TV Industry Body, Mic-Maker: More DTV Receiver Testing Needed
Television trade publication Broadcasting & Cable is reporting that microphone-maker Shure as well as the National Association of Broadcasters are asking for more DTV receiver testing that would ensure that unlicensed mobile devices would not cause interference with digital television signals.
According to Shure, among the FCC's findings after testing eight "late-model DTV receivers" was that the receivers are extremely vulnerable to harmful interference not only from devices on adjacent channels but from ones two or more channels away.
Broadcasting & Cable explains the NAB pointed out that the FCC found that weak DTV signals were easily disrupted, and that that precludes the use of so-called spectrum "sensing " devices, which some commissioners have pointed to as a way to insure efficient spectrum use while protecting TV licensees.
The big issue here is that, as Broadcasting & Cable's John Eggerton notes, the FCC has already begun the process of opening up the spaces--so-called white spaces--between TV station frequencies for advanced wireless services, but has not decided whether those should be licensed or unlicensed.
"The bottom line for broadcasters and Shure is that the FCC must do more testing, expand those tests, and come up with rules that effectively protect existing devices, like TV sets and wireless microphones," Eggerton added.
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