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2000 Volvo S & V70
Sending signals
The FM waves do not follow the earth's surface nor do they bounce off the atmosphere. For this reason
their range is limited. The AM waves follow the earth's surface and reflect against the atmosphere,
giving them a wide range.
Weak reception (fading)
Because of the limited range of the FM senders and the fact that these waves are very reflective, this
problem usually occurs with FM reception. If the sender is blocked by buildings or mountains, static can
result.
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