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TV-mode, function - GF82.85-P-2011GQ

MODEL 164.1 with CODE (863) Digital/analog TV tuner as of model year 2009/YoM 08 model refinement package 

MODEL 164.8, 251.0/1 with CODE (863) Digital/analog TV tuner as of model year 2009/YoM 08 

Function requirements 

General 

The TV combination tuner (analog/digital) (A90/1) makes it possible to receive analog and digital television channels in the vehicle and view them on the display of the COMAND operating, display and controller unit.

Analog as well as digital TV signals are received via the antenna structure already present. The function is therefore described together. However, it should be noted that the TV combination tuner (analog/digital) separates the video and audio signals from each other. The TV mode is therefore comprised as follows:

Operating instructions 

The TV functions in the TV menu item can be selected, activated and set with the control buttons on the COMAND operating, display and controller unit.

Function sequence, TV signal reception 

The antenna signals for TV reception are received by the following antennas and routed via direct lines and the corresponding amplifier to the TV combination tuner (analog/digital):

Function sequence, video signal 

After the antenna signals for TV reception have been processed in the TV combination tuner (analog/digital), the video signals are output as follows:

Function sequence, audio signal 

After the antenna signals for TV reception have been processed in the TV combination tuner (analog/digital), the audio signals on vehicles with code (810) Sound system are relayed via the Media Oriented System Transport (MOST) to the COMAND operating, display and controller unit.

From the COMAND operating, display and controller unit the audio signals are forwarded via MOST to the amplifier for sound system (N40/3), with code (810) Sound system, and from there, via direct lines, to the following speakers:

IMPORTANT The audio signal for the subwoofer speaker (H4/29) travels from the COMAND operating, display and controller unit via MOST to the amplifier for sound system and from there, via direct lines, to the subwoofer amplifier (N40/9) and then to the subwoofer speaker.

IMPORTANT In vehicles without code (810) Sound system, the audio signals are output by the COMAND operating, display and controller unit via direct lines to the following speakers:

Supplemental information 

The supplemental information is subdivided into the following categories:

TV reception 

TV reception is subdivided into 2 subcategories:

Analog TV reception 

The TV combination tuner (analog/digital) receives and processes analog terrestrial television programs broadcast in all standards. The audio quality is limited to "MONO". The TV system operates with a total of 3 reception modules for video and audio signals. The "PLL tuners" that are used cover a reception range of 30 to 866 MHz.

In the process, the TV combination tuner (analog/digital) supports reception of the "PAL/SECAM" and "NTSC" TV standards. The TV combination tuner (analog/digital) has 4 antenna inputs for the TV signals from the amplifiers listed above. The listed amplifiers are not assigned to any particular TV tuner, but rather can be used by each TV tuner in an identical manner.

Digital TV reception 

In addition to analog television stations, it is also possible to receive terrestrial television stations broadcasting digital signals with the antenna structures already present. The Digital Video Broadcasting Terrestrial (DVB-T) standard is supported. In contrast to analog TV, the audio can be received in stereo here. The switchover from analog to digital TV reception is accomplished by the TV combination tuner (analog/digital) automatically, depending on the current reception status. It is not possible for users to switch over themselves.

However, switchover between alternative channels as well as between analog and digital reception can be prevented with the "Fix channel" control function. If stations with matching stations names are received (e.g. ARD analog and digital), only one entry is made in the list of stations.

IMPORTANT DVB-T can be used with a conventional antenna to receive more programs and in better quality.

Additional functions 

The TV combination tuner (analog/digital) possesses the following functions:

IMPORTANT Videotext function

Some stations, primarily in central Europe, offer videotext in addition to their television program. The TV combination tuner (analog/digital) is therefore equipped with its own videotext decoder. Only videotext broadcast with Latin ASCII characters are supported, i.e. Greek or Cyrillic characters are not supported.

As of 1.7.09 the TV combination tuner will support the following functions:

REFER TO SYSTEM WIRING DIAGRAMS Electrical function diagram for TV mode, function Model 164 PE82.85-P-2065-97MAA
Model 251 PE82.85-P-2065-97RAA
  Component description for COMAND operating, display and controller unit A40/3
With code (512) COMAND APS with DVD changer		 GF82.85-P-3134GQ 
  TV combination tuner (analog/digital), component description A90/1 GF82.90-P-4019GQ 
  Sound system amplifier, component description N40/3
With code (810) Sound system		 GF82.62-P-6003GQS
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