Originally Posted by bwam
Conversely does it also mean that if I cannot get an FM station well, I will not get its HD stream well? For example I get 101.5 OK sometimes (50% depending on time of day), and with noise and static at other times (50%). What would happen with the HD stream for 101.5 (they do broadcast in HD) in my situation?
It really depends on what's causing the interference. The HD broadcast tends to be at a fraction of the power of the analog, so if your reception issues are because of distance / terrain then you probably won't get a good lock on the HD. My unofficial measurement is that you'll get about 1/3 of the analog range as HD.
However, if the reception issues are due to interference, you might benefit from the HD -- if the interference isn't hitting the HD signal.
For example: If 101.5's interference for you is due to another 101.5 in close proximity, the HD might be fine. How? If that other 101.5 isn't broadcasting an HD signal then your 101.5's HD will have less to fight. As a result, the HD signal may come in better than the analog.
Also might be that the HD radio has a better tuner than your existing one and just does a better job. Or, maybe the opposite :b~