[wireless-regdb] [RFC] wireless-regdb: Update 5 GHz rules for Canada

[Seth Forshee]

On Tue, Feb 07, 2017 at 08:52:30AM +0100, Johannes Berg wrote:
> On Mon, 2017-02-06 at 14:50 -0600, Seth Forshee wrote:
> > +	(5150 - 5250 @ 80), (23), AUTO-BW
> 
> For 20 MHz this is right, since the document says:
> 
>     The maximum e.i.r.p. shall not exceed 200 mW or 10 + 10 log10 B,
>     dBm, whichever power is less. B is the 99% emission bandwidth in
>     megahertz. The e.i.r.p. spectral density shall not exceed 10 dBm in
>     any 1.0 MHz band.
> 
> However, for < 20 MHz, like 5 or 10, which we in theory do support, you
> can't use that much due to the spectral density requirement. It seems
> possible that that's where the 17 dBm came from, since 10 + 10 log10(5)
> is about 17.

Yes, thanks. I had forgotten to consider bandwidths less than 20 MHz.

Seth