I was pleasantly surprised when arriving at the Montpellier France Park Suite Arena and the outside venue RF scan showed very week TV in the UHF band. Upon entering the venue and doing an interior scan I was horrified to find thet across the entire band and beyond, noise about 5 MHz wide occurring every 20 MHz. I immediately defined the center located video screens as the hotspot with the noise completely disappearing as soon as I stepped into the lobby.
I asked to have the video powered down and sure enough, most of it went away but the venue insisted that the screens would be used for the show and must remain on. I said I would try and the promoter said that the venue would be forced off if there were any issues.
The tour show didn't need it, we had projection Imag.
An extra few minutes was needed then to carefully place all my 85 freqs between each noise barrier. Show went off without a hitch. I artificially designated DTV channels where each noise band appeared and manually adjusted other freqs. Here is what the scan in IMD looks like.
P.S., I never saw them show any video! I hate video screens, and NO, I don't know who made theirs.