High definition tuner control unit, component description - GF82.60-P-5005GQ

MODEL 164.1 with CODE (517) HD Radio as of model year 09/YoM 08 model refinement package 

MODEL 164.8 with CODE (517) HD Radio as of model year 09/YoM 08 

MODEL 251.0 with CODE (517) HD Radio as of model year 09/YoM 08 

MODEL 251.1 with CODE (517) HD Radio as of model year 09/YoM 08 

Shown on model 164.1 

Location 

In model 164.1 and model 251, the high definition tuner control unit is located on the left, beneath the rear bench seat.

On model 164.8, the high definition tuner control unit is located in the center under the rear bench seat.

Task 

• Receiving signals 
• Demodulating and decoding signals 
• Transmitting signals 

Receiving signals 

Discrete lines 

• Power supply via circuit 31 and circuit 30g over one direct line each
• Electronic wake-up for Media Oriented System Transport (MOST) via one direct line
• FM2 and Weatherband signals from the antenna structure in the rear window via the FM rear window antenna amplifier (A2/19) and via the roof antenna module (A2/93) using a coaxial line
• S-band satellite and S-band terrestrial signals from the SDAR antenna (A2/93a5) via the roof antenna module using a coaxial line
• AM and FM signals from the FM/AM/RRCL [FZV] antenna (A2/93a1) via the roof antenna module using a coaxial line

Demodulating and decoding signals 

• Demodulating the analog AM and FM signals by the two integrated double tuners
• Decoding the digital AM and FM signals with the integrated HD radio decoder chip
• Decoding the signals for S-band satellite and S-band terrestrial

Transmitting signals 

• Direct lines 
• MOST 

Direct lines 

• Phantom voltage at the FM rear window antenna amplifier via the roof antenna module using a coaxial line
• Phantom voltage at the SDAR antenna via the roof antenna module using a coaxial line
• Phantom voltage at the FM/AM/RRCL [FZV] antenna via the roof antenna module using a coaxial line

MOST 

• Demodulated and decoded analog and digital AM/FM signals and Weatherband signals as digital audio signals to the COMAND operating, display and controller unit (A40/3)
• Demodulated and decoded digital AM/FM signals as digital data signals (e.g. frequency, station name, artist, etc.) to the COMAND operating, display and controller unit.
• Demodulated and decoded digital S-band satellite and S-band terrestrial signals as digital audio signals to the COMAND operating, display and controller unit
• Demodulated and decoded digital S-band satellite and S-band terrestrial signals as digital data signals (e.g. channel, artist, category, station list, etc.) to the COMAND operating, display and controller unit
• Demodulated and decoded digital S-band satellite and S-band terrestrial signals as digital traffic data signals to the navigation unit integrated into the COMAND operating, display and controller unit

	Satellite Digital Audio Radio System (SDAR) wiring diagram	Model 164	PE82.60-P-2300-99MAB
		Model 251	PE82.60-P-2300-99RAB