Saturn 2009 ASTRA - Manual (Page 142)

Radio Reception
Frequency interference and static
can occur during normal radio
reception if items such as cell phone
chargers, vehicle convenience
accessories, and external electronic
devices are plugged into the
accessory power outlet. If there is
interference or static, unplug the item
from the accessory power outlet.
AM
The range for most AM stations is
greater than for FM, especially
at night. The longer range can cause
station frequencies to interfere
with each other. For better radio
reception, most AM radio stations
boost the power levels during
the day, and then reduce these
levels during the night. Static
can also occur when things like
storms and power lines interfere
with radio reception. When this
happens, try reducing the treble on
your radio.
FM Stereo
FM stereo gives the best sound, but
FM signals reach only about 10 to
40 miles (16 to 65 km). Tall buildings
or hills can interfere with FM signals,
causing the sound to fade in and out.
Cellular Phone Usage
Cellular phone usage may cause
interference with the vehicle’s radio.
This interference may occur when
making or receiving phone calls,
charging the phone’s battery,
or simply having the phone on. This
interference causes an increased
level of static while listening to
the radio. If static is received while
listening to the radio, unplug the
cellular phone and turn it off.
Fixed Mast Antenna
The fixed mast antenna can
withstand most car washes without
being damaged, or it can be
removed. If the mast should ever
become slightly bent, straighten
it out by hand. If the mast is badly
bent, replace it.
Check occasionally to make sure
the mast is still tightened to the
antenna base located on the roof of
the vehicle.
6-24 Infotainment