1989-Mitsu-Factory Manual · Аудиосистема · страница 7 из 30 · Открыть оригинал PDF ↗
1 A-!; 1 There is more noise either on AM or on FM.
1. There is much noise only on AM
Due to differences in AM and FM systems, AM is more susceptible to noise interference.
Were conditions such as the following present when noise
was received?
e Lightning was flashing. A motorcycle was passing.
A vehicle passed close by, but it appeared to be a vehicle generating
large amount of noise radiation.
Yes
e Passed beneath a power line. Passed under a bridge.
e Passed beneath a telephone line. Passed close by a signal
8 Passed close by some other source of electrical noise.
No
Continue to check for static; when static is de-
tected, check for the conditions listed above.
L
Yes
D Noise prevention on the radio side is difficult.
If the problem is particularly worse than other
radios, consult a service center.
- -
No
- v
If the problem is particularly
worse than other radios, consult
a service center.
2. There is much noise only on FM
Due to differences in FM and AM systems, FM is
not as susceptible as AM to interference from en-
gines, power lines, lightning, etc. On the other
hand, there are cases due to the characteristics of
FM waves of noise or distortion generated by typ-
icad noise interference (first fading and multipath).
(Refer to A-2)
<Noise (hissing) occurs in weak signal areas such
as mountainous regions, but this is not due to a
problem with the radio.>
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