From: Carlo Pires (carlo_at_uganet.com.br)
Date: 2002-06-19 17:13:23 UTC
Jouni Malinen wrote:
>On Wed, Jun 19, 2002 at 07:04:12PM +0530, Manjunathan PY wrote:
>
>
>
>> I want to know if one can decrease the transmission power of D-Link DWL
>>650 PCMCIA card
>>on linux.
>>
>>
>
>Assuming you are using Host AP driver, yes it is possible. 'iwconfig wlan0
>txpower <val>' can be used to set TX power. <val> is value in dBm.
>However, it might not be that close to the real power level, but it should
>be monotone increasing. I have used -43 dBm as the minimum and +20 dBm
>as the maximum. Anything below -43 is equal to -43 and likewise with
>+20. E.g., 'iwconfig wlan0 txpower -43' will set the minimum power
>(and 'iwconfig wlan0 txpower auto' returns the TX control to station
>firmware).
>
>
>
>>What is the minimum power that is used here!
>>
>>
>
>This depends on the used card model and antenna. I did some measurements a
>while ago with D-Link DWL-650 and another card saw a decrease of about
>30 dBm when changing the txpower setting from maximum to minimum (Compaq
>WL100 allowed even more, about 50 dBm decrease). Anyway, at the minimum
>TX power setting the range of the card is quite limited; maybe a meter or
>so with 11 Mbps.
>
>
>
Is the hostap driver capable to determine the maximum tx power card ? What I would happen if I set for 20dBm and the maximum of the card will be 13dBm ?
--
_ Carlo Pires
�v� Linux user 277089
/(_)\ Goi�nia - GO - Brazil
^ ^ http://www.quemsabeumdia.com.br
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