Hi all,
I know this has been asked before, but I'm not sure what the current state of affairs is.
I am trying to control the tx power on my WRT 1900ac. I'm doing this for some lab testing, and need to be able to set the tx power (for example using iw dev wlan1 set txpower fixed 10mBm).
When I use the above command and look at the output on the spectrum analyzer, I see no change in output power.
More alarmingly, I have built (for lab use) a special reg-domain build that has country codes that correspond to different max powers:
...
country 29:
(2400 - 2483 @ 40), (29)
(5140 - 5860 @ 160), (29)country 30:
(2400 - 2483 @ 40), (30)
(5140 - 5860 @ 160), (30)So, I can set the max txt power to 15dBm by simply doing
iw reg set 15
This also fails to change the TX power at all! This implies to me that the 1900ac is ignoring the regulatory domain settings!
Am I doing something wrong here? Is there support for controlling the TX power, or even properly setting the max power for the purposes of regulatory compliance???
Thanks a lot in advance...
With the FCC getting pissed off; I hope you plan to do your testing in the great plains of North America (Out west in the middle of a section of land (One square mile / 2.6 square kilometres - 640 acres / 260 hectares) and not in a city or near an airport but in a Faraday cage or a shielded room.
It would seem to me that in 2015/2016 and earlier there would be a requirement in firmware to SET the country by looking at the IP address of the provider. In North America it is really simple; Canada, the United States & Mexico. In Europe where the countries are small; it would be easier to "pretend that you are from a different country". A table of ITU (International Telecommunications Union) assigned IP address by country would not be very large.
In Southern Ontario, FCC radio interference open field testing is usually done between Kitchener, Ontario and London, Ontario where interference is minimal. I've driven 2 1/2 hours west of Toronto to be there for the tests.
You do realize that while your "statement" may be true; it may be that you are simply trying to get higher power that you are NOT entitled to use; unless precautions are in place.
This question may NOT get answered even if the answer is known.
Rick
Edit: IF you know how to circumvent the country where you live; I STRONGLY SUGGEST that you don't post.
IF the FCC bans open source firmware in the US; the world will lose.
We need a world with the US more like the EU OR an EU more like the US to get some balance. God help us if the EU were states and the President was from ???.
(Last edited by RickStep on 12 Jan 2016, 22:38)