On your remote, press the HOME button and the home menu will be displayed on top of your screen.
Navigate to Settings.
Navigate to Satellite Settings and press "OK".
Select Diagnostics and press "OK".
Signal reading on Tuner 1 will be displayed. Navigate to right arrow for next step.
Signal reading on Tuner 2 will be displayed. Navigate to "Done" and press "OK" to complete the diagnostics.