You may or may not be aware that after June 12, 2010, you will no longer be able to use wireless microphones that operate in the 700 MHz range. Arts Presenters has been following this issue very closely and has put together a good resource page on the subject. The page contains information on the ruling and has a link to help you figure out if your wireless mics operate in that range. If they don’t, you can keep using them. Some microphones can be re-tuned to operate outside that range which may also be good news.

I say may because APAP also hosted a conference call on the subject. The transcript may be found here. According to one of the speakers, Matthew Nodine, chief of staff for the FCC wireless bureau, the FCC has made room in the UHF band for all those displaced by this ruling. The question is whether you can stay there or will have to move again. From my reading the experts answering the questions don’t give any concrete assurances that wireless microphones can operate in that area over the long term. They even mention there are a number of other interests who wish to operate in the same area of the white space on an unlicensed basis.

“You have competing interest in the white spaces proceeding which has to be resolved for the commission to decide exactly what rule is going forward that should apply to wireless microphones, should apply to other users, should apply to the licensees and the other licensees in the band.”

There seems to be potential for being bumped from where you are operating at a later time if the FCC decides that space should be used for WiFi or cell phone internet operations. (Just as an example. I have no idea if operating in this span of bandwidth is viable for these functions.)

On a more positive note, it sounds like theatres could actually secure some frequencies by becoming licensed to use them. (my emphasis)

“The FCC is basically setting up a licensing opportunity as one of the possible destinations for operations on a permanent basis in the TV core spectrum. The value of licensing as you may have guessed is that you have enhanced interference protection as against white space devices. You are permitted, and I will just leave it there. You also have interference protections as against all unlicensed operations. You have flexibility to conduct two-way wireless mic related operations. Queuing is permitted for licensed operations for production personnel. It also permits certain types of uses of wireless devices to key stage hands, so sort of backstage uses which are related to performance. All are encompassed under the authority which licensed operators to which they are entitled.”

If you do employ a lot of two way communications, getting licensed may be a necessity. (again, my emphasis)

On the unlicensed side, if you chose not to be licensed, it seems like first of all the only sort of interference protection that you would enjoy would be to operate on certain set aside channels in the TV core where white space devices are not allowed to operate. I think this is a proposal in the commission’s order, but it says that such operations will be limited to 50 millowatts, 5-0 millowatts max power and would probably be limited to one-way only operations. …. it seems as if the queuing and the backstage kind of radio access, the two-way capabilities are very much a part of the performance experience and part of the production values which have been built into certainly into any sort of serious professional production. It looks to us for this particular community of users, that licensed use has a lot of the characteristics which really are the bedrock of any sort of quality performance.

What happens if you keep operating your 700 MHz devices after June 12, 2010? According to FCC wireless chief of staff Nodine,

“There are penalties that are going to be associated with wireless microphone system user who is using their wireless microphone system in the 700 megahertz range after June 12th. We don’t know – we can comment on what we believe those are going to be. And that’s probably going to be a, a fairly wide range of both civil and potentially criminal penalties. And it will be looked at on a case by case basis.”