Primary user of 5GHz band is weather radar service. Operators of that are universally fed up with interference caused by misconfigured wifi devices, so you shou

Primary user of 5GHz band is weather radar service. Operators of that are universally fed up with interference caused by misconfigured wifi devices, so you should do everything you can as to not interfere with that if you do not want to get huge fine from your local equivalent of FCC (in most other bands you will get a friendly warning that you are doing something you should not be doing, in 5GHz the enforcement is often swift as the amount of violators simply does not leave them much of a capacity for friendly warnings).