer does (if they glue an amplifier on the end, then all bets are off) but the chipsets are capable of it. It's also possible someone's glued attenuators to pre-AR9280 series NICs to achieve the same output. Or you could do the same. But at that point you're not communicating < 0 dBm to the NIC, and I don't think cfg80211 has the idea of a TX power offset (ie, that the NIC output is +/- x dBm different to the programmed value.) HTH, Adrian -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html