Most scanners have excluded the UHF TV band since the first ones were made. There are no crystals
AFAIK for that band, and until the upper portion (channels 69-83 or thereabouts) of the UHF TV band were reallocated few if any scanners would tune there. (470 to 512 used to be TV channels, too, which is why it is called "T-Band.")
The FCC had nothing to do with it. Scanner manufacturers have to balance consumer demand (as they perceive it - not always accurately) for frequency coverage with the technical difficulty (read: expense) of building a scanner that will do the job adequately. There has been no "need" for scanners to cover most of the UHF TV band until now, so scanners generally have not been designed to tune there.
The newest scanners cover the band, although the boundaries and capabilities within the 700 MHz band are variable among models.
__________________
David T. Stark, NF2G
Educator - Criminal Justice, Sociology
NF2G's Forensic Scannist Pages
http://nf2g.com/scannist
Don't run from the police. Motorola always beats Mopar!