User Feedback :: anyone knows how to scan wireless signal?

Quote

...containing an Atheros chipset I don't believe ndiswrapper is being used at all.

Atheros doesn't require ndiswrapper, which is only used for cards and adapters that lack native Linux drivers and for which the Windows binary drivers must be kludged to work in Linux. The support of features in ndiswrapper is limited by factors such as version of wireless extension, version of wireless tools, and version of ndiswrapper. Some cards and adapters work much better than others.

original here.