We mostly avoid DFS frequencies on APs because of the impact if we get false radar detects. Also we are mostly a Cambium shop. So I'm a bit confused about DFS on other vendor equipment like Ubiquiti as well as home routers.
Question 1 - what happens when there's a DFS detection? On the Cambium gear, we have to select 1 or 2 alternate frequencies. But on other gear, I don't see this. When there's a DFS hit, does it jump to another random frequency? Does it rescan the current frequency until it tests clear and only then resume transmission? Is the answer right in front of me and I'm being stupid? Maybe in the case of routers they are exempt because of low EIRP? Question 2 - what about 40/80/160 MHz channels? We have a competitor using Ubiquiti gear and advertising residential subscriber speed plans up to 100x100. Clearly they must be using at least 40 MHz channels if not 80 MHz, or else their marketing people have burning pants and long noses. And I don't see how a WISP, especially one surrounded by other WISPs, could use wide channels other than in DFS bands. We have some PTP links using 40 MHz but only 10 and 20 MHz channels on our APs. So assuming you are using 40 or 80 MHz in DFS, what happens when there's a DFS detect? Does the whole 40 or 80 MHz have to find a new home? Can it slide over 2.5 or 5 MHz and substantially overlap the previous occupied spectrum? DFS bands come with enough spectrum to use wide channels, but is there enough to jump around when you take a DFS hit?
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