General Information About Your Radio - Mitsubishi MIRAGE Service Manual

General information about your radio

General information about
your radio
Your vehicle's radio receives both AM and
FM stations.
The quality of your reception is affected by
distance, obstacles, and signal interference.
Signal transmission
7
FM signals do not follow the earth surface
nor are they reflected by the upper atmo-
sphere. For this reason, FM broadcasts cannot
be received over long distances. AM signals
follow the earth's surface and are reflected by
the upper atmosphere. For this reason, AM
broadcasts can be received over longer dis-
tances.
FM AM
25 to 40 mile radius 100 mile radius
(40 to 64 km) (160 km)
7-42 Comfort controls
Weak reception (fading)
Because of the limited range of FM signals
N00733900455
and the way FM waves transmit, you may
experience weak or fading FM reception.
When the broadcast is blocked by mountains
or similar obstructions, reception can be dis-
turbed.
Reflection
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.
I n f o r ma t i o n P r o v i d e d b y :
Cross modulation
If one listens to a weak station and is in the
vicinity of another strong station, both sta-
tions might be received simultaneously.