Porsche carrera gt-2004 Manuel D’Utilisation

112

Controls, Instruments

Car Audio Operation/Tips 

f Please observe the chapter “LOAD SWITCH-

OFF AFTER TWO HOURS OR FIVE DAYS” on 

Page 156.

FM reception 
A vehicle is not an ideal place to listen to a radio. 

Because the vehicle moves, reception conditions 

are constantly changing. 

Buildings, terrain, signal distance and noise from 

other vehicles are all working against good recep-

tion. 

Some conditions affecting FM may appear to be 

problems when they are not. 
The following characteristics are completely nor-

mal for a given reception area, and they do not in-

dicate any problem with the radio itself. 

Note
Electronic accessories should only be installed by 

your authorized Porsche dealer.

Equipment which has not been tested and ap-

proved by Porsche may impair radio reception. 

Fading and drifting 
FM range is limited to about 25 miles (40 km), 

except for some high power stations. 
If a vehicle is moving away from the desired sta-

tion’s transmitter, the signal will tend to fade and/

or drift. This condition is more prevalent with FM 

than AM, and is often accompanied by distortion. 

Fading and drifting can be minimized to a certain 

degree by careful attention to fine tuning or selec-

tion of a stronger signal. 

Static and fluttering 
When the line-of-sight link between a transmitter 

and vehicle is blocked by large buildings or moun-

tains, the radio sound may be accompanied with 

static or fluttering because of the characteristic of 

FM. 

In a similar effect, a fluttering noise is sometimes 

heard when driving along a tree-lined road. 
This static and fluttering can be reduced by adjust-

ing the tone control for greater bass response un-

til the disturbance has passed. 

Multipath 
Because of the reflecting characteristics of FM, 

direct and reflected signals may reach the anten-

na at the same time (multipath) and cancel each 

other out. 

As a vehicle moves through these electronic dead 

spots, the listener may hear a momentary flutter 

or loss of reception. 

Station swapping 
When two FM stations are close to each other, and 

an electronic dead spot, such as static or multi-

path area, interrupts the original signal, some-

times the stronger second signal will be selected 

automatically until the original one returns. 

This swapping can also occur as you drive away 

from the selected station and approach another 

station of a stronger signal.