[CUWiN-Dev] Transmit power control / RSS measurement

[David Young]

On Thu, Apr 27, 2006 at 03:16:55PM -0500, Paul Smith wrote:
> David Young wrote:
> 
> >Transmit power is controlled by these sysctls,
> >
> >hw.ath0.tpscale = 0
> >hw.ath0.tpc = 0
> >hw.ath0.tpack = 63
> >hw.ath0.tpcts = 63
> 
> So, just to ask the naive question, if you, say, turn on TPC, with:
> 
> $ sysctl -w hw.ath0.tpc=1
> 
> then you can turn the other knobs and have coarsed-grain (i.e., not  
> at the packet-level) control over the power output of the device? And  
> this currently works? What values should I feed to these sysctls if  
> say I wanted to make my radio quieter in a lab space?

I'm not sure.  Documentation is lacking in NetBSD.  Maybe it is better
in FreeBSD, I haven't checked recently.  Anyway, I believe higher values
of tpscale translate to lower power.

Dave

-- 
David Young             OJC Technologies
dyoung at ojctech.com      Urbana, IL * (217) 278-3933