108
Saab 9-3 Audio System
FM
AM
Cross-modulation
Radio waves, FM/AM
Sources of AM interference
When the radio is tuned to a weak transmit-
ter in the vicinity of a stronger one, the car’s
antennas will receive signals from both.
Such interference is apparent when the
unwanted broadcast can be heard faintly in
the background.
FMradio wavesradiateinstraightlinesfrom
the transmitter. Because such wavesdo not
follow the curvature of the Earth, their
strength becomes weaker the further they
travel. That is why a large number of trans-
mitters are needed to provide good recep-
tion.
AM reception is prone to interference, e.g.
from electrical systems on other vehicles,
high-tension power lines and lightning.
AM waves, on the other hand, are reflected
off the ionosphere, thus greatly extending
their range.
| Categories | Saab 9-3 Manuals, Saab Manuals |
|---|---|
| Tags | Saab 9-3 M2000 |
| Model Year | 2000 |
| Download File |
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| Document File Type | |
| Copyright | Attribution Non-commercial |
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