On 09/30/2011 01:21 PM, Adrian Chadd wrote:

On 29 September 2011 20:46, Zefir Kurtisi [off-list ref] wrote:

quoted

Really? Where would be 'there' countrycode-wise?

That would definitely break today's CRDA capabilities :-\

I -think- one or both of ETSI/FCC have different CAC/NOL requirements
for the channels which overlap the weather radars.
At least when someone took FreeBSD to get DFS certified a while ago,
the weather radar ranges were checked against a 30 minute CAC. :)

I think it's worth defining specific DFS parameters for each frequency
range. That's what I'll be doing for FreeBSD when I revamp its
net80211 regulatory database code.


Adrian

I was assuming that weather radars will not be supported at all but the related channels be just disabled. It is practically impossible to assure a 99.99% detection probability (as required for ETSI 1.5.1), or? E.g. to detect ETSI radar pattern 1 (10 pulses), you basically need to treat any single detected pulse as radar event. Doable, but not very useful ;)


Zefir