When we opend this or hoover over the charts we've got back 2x Fixed Freq (Others) and 1 x Fixed Freq (Video).
These spikes are sending continous, so no adjecent AP's in my opinion, but external sources like Video indeed.
But we did not found any video camera's on wireless within the building.
But maye someone recognized a similar print and recognized the frequency related to a specific kind of equipment..