This morning when I was listening to 92.3 Now on my portable HD radio, the display said the call letters were " HD -FM", the artist was " HD -FM" and the title was "HD-1", and the audio was silent. No call letters, title, or artist, and dead air. I'm guessing the HD encoder wasn't encoding anything. The analog was fine, but when the signal was strong enough for HD, it muted. This is why I wish I had the feature to disable HD.