With the end of the DTV transition, the future use of TV channels 5 and 6, about which we have written before, is now back before the Commission in connection with an FCC filing by the Minority Media and Telecommunications Council, whose "radio rescue petition" was recently placed on a public notice opening a 30 day public comment period.   The FCC already has before it comments filed in its Diversity proceeding suggesting that these channels be reallocated for radio use, as Channel 6 is immediately adjacent to the lower end of the FM band, and the sound from many analog channel 6 TV stations could be heard on FM receivers.  While this petition has been opposed by certain TV interests, it is interesting to note that many television operators have been acknowledging that VHF channels, which had been the preferred channels for analog operations, may not be as advantageous for digital use, especially in urban areas, and may be particularly problematic for use with mobile digital television systems which are about to be introduced.

 In an analog world, VHF channels (those between 2 and 13) were prized by broadcasters, as stations operating on those channels could operate at power levels significantly lower than UHF stations (saving electricity costs), and still cover greater areas.  Many broadcasters thought that these benefits, particularly the lower power costs, would carry over into the digital world, and opted to remain on VHF channels for their digital operations – in some case abandoning the UHF temporary transition channel on which they were operating digitally during the period when they were running both a digital and an analog station before the end of the transition, to return to their VHF channel for their final digital operation.  Right after the digital transition was complete and these stations had moved back to their old VHF channels for their digital operations, in several major markets, many broadcasters operating on VHF channels found that their digital operations had significant problems, as the power levels were insufficient to reach many over-the-air sets, particularly those using "rabbit ears" antennas in urban areas.  Continue Reading Will TV Channel 6 Be Used For Radio? – MMTC Petition Raises the Issue, Again

On Friday, the FCC issued a public notice promising further testing of "white spaces" devices.   As we’ve written before, these devices are being promoted by many of the largest tech companies as ways to make more efficient use of the television spectrum by using low power wireless devices within that spectrum in places where those devices would not interfere with the operation of television reception.  The National Association of Broadcasters and other television groups have opposed allowing such operations for fear that they will cause interference to broadcast stations.  Especially during the digital transition, when listening habits are just being worked out and new digital televisions are just being purchase and installed by users, and because interference to a digital television station does not result in "snow" as in the analog world, but instead no picture at all, broadcasters fear that these devices could severely impact the success of the digital transition. 

In August, as we wrote here, the FCC released the first results of its interference studies, finding the potential for severe interference to television broadcasters.  While broadcast groups trumpeted these tests as proof of their fears, many of the tech companies claimed that the testing was flawed, using at least one device that was malfunctioning.  The tech companies essentially asked for a "do over," while the broadcasters argued that, even if a tested device was malfunctioning, that malfunction itself was enough to demonstrate that the devices are not reliable enough to protect television operations during this sensitive transition.Continue Reading FCC Plans More Testing of White Spaces Devices to Operate Within the Television Spectrum

As the digital television transition continues, broadcasters have been concerned about the proposals made by a number of the major computer companies seeking the right to operate low power wireless devices in the spectrum used by television stations – in the so-called "white spaces" between channels. Because of the potential for interference, television obviously don’t operate on every channel in every city. The proposal by the tech companies, about which we wrote here, would allow unlicensed wireless devices to operate at low power within this spectrum, provided that such devices were “smart” enough to detect television signals and to avoid the use of channels that would interfere with these signals. Last week, the FCC’s Office of Engineering and Technology issued a report finding that the prototypes of these devices that had been made available for testing appeared to interfere with television signals. The report did note, however, that this testing should not be viewed as the end of the story on this issue, as further refinements to the devices might be able to eliminate the interference. The FCC has asked for comment on this report. Public comments are due on August 15, with replies on August 30.

The white spaces debate has been a very contentious one. The tech companies who favor it have argued that the efficient use of the television spectrum, and the congestion in other portions of the spectrum used by unlicensed devices, mandate attempts to allow these devices to operate in the television band on the condition that they do not interfere with TV uses. These companies contend that they should be able to create devices that can sense television stations and avoid interference to these stations.Continue Reading FCC Study Deals Blow to Television White Space Advocates