Apologies for the inconvenience, but AVForums will be offline from 6am Thursday 21st January 2021 for a few hours while we perform a major update to our core software. See what changes are coming.
As a start I suggest that you read the manual, this will/should tell you how to access the DTV menu for tuning..etc, I also suggest that you read this thread here on your tv, you can also use this thread to post any questions you have.