Re: Is it possible to decrease the Transmission power in D-link DWL 650 with hostap installed on linux

From: Jouni Malinen (
Date: 2002-06-19 18:23:31 UTC

On Wed, Jun 19, 2002 at 02:13:23PM -0300, Carlo Pires wrote:

> Is the hostap driver capable to determine the maximum tx power card ?

No. Prism2's baseband processor has a register, CR58 (TX power measurement), that might give some indication about the real TX power. However, I haven't yet studied how it would be mapped to some useful values.

> What I would happen if I set for 20dBm and the maximum of the card will
> be 13dBm ?

20 dBm (in iwconfig wlan0 txpower) is mapped to the maximum value for BBP's CR31 (Manual TX Power Control) and in this case it would really be 13 dBm.

Jouni Malinen                                            PGP id EFC895FA

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