Wi-Spy Spectrum Analyzer helps you identify any wi-fi interference because it has been designed specifically to troubleshoot and analyze wi-fi networks. Wi-Spy Spectrum Analyzer allows you to see signal strengths as well as what channels are quiet and what possible channels to avoid making it easier to choose clear access points.
Wi-Spy Spectrum Analyzer also features a new Chanalyzer 2.0 wi-fi software, record and playback of data traces, a frequency and amplitude marker and spectral, topographic and planar views. Wi-Spy Spectrum Analyzer is great especially nowadays we are surrounded with non-wifi gadgets that can seriously corrupt wi-fi routine.
– $199.99 at thinkgeek