Re: Problems with Power Control with Linksys WPC 11

From: Jason Boxman (
Date: 2002-08-12 06:32:12 UTC

On Sunday 11 August 2002 10:32 pm, root wrote:
> Sorry to bother others,
> I got two questions when I use the hostap_cs to make a wireless test
> bed. I want to set up a mobile Ad Hoc network within a lab.
> 1. I used Linksys WPC 11 and Linksys WPC 11 version 3.0 cards in two
> Dell Notebooks.
> I used "iwconfig wlan0 txpower -50" to set power of tranmission to the
> minimum value. (I assum -44dBm is the minium one, correct me if I am
> wrong.) It seemed that the connection between these two laptops went
> down when the distance is around 8 meters. Did anybody do the similar
> test before and get smaller distance? This is still too long for me.

I have a couple of those myself (WPCv3, WMP). The only time I played with the dBm, I increased it to the max and the card ceased to work until I lowered the setting to its original value. Can you safely mess with the mW settings with the LinkSys Prism2 cards?

> 2. When two machines' connection went down, I moved them closer.
> However, they still can't connect to each other. I checked the output of
> iwconfig. I was using the same essid and set the same channel. But the
> cell ID in one machine was changed automatically when the link went
> down. I guess that may be the reason. How can I fix the cell ID?

Perhaps the loss of connectivity relates to the power settings? (See above.)

> Thanks a lot!
> Tao

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