Antenna system (ATS), function - GF82.62-P-0001A

MODEL 220

Antenna system block diagram Shown with the following vehicle equipment:

Fig 1: Antenna System Block Diagram - Model 220

General information

The design of the various antennae is adapted to their special reception/transmission ranges.

A distinction must be made between passive and active antennas:

Passive antennas do not require a power supply, they are therefore not capable of direct amplification of the radio signals received.

Examples:

All antennae in the rear window
Telephone antenna (A2/49a1)

Active antennas have a power supply. They feature an integrated amplifier.

Example:

GPS antenna (A2/49a2)

The power supply is supplied by separate leads or via the coaxial leads which serve simultaneously for signal transmission (so-called phantom feed). In this case, no separate leads are required for the power supply.

Another difference between the antennae is that many antennae are only used for reception while others are used for both receiving and transmitting.

Examples:

Reception only:

GPS antenna (A2/49a2)

Transmission and reception:

Telephone antenna (A2/49a1)

The detailed descriptions of the individual systems and components are given in the reference documents listed below.

Cockpit Management and Data System (COMAND), function	With COMAND operating and display system (code 352a) Without USA version (code 494a)	GF82.85-P-0003A
	With COMAND operating and display system (code 352a) With USA version (code 494a)	GF82.85-P-0003B
Keyless Go function	With Keyless Go (code 889) up to 09/2002	GF80.61-P-0005S
	With Keyless Go (code 889) as of 10/2002	GF80.61-P-0005SM
Keyless Go antenna, location/task/design/function	With Keyless Go (code 889) up to 09/2002	GF82.62-P-4100S
	With Keyless Go (code 889) as of 10/2002	GF82.62-P-4100SM
Triggering heater mode with radio remote control immediately - Function	With stationary heater (code 228) up to 31.05.2000	GF83.70-P-3057A
	With stationary heater (code 228) as of 01.06.2000 up to 31.08.02	GF83.70-P-3057B
	With stationary heater (code 228) as of 01.09.2002	GF83.70-P-3057M
Antenna amplifier module, location/task/design/function		GF82.62-P-3105A
Rear window antenna location/task/design/function		GF82.62-P-3106A
GPS/CTEL roof antenna location/task/design/function		GF82.70-P-4111A
Antenna splitter, location/task/design/function	With TELE AID [Telematic Alarm Identification on Demand] emergency call system (D2B) (code 347) and COMAND operating and display system (code 352a)	GF82.85-P-3107A
TELE AID spare antenna, location/task/design/function	With TELE AID emergency call system (D2B) (code 347)	GF82.95-P-4102A