Mitsubishi Mirage 2017, Owner'S Manual, Page: 232 / 305

General information about your radio
Comfort controls 7-45
7
The reason why one can hear FM but not AM
in parking garages, under bridges etc., is that
FM signals, unlike AM signals, are reflected
by solid objects such as buildings, etc.
Because FM signals are easily reflected by
buildings, this can also cause reception dis-
turbances.
The direct signal from the broadcast station
reaches the antenna slightly before the
reflected signal. This time difference may
cause some reception disturbance or flutter.
This problem occurs primarily in urban areas.
If one listens to a weak station and is in the
vicinity of another strong station, both sta-
tions might be received simultaneously.
Stereo reception requires a high quality
broadcast signal. This means that types of
disturbances mentioned previously become
more marked and the reception range is
somewhat diminished during stereo recep-
tion.
FM reception is affected by the electrical sys-
tems of vehicles in the vicinity, especially
those without an electronic noise suppression
device. The disturbance is even greater if the
station is weak or poorly tuned.
FM reception is not as sensitive to electrical
disturbances as AM. AM reception is sensi-
tive to electrical disturbances such as power
lines, lightning and other types of similar
electrical phenomena.
Reflection Cross modulation
FM stereo reception
Causes of disturbances
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