NEW YORK (AP) — About a quarter of the nation’s TV stations cut off their analog signals Tuesday, causing sets to go dark in households that were not prepared for digital television despite two years of warnings about the transition. Though most viewers were ready — and people with cable or satellite service were unaffected — some stations and call centers reported a steady stream of questions from frustrated callers. Many wondered how to get coupons for converter boxes that translate digital signals for older TVs — or how to get the devices working.–Contact The Daily Reveille’s news staff at [email protected]