Porsche 911 Carrera - Manual (Page 188)

Car Audio Operation/Tips
General information
For radio operation see your radio manual
which is included with your on-board litera-
ture.
Please observe the chapter ”LOAD SWITCH-
OFF AFTER 2 HOURS OR 7 DAYS” on page
293.
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 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.
Note
Electronic accessories should only be installed by
your authorized Porsche dealer. Equipment which
has not been tested and approved by Porsche may
impair radio function and 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
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 uttering
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 some-
times 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 until
the disturbance has passed.
Multipath
Because of the reflecting characteristics of FM,
direct and reflected signals may reach the antenna
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 multipath
area, interrupts the original signal, sometimes
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.
Compact disc player
Caution!
To avoid damage to compact disc player and
discs.
Use only compact discs labeled as shown,
having no dirt, damage or warpage.
Never attempt to disassemble or oil any part
of the player unit. Do not insert any object
other than a disc into the slot. Remember
there are no user-serviceable parts inside the
compact disc player.
Do not allow the disc to sustain any finger-
prints, scrapes or stickers on the surfaces.
This may cause poor sound quality. Hold the
disc only on the edge or center hole.
When not in use, take the disc out of the
player, put the disc back into its case and
store it away from dust, heat, damp and direct
sunlight. Leaving the disc on the dashboard in
the sun can damage the disc.
186
Controls, Instruments