Dual HDM90 User Manual

HDM90

INSTALLATION/OWNER'S MANUAL

HD Radio™ Tuner

HDM90 INSTALLATION

BLUE 1m Male-to-Male Cable

(included with HDM90)

BLACK 1m Antenna Extension

(included with HDM90)

FRONT R/SUB

L-CH

R-CH

REMOTE IN

BLUE 10-pin Female Mini-DIN

(HDM90 Head Unit Connection)

Head unit antenna connector is not

used when HDM90 is connected

Vehicle antenna

Installation

Connecting the HDM90:

• With the arrow facing up, line up and connect one end of the included blue mini-DIN cable to the
connector labeled "HEAD UNIT" on the HDM90. The cable and connector are keyed to only t one way.
Make sure not to turn the cable when connecting as it may damage the pins in the cable.

• Connect the other end of the blue mini-DIN cable to the blue 10-pin connector on the back of the
head unit. The included blue mini-DIN cable is not directional.

• Disconnect the vehicle antenna connector from the head unit (if connected) and plug the vehicle
antenna into the HDM90, using the included 1m antenna extension cable (if necessary). The antenna
connector on the back of the head unit will not be used after the HDM90 is installed.

• After routing the cables carefully, secure the HDM90 away from moving parts using cable ties or
screws using the chassis mounting tabs. Always check for proper clearance before you drill.

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HDM90 OPERATION

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

HD Radio™ AM/FM Tuner 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.

Example of HD Radio Channels

No 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.

One multicast

channel available

Two multicast

channels available

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