Illustrated on model 207.3 |
A90/4 | Tuner unit |
P82.60-9357-06
Shown on model 207.4 |
A90/4 | Tuner unit |
P82.60-9420-06
Location
The tuner unit is located on a major assemblies carrier below the trunk floor in a recess.
Tasks
Receive signals
Processing signals
Transmitting signals
Receive signals
Media Oriented System Transport (MOST)
Direct lines
Media Oriented System Transport (MOST)
The tuner unit is a MOST participant and communicates via this with the audio equipment.
Direct lines
In model 207.3, the tuner unit receives the following signals via direct lines:
Power supply through circuit 31 and circuit 30 g
Electronic wake-up for MOST
Multifunction antenna (A28/11) for Satellite Digital Audio Radio (SDAR) signals (with CODE 536 (SIRIUS satellite radio))
Rear window FM antenna amplifier (A2/19) (model 207.3), for DAB-Band-III signals (DAB 1) (with CODE 537 (Digital radio (DAB)))
TV 1 and DAB Band III antenna amplifier (A94/5), for DAB-Band-III signals (DAB 2) and TV-1 signals (with CODE 865 (TV tuner) and with CODE 537 (Digital radio (DAB)))
TV 2 and KEYLESS-GO antenna amplifier (A94/2), for TV-2 signals (with CODE 865 (TV tuner))
TV 3 antenna amplifier (A94/3), for TV-3 signals (with CODE 865 (TV tuner))
On model 207.4, the tuner unit receives the following signals over direct lines:
Power supply via circuit 31 and circuit 30g
Electronic wake-up for MOST
Multifunction antenna for Satellite Digital Audio Radio (SDAR) signals (with CODE 536 (SIRIUS satellite radio))
TV 1 antenna amplifier (A94/1), for TV-1 signals (with CODE 865 (TV tuner))
TV 2, DAB Band III and KEYLESS-GO antenna amplifier (A94/10), for TV-2 signals (with CODE 865 (TV tuner)) or for DAB-Band-III signals (DAB 1) (with CODE 537 (Digital radio (DAB))) over the TV antenna splitter (A2/89)
TV 3, FM2 and DAB Band III antenna amplifier (A2/54), for DAB-Band-III signals (DAB 2) (with CODE 537 (Digital radio (DAB))) or TV-3 signals (with CODE 865 (TV tuner))
The signals from the TV 3, FM2 and DAB band III (TV or DAB band III) antenna amplifier in model 207.4 are received by the tuner unit at the TV 1 antenna input, since the internal antenna splitter designed to separate the DAB and the TV signal is located at this antenna input. The signals from the TV 1 antenna amplifier (TV only) are received by the tuner unit at the TV 3 antenna input.
Processing signals
With CODE 536 (SIRIUS satellite radio), the tuner unit decodes and amplifies the satellite signals (Time For Division Multiplex (TDM)) and the terrestrial signals (Coded Orthogonal Frequency Division Multiplex (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
Transmitting signals
MOST
Direct lines
MOST
The tuner unit is a MOST participant and communicates via this with the audio equipment. The audio signals are sent to the audio unit or to the sound system amplifier control unit (N40/3) (with code (810) Sound system).
Direct lines
In model 207.3, the tuner unit transmits the following signals via a direct line:
Supply voltage to rear window antenna amplifier for FM antenna (with CODE 537 (Digital radio (DAB)))
Supply voltage to TV 1 and DAB band III antenna amplifier (with CODE 537 (Digital radio (DAB)) or with CODE 865 (TV tuner))
Supply voltage to TV 2 and KEYLESS-GO antenna amplifier (with CODE 865 (TV tuner))
Supply voltage to TV 3 antenna amplifier (with CODE 865 (TV tuner))
Video signals over a low voltage differential signal (LVDS) line to the head unit (with CODE 865 (TV tuner))
In model 207.4, the tuner unit sends the following signals over a direct line:
Supply voltage to TV 1 antenna amplifier (with CODE 865 (TV tuner))
Supply voltage to TV 2, DAB band III and KEYLESS-GO antenna amplifier (with CODE 537 (Digital radio (DAB)) or with CODE 865 (TV tuner)) via the TV antenna splitter
Supply voltage to TV 3 FM2and DAB band III antenna amplifier (with CODE 537 (Digital radio (DAB)) or with CODE 865 (TV tuner))
Video signals via an LVDS line to the head unit (with CODE 865 (TV tuner))
Body
In vehicles with CODE 498 (Japan version), the tuner unit is delivered 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 up with a seal.