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HDM90 OPERATION
Overview
Analog to Digital Blending
Multicast Channels
(see illustration below)
The HDM90 HD Radio Tuner receives both analog and digital
radio stations. Once connected, the HDM90 provides a
higher quality digital version of many existing radio stations,
and enables extra HD2 and HD3 FM radio stations called
multicast channels.
Once an HD Radio station is selected, the HD Radio logo will
flash in the display for about 5 seconds, indicating that the
signal is blending from analog to digital. After the HD Radio
signal is received, the HD Radio logo will remain solid in the
display, indicating that the tuner is receiving a digital signal.
After the HD Radio logo remains solid in the display, HD or
HD1 will illuminate after the radio frequency.
• If "HD" appears, the radio station is broadcasting a higher
quality sound. No additional stations are available.
• If "HD1" appears, additional multicast channels (HD2
and/or HD3) are available.
A multicast channel is a digital-only radio station that cannot
be received by a standard analog tuner. These channels are
labeled as HD2 or HD3 (Example: 106.7-HD2). Once the HD1
station blends to digital, the HD2 or HD3 multicast channels
may be available by pressing the TRACK UP button.
Note: Only FM radio stations can have multicast channels.
HD Radio™ AM/FM Tuner Operation
Example of HD Radio Channels
Digital FM
Channel
Analog FM
Channel
87.5-HD
87.5
87.5-HD1 87.5-HD2
Digital FM
Channel
Multicast
Channel
Analog FM
Channel
87.5
87.5-HD1 87.5-HD2 87.5-HD3
Digital FM
Channel
Multicast
Channel
Multicast
Channel
Analog FM
Channel
87.5
No multicast
channels available
One multicast
channel available
Two multicast
channels available
Note: Channel 87.5 is used as an example and may not represent an HD Radio station. Multicast
channel availability varies per HD Radio station.