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Re: Setting negative value in dBm for power output (txpower)

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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
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