Antenna system (ATS), function - GF82.62-P-0001C: Notes
MODEL 208, 210
Block diagram of antenna system
Preliminary remarks
This document describes primarily the audio, TV, telephone and navigation antenna system for vehicles with the COMAND cockpit management and data system.
General
The antennas described are designed for their special reception and transmitting ranges.
It is necessary to differentiate between passive and active antennas:
Passive antennas do not require a power supply, they are not capable of directly amplifying the radio signals received.
Examples:
- All antennas in rear window
- CTEL antenna (A2/49a1)
Active antennas are supplied with power. They are equipped with an integrated amplifier:
Example:
- GPS antenna (A2/49a2)
The power is supplied by separate leads or by the coaxial leads with which the actual signals are transmitted simultaneously (so-called phantom feed). In this case separate leads for the power supply are not required.
Another difference between the antennas is that some antennas serve only for reception and others are able to receive as well as transmit .
Examples:
Receiving only:
- GPS antenna (A2/49a2)
Transmitting and receiving:
- CTEL antenna (A2/49a1)
Detailed descriptions of the individual systems and components are given in the reference documents listed below.
| Cockpit management and data system (COMAND), function | Code 352a (COMAND) except code 491 (US version) except code 498 (Japanese version) |
GF82.85-P-0003C | |
| Rear window antennas, location/purpose/design/function | Models 208.3, 210 (except 210.2) With code 352a (COMAND) |
GF82.62-P-3106B | |
| FM/AM antenna amplifier, location/purpose/design/function | Models 208.4, 210.2 Models 208.3, 210 (except 210.2) without code 352a (COMAND) |
GF82.62-P-4101A | |
| Audio/TV antenna amplifier, location/purpose/design/function | Models 208.3, 210 (except 210.2) with code 352a and top left rear window antenna amplifier (A2/8) | GF82.62-P-3104B | |
| Models 208.3, 210 (except 210.2) with code 352a and bottom right rear window antenna amplifier (A2/25) | GF82.62-P-3104C | ||
| Models 208.3, 210 (except 210.2) with code 352a and bottom left rear window antenna amplifier (A2/24) | GF82.62-P-3104D | ||
| Models 208.3, 210 (except 210.2) with code 352a and top right rear window antenna amplifier (A2/9) | GF82.62-P-3104E | ||
| Global positioning system antenna, location/purpose/design/function | Model 208.4 with code 352a (COMAND), Code 353 (Audio 30 APS) |
GF82.61-P-4106A | |
| GPS/CTEL roof antenna, location/purpose/design/function | Model 208.3 with codes 347, 352a, 353 Model 210 with codes 347, 348, 352a, 353 | GF82.70-P-4111A | |
| TELE AID substitute antenna, location/purpose/design/function | Model 208.3 with code 347 (TELE AID (D2B)) Model 210 with codes 347, 348, 930 |
GF82.95-P-4102A | |
| Antenna splitter, location/purpose/design/function | Code 352a (COMAND) and code 347 (TELE AID (D2B)) | GF82.85-P-3107A |