[Prism54-users] Output power regulation - SMC2802W

[Aurelien]

Hi,
a patch was submited some time ago for this. I took a look at it but did not merge it because there were some unresolved issues.
How should we use this oid (OID_INL_OUTPUTPOWER) ? 
1) The unit is claimed to be 0.25 dBm, and the max value is equivalent to 30dBm. I don't think any card will emit at this power. Legal value seems to be 20dBm. Or the power might be mesured before antenna, at some point in the unit.
2) There is probably a value for automatic mode (127 ?).
3) How does it behaves with negative values ?
4) Does it really works as expected ? I'm not able to test it...

Those problem would have lead to questions or complains from users... whereas saying "not supported" is easier ;-)

And last but not least, I don't think this feature will be usefull. Max value is hardware (or firmware ?) coded, and by default card adjusts power dynamically (allowing max value).

But if anyone find it usefull, feel free to work on it...

	...And justice for all

On Tue, 06 Jan 2004 23:39:06 +0100
Jens Maurer <Jens.Maurer@gmx.net> wrote:

> 
> Martin Viteznik wrote:
> > Hi,
> > can anyone tell me how to regulate output power of SMC2802W?
> > In old p54 forum I found this:
> > 
> > OID_INL_OUTPUTPOWER FF02000F
> > 
> >> Output power in units of 0.25 dBm.
> >> The highest maximum output power is restricted to the value at which 
> >> the card was calibrated to. And also the regulatory restrictions of 
> >> the country domain. Looks like the OID is readable and writeable and 
> >> not latched.
> 
> Here's a patch that allows to set outputpower in 0.25 dBm units.
> 
> My card says 127 when queried and allowed me to set it to 30.
> YMMV.
> 
> Probably needs some documenting regarding the 0.25 dBm units
> business.
> 
> Jens Maurer
>