krll@pb:~$ iwconfig wlan0
wlan0 IEEE 802.11bgn ESSID:"wl0_Guest2"
Mode:Managed Frequency:2.462 GHz Access Point: 72:82:61:A5:21:78
Bit Rate=2 Mb/s Tx-Power=16 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=26/70 Signal level=-84 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:187 Invalid misc:6320 Missed beacon:0
Ставлю страну Bolivia
krll@pb:~$ sudo iw reg set BO
krll@pb:~$ sudo iw reg get
country BO: DFS-UNSET
(2402 - 2482 @ 40), (N/A, 30)
(5735 - 5835 @ 40), (N/A, 30)
Проверяю что Tx-Power возможно изменить, cтавлю 10
krll@pb:~$ sudo iwconfig wlan0 txpower 10
krll@pb:~$ iwconfig wlan0
wlan0 IEEE 802.11bgn ESSID:"wl0_Guest2"
Mode:Managed Frequency:2.462 GHz Access Point: 72:82:61:A5:21:78
Bit Rate=1 Mb/s Tx-Power=10 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=22/70 Signal level=-88 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:9 Invalid misc:29 Missed beacon:0
10 установилось, пробую 30
krll@pb:~$ sudo iwconfig wlan0 txpower 30
krll@pb:~$ iwconfig wlan0
wlan0 IEEE 802.11bgn ESSID:"wl0_Guest2"
Mode:Managed Frequency:2.462 GHz Access Point: 72:82:61:A5:21:78
Bit Rate=1 Mb/s Tx-Power=16 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=21/70 Signal level=-89 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:9 Invalid misc:29 Missed beacon:0
Неудача! Попробуем устанавливать в mW
wlan0 unknown transmit-power information.
Current Tx-Power=16 dBm (39 mW)
16dBm это ~39mW, попробуем 20mW, проверим что работает
krll@pb:~$ sudo iwconfig wlan0 txpower 20mW
krll@pb:~$ iwconfig wlan0
wlan0 IEEE 802.11bgn ESSID:"wl0_Guest2"
Mode:Managed Frequency:2.462 GHz Access Point: 72:82:61:A5:21:78
Bit Rate=1 Mb/s Tx-Power=14 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=18/70 Signal level=-92 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:14 Invalid misc:46 Missed beacon:0
krll@pb:~$ sudo iwlist wlan0 txpower
wlan0 unknown transmit-power information.
Current Tx-Power=14 dBm (25 mW)
Пробуем 75mW
krll@pb:~$ sudo iwconfig wlan0 txpower 70mW
krll@pb:~$ iwconfig wlan0
wlan0 IEEE 802.11bgn ESSID:"wl0_Guest2"
Mode:Managed Frequency:2.462 GHz Access Point: 72:82:61:A5:21:78
Bit Rate=11 Mb/s Tx-Power=16 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=17/70 Signal level=-93 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:17 Invalid misc:46 Missed beacon:0
krll@pb:~$ sudo iwlist wlan0 txpower
wlan0 unknown transmit-power information.
Current Tx-Power=16 dBm (39 mW)
Как вы видете, выше 16dBm и 39 mW Tx-Power не устонавливает, как быть?