Hello,
If you are running the New Spectrum Guide (See Photos) on the Spectrum- 210 box, here is how to change the Output Resolution:
it is in the Setttings menu using the main menu it only allows 1 option to choose from: 480i, 480p, 720p, 1080i and you use a check box to pick one.
ODN-Navigator Guide Resolution change steps to follow.
Satch