I just interviewed Neil Diener, CTO for Cognio, an innovative maker ofwireless LAN spectrum analyzers. Neil talks about what Cognio tools offerand the advantages of using spectrum analyzers over using "protocol" tools,such as NetStumbler, when deploying Wi-Fi networks. If you're not already using a spectrum analyzer, or you're having trouble deciphering the source of RF interference, listen to what Neil has to say. You'll likely find the need to add spectrum analysis to your set of test tools.