RX7 2RTR- 1308cc 1.3L FI (1987)
NOTE:
Mazda has also developed a special "Diversity FM Reception System" featured on certain vehicles (see Owner's Manuals). This system compares signals
(FM stations only) received by two separate antennas and chooses the best signal for reception.
AM RECEPTION IN VEHICLES
AM signals can bend around obstacles and skip along the ground. AM signals can even travel upwards, bounce off of the ionosphere and then come back
to earth. Therefore, AM has a much longer range of reception than FM and can extend beyond the horizon.
However, AM signals can fade while passing under bridges, in tunnels, and in downtown areas. AM reception is also affected by electrical power lines
and other sources of electrical static including traffic lights, signs, and thunderstorms.
Stereo AM is now available on some vehicles and can be affected by the same conditions as monaural (nonstereo) AM.