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5. Infrared Detector: Provides detection of the infrared control
signal transmitted by an optional wireless remote control unit
(P/N SAT-RC) for remote operation. Make sure no obstructions
are blocking the signal path.
6. Shift (SFT) Button: When momentarily pressed, this button
provides access to additional functions, such as audio MUTE,
channel SCAN, direct channel access, category select, etc.
7. Power On/Off ( ) Button: Press this button to apply power
to the Satellite Radio Receiver. The associated stereo radio
must be turned on and off separately using its power switch.
8. Mute Function Button: Momentarily press the shift (SFT) but-
ton; then press and hold the down directional ( ) button to
enable the audio mute function. When enabled, the audio pro-
gram is muted and the Mute icon ( ) appears in the lower
right corner of the SCU display. Press any button to exit the mute
function.
9. Scan Function Button: Momentarily press the shift (SFT)
button; then press and hold the Up directional ( ) button to
enable the up channel scan function. When enabled, each
channel is scanned in the up direction for 10 seconds before
moving on to the next active channel. Each channel number
appears in reverse image (white-on-black) format. This per-
mits channel preview or introductory sampling of channel pro-
gramming. Press any button to exit the scan function.
SATELLITE RADIO RECEIVER (RRU)
The RRU is the central data receiving equipment required to process
the satellite signals from the external antenna; it contains the process-
ing logic needed to recognize, decode and distribute the incoming pro-
gram information. The RRU is typically installed under the seat or in the
trunk/rear of the vehicle.
SATELLITE RADIO RF MODULATOR
The RF Modulator receives the satellite RF signals from the RRU and
provides the necessary FM pass-band logic to recognize and pass these
signals on to your existing vehicle’s FM stereo system. So, when your
radio is tuned to one of the FM frequencies between 88.1MHz and
89.3MHz, you can enjoy XM
®
programming. The RF Modulator is typi-
cally mounted behind or under the dashboard.
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