I have the latest updates

I have the latest updates installed on my HTPC with the Ceton InfiniTV 4 and nothing is broken on the system.

Sorry, I should have just wrote signal-to-noise instead of Eb/No. It is a measure of the quality of the incoming signal. If the ratio is extremely low (which is relative to exactly what is being looked at), it indicates a potential issue. Think of it like talking in a crowded bar where all the other voices are the “noise” and the person you are listening to is the “signal.” If the volume of the signal is too low compared to the noise, you’ll have a difficult time hearing the intended message.