GF82.90-P-4019LE TV Combination Tuner (Analog/Digital), Component Description

GF82.90-P-4019LE TV Combination Tuner (analog/digital), Component Description
- with CODE (863) Digital/analog TV tuner

Component Identification:

Location
The TV combination tuner (analog/digital) is installed on the left in the trunk.

Task
The TV combination tuner (analog/digital) performs the following tasks:
^ Reading in analog and digital TV signals
^ Evaluating input factors
^ Output of output values
^ Exchange of control commands and transmission of audio signals and data of the additional TV services

Reading in analog and digital TV signals
Signals are read in via the following connection:
^ Direct line

Direct line
The following signals are read in via direct lines:
- Electronic wake-up for Media Oriented System Transport (MOST)
- Analog and digital TV signals from TV antennas 1 to 4 over the rear window antenna amplifier module (A2/12)

Evaluation of input factors
The amplified TV signals are evaluated internally and separated into video and audio signals.

Output of output values
The initial parameters are output via the following connection:
^ Direct line

Direct line
The following signals are sent via direct lines:
- Control signals to the rear window antenna amplifier module
- Video signals to the COMAND controller unit (A40/3) via a Y - brightness (luminance)/C - color information (chrominance) (Y/ C) line
- Video signals to the DVD player (A40/4) via a Y/C line (in model 221 with code (864) Rear entertainment system)

Exchange of control commands and transmission of audio signals and data of the additional TV services
The TV combination tuner (analog/digital) is a MOST subscriber and correspondingly transmits the following data:
- Control data
- Audio signals
- Additional data, e.g. for videotext

In model 221 with code (864) Rear entertainment system, the TV combination tuner (analog/digital) is a telematics CAN subscriber. The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).