Hi Richard,
In August of this yes, 2015, the FCC did a repositioning for the 600-700MHz band and said some wireless use would be permitted. When I found it, I posted it in as many places as I thought useful. Exactly how much was lost to me in their explanation. Bottom line: there may still be some hope for the 600 MHz band.
As regards audio of the wi-fi band. As I think you know, I have a couple of the Audio-Technica System 10 rigs. Outside in a totally filled parking lot I got 150 feet. That’s proves that System 10 does pretty well in very reflective metallic environment.
I’m not sure all the systems are triple back-up the way System 10 is. First, the receivers are at least antenna diversity, so if one receiver doesn’t get the signal, hopefully the other will. Second there is data redundancy, the same bit of audio is represented twice in the transmitted signal (sort of like the block redundancy in DAT machines — remember them?) Third, the transmitters and receivers are always “talking to each other.” When a frequency is chosen, there is always a backup frequency chosen. If communication breaks down on the first frequency, the system shifts to the second frequency. After it does, the system then seeks out a new backup frequency. So that’s Belt, Suspenders and what…raincoat. Again, I do not know if the other systems have this sort of protection.
There is still a problem, today 11/7/2015) with very small lavs that were designed before 2.4 GHz was rolled out. The RodeLink lav can pickup 2.4 GHz noise if the mic that comes with it is too close to the transmitter. The System 10 gear is good with the AT MT830 lav and BP892 ear-worn lav, but the micropoint BP896 still picks up the interference. AT is aware of the problem and is working on it.
I used the System on a shoot in downtown Baltimore. I had a problem with my G2. The talent likes wearing lots of metal bracelets. It seemed like they may have been contributing to some reflection interference. Here’s a clip of that piece. The MT830 lav is placed at the bottom of her V neck top.
https://www.youtube.com/watch?v=S39l7y1XPBk
Regards,
Ty Ford
Cow Audio Forum Leader
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