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RT3070 wireless adapter adjust tx power??

wallarug

I seem to be unable to adjust the tx power above 20dbm.  I have tried: 'iwconfig wlan0 txpower 22' but this does not change the txpower.

 

I have also disabled the power-management.

 

The adapter claims that it can hit 5800mW of power which aquates to about 37dBm.

 

Does anyone know how I can get the txpower up? (I can put it down, just not up)

 

root@raspberrypi:~# lsusb

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 001 Device 002: ID 0424:9512 Standard Microsystems Corp.

Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp.

Bus 001 Device 004: ID 148f:3070 Ralink Technology, Corp. RT2870/RT3070 Wireless Adapter

root@raspberrypi:~# iwconfig wlan0 txpower 30

Error for wireless request "Set Tx Power" (8B26) :

    SET failed on device wlan0 ; Invalid argument.

root@raspberrypi:~#

Parents

  • 1. You are probably right about this. Even some channels are blocked, depending upon the country settings.

    2. There do exist high power devices. I have an alpha wifi stick that claims to be high power.

    It will drain more than the allowed 500mA from your usb port.

    Most pc's only care about the total current used on all usb ports, so on a pc this can work.

    Wifi communication is bidirectional. It's useless to have a high power stick if the access point is unable to transmit in high power as well.

    For some cheap adapters without external antenne, sending more power could extend the usable range a little. High power devices usually will have a good antenna as you don't want the RF radiation to interfer with the surrounding chips.

  • in reply to Former Member

    NEW QUESTION:

     

    Where can I find the db.txt file?

     

    This will allow me to change the allowed txpowers for each country.

  • in reply to wallarug

    Hi Fergus,

     

    The easiest why to find files is to install locate using 'sudo apt-get install locate' Once you have it installed run 'sudo updatedb' afterwards run 'locate db.txt' to get a list of every file named db.txt. You can then add updatedb as a cron job and have it automatically update the file list db and then locate we stay up to date.

     

    Mike

  • in reply to msilveus

    Couldn't find it.  Any one know where the information about wireless power is stored?  I read about a file called db.txt but I could not find it.

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