Summary: <br> Thank you for joining us on another great episode. The topic of episode 39 is when and how to use spectrum analysis.<br> Spectrum analysis is a crucial part of wireless site surveys and for troubleshooting. When performing spectrum analysis as part of a wireless site survey, an engineer can determine which areas contain sources of interference that can greatly degrade the performance of a wireless network.<br> Some interference is non-802.11 traffic. Wireless NICs within devices cannot demodulate these signals. If a transmission occurs with interference present, the frames are corrupted.<br> It’s important to know the different kinds of interferences that can exist.<br> <br> * Sporadic (happens only at specific times). An example is bluetooth<br> * Constant (the interference is there all the time). Example: Wireless Video Camera<br> — Both can be disruptive to the Wi-Fi if the duty cycle is high<br> — There is also the width of the interference to validate.<br> * Do not forget to watch out for interference from other Wi-Fi networks (even yours…)<br> * Duty cycle<br> * ACI<br> <br> Links and Resources<br> <br> * David Coleman, WLPC 2016, <a href="https://vimeo.com/album/3831972/video/157361943">Wi-Fi Troubleshooting</a><br> * <a href="http://www.metageek.com/products/wi-spy/index-3.html">Metageek Chanalyzer</a><br> * <a href="http://enterprise.netscout.com/enterprise-network/wireless-network/airmagnet-spectrum-xt">Spectrum XT</a><br> * <a href="http://www.ekahau.com/wifidesign/spectrum-analyzer">Ekahau</a><br> * <a href="http://www.tamos.com/products/wifi-site-survey/spectrum-analyzer.php">Tamograph</a><br> <br>
