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Message-ID: <f0b68f02-a95d-93e6-6437-523f360e4eb6@cesarb.eti.br>
Date:   Wed, 17 Aug 2022 21:07:27 -0300
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Subject: Re: [wireless-regdb] wireless-regdb: Update regulatory rules for
 Brazil (BR)
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From:   Cesar Eduardo Barros <cesarb@cesarb.eti.br>
To:     sforshee@kernel.org
Cc:     wireless-regdb@lists.infradead.org, linux-wireless@vger.kernel.org
References: <271ca023-d574-7d84-a020-ec5950fb500e@cesarb.eti.br>
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Em 17/08/2022 20:31, Cesar Eduardo Barros escreveu:
> For range 5925-7125 MHz (article 11.7), there are different rules for 
> APs, clients, and very low power devices. For APs (article 11.7.1), the 
> maximum EIRP is 30 dBm (article 11.7.1.1), and it's INDOOR-ONLY (article 
> 11.7.1.3); for clients of an indoor AP (article 11.7.2), the maximum 
> EIRP is 24 dBm (article 11.7.2.1), and it's INDOOR-ONLY (article 
> 11.7.2.3); for very low power devices (article 11.7.3), the maximum EIRP 
> is 17 dBm (article 11.7.3.1).

Thinking better about it, I might have miscalculated this one. Since the 
smallest channel we use is 20 MHz, and the EIRP power density for 
clients is limited to -1 dBm/MHz (article 11.7.2.2), if I'm doing the 
calculations correctly the limit for clients would be 12 dBm, that is,

(5925 - 7125 @ 320), (12), NO-OUTDOOR

It's unfortunate that we cannot represent that kind of rule in db.txt, 
and are forced to artificially limit the power by 12 dB (the full power 
of 24 dBm I had calculated would work only for 320 MHz).

I would appreciate if you could look over these power density rules, 
especially the ones which are in dBm/MHz instead of mW/MHz, since I 
might have miscalculated something else.

-- 
Cesar Eduardo Barros
cesarb@cesarb.eti.br