Scott Fybush said:
This is where the rules transition from "crystal clear" to "opaque as dried mud," because the FCC in its infinite wisdom declined to specify a clear form for ID'ing an HD signal. The current version of the rules tells us:
A radio station operating in DAB hybrid mode or extended hybrid mode
shall identify its digital signal, including any free multicast audio
programming streams, in a manner that appropriately alerts its audience
to the fact that it is listening to a digital audio broadcast.
Many stations of late seem to believe that the text ID that accompanies the HD broadcast is "a manner that appropriately alerts" listeners, and thus have stopped doing an aural ID. I haven't seen the FCC cite anyone yet for a violation on this.
This may well be the answer to my original question. Though running open carrier for over a week (AFAIK with no audio ID's) , the HD2 has been continuously running a text ID.
The station in question leased the frequency from Clear Channel to provide local ethnic programming, starting last month. Then a week ago, after only about a month on the air, they stopped feeding programmng to the HD2, leaving it with an open carrier since then. There is a brief mention on their web stream page indicating they are having financial issues. It is unclear why they don't ask CC to simply shut down the HD2 for awhile, or put alternate programming on it, at least temporarily. And since they are continuing to stream online, how is this saving them money? Perhaps they are trying to save the cost of the connection from their studio to the station?