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h1. AirOS

http://en.wikipedia.org/wiki/List_of_WLAN_channels
http://wireless.kernel.org/en/developers/Regulatory
http://wireless.kernel.org/en/developers/Regulatory/Database
<pre>
Band [MHz] Max BW [MHz] Flags Max antenna gain [dBi] Max EIRP [dBm (mW)]
2402.000 - 2482.000 40.000 N/A 20.00 (100.00) => 80 MHz


5170.000 - 5250.000 40.000 N/A 20.00 (100.00) => 80 MHz
5250.000 - 5330.000 40.000 DFS N/A 20.00 (100.00) => 80 MHz
5490.000 - 5710.000 40.000 DFS N/A 27.00 (501.19) => 220 MHz
(total 5 GHz 380 MHz, 5600-5650 = radar = 50 MHz)
</pre>

http://www.ubnt.com/wiki/RF_Compliance

For example, if you select 5805 MHz (40 MHz channel) and Below, the radio will use (5775 to 5795 MHz) + (5795 to 5815 MHz),
but if you select 5805 MHz (40 MHz channel) and Above, the radio will use (5795 to 5815 MHz) + (5815 to 5835 MHz).

ath9k http://wenku.baidu.com/view/ac0523f57c1cfad6195fa7f4.html

Ubnt founder: http://www.forbes.com/forbes/2012/0116/entrepreneurs-robert-pera-computer-hardware-apple.html

h2. v5.3.5

http://wiki.ubnt.com/AirOS_5.3

Channel width 5/10/20/40

TX power min max dBm
Loco 4 23
NS 8 27
NB 4 23
Rocket -4 27

LocoM2 5/10/20/40 dBm 5-23

h2. Comparaison

5.3.5 vs 5.5

Linux version 2.6.15-5.2 (buildd@builder) (gcc version 4.1.2) Mon Dec 19 20:46:46 EET 2011 (janvier 2006)
Linux version 2.6.32.54 (buildd@builder) (gcc version 4.1.2) Fri Apr 6 14:56:27 EEST 2012 (decembre 2009)

6842240 May 19 17:07 XM-v5.3.5.build11245.bin
6472831 May 19 17:07 XM-v5.5.build12536.bin

h2. v5.5

http://www.ubnt.com/download#doc
http://www.ubnt.com/downloads/guides/airOS/airOS_UG_V55_3-20-12.pdf

Country Compliance Mode Frequency 4920 Mhz a 6100 MHz
Channel width 3/5/8/10/20/25/30/40

TX power min max dBm
Loco 4 23
NS -4 27
NB -8 23
Rocket -4 27

LocoM2 3/5/8/10/20/25/30/40 dBm 5-23 Freq 2312 a 2732 MHz (France 5/8/10/20/30/40 et 2412-2472)

IPv6 supported in command line ping6 fe80::xxx%br0 works

h2. AirView test

References:
* http://forum.ubnt.com/showthread.php?t=52560
* ETSI EN 301 893 v1.7.0 (2012-01)
* http://www.etsi.org/deliver/etsi_en/301800_301899/301893/01.07.00_40/en_301893v010700o.pdf
** See diagram page 17 of the ETSI PDF

Lab on table same room compliance mode 5.5
- one NSM5 AP WDS
- one LocoM5 STA WDS 1 meter from the NSM5
- one NBM5 head (without dish) right in between Loco and NS running AirView

Steps for each graph
# associate NS and Loco with new frequency and width
# clear airview
# launch 300 second iperf client between netbook behind NSM5 to iperf server on locoM5
# after iperf is done save airview screenshot
# go back to step 1

h3. First batch testing narrow channels 5240 with 5200-5300 airview:

* 3 MHz
!5240-3.png!
* 5 MHz
!5240-5.png!
* 8 MHz
!5240-8.png!
* 10 MHz
!5240-10.png!
* 20 MHz
!5240-20.png!

h3. Second batch testing large channels 5300 with 5200-5400 airview:

* no emission to verify noise
!5300-0b.png!
* 10 MHz
!5300-10b.png!
* 20 MHz
!5300-20b.png!
* 30 MHz
!5300-30b.png!
* 40 MHz
!5300-40b.png!