System overview
The system overview shows an example for functional networking:
| Item | Explanation |
|---|---|
| 1 | Head unit |
| 2 | DAB L band or SDARS roof-mounted aerial |
| 3 | VICS aerial amplifier |
| 4 | DAB III band aerial amplifier |
| 5 | FM/AM aerial amplifier |
| 6 | FM aerial amplifier |
| 7 | Wave trap 2, heated rear window |
| 8 | Rear Electronic Module (REM) |
| 9 | Power distribution box, rear |
| 10 | Rejector circuit, rear window defogger |
| 11 | Rear window heater and aerials |
| 12 | Rejector circuit ground, rear window defogger |
| 13 | Telematic Communication Box (TCB), optional |
The aerials in the rear window are connected to the aerial amplifier by 3 leads.
The rear window heater element is supplied with power via the rear window heater wave trap circuit.
The wave trap reduces the transmission of interference pulses in the aerials in the rear window from the vehicle electrical system. With an unprotected aerial system, those interference frequencies enter the aerial system from the vehicle's electrical system through the power supply to the rear window heater.