How to stop AirPort constantly scanning for networks?

[Esulatell]

I'm already connected to a wi-fi and seeing as i'm on a desktop I don't think i'm going to be connecting to many others so how do I stop my AirPort card scanning for new networks constantly?

Thanks

 

[utkillsall]

it only searches for new connections when you click on the icon, so it may just seem like it's always searching when it really isnt