Re: TX power

From: Jim Thompson (
Date: 2002-08-23 05:20:06 UTC

I plan to get the Senao cards on a spectrum analyzer in the next several days. I'll report back
on what occurs. (And yes, I sell them.)


On Monday, August 19, 2002, at 11:13 AM, Jouni Malinen wrote:

> On Fri, Aug 16, 2002 at 09:50:27PM -0300, Pablo Berra wrote:
>> I am using Senao 23dBm cards, and the iwpriv report me "TX power:
>> 20dBm".
>> Is it true?
> No, that value is not really on any exact scale.. 20 dBm just happens to
> be the maximum (no matter what the real wlan card max TX power is) and
> -43 dBm minimum. This range is mapped to TX power setting and it might
> even be logarithmic on some card models, but this is not necessarily the
> case..
>> If I try to change with the "iwconfig wlan# txpower <arg>" to some
>> other value, does something really happen?
> On all Prism2 models that I have tested, this have had some effect on
> the TX power.. Smaller values use less power and higher more (how
> suprising ;-), but other than that I would not trust the values. In
> addition, using the maximum value might not provide best possible signal
> quality.. I have used this mostly to lower the TX power to limit range
> and amount of noise or unwanted frames in my test setups.
> --
> Jouni Malinen PGP id EFC895FA

This archive was generated by hypermail 2.1.4.