First, if the 211 is similar to the 622, Press MENU, 6, 7 to get the HDTV Setup screen and make sure the input(ANALOG TYPE) is set to OFF AIR. If it was something else, change it and check your channels again.
If it was already OFF AIR, go back out of the Menu and follow this procedure:
1 - Make sure you have your off-air antenna connected to the receiver’s 8VSB TV Antenna/Cable connection.
2 - Press MENU, select System Setup ( 6), and then Local Channels ( 8) to open the Local Channels screen.
If this is the first time you have opened this screen, it will have no channels listed.
3 - Scan for channels by selecting Scan Locals.
4 - The scan will take a few minutes to complete. When it finishes, the results will show how many channels the scan found.
5 - Select OK to go back to the Local Channels screen.
Note: If the channel number says None, you have not yet assigned this channel a network affiliation or name. The Arrow at the bottom left means that there are more channels, off the bottom of the screen, which you can get to with the ARROW keys if you wish to edit their names or remove them.
6 - If you want to name the off-air channels, continue on. If you do not want to name your off-air channels, select Done.
You will then be taken out of the menus back to watching TV.
7 - Select a channel and then select Edit Name to modify the way the channel name displays on your screen.
8 - Use the virtual keyboard on the screen to select the letters of your channel name.
9 - When you are finished making changes, select Done.