Some viewers of KRCV-TV, Channel 7, who watch via satellite, may soon lose the signal. Sinclair Broadcast Group is warning subscribers to AT&T’s pay-tv services could be blacked out on September 27th unless a new carriage agreement is reached. Sinclair says its agreement with AT&T was set to expire in August and that it gave AT&T a five-week extension. A blackout would affect 136 TV stations, including Redding’s, as well as Sinclair’s Tennis Channel and subscribers to AT&T’s DIRECTV, U-verse and AT&T TV Now.