Peter Erskine
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Currently the total scans are up to 138 with 9 of them still to be done in Asia. Some sites have venue pix as well as inside and outside UHF/VHF scans, DECT, 900 mHz and FM
https://www.bestaudio.com/spectrum-analyzer-setups
Peter Erskine
peter@bestaudio.com
http://www.bestaudio.com -
You are so correct. The day to day local RF is vastly different. In my case I want to do scans when all wireless is off, just to see the naked spectrum.
The purpose of these scans is to define what TV stations and other more permanent users of these bands are actually in use and how powerful or weak the signals are inside the venue.
Newer communications RF operates in the 900 band and the DECT band (1920-1930 MHz in USA). The users of these bands are not listed anywhere so direct scans are the best way to plan.
The coordination software can fill in what the FCC website says is in use but most of the time it is not correct. Either a channel or two are missing or some channels you think are clear are in use. Also the FCC DB gives no indication of the shielding effect of the venue. Usually there are weak DTV stations which are only the barest noise within a venue and are therefore useful for wireless use.
legally you can’t have a wireless operating on a TV channel within their contour. On the other hand if the station cannot be received at all within the venue, I believe it’s OK, you can’t interfere with their reception.
Shows with a lot of wireless sometimes send a coordinator to the distant venue to advance the spectrum and do their own scans prior to coordinating and specifying the equipment frequency bands. Often this is not possible, especially when traveling to other countries.
My current show is a musical tour with 72 to 85 frequencies in use. Some cities are very hard to make them all work and the scans give us a chance to get replacement equipment on more clear channels.
Having been in the dark myself about a future venue, this db is my effort to help inform the community of RF coordinators.
Peter Erskine
peter@bestaudio.com
http://www.bestaudio.com