ContributionsMost RecentMost LikesSolutionsRe: SD vs HD channels difference? Thank you for your response. However, I think that I have just figured it out. Apparently there is an auto-tune feature that automatically switches the <1000 sd channels to the equivalent hd channel. I had no idea before. SD vs HD channels difference? Is there still a difference between the regular channel numbers (ex. 03, 10, 38) and the 1000 series channels (ex. 1003, 1010, 1038)? I know that the regular channels used to be sd and the 1000 channels were hd... but I don't see any difference between them anymore. FYI... I live in Pensacola, FL.