Please note: This project is no longer active. The website is kept online for historic purposes only.
If you´re looking for a Linux driver for your Atheros WLAN device, you should continue here .
Version 8 (modified by Žilvinas Valinskas <valins@soften.ktu.lt>, 13 years ago)
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How do I get my card to use turbo mode?

See here for a short explanation of what turbo mode is.

You can set your card to static turbo mode in master, managed and ad-hoc mode. Unfortunately, the driver does not support dynamic turbo mode yet. This means that non-turbo cards will not be able to associate with your AP, and also MadWifi cards not in turbo modes ( or, apparently, other makes of cards) won’t be able to see it.

One may need to set the countrycode ( UserDocs/CountryCode ) to 0 to get turbo mode working.

Issue the following commands:

iwpriv ath0 mode 3  # this forces it to G-only mode, but you can also use A mode (1))
iwpriv ath0 turbo 1 # enable turbo

This might not enable turbo ;) Depends on you countrycode ! For example 840 (USA)

# wlanconfig ath0 list chann                                                                                                                              
Channel   1 : 2412  Mhz 11g          Channel  48 : 5240  Mhz 11a Dynamic                                                                                  
Channel   2 : 2417  Mhz 11g          Channel  50 : 5250  Mhz 11a Static                                                                                   
Channel   3 : 2422  Mhz 11g          Channel  52 : 5260  Mhz 11a                                                                                          
Channel   4 : 2427  Mhz 11g          Channel  56 : 5280  Mhz 11a Dynamic                                                                                  
Channel   5 : 2432  Mhz 11g          Channel  58 : 5290  Mhz 11a Static                                                                                   
Channel   6 : 2437  Mhz 11g Dynamic  Channel  60 : 5300  Mhz 11a                                                                                          
Channel   7 : 2442  Mhz 11g          Channel  64 : 5320  Mhz 11a                                                                                          
Channel   8 : 2447  Mhz 11g          Channel 149 : 5745  Mhz 11a                                                                                          
Channel   9 : 2452  Mhz 11g          Channel 152 : 5760  Mhz 11a Static                                                                                   
Channel  10 : 2457  Mhz 11g          Channel 153 : 5765  Mhz 11a Dynamic                                                                                  
Channel  11 : 2462  Mhz 11g          Channel 157 : 5785  Mhz 11a                                                                                          
Channel  36 : 5180  Mhz 11a          Channel 160 : 5800  Mhz 11a Static                                                                                   
Channel  40 : 5200  Mhz 11a Dynamic  Channel 161 : 5805  Mhz 11a Dynamic                                                                                  
Channel  42 : 5210  Mhz 11a Static   Channel 165 : 5825  Mhz 11a                                                                                          
Channel  44 : 5220  Mhz 11a 

Then to enable/force turbo :

# iwconfig ath0 channel 0
# iwpriv ath0 mode 1         # 11a mode
# iwconfig ath0 channel 42   # channel  42 : 5210  Mhz 11a Static turbo
# iwconfig ath0 ...          # 
ath0      IEEE 802.11Ta ...  # 11a + Turbo enabled (static turbo). 

Question: 

# iwpriv ath0 turbo 0        # disables turbo ? driver doesn't care ? don't know
# iwpriv ath0 turbo 1        # enables turbo ? :) Driver doesn't care ? or it is adjusted depending on countrycode automatically ?