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Subject: Re: [ath9k-devel] trying to set tx power (using txpower option)
From: Johannes Berg <johannes@sipsolutions.net>
To: David Willmore <davidwillmore@gmail.com>
Cc: David Lamparter <equinox@diac24.net>,
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Date: Fri, 08 Oct 2010 20:05:46 +0200
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On Fri, 2010-10-08 at 14:00 -0400, David Willmore wrote:
> On Fri, Oct 8, 2010 at 1:41 PM, David Lamparter <equinox@diac24.net> wrote:
> > d-B-m is deci-Bel-milliWatt, so a mBm ostensibly is a
> > milli-Bel-milliWatt...
> >
> > (yes, the "m" really encodes "mW"...)
> 
> The value is a "Power", so the base unit of Watts is implicit.
> 
> This particular unit has always confused the heck out of me.
> It's *not* milli-Bel-milliWatt or the division would be by 1000,
> so it's really centi-Bel-milliWatt, no?

No, the d in dB already means it's 1/10 B, and mB is (was meant to be)
1/1000 B -- so the conversion factor is 100.

johannes