Doug Lung /
08.15.2008 12:00 AM
White Space Devices Fail to Score at FedEx Field
Wireless microphone manufacturer Shure, Inc. said that white space devices failed to accurately detect wireless microphones during FCC tests conducted before a Redskins vs. Buffalo Bills pre-season game on Aug. 9 at FedEx field.

“The FCC’s tests of prototype white space devices at FedEx field prior to Saturday’s game between the Redskins and the Bills conclusively show that spectrum sensing white space devices will cause harmful interference to wireless microphones during live events,” said Mark Brunner, Shure’s senior director of public and industry relations.

Simply stated, the prototype devices were unable to consistently identify operating wireless microphones or distinguish occupied from unoccupied TV channels. More troubling, the devices failed to detect the presence of wireless microphones when switched on—an occurrence that takes place multiple times during any NFL game.

“Given the poor performance of these sensing devices, there is no reason to believe that the other proposed protections, such as beacons, will be any more capable of providing reliable and robust interference protection to wireless microphone transmissions,” Brunner said. “These tests reveal fundamental deficiencies of sensing devices—issues that cannot be pushed off with a promise to resolve these problems at some later time during certification testing.”

Brunner added that Shure appreciated that the FCC, NFL and ESPN acknowledged the importance of wireless mics at sporting events and agreed to the testing. He further called the use of wireless microphone technology as “critical” to players, referees and fans.

“If these sensing devices cannot be counted on, then the FCC must put them on the bench."

Scientific American covered the testing in their article Could Next-Gen Cell Phones Interrupt a Football Game?. The article disputes Brunner’s statement that the sensing devices failed. It quotes Kiran Challapali, a project leader at Philips Research saying, “Our prototype was tested for its ability to detect over-the-air ATSC (Advanced Television System Committee, or digital TV) and NTSC (National Television System Committee, or analog) signals, in addition to wireless microphones. We also successfully detected wireless microphones when switched on, in every instance."

You may recall from my earlier reports on the FCC white space device testing, that the Philips sensing unit was extremely sensitive, significantly limiting the number of channels available for use by the device.

The Scientific American article said the FCC would not reveal what it has found in its field tests.

Post New Comment
If you are already a member, or would like to receive email alerts as new comments are
made, please login or register.

Enter the code shown above:

(Note: If you cannot read the numbers in the above
image, reload the page to generate a new one.)

No Comments Found

Thursday 11:07 AM
The Best Deconstruction of a 4K Shoot You'll Ever Read
With higher resolutions and larger HD screens, wide shots using very wide lenses can be a problem because they allow viewers to see that infinity doesn’t quite resolve into perfect sharpness.

InGear /   Saturday 04:32 PM
Aurora InfoComm 2015 Preview
Wall Street Communications /   Saturday 03:30 PM
Artel Video Systems Names Mike Rizzo as President
Wall Street Communications /   Saturday 03:50 PM
Forscene Set to Expand in Asia-Pacific Region With New Reseller Strategy

Featured Articles
Exhibitions & Events
Discover TV Technology