HD Radio increases the audio quality of the received signal so that FM reception provides CD-quality sound reproduction, and AM reception provides a sound as rich as analog stereo FM. On HD Radio, both AM and FM offer interference-free, crystal-clear reception. An additional benefit is FM Multicasting – the ability to broadcast multiple program streams on a single FM frequency (e.g. 97.7-1, 97.7-2, etc.). The HD Radio Receiver Module is capable of receiving traditional analog programming from stations that do not have digital broadcasts, in addition to receiving digital broadcasts alongside analog programming from stations that do offer digital output.
The HD Radio Receiver Module replaces the AM/FM function in the IAM. The AM and FM antennas are connected directly to the HD Radio Receiver Module, not to the IAM; therefore, AM/FM functions in IAM are disabled.
The transmitted audio signals are digitally compressed by the radio transmitter. The audio signal, in addition to the digital broadcast, is also transmitted in its current analog form. The HD radio module receives the analog and digital signals via the AM and FM antennas, accompanied by text broadcasts. These signals are decoded by the module and reproduced as an audio output signal or shown as information text on the head unit's LCD or ICM LCD, depending on the installed system.
The HD radio module is located on the left side of the luggage compartment. The module receives fused power from the AJB. The module also connects to the MOST bus and is capable of communicating with other vehicle infotainment systems.
[The original text can be found at: www.LRman.ru]
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