(AP) -- A survey sponsored by broadcasters says nearly 2.2 million households that rely on antennas for their TV reception are unprepared for the shutdown of analog TV signals on Friday.

Research firm SmithGeiger surveyed 948 households that relied on antennas around the beginning of June and found that 1 in 8 had not connected a digital TV or box.

Those households stand to lose all major broadcasts channels Friday.

Households that have all their sets connected to cable or satellite service are unaffected by the analog broadcast shutdown.

©2009 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.