its a HDRADIO, not a FULL RDS tuner
its RDS support, is limited... when you get rds, it just PS, and Text
the tuner only displays hdradio artist/title for the currently tuned channel
so use HDARTIST and HDTITLE
HDSignal is when its digital, might also for convience be there when analog, i forget
The interface as far as RR is concerned is HDRadio...
im sure there are some good HD Radio Skins out there...
oh, btw, someone cleaver programed a program called SKINTOOL, use it, try out the radio commands as documented in NEW Radio Skin Commands.txt
best way to learn, but i can answer any question u got about it...