Motorola updates White Space devices; MSTV reports problems still exist

TV Technology reports that Motorola has updated the white space device it has submitted to the
FCC, adding features to improve its sensing of adjacent channels. As
the FCC Office of Engineering and Technology moved from the lab into
field testing of white space devices and their ability to detect (and
thus avoid interfering with) DTV signals, Motorola also encouraged the
commission to test its device in its “preferred” mode of operation,
relying primarily on a geolocation database to protect incumbents. But Friday, the Association for Maximum Service Television said it
observed labs tests of the new device, and said it failed in some cases. “In
the presence of a moderate or strong adjacent channel, they were not
able to sense the presence of a DTV signal,” MSTV President David
Donovan said.