Video module 5 makes the ”Television” and ”Videotext” functions available in the vehicle.
Video module 5 contains a TV receiver and the switchover facility for the video, audio and RGB signals. The video module controls the control display via RGB lines.
After ”ignition ON”, the video module automatically recognizes whether a navigation system is a component part of the overall system and responds accordingly.
Video module 5 is a self-diagnostic control module in the MOST network.
Control display: Apart from a few exceptions, the control display (CD) incorporates the controls and displays for the vehicle electronics. The control display coordinates the function requests from the system and assigns them to the relevant functions.
Controller: The control display is operated by means of the controller located on the front center armrest.
The rear window incorporates an antenna on both the left and right sides in the rear window defroster.
To amplify the received TV signals, separate amplifiers are installed for the left and right antennas. The amplifiers are supplied with power by video module 5 via the HF line.
The audio system controller (ASK) is a control module in the MOST network. The ASK is the system master. The ASK is responsible for managing all audio signals.
The MOST (Media Oriented Systems Transport) bus links the audio, video and navigation systems. Information relating to function requests is transmitted to the relevant control modules by means of MOST bus messages.
The ”antenna diversity” function integrated in video module 5 always ensures the best possible reception when the vehicle is stationary. In this procedure, video module 5 always selects according to specific criteria the antenna that offers the best reception.
Picture signals: Video module 5 transmits the picture signals over the RGB lines to the control display.
If a navigation system is fitted, it transmits the picture signals to video module 5. Video module 5 incorporates a changeover switch which with the appropriate request switches between navigation picture/menu and TV picture.
Sound signals: With a navigation system installed, the sound for voice output of the navigation system is switched through at the output of the LF lines to the ASK. Switching through takes place in accordance with the operating mode.
Video module 5 is connected to the ASK via the MOST bus. The ASK outputs the signals in amplified form through the speakers irrespective of whether the navigation system is fitted.
If no navigation system is fitted in the MOST network, video module 5 builds up the graphics for the menus (user interface).
If no navigation system is fitted, video module 5 builds up the graphics for the menus on the onboard monitor (user interface).
If a navigation system is fitted, the graphics in the control display (user interface) are set up by the navigation computer.
The picture data are looped by video module 5 through the navigation system. The sound signals are transmitted by video module 5 directly on the MOST bus.
Video module 5 is connected via the MOST bus (sound and control signals) and RGB picture data to the navigation computer.