Introduction
Display when the radio is receiving an HD Radio broadcast
NOTE
HD radio volume may fade in and out at times due to coverage limitations.
HD radio is a brand name registered by the Ibiquity digital corporation1. They are the developer of a broadcasting technology called IBOC or In Band On Channel, which refers to the method of transmitting a digital radio broadcast signal centered on the same frequency as the AM or FM station's present frequency.
The IBOC system is referred to as a "hybrid" since it is both analogue and digital.
During hybrid operation, receivers still continue to receive the analogue (non-digital)
signal. HD radio receivers incorporate both modes of reception, where the receiver
will automatically switch to the analogue signal if the digital signal cannot be
decoded or is lost by the receiver. When you have tuned to an HD Radio station,
the 
symbol will appear in the audio
system display. The symbol is "grayed-out" when HD Radio is in standby mode and
white when the radio is actively receiving an HD broadcast.
More information about HD radio and IBOC can be found on Ibiquity's website, www.hdradio.com and www.ibiquity.com.
See also:
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