Broadcast

摘要

A variable 600 MHz band plan would create “interference challenges” and could require hundredsnof kilometers of physical separation between TV transmitters and wireless operations, said NAB in anmeeting with FCC staff Monday, according to an ex parte filing and accompanying PowerPoint presentationnreleased Thursday (http://bit.ly/18NpDKL). Variable band plans, such as those proposed in thenFCC’s 600 MHz band plan public notice (CD May 21 p4), could involve interference “from mobile handsetsnor base stations to DTV reception” and “interference from high power DTV transmissions to lowerpowerednwireless operations,” NAB said. The minimum separation between broadcast stations and wirelessnoperations would be “about 350 km,” said NAB. The association’s PowerPoint presentation includesna chart giving the distance between New York City and surrounding cities — Philadelphia is 138 kilometersnaway, Boston 301 kilometers and Washington 331 kilometers. These large separation distances couldn“substantially” limit market variability on the East Coast, and spectrum recovered in one city could limitnhow much could be reallocated elsewhere, NAB said. The “separation distances needed result in wirelessnexclusion zones across much of the region,” NAB said.