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Porsche Communication Management (PCM)
Operation of On-Board Systems
The reception conditions for the radio module integrated in the PCM change continuously as you drive. Interference from buildings, terrain and the weather is unavoidable.
FM stereo reception is particularly susceptible to varying reception conditions.
Electronic accessories should only be retrofitted by your authorized Porsche dealer.
Accessories which have not been tested and approved by Porsche may impair radio function and reception.
The same applies when the tires are changed (e.g. summer/snow tires) or new tires fitted.
Full location accuracy is not yet achieved during the fine-calibration process.
If the vehicle has been transported (e.g. ferry, car train), the system may take a few minutes to determine the current location after it has been switched on.
Serious tire slip (e.g. spinning wheels on snow) may result in temporarily inaccurate navigation.
When the battery has been disconnected, it may take up to 15 minutes before the navigation system is operational again.
Car Audio Operation/Tips
Buildings, terrain, signal distance and noise from other vehicles are all working against good reception.
Some conditions affecting FM may appear to be problems when they are not.
The following characteristics are completely normal for a given reception area, and they do not indicate any problem with the radio itself.
Equipment which has not been tested and approved by Porsche may impair radio reception.
Fading and drifting
If a vehicle is moving away from the desired station'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 selection of a stronger signal.
Static and fluttering
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 adjusting the tone control for greater bass response until the disturbance has passed.
As a vehicle moves through these electronic dead spots, the listener may hear a momentary flutter or loss of reception.