Mazda 6 Service Manual: Operational Range
The system operates only when the driver is in the vehicle or within operational
range while the key is being carried.
Starting the Engine
NOTE
Starting the engine may be possible even if the key is outside of the
vehicle and extremely close to a door and window, however, always start the ...
Mazda 6 Service Manual: Radio Reception
AM characteristics
AM signals bend around such things as buildings or mountains and bounce off the
ionosphere.
Therefore, they can reach longer distances than FM signals.
Because of this, two stations may sometimes be picked up on the same frequency
at the same time.
FM characteristics
An ...