I was watching an ESPN college football game on Saturday Oct 10th on my HD TV. I left the living room for my office where I have only SD. When I tuned into CH 140 it said the game was blacked out in my area. I went back to the living room where CH 140 (HD) was coming in just fine. I then tuned into CH 140 in SD in the living room and it also said "blacked out in my area" . Why would that be?