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UHF TV Frequency Conflicts
Most of you are aware that the big commotion at NAB was the official announcement that broadcast television is going high definition. What you may not be aware of is that local TV stations will be allocated UHF channels up to channel 68 or 69 to do this. Currently, the lower frequency UHF wireless mics transmit in frequency ranges that will be taken over by TV. These radio mics will be rendered obsolete or will have to be upgraded somehow to operate in higher frequencies (not always possible). In addition, many police, fire, and public safety departments are currently operating in UHF frequencies that will be affected. They will also have to be re-assigned new frequencies, and they will have priority over film/video industries. That could mean our losing channels 60 thru 69, as well. Although television broadcasters will not be fully up and running with their UHF hi-def transmitters for two to five years, they will begin transmitting test signals way before then. Most new radio mics being sold are HDTV safe, either by side-stepping the affected frequency range or by straddling 2-3 consecutive TV channels with the assumption that the FCC will avoid adjacent channel placement. For instance, Samson UHF is above the affected frequencies. Audio Technica's new UHF system covers TV 57, 58, and 59 since it is not likely for all three channels to be in use in the same city.
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Last modified: 03/26/08
Los Angeles |