I narrowed it down to certain channel and that's when I learned about Dynamic Frequency Selection and how at one point in the United States, there's a subset of 5Ghz channels that were reserved ...

In the US, proper software support for DFS* is a challenge and FCC certification takes time and is expensive - many early 5GHz and cheaper routers do not bother to offer these channels as a result.

The original motivation for the DFS and TPC mechanisms defined in 802.11h ensure a standard method of operation under the regulatory requirements governing the 5-GHz band, which will spur ...

DFS and TPC are part of 802.11h, the European “flavor” of 802.11a. DFS dynamically instructs a transmitter to switch to another channel under particular conditions, such as the presence of a ...

Agilent’s new N7607B Signal Studio for DFS Radar Profiles software provides an easy-to-use, cost-effective solution for WLAN DFS testing. Based on Agilent’s general-purpose vector signal ...