Tuner Unit, Component Description - GF82.60-P-5015RDM
Model 172.4
as of model year 2017
with code 536 (Sirius satellite radio complete system)
Model 172.4
as of model year 2017
with code 537 (DAB digital radio standard (Digital Audio Broadcast))
Model 172.4
as of model year 2017
with code 865 (digital TV)
Shown on model 172.4
Location
The tuner unit is located in the trunk behind the right side paneling.
Tasks
- Receive signals
- Processing signals
- Transmitting signals
Receive signals
The tuner unit receives the input factors over the following connections:
- Direct lines
- Media Oriented System Transport (MOST)
Direct lines
The tuner unit receives the signals from the following components over direct lines:
- COMAND controller unit (A40/3) (wake-up signal)
- Multifunction antenna (A28/11) (with code 536 (SIRIUS satellite radio))
- FM 2, DAB and TV antenna amplifier (A2/19) (with code 865 (TV tuner) or code 537 (Digital radio (DAB)))
- TV 1 antenna amplifier (A94/1) (with code 865 (TV tuner) or code 537 (Digital radio (DAB)))
- TV 3 antenna amplifier (A94/3) (with code 865 (TV tuner))
MOST
The tuner unit communicates with the COMAND controller unit over MOST.
Processing signals
- With code 536 (SIRIUS satellite radio): The tuner unit decodes and amplifies the satellite signals (Time Division Multiplex (TDM)) and the terrestrial signals (Coded Orthogonal Frequency-Division Multiplexing (COFDM)) into pulse-code modulation (PCM) signals.
- With CODE 537 (Digital radio (DAB)), the tuner unit decodes the DAB band III signals into PCM signals.
- With CODE 865 (TV tuner), the tuner unit decodes and demodulates the TV signals and separates them into video and audio signals.
- With CODE 865 (TV tuner) and CODE 537 (Digital radio (DAB)), the tuner unit separates the DAB-Band-III signals from the TV signals on the TV 1 antenna input.
Model 172.4 as of model year 2017
with code 498 (Japanese version)
with code 865 (digital TV)
The tuner unit is shipped with a "B-CAS card". The "B-CAS card" is designed as a Subscriber Identification Module (SIM) card and inserted in the SIM card reader. The SIM card reader is covered with a seal.
Model 172.4 as of model year 2018 with code 865 (digital TV)
From the 29.03.2017 onwards, TV broadcasts in Germany will no longer be broadcast in the DVB-T1 transmission standard. The DVB-T2 transmission standard will be launched. In Korea, a conversion will be made to the High-Definition-Digital Multimedia Broadcasting (HD-DMB) transmission standard in August 2017.
This is way, as from 01.03.2017 onwards, tuner units will be installed in Europe that can receive the DVB-T2 transmission standard. In Korea, HD-DMB tuner units are installed.
DVB-T2- or HD-DMB tuner units can be retrofitted without any problems. To receive encoded stations, in a vehicle for the German market, a CI module can be inserted into the card reader. The card reader is connected by a USB line to the tuner unit.
Transmitting signals
The tuner unit sends initial parameters over the following connections:
- Low Voltage Differential Signal (LVDS) (with code 865 (TV tuner))
- MOST
LVDS (with code 865 (TV tuner))
The tuner unit sends video signals over the LVDS line to the COMAND controller unit.
MOST
The tuner unit communicates with the COMAND controller unit over MOST.
| Wiring diagram for tuner unit control unit | A90/4 | PE82.60-P-2108-97TAA |