They are great for finding and identifying interference, provided you understand what different RF signatures look like, but it's very difficult, if not impossible, to identify a lot of issues using just these kinds of tools. Tools like Wi-Spy and WiPry are very good tools for spectrum analysis, but require a bit more background knowledge and a more complete understanding of RF to really be useful. WiFi scanning, heat mapping, and spectrum analysis serve different purposes in wireless validation and troubleshooting, and different data may be important within some contexts.Ī tool (or suite of tools, rather) like Ekahau is as expensive as it is because it combines a lot of features together allowing to quickly gather, combine, visualize, and analyze most relevant data, but it's very cost prohibitive and doesn't make sense for occasional troubleshooting. This will depend heavily on the context of what your goals are.
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