Just in case, here's the 108-page user's manual for your TV:http://www.hdtvsolutions.com/pdf/MIT_WD-52525_WD-62525_WD-52725_WD-62725_Manual.pdf
Yor "NetCommand" TV remote is a wondrous thing, capable of throwing off anyone.
When the 'Device Selection Menu" is dispayed, and only when the device icon is highlighted
does the key work, and it also only works when the remote is in "A/V Receiver" mode -
not in "CABLE or DBS" mode, nor "VCR" mode, nor "DVD" mode.
So, (1) set the NetCommand remote to "A/V Receiver" mode
(2) bring up the Device Selection Menu, using the key on the remote
(3) highlight the Satellite receiver input icon (highlighted with a Yellow outline)
(4) press GUIDE on the remote, to swap the analog digital setting.
Also displays ChannelView for Antenna 1 and Antenna 2 - you may have accidentally
set the TV to get its input from the wrong Antenna.
If your TV has lost memory of its DBS source, you may have to re-teach the TV (using the remote)
that the DBS (Digital Broadcast Satellite) input exists, and to which input its connected.
Refer to "Edit NetCommand, Add an A/V Receiver", pages 39-45 of your Owner's Manual.