From: Johannes Berg <johannes@sipsolutions.net>
To: David Willmore <davidwillmore@gmail.com>
Cc: David Lamparter <equinox@diac24.net>,
Ben Greear <greearb@candelatech.com>,
ath9k <ath9k-devel@venema.h4ckr.net>,
linux-wireless <linux-wireless@vger.kernel.org>
Subject: Re: [ath9k-devel] trying to set tx power (using txpower option)
Date: Fri, 08 Oct 2010 20:05:46 +0200 [thread overview]
Message-ID: <1286561146.3612.14.camel@jlt3.sipsolutions.net> (raw)
In-Reply-To: <AANLkTi=oR_RfbNv4D-d_rXP4p4ykZC00bJRPnwjrhgo-@mail.gmail.com>
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
next prev parent reply other threads:[~2010-10-08 18:05 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <SNT111-W333C4BA6050D535151071FFB690@phx.gbl>
[not found] ` <SNT111-W2989DC6A52022428756E6FB500@phx.gbl>
[not found] ` <20101008111221.5425.qmail@stuge.se>
[not found] ` <AANLkTimAfH8ChkjwFB7e2kMbJyxaZQZMSxTcThva=jgN@mail.gmail.com>
[not found] ` <SNT111-W21A1F92DC5DADE5968C8CCFB500@phx.gbl>
2010-10-08 16:45 ` [ath9k-devel] trying to set tx power (using txpower option) Luis R. Rodriguez
2010-10-08 16:48 ` Ben Greear
2010-10-08 16:52 ` Luis R. Rodriguez
2010-10-08 17:07 ` Ben Greear
2010-10-08 17:12 ` Johannes Berg
2010-10-08 17:24 ` Ben Greear
2010-10-08 17:28 ` Johannes Berg
2010-10-08 17:38 ` Ben Greear
2010-10-08 17:41 ` David Lamparter
2010-10-08 18:00 ` David Willmore
2010-10-08 18:05 ` Johannes Berg [this message]
2010-10-08 23:10 ` David Willmore
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